:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #4facfe;
    --warning-color: #43e97b;
    
    --background-color: #f8faff;
    --surface-color: #ffffff;
    --surface-elevated: #ffffff;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --chat-user-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --chat-bot-bg: #ffffff;
    --chat-system-bg: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    
    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.75rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    margin: 0;
    height: 100vh;
    background: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
    40%, 43% { transform: translate3d(0, -8px, 0); }
    70% { transform: translate3d(0, -4px, 0); }
    90% { transform: translate3d(0, -2px, 0); }
}

@keyframes streaming {
    0% { 
        border-color: #007bff;
        box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
    }
    50% { 
        border-color: #0056b3;
        box-shadow: 0 0 8px rgba(0, 123, 255, 0.7);
    }
    100% { 
        border-color: #007bff;
        box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
    }
}

/* Navigation */
.nav-instance {
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    position: relative;
    flex-shrink: 0;
    top: 0;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: 40px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.nav-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.ai-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.user-welcome:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    border: 2px solid white;
}

.welcome-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: 352px 1fr 420px;
    grid-template-rows: 1fr;
    height: calc(100vh - 80px);
    gap: 0;
    transition: var(--transition-normal);
}

.main-layout.collapsed {
    grid-template-columns: 60px 1fr 420px;
    grid-template-rows: 1fr;
}

.main-layout.right-collapsed {
    grid-template-columns: 352px 1fr 60px;
    grid-template-rows: 1fr;
}

.main-layout.collapsed.right-collapsed {
    grid-template-columns: 60px 1fr 60px;
    grid-template-rows: 1fr;
}

/* Conversation History Panel */
.conversation-panel {
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
    z-index: 10; /* Increase z-index to be above chat-section */
}

/* Subtle STT toast (barely noticeable) */
.stt-toast {
    position: fixed;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.55);
    color: rgba(255, 255, 255, 0.9);
    padding: 6px 10px;
    border-radius: 12px;
    font-size: 12px;
    line-height: 1;
    opacity: 0;
    transition: opacity 200ms ease;
    pointer-events: none;
    z-index: 2000;
}

.stt-toast.show {
    opacity: 1;
}

.main-layout.collapsed .conversation-panel {
    width: 60px;
}

.main-layout.collapsed .conversation-panel .conversation-content {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    padding: 4rem 0.5rem 1rem !important;
    gap: 0.75rem !important;
    height: 100% !important;
    width: 100% !important;
    overflow: hidden !important;
}

.main-layout.collapsed .conversation-panel .conversation-toggle {
    position: absolute;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

/* Hide text content and show only icons in collapsed mode */
.main-layout.collapsed .conversation-action-strip {
    width: 40px !important;
    height: 40px !important;
    padding: 0 !important;
    margin: 0.5rem 0 !important;
    background: transparent !important;
    border: none !important;
    justify-content: center !important;
    align-items: center !important;
}

.main-layout.collapsed .strip-content,
.main-layout.collapsed .strip-arrow,
.main-layout.collapsed .strip-title,
.main-layout.collapsed .strip-subtitle {
    display: none !important;
    visibility: hidden !important;
}

.main-layout.collapsed .strip-icon {
    width: 36px !important;
    height: 36px !important;
    margin: 0 !important;
    padding: 8px !important;
    background: var(--primary-gradient) !important;
    border-radius: 50% !important;
    color: white !important;
    font-size: 1rem !important;
    box-shadow: var(--shadow-sm) !important;
}

.main-layout.collapsed .conversation-stats {
    display: none !important;
    visibility: hidden !important;
}

.main-layout.collapsed .conversation-list {
    display: none !important;
    visibility: hidden !important;
}

.main-layout.collapsed .new-conversation-card {
    width: 40px !important;
    height: 40px !important;
    padding: 0 !important;
    margin: 0.5rem 0 !important;
    border-radius: 50% !important;
    background: var(--primary-color) !important;
    border: 2px solid var(--primary-color) !important;
    color: white !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

.main-layout.collapsed .new-conversation-card .session-preview {
    display: none !important;
}

.main-layout.collapsed .new-conversation-card .session-icon {
    background: transparent !important;
    box-shadow: none !important;
    font-size: 1rem !important;
}

.conversation-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-normal);
}

.conversation-header {
    padding: 1.5rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    position: relative;
    padding-left: 3.5rem; /* Make room for toggle button on the left */
}

.conversation-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.3;
}

.conversation-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.conversation-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.conversation-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.conversation-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    z-index: 100;
}

.main-layout.collapsed .conversation-toggle {
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.collapsed .conversation-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.new-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-chat-btn i {
    font-size: 1rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.25rem;
    background: var(--surface-color);
}

/* New conversation card styling - matches session cards but with distinctive style */
.new-conversation-card {
    height: 48px !important;
    max-height: 48px !important;
    min-height: 48px !important;
    padding: 8px 12px !important;
    margin: 0 !important;
    margin-bottom: 8px !important;
    border: 2px dashed var(--primary-color) !important;
    border-radius: 6px !important;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(102, 126, 234, 0.02) 100%) !important;
    display: block !important;
    font-size: 14px !important;
    line-height: 20px !important;
    position: relative !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    box-shadow: 0 1px 3px rgba(102, 126, 234, 0.1) !important;
}

.new-conversation-card:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.12) 0%, rgba(102, 126, 234, 0.08) 100%) !important;
    border-color: var(--primary-color) !important;
    border-style: solid !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 3px 12px rgba(102, 126, 234, 0.2) !important;
}

.new-conversation-card .session-content {
    display: flex !important;
    align-items: center !important;
    gap: 12px !important;
    width: 100% !important;
    height: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
}

.new-conversation-card .session-icon {
    width: 24px !important;
    height: 24px !important;
    background: var(--primary-gradient) !important;
    border-radius: 50% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: white !important;
    font-size: 12px !important;
    flex-shrink: 0 !important;
}

.new-conversation-card .session-preview {
    font-size: 14px !important;
    line-height: 20px !important;
    color: var(--primary-color) !important;
    font-weight: 600 !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
    white-space: nowrap !important;
    text-overflow: ellipsis !important;
    flex: 1 !important;
}

.new-conversation-card:hover .session-preview {
    color: var(--primary-color) !important;
}

/* BIGGER CARDS: Clear borders and better text spacing */
.conversation-list .session-card {
    height: 60px !important;
    max-height: 60px !important;
    min-height: 60px !important;
    padding: 12px !important;
    margin: 0 !important;
    margin-bottom: 3px !important;
    border: none !important;
    border-radius: 6px !important;
    background: rgba(255, 255, 255, 0.9) !important;
    display: block !important;
    font-size: 14px !important;
    line-height: 20px !important;
    border-left: none !important;
    position: relative !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1) !important;
}

.conversation-list .session-card:hover {
    background: rgba(102, 126, 234, 0.08) !important;
    border-left-color: transparent !important;
    border-color: transparent !important;
    transform: translateX(2px) !important;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.15) !important;
}

.conversation-list .session-card.active {
    background: rgba(102, 126, 234, 0.12) !important;
    border-left-color: transparent !important;
    border-color: transparent !important;
    transform: translateX(4px) !important;
    box-shadow: 0 3px 12px rgba(102, 126, 234, 0.2) !important;
}

.conversation-list .session-content {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    height: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    gap: 8px !important;
}

/* Session message icon styling - override for horizontal layout */
.conversation-list .session-message-icon {
    position: static !important;
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    width: auto !important;
    height: auto !important;
    background: transparent !important;
    border-radius: 0 !important;
    flex-shrink: 0 !important;
    margin-right: 0 !important;
    gap: 4px !important;
    color: var(--primary-color) !important;
    font-size: 14px !important;
}

.session-message-icon i {
    font-size: 12px !important;
    color: var(--primary-color) !important;
}

/* Session card layout - horizontal alignment */
.session-content {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    width: 100% !important;
    height: 100% !important;
    gap: 8px !important;
    padding: 0 !important;
    margin: 0 !important;
}

.session-message-icon {
    display: flex !important;
    align-items: center !important;
    gap: 4px !important;
    flex-shrink: 0 !important;
    color: var(--primary-color) !important;
    font-size: 14px !important;
}

.message-count {
    background: var(--primary-color) !important;
    color: white !important;
    font-size: 10px !important;
    font-weight: 600 !important;
    min-width: 18px !important;
    height: 18px !important;
    border-radius: 9px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 0 4px !important;
    line-height: 1 !important;
}

.conversation-list .session-preview {
    font-size: 14px !important;
    line-height: 20px !important;
    color: #333 !important;
    font-weight: 500 !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
    white-space: nowrap !important;
    text-overflow: ellipsis !important;
    flex: 1 !important;
    display: block !important;
    min-width: 0 !important;
}

.conversation-list .session-card:hover .session-preview {
    color: var(--primary-color) !important;
    font-weight: 600 !important;
}

.conversation-list .session-card.active .session-preview {
    color: var(--primary-color) !important;
    font-weight: 600 !important;
}

.conversation-list .session-time {
    font-size: 11px !important;
    color: #666 !important;
    position: static !important;
    right: unset !important;
    top: unset !important;
    transform: none !important;
    font-weight: 500 !important;
    background: transparent !important;
    padding: 0 !important;
    border-radius: 0 !important;
    min-width: 40px !important;
    text-align: right !important;
    border: none !important;
    flex-shrink: 0 !important;
    margin-left: auto !important;
    white-space: nowrap !important;
}

.conversation-list .session-card:hover .session-time {
    color: var(--primary-color) !important;
    font-weight: 600 !important;
}

.conversation-list .session-card.active .session-time {
    color: var(--primary-color) !important;
    font-weight: 600 !important;
}

/* NEW CONVERSATION CARD - Styled like session cards */
.new-conversation-card {
    height: 48px !important;
    max-height: 48px !important;
    min-height: 48px !important;
    padding: 8px 12px !important;
    margin: 0 0.25rem !important;
    margin-bottom: 8px !important;
    border: 2px dashed var(--primary-color) !important;
    border-radius: 6px !important;
    background: rgba(102, 126, 234, 0.03) !important;
    display: block !important;
    font-size: 14px !important;
    line-height: 20px !important;
    position: relative !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    box-shadow: 0 1px 3px rgba(102, 126, 234, 0.1) !important;
    width: calc(100% - 0.5rem) !important;
}

.new-conversation-card:hover {
    background: rgba(102, 126, 234, 0.08) !important;
    border-style: solid !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 3px 8px rgba(102, 126, 234, 0.2) !important;
}

.new-conversation-card:active {
    transform: translateY(0) !important;
    box-shadow: 0 1px 3px rgba(102, 126, 234, 0.15) !important;
}

.new-conversation-card .session-content {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    height: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
}

.new-conversation-card .session-preview {
    font-size: 14px !important;
    line-height: 20px !important;
    color: var(--primary-color) !important;
    font-weight: 600 !important;
    margin: 0 !important;
    padding: 0 !important;
    text-align: center !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
}

.new-conversation-card:hover .session-preview {
    color: var(--primary-color) !important;
    font-weight: 700 !important;
}

/* Move conversation title icon and text to the right */
.conversation-title {
    margin-left: 1rem !important;
}

/* Conversation Action Strips */
.conversation-action-strip {
    padding: 1rem 1.25rem;
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.conversation-action-strip::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.conversation-action-strip:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    transform: translateX(4px);
}

.conversation-action-strip:hover::before {
    width: 4px;
}

.strip-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.conversation-action-strip:hover .strip-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.strip-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.strip-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
}

.strip-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.2;
}

.strip-arrow {
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.conversation-action-strip:hover .strip-arrow {
    color: var(--primary-color);
    transform: translateX(4px);
}

/* Specific strip styles */
.avatar-strip .strip-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.focus-strip .strip-icon {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.conversation-stats {
    padding: 1rem 1.25rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

/* Minimalistic Strip Design for Session Cards */
.session-card {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0.375rem 0.75rem;
    margin-bottom: 0.125rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-height: 2.25rem;
    border-left: 2px solid transparent;
}

.session-card::before {
    display: none;
}

.session-card:hover {
    background: rgba(102, 126, 234, 0.04);
    border-radius: var(--border-radius-sm);
    border-left-color: var(--primary-color);
}

.session-card.active {
    background: rgba(102, 126, 234, 0.06);
    border-radius: var(--border-radius-sm);
    border-left-color: var(--primary-color);
}

.session-header {
    display: none;
}

.session-icon {
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.65rem;
    flex-shrink: 0;
    opacity: 0.9;
}

.session-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.session-preview {
    font-size: 0.8rem;
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.2;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-card:hover .session-preview {
    color: var(--primary-color);
}

.session-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.65rem;
    color: var(--text-muted);
    margin: 0;
}

.session-time {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-time i {
    color: var(--text-muted);
    font-size: 0.55rem;
}

.session-count {
    background: var(--text-muted);
    color: white;
    padding: 0.125rem 0.4rem;
    border-radius: 0.75rem;
    font-size: 0.55rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.8;
}

.session-count i {
    font-size: 0.5rem;
}

.session-card:hover .session-count {
    background: var(--primary-color);
    opacity: 1;
}

.no-sessions {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.no-sessions i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-sessions h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.no-sessions p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Chat Area */
.chat-section {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    position: relative;
    height: 100vh !important; /* Force full viewport height */
    min-height: 100vh !important;
    overflow: hidden; /* Prevent section overflow */
    z-index: 1; /* Reduce z-index to prevent overlay */
}

.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2V6h4V4H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
    min-height: 0; /* Allow flex item to shrink */
    max-height: 100%; /* Prevent exceeding container */
    scroll-behavior: smooth; /* Add smooth scrolling */
    min-height: 300px; /* Ensures minimum usable height */
}

.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-message .message-avatar {
    background: var(--chat-user-bg);
    color: white;
}

.bot-message .message-avatar {
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
}

/* Bot avatar specific styling for tutoring theme */
.bot-message .message-avatar i {
    font-size: 1rem;
}

.message-bubble {
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    border: 1px solid var(--border-light);
    transition: var(--transition-normal);
}

.user-message .message-bubble {
    background: var(--chat-user-bg);
    color: white;
    border: none;
    border-bottom-right-radius: var(--border-radius-sm);
}

.bot-message .message-bubble {
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-bubble:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.message-content {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 1rem 0 0.5rem 0;
}

.message-content h3 {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message-content a {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    cursor: pointer;
}

.message-content a:hover {
    color: var(--secondary-color) !important;
    text-decoration: none !important;
    background-color: rgba(102, 126, 234, 0.1);
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
}

.user-message .message-content a {
    color: rgba(255, 255, 255, 0.9) !important;
}

.user-message .message-content a:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--text-primary);
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.message-content th,
.message-content td {
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    line-height: 1.5;
}

.message-content th {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message-content td {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.message-content tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.message-content tr:last-child td {
    border-bottom: none;
}

.user-message .message-content table {
    background: rgba(255, 255, 255, 0.1);
}

.user-message .message-content th {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.user-message .message-content td {
    color: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.user-message .message-content tr:hover {
    background: rgba(255, 255, 255, 0.1);
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.7;
}

.user-message .message-timestamp {
    color: rgba(255, 255, 255, 0.8);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0;
    animation: fadeIn 0.3s ease-out;
}

.typing-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.typing-avatar i {
    font-size: 1rem;
}

.typing-bubble {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    border-bottom-left-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 0.25rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0.32s; }

/* Input Area */
.chat-input {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    flex-shrink: 0; /* Prevent input from shrinking */
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    z-index: 100;
    position: relative;
    overflow: visible;
}

.input-wrapper {
    flex: 1;
    position: relative;
    overflow: visible !important;
    z-index: 1000;
}

.message-input {
    width: 100%;
    min-height: 2.75rem;
    max-height: 8rem;
    padding: 0.75rem 1rem 0.75rem 4.5rem !important;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    resize: none;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--surface-color);
    transition: var(--transition-fast);
    outline: none;
}

.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.message-input::placeholder {
    color: var(--text-muted);
}

/* Plus Menu Button */
.plus-menu-button {
    position: absolute;
    left: 0.5rem;
    bottom: 0.5rem;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.plus-menu-button:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.plus-menu-button i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

/* Plus Menu */
.plus-menu {
    position: absolute;
    left: 0.5rem;
    bottom: 3.5rem;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    border: 2px solid #e2e8f0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 9999 !important;
    overflow: visible;
    pointer-events: none;
    display: block;
}

.plus-menu.show {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(0) !important;
    pointer-events: auto !important;
    display: block !important;
}

.plus-menu-item {
    padding: 0.875rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
}

.plus-menu-item:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.plus-menu-item i {
    font-size: 1.1rem;
    color: var(--primary-color);
    width: 1.5rem;
    text-align: center;
}

.plus-menu-item span {
    flex: 1;
}

.plus-menu-item:first-child {
    border-top-left-radius: var(--border-radius-lg);
    border-top-right-radius: var(--border-radius-lg);
}

.plus-menu-item:last-child {
    border-bottom-left-radius: var(--border-radius-lg);
    border-bottom-right-radius: var(--border-radius-lg);
}

/* Video Generation Modal */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.video-modal-content {
    position: relative;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 850px;
    width: 90%;
    max-height: 90vh;
    overflow: hidden;
    animation: slideUp 0.3s ease;
    z-index: 10001;
}

.video-modal-content.video-success-modal {
    max-width: 550px;
}

.video-modal-header.video-success-header {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.video-modal-icon.video-success-icon {
    background: rgba(255, 255, 255, 0.2);
    animation: successPulse 2s ease-in-out infinite;
}

@keyframes successPulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 255, 255, 0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.video-modal-header {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem;
    text-align: center;
    color: white;
}

.video-modal-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem auto;
    font-size: 1.75rem;
}

.video-modal-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.video-modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    font-size: 1.25rem;
    transition: all 0.2s ease;
}

.video-modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

.video-modal-body {
    padding: 2rem;
}

.video-modal-description {
    font-size: 1rem;
    line-height: 1.6;
    color: #4a5568;
    margin: 0 0 1.5rem 0;
}

.video-modal-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.video-feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f8faff 0%, #fff 100%);
    border-radius: 12px;
    border-left: 4px solid #667eea;
}

.video-feature-item i {
    font-size: 1.25rem;
    color: #667eea;
    width: 24px;
    text-align: center;
}

.video-feature-item span {
    font-size: 0.9rem;
    color: #4a5568;
    line-height: 1.5;
}

.video-feature-item strong {
    color: #667eea;
    font-weight: 600;
}

.video-modal-footer {
    padding: 1.5rem 2rem;
    background: #f8faff;
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    border-top: 1px solid #e2e8f0;
    position: sticky;
    bottom: 0;
    z-index: 10;
}

.video-modal-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.video-modal-btn-cancel {
    background: white;
    color: #4a5568;
    border: 2px solid #e2e8f0;
}

.video-modal-btn-cancel:hover {
    background: #f8faff;
    border-color: #cbd5e0;
    transform: translateY(-2px);
}

.video-modal-btn-ok {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.video-modal-btn-ok:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.video-modal-btn-ok:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.video-modal-btn-ok:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Conversation Selection Styles */
.video-selection-body {
    padding: 1.5rem 2rem 0.5rem 2rem;
    max-height: calc(90vh - 300px);
    overflow-y: auto;
    overflow-x: hidden;
}

.selection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #e2e8f0;
}

.selection-counter {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.selection-counter #selectedCount {
    font-size: 1.25rem;
    font-weight: 700;
}

.conversation-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.loading-conversations {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 3rem;
    color: #667eea;
    font-size: 1rem;
}

.loading-conversations i {
    font-size: 1.5rem;
}

.conversation-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.conversation-item:hover {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
    transform: translateX(4px);
}

.conversation-item.selected {
    border-color: #10b981;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(255, 255, 255, 1) 100%);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.conversation-checkbox {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border: 2px solid #cbd5e0;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    background: white;
}

.conversation-item:hover .conversation-checkbox {
    border-color: #667eea;
}

.conversation-item.selected .conversation-checkbox {
    background: #10b981;
    border-color: #10b981;
}

.conversation-checkbox i {
    color: white;
    font-size: 0.875rem;
    display: none;
}

.conversation-item.selected .conversation-checkbox i {
    display: block;
}

.conversation-content {
    flex: 1;
}

.conversation-role {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.role-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.role-badge.user {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.role-badge.assistant {
    background: rgba(139, 92, 246, 0.1);
    color: #8b5cf6;
}

.conversation-text {
    color: #4a5568;
    line-height: 1.6;
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.conversation-timestamp {
    font-size: 0.75rem;
    color: #9ca3af;
    margin-top: 0.5rem;
}

.conversation-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.conversation-item.disabled:hover {
    border-color: #e2e8f0;
    box-shadow: none;
    transform: none;
}

.no-conversations {
    text-align: center;
    padding: 3rem;
    color: #9ca3af;
}

.no-conversations i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #cbd5e0;
}

.send-button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.send-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.send-button:active {
    transform: translateY(0) scale(0.98);
}

/* Microphone Button */
.microphone-button {
    background: var(--surface-color);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.microphone-button:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.microphone-button:active,
.microphone-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.microphone-button.recording {
    background: var(--primary-gradient);
    color: #fff;
    border-color: var(--primary-gradient);
    animation: pulse 1.2s infinite;
}

/* Microphone Button: processing state */
.microphone-button.processing {
    background: var(--surface-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
    position: relative;
    opacity: 0.9;
}
.microphone-button.processing i {
    animation: none; /* rely on fa-spin */
}
.microphone-button.processing:disabled {
    cursor: not-allowed;
}

/* Cancel chip shown while processing */
.stt-cancel-chip {
    background: rgba(0,0,0,0.06);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    height: 2rem;
    border-radius: 1rem;
    padding: 0 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    transition: var(--transition-fast);
}
.stt-cancel-chip i { font-size: 0.85rem; }
.stt-cancel-chip:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

/* TTS Button */
.tts-button {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    opacity: 0;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.message:hover .tts-button {
    opacity: 1;
}

.tts-button:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.tts-button:active,
.tts-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

.tts-button.playing {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Make message bubbles relative for TTS button positioning */
.message-bubble {
    position: relative;
}

/* Voice Chat Button Styles */
#liveVoiceChatBtn {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

#liveVoiceChatBtn:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#liveVoiceChatBtn:active,
#liveVoiceChatBtn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

#liveVoiceChatBtn.active {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Right Panel - Suggestions & Actions */
.suggestions-panel {
    background: var(--surface-color);
    border-left: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 0;
}

.panel-header {
    padding: 1.5rem 1.5rem 0;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    flex-shrink: 0;
    top: 0;
    z-index: 10;
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.panel-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    line-height: 1.5;
}

.panel-content {
    padding: 1.5rem;
    flex: 1;
}

.panel-section {
    margin-bottom: 1.5rem;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.panel-section:last-child {
    margin-bottom: 0;
}

.panel-section.collapsed {
    margin-bottom: 0.75rem;
}

.section-header {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.section-header:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
}

.panel-section.collapsed .section-header {
    border-bottom: none;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
}

.section-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.panel-section.collapsed .section-icon {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

.section-info {
    flex: 1;
    min-width: 0;
}

.section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.panel-section.collapsed .section-title {
    font-size: 0.85rem;
    margin: 0;
}

.section-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.panel-section.collapsed .section-subtitle {
    font-size: 0.65rem;
}

.section-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.panel-section.collapsed .section-toggle {
    transform: rotate(-90deg);
}

.section-content {
    padding: 1.25rem;
    transition: var(--transition-normal);
    max-height: 1000px;
    opacity: 1;
}

.panel-section.collapsed .section-content {
    max-height: 0;
    padding: 0 1.25rem;
    opacity: 0;
    overflow: hidden;
}

.section-summary {
    display: none;
    padding: 0.5rem 1rem 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.panel-section.collapsed .section-summary {
    display: block;
}

/* Suggestion Cards */
.suggestion-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

.suggestion-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.suggestion-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.suggestion-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.suggestion-card:hover::before {
    height: 4px;
}

.suggestion-card.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-color: var(--primary-color);
}

.suggestion-card.featured::before {
    height: 4px;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.suggestion-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.card-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    gap: 0.75rem;
}

.action-item {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.action-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.action-item:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-color: var(--primary-color);
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.action-item:hover::before {
    width: 4px;
}

.action-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.action-content {
    flex: 1;
}

.action-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
}

.action-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0.25rem 0 0 0;
    line-height: 1.4;
}

.action-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: auto;
    box-shadow: var(--shadow-sm);
}

/* Agent Cards */
.agent-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.agent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.agent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.agent-card:hover::before {
    opacity: 1;
}

.agent-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.agent-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.agent-info {
    flex: 1;
}

.agent-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.agent-role {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.agent-status {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1.5rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 1;
    white-space: nowrap;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.agent-status i {
    font-size: 0.75rem;
    animation: pulse 2s infinite;
}

.agent-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    position: relative;
    z-index: 1;
}

.agent-features {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.feature-tag {
    background: var(--border-light);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Specific Agent Colors */
.agent-card.roleplay .agent-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.agent-card.assessment .agent-avatar {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.agent-card.scoring .agent-avatar {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.agent-card.knowledge .agent-avatar {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.agent-card.content .agent-avatar {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.agent-card.certificate .agent-avatar {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

/* Forms */
.form-container {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
    animation: fadeInUp 0.4s ease-out;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 100;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    transition: var(--transition-fast);
    background: var(--surface-color);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-button {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.form-button:active {
    transform: translateY(0);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
        width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--surface-elevated);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.4s ease-out;
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 0.5rem 0;
}

.modal-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.error-message {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    margin-top: 1rem;
        display: flex;
        align-items: center;
    gap: 0.5rem;
    border-left: 4px solid #dc2626;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: 320px 1fr 380px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 380px;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 300px 1fr 350px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 350px;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }
    
    .conversation-panel,
    .suggestions-panel {
        display: none;
    }
    
    .nav-instance {
        padding: 1rem;
    }
    
    .chat-messages {
        padding: 1rem;
    }
    
    .chat-input {
        padding: 1rem;
    }

    /* Avatar chat panel responsive */
    .avatar-chat-panel {
        width: 100%;
        right: -100%;
    }

    .avatar-chat-panel.open {
        right: 0;
    }

    .avatar-grid {
        grid-template-columns: 1fr;
    }

    .avatar-video {
        height: 50vh;
    }
}

@media (max-width: 768px) {
    .nav-instance {
        padding: 0.75rem;
    }
    
    .nav-title {
        font-size: 1.1rem;
    }
    
    .chat-header {
        padding: 1rem;
    }
    
    .chat-title h3 {
        font-size: 1.25rem;
    }
    
    .chat-subtitle {
        display: none;
    }
    
    .message {
        max-width: 95%;
    }
    
    .chat-messages {
        padding: 1rem;
        gap: 1rem;
    }

    /* Hide avatar chat button text on very small screens */
    .avatar-chat-btn span {
        display: none;
    }

    .avatar-chat-btn {
        padding: 0.5rem;
        margin-left: 0.5rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.visible {
        display: block !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

.bounce-in {
    animation: bounce 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Focus States */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive Design for Split Layout */
@media (max-width: 1024px) {
    .chat-messages.avatar-active {
        flex-direction: column;
    }

    .avatar-video-section,
    .links-preview-section {
        width: 100%;
    }

    .avatar-video-section {
        height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }

    .links-preview-section {
        border-left: none;
        border-top: 1px solid var(--border-light);
    }

    .avatar-grid-main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Chat Header */
.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Avatar Chat Button */
.avatar-chat-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(10px);
    margin-left: 1rem;
}

.avatar-chat-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.avatar-chat-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-chat-btn:disabled:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: none;
    box-shadow: none;
}

.avatar-chat-btn i {
    font-size: 1rem;
}

/* Avatar Chat Panel */
.avatar-chat-panel {
    position: fixed;
    top: 0;
    right: -500px;
    width: 500px;
    height: 100vh;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: horizontal;
    min-width: 400px;
    max-width: 600px;
}

.avatar-chat-panel.open {
    right: 0;
}

/* Transformed Chat Messages Area */
.chat-messages.avatar-mode {
    display: flex;
    flex-direction: column;
    padding: 0;
    background: var(--surface-color);
}

.avatar-selection-container {
    padding: 2rem;
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--border-light);
    text-align: center;
}

.avatar-selection-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.avatar-selection-container p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0 0 2rem 0;
}

.avatar-grid-main {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.avatar-option-main {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option-main:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option-main.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-image-main {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-image-main {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected .avatar-image-main {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name-main {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-name-main {
    color: var(--primary-color);
}

.avatar-option-main.selected .avatar-name-main {
    color: var(--primary-color);
}

/* Split Layout for Avatar + Chat */
.chat-messages.avatar-active {
    display: flex;
    flex-direction: row;
    padding: 0;
    background: var(--surface-color);
}

.avatar-video-section {
    width: 50%;
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: relative;
}

.avatar-video-main {
    flex: 1;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin: 1rem;
    box-shadow: var(--shadow-md);
}

.avatar-video-main video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls-main {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group-main {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input-main {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input-main:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn-main {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn-main:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn-main:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.chat-content-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
}

.chat-messages-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
}

.chat-input-section {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Links Preview Section */
.links-preview-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
}

.links-preview-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
}

.links-preview-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.links-preview-header h3::before {
    content: '\f0c1';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
}

.links-preview-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.links-preview-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.no-links-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.no-links-message i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-links-message p {
    font-size: 0.875rem;
    margin: 0;
}

.link-item {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.link-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.link-item:last-child {
    margin-bottom: 0;
}

.link-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.link-url {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin: 0;
    word-break: break-all;
    font-family: monospace;
}

.link-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.avatar-status-main {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.avatar-status-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator-main {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator-main.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator-main.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator-main.error {
    background: var(--danger-color);
}

/* Back to Chat Button */
.back-to-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.back-to-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.back-to-chat-btn i {
    font-size: 0.875rem;
}

/* Resize handle for avatar panel */
.avatar-resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    cursor: ew-resize;
    opacity: 0;
    transition: var(--transition-fast);
}

.avatar-chat-panel:hover .avatar-resize-handle {
    opacity: 1;
}

.avatar-resize-handle:hover {
    opacity: 1;
    background: var(--secondary-color);
}

.avatar-chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.avatar-chat-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar-chat-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.avatar-chat-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.avatar-chat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-selection {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.avatar-selection h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.avatar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.avatar-option {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-option::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.avatar-option:hover::after {
    opacity: 1;
}

.avatar-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-image {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected .avatar-image {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-name {
    color: var(--primary-color);
}

.avatar-option.selected .avatar-name {
    color: var(--primary-color);
}

.avatar-chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-video-container {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.avatar-video {
    width: 100%;
    height: 650px;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
}

.avatar-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-status {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator.error {
    background: var(--danger-color);
}

/* Assessment styles */
.assessment-container {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.assessment-container:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.assessment-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.assessment-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.assessment-results {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--border-light);
    border-radius: var(--border-radius-lg);
}

.assessment-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.assessment-results-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-results-score {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.assessment-results-summary {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-results-feedback {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

.assessment-question {
    margin-bottom: 1rem;
}

.assessment-question-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.assessment-question-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.assessment-question-evaluation {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.assessment-question-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-md);
    margin-left: 0.5rem;
}

.assessment-question-status.correct {
    background: var(--success-color);
    color: white;
}

.assessment-question-status.incorrect {
    background: var(--danger-color);
    color: white;
}

.assessment-question-status.skipped {
    background: var(--warning-color);
    color: white;
}

.assessment-question-points {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.assessment-question-score {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.assessment-question-correct-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-correct-answer span {
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-question-user-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-user-answer span {
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-question-explanation {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-explanation p {
    margin: 0;
}

.assessment-question-explanation ul,
.assessment-question-explanation ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.assessment-question-explanation li {
    margin-bottom: 0.25rem;
}

.assessment-question-explanation code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
}

.assessment-question-explanation a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.assessment-question-explanation a:hover {
    text-decoration: underline;
}

/* Assessment Evaluation Bubble Styling */
.assessment-bubble {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.assessment-message .message-avatar {
    background: var(--primary-gradient);
    color: white;
}

.assessment-interface-wrapper {
    min-height: 200px;
}

/* Assessment Results Styling */
.assessment-results {
    padding: 1.5rem;
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
}

.assessment-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.assessment-results-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.assessment-results-score {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.assessment-question-item {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-md);
    padding: 1rem;
    margin-bottom: 1rem;
}

.assessment-question-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.assessment-answer-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.assessment-answer-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.assessment-answer-value {
    color: var(--text-primary);
}

.assessment-score-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.assessment-score-badge.correct {
    background: var(--success-color);
    color: white;
}

.assessment-score-badge.incorrect {
    background: #ef4444;
    color: white;
}

.assessment-evaluation-text {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: rgba(102, 126, 234, 0.05);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--primary-color);
}

.assessment-summary {
    background: var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.assessment-summary h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.assessment-summary p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Responsive Design for Small Viewports */
@media (max-height: 600px) {
    .main-layout {
        height: calc(100vh - 60px);
    }
    
    .chat-messages {
        min-height: 200px;
        padding: 1rem;
    }
    
    .chat-header {
        padding: 0.5rem 1.5rem;
    }
    
    .chat-input {
        padding: 1rem 1.5rem;
    }
}

@media (max-height: 400px) {
    .chat-messages {
        min-height: 150px;
        padding: 0.5rem;
        gap: 1rem;
    }
    .chat-header {
        padding: 0.25rem 1rem;
    }
    
    .chat-input {
        padding: 0.75rem 1rem 0.75rem 4.5rem;
    }
}

/* Enhanced responsive design for better split screen and window resize support */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: 300px 1fr !important; /* hide right panel */
    }
    .suggestions-panel {
        display: none !important;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 280px 1fr !important; /* hide right panel */
    }
    .suggestions-panel {
        display: none !important;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr !important;
        grid-template-rows: 1fr !important;
    }
    
    .conversation-panel {
        display: none !important;
    }
    
    .suggestions-panel {
        display: none !important;
    }
}

@media (max-width: 900px) {
    .main-layout {
        grid-template-columns: 1fr !important;
        grid-template-rows: 1fr !important;
    }
    
    .conversation-panel,
    .suggestions-panel {
        display: none !important;
    }
}

/* Better handling of very small screens */
@media (max-width: 480px) {
    .main-layout {
        height: calc(100vh - 60px) !important;
    }
    
    .nav-instance {
        padding: 0.5rem 1rem !important;
    }
    
    .chat-messages {
        padding: 0.5rem !important;
    }
    
    .chat-input {
        padding: 0.5rem !important;
    }
}

/* Enhanced input positioning fixes for all screen sizes */
.chat-section {
    position: relative;
    min-height: 0; /* Important for flex child */
    height: 100%;
}

/* CRITICAL: Enhanced Chat Layout - Fixed Input Positioning */
.chat-section {
    display: flex !important;
    flex-direction: column !important;
    height: 100% !important;
    min-height: 0 !important;
    position: relative !important;
    overflow: hidden !important;
}

.chat-header {
    flex-shrink: 0 !important;
    position: relative !important;
    z-index: 10 !important;
}

.chat-messages {
    flex: 1 !important;
    overflow-y: auto !important;
    min-height: 0 !important;
    position: relative !important;
    z-index: 1 !important;
    padding-bottom: 1rem !important; /* Add padding to prevent content from being hidden behind input */
}

.chat-input {
    flex-shrink: 0 !important;
    position: relative !important;
    z-index: 100 !important;
    background: var(--surface-elevated) !important;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1) !important;
    margin-top: 0 !important;
    bottom: 0 !important;
}

/* Force proper layout at all screen sizes and orientations */
@media screen and (min-width: 1px) {
    .main-layout {
        display: grid !important;
        height: calc(100vh - 80px) !important;
        min-height: calc(100vh - 80px) !important;
    }
    
    .chat-section {
        display: flex !important;
        flex-direction: column !important;
        height: 100% !important;
        min-height: 0 !important;
    }
    
    .chat-messages {
        flex: 1 !important;
        overflow-y: auto !important;
        min-height: 0 !important;
    }
    
    .chat-input {
        flex-shrink: 0 !important;
        position: relative !important;
    }
}

/* Responsive layout fixes */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: 300px 1fr !important;
    }
    .chat-section {
        height: 100% !important;
        display: flex !important;
        flex-direction: column !important;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 280px 1fr !important;
    }
    .chat-section {
        height: 100% !important;
        display: flex !important;
        flex-direction: column !important;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr !important;
    }
    .chat-section {
        height: 100% !important;
        display: flex !important;
        flex-direction: column !important;
    }
}

@media (max-width: 900px) {
    .main-layout {
        grid-template-columns: 1fr !important;
    }
    .chat-section {
        height: 100% !important;
        display: flex !important;
        flex-direction: column !important;
    }
}

/* Handle window resizing and viewport changes */
@media (orientation: portrait) {
    .chat-section {
        display: flex !important;
        flex-direction: column !important;
        height: 100% !important;
    }
    
    .chat-messages {
        flex: 1 !important;
        overflow-y: auto !important;
        min-height: 0 !important;
    }
    
    .chat-input {
        flex-shrink: 0 !important;
        position: relative !important;
    }
}

@media (orientation: landscape) {
    .chat-section {
        display: flex !important;
        flex-direction: column !important;
        height: 100% !important;
    }
    
    .chat-messages {
        flex: 1 !important;
        overflow-y: auto !important;
        min-height: 0 !important;
    }
    
    .chat-input {
        flex-shrink: 0 !important;
        position: relative !important;
    }
}

/* Handle split screen scenarios */
@media (max-width: 768px) {
    .chat-section {
        display: flex !important;
        flex-direction: column !important;
        height: 100% !important;
    }
    
    .chat-messages {
        flex: 1 !important;
        overflow-y: auto !important;
        min-height: 0 !important;
    }
    
    .chat-input {
        flex-shrink: 0 !important;
        position: relative !important;
    }
}

/* Ensure input stays at bottom during window resize */
@media (max-height: 600px) {
    .chat-section {
        display: flex !important;
        flex-direction: column !important;
        height: 100% !important;
    }
    
    .chat-messages {
        flex: 1 !important;
        overflow-y: auto !important;
        min-height: 0 !important;
    }
    
    .chat-input {
        flex-shrink: 0 !important;
        position: relative !important;
    }
}

/* Quick Action Cards */
.quick-action-cards-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    margin: 2rem 0;
    background: transparent;
    min-height: 400px;
    animation: fadeInUp 0.6s ease-out;
}



.quick-action-cards-header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 600px;
}

.quick-action-cards-header h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.3;
}

.quick-action-cards-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
    font-weight: 400;
}

.quick-action-cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    width: 100%;
    max-width: 700px;
}

.quick-action-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(102, 126, 234, 0.1);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.08);
    min-height: 120px;
}

.quick-action-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.quick-action-card:hover {
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--primary-color);
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.15);
}

.quick-action-card:hover::before {
    opacity: 1;
}

.quick-action-card:active {
    transform: translateY(-2px) scale(1.01);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.12);
}

.quick-action-icon {
    width: 70px;
    height: 70px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: var(--transition-normal);
    position: relative;
    z-index: 2;
}

.quick-action-card:hover .quick-action-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.quick-action-content {
    flex: 1;
    position: relative;
    z-index: 2;
}

.quick-action-content h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.75rem 0;
    line-height: 1.3;
    transition: var(--transition-fast);
}

.quick-action-card:hover .quick-action-content h4 {
    color: var(--primary-color);
}

.quick-action-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
    font-weight: 400;
}

.quick-action-arrow {
    width: 40px;
    height: 40px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.1rem;
    flex-shrink: 0;
    transition: var(--transition-normal);
    position: relative;
    z-index: 2;
}

.quick-action-card:hover .quick-action-arrow {
    background: var(--primary-color);
    color: white;
    transform: translateX(6px) scale(1.1);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Responsive design for quick action cards */
@media (max-width: 768px) {
    .quick-action-cards-container {
        padding: 2rem 1rem;
        min-height: 300px;
    }
    
    .quick-action-cards-header h3 {
        font-size: 1.5rem;
    }
    
    .quick-action-cards-header p {
        font-size: 1rem;
    }
    
    .quick-action-card {
        padding: 1.5rem;
        flex-direction: column;
        text-align: center;
        gap: 1rem;
        min-height: auto;
    }
    
    .quick-action-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin: 0 auto;
    }
    
    .quick-action-arrow {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .quick-action-card:hover .quick-action-arrow {
        transform: translateY(-6px) scale(1.1);
    }
}

@media (max-width: 480px) {
    .quick-action-cards-container {
        padding: 1.5rem 0.75rem;
    }
    
    .quick-action-cards-grid {
        gap: 1rem;
    }
    
    .quick-action-card {
        padding: 1.25rem;
    }
    
    .quick-action-cards-header h3 {
        font-size: 1.35rem;
    }
    
    .quick-action-content h4 {
        font-size: 1.1rem;
    }
    
    .quick-action-content p {
        font-size: 0.9rem;
    }
    
    /* Stack cards vertically on mobile */
    .quick-action-cards-grid {
        grid-template-columns: 1fr !important;
        gap: 0.75rem !important;
    }
    
    .quick-action-card {
        min-height: 120px !important;
    }
    
    /* Mini cards responsive design */
    .mini-quick-cards-container {
        padding: 0.75rem 1rem 0.5rem !important;
    }
    
    .mini-quick-cards-grid {
        flex-direction: column !important;
        gap: 0.5rem !important;
    }
    
    .mini-quick-card {
        max-width: none !important;
        min-width: auto !important;
        width: 100% !important;
        justify-content: flex-start !important;
        text-align: left !important;
    }
    
    .mini-quick-card span {
        white-space: normal !important;
        overflow: visible !important;
        text-overflow: initial !important;
    }
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    margin: 0;
    height: 100vh;
    background: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
    40%, 43% { transform: translate3d(0, -8px, 0); }
    70% { transform: translate3d(0, -4px, 0); }
    90% { transform: translate3d(0, -2px, 0); }
}

/* Navigation */
.nav-instance {
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    position: relative;
    flex-shrink: 0;
    top: 0;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: 40px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.nav-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.ai-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.user-welcome:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    border: 2px solid white;
}

.welcome-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: 352px 1fr 420px;
    height: calc(100vh - 80px);
    gap: 0;
    transition: var(--transition-normal);
}

.main-layout.collapsed {
    grid-template-columns: 60px 1fr 420px;
}

/* Conversation History Panel */
.conversation-panel {
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.main-layout.collapsed .conversation-panel {
    width: 60px;
}

.main-layout.collapsed .conversation-panel .conversation-content {
    display: none;
}

.main-layout.collapsed .conversation-panel .conversation-toggle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.conversation-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-normal);
}

.conversation-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    position: relative;
    padding-left: 3.5rem; /* Make room for toggle button on the left */
}

.conversation-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.3;
}

.conversation-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.conversation-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.conversation-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.conversation-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    z-index: 100;
}

.main-layout.collapsed .conversation-toggle {
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.collapsed .conversation-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.new-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-chat-btn i {
    font-size: 1rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    background: linear-gradient(180deg, var(--surface-color) 0%, var(--background-color) 100%);
}

.conversation-stats {
    padding: 1rem 1.25rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

.session-card {
    background: var(--surface-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.session-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.session-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.session-card:hover::before {
    width: 4px;
}

.session-card.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    box-shadow: var(--shadow-md);
}

.session-card.active::before {
    width: 4px;
}

.session-header {
    display: flex;
    align-items: center;
    justify-content: between;
    margin-bottom: 0.75rem;
}

.session-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    margin-right: 1rem;
    box-shadow: var(--shadow-sm);
}

.session-preview {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 500;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
}

.session-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-time i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.session-count {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-count i {
    font-size: 0.75rem;
}

.no-sessions {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.no-sessions i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-sessions h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.no-sessions p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Chat Area */
.chat-section {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    position: relative;
}

.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
    min-height: 0; /* Allow flex item to shrink */
    max-height: 100%; /* Prevent exceeding container */
    scroll-behavior: smooth; /* Add smooth scrolling */
    min-height: 300px; /* Ensures minimum usable height */
}

.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-message .message-avatar {
    background: var(--chat-user-bg);
    color: white;
}

.bot-message .message-avatar {
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
}

/* Bot avatar specific styling for tutoring theme */
.bot-message .message-avatar i {
    font-size: 1rem;
}

.message-bubble {
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.user-message .message-bubble {
    background: var(--chat-user-bg);
    color: white;
    border: none;
    border-bottom-right-radius: var(--border-radius-sm);
}

.bot-message .message-bubble {
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-bubble:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.message-content {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 1rem 0 0.5rem 0;
}

.message-content h3 {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message-content a {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    cursor: pointer;
}

.message-content a:hover {
    color: var(--secondary-color) !important;
    text-decoration: none !important;
    background-color: rgba(102, 126, 234, 0.1);
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
}

.user-message .message-content a {
    color: rgba(255, 255, 255, 0.9) !important;
}

.user-message .message-content a:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
}

.nav-instance {
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    position: relative;
    flex-shrink: 0;
    top: 0;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: 40px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.nav-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.ai-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.user-welcome:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    border: 2px solid white;
}

.welcome-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: 352px 1fr 420px;
    height: calc(100vh - 80px);
    gap: 0;
    transition: var(--transition-normal);
}

.main-layout.collapsed {
    grid-template-columns: 60px 1fr 420px;
}

/* Conversation History Panel */
.conversation-panel {
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.main-layout.collapsed .conversation-panel {
    width: 60px;
}

.main-layout.collapsed .conversation-panel .conversation-content {
    display: none;
}

.main-layout.collapsed .conversation-panel .conversation-toggle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.conversation-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-normal);
}

.conversation-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    position: relative;
    padding-left: 3.5rem; /* Make room for toggle button on the left */
}

.conversation-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.3;
}

.conversation-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.conversation-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.conversation-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.conversation-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    z-index: 100;
}

.main-layout.collapsed .conversation-toggle {
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.collapsed .conversation-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.new-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-chat-btn i {
    font-size: 1rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    background: linear-gradient(180deg, var(--surface-color) 0%, var(--background-color) 100%);
}

.conversation-stats {
    padding: 1rem 1.25rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

.session-card {
    background: var(--surface-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.session-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.session-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.session-card:hover::before {
    width: 4px;
}

.session-card.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    box-shadow: var(--shadow-md);
}

.session-card.active::before {
    width: 4px;
}

.session-header {
    display: flex;
    align-items: center;
    justify-content: between;
    margin-bottom: 0.75rem;
}

.session-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    margin-right: 1rem;
    box-shadow: var(--shadow-sm);
}

.session-preview {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 500;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
}

.session-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-time i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.session-count {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-count i {
    font-size: 0.75rem;
}

.no-sessions {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.no-sessions i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-sessions h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.no-sessions p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Chat Area */
.chat-section {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    position: relative;
}

.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
    min-height: 0; /* Allow flex item to shrink */
    max-height: 100%; /* Prevent exceeding container */
    scroll-behavior: smooth; /* Add smooth scrolling */
    min-height: 300px; /* Ensures minimum usable height */
}

.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-message .message-avatar {
    background: var(--chat-user-bg);
    color: white;
}

.bot-message .message-avatar {
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
}

/* Bot avatar specific styling for tutoring theme */
.bot-message .message-avatar i {
    font-size: 1rem;
}

.message-bubble {
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.user-message .message-bubble {
    background: var(--chat-user-bg);
    color: white;
    border: none;
    border-bottom-right-radius: var(--border-radius-sm);
}

.bot-message .message-bubble {
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-bubble:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.message-content {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 1rem 0 0.5rem 0;
}

.message-content h3 {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message-content a {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    cursor: pointer;
}

.message-content a:hover {
    color: var(--secondary-color) !important;
    text-decoration: none !important;
    background-color: rgba(102, 126, 234, 0.1);
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
}

.user-message .message-content a {
    color: rgba(255, 255, 255, 0.9) !important;
}

.user-message .message-content a:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--text-primary);
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.message-content th,
.message-content td {
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    line-height: 1.5;
}

.message-content th {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message-content td {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.message-content tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.message-content tr:last-child td {
    border-bottom: none;
}

.user-message .message-content table {
    background: rgba(255, 255, 255, 0.1);
}

.user-message .message-content th {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.user-message .message-content td {
    color: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.user-message .message-content tr:hover {
    background: rgba(255, 255, 255, 0.1);
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.7;
}

.user-message .message-timestamp {
    color: rgba(255, 255, 255, 0.8);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0;
    animation: fadeIn 0.3s ease-out;
}

.typing-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.typing-avatar i {
    font-size: 1rem;
}

.typing-bubble {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    border-bottom-left-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 0.25rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0.32s; }

/* Input Area */
.chat-input {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.message-input {
    width: 100%;
    min-height: 2.75rem;
    max-height: 8rem;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    resize: none;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--surface-color);
    transition: var(--transition-fast);
    outline: none;
}

.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.message-input::placeholder {
    color: var(--text-muted);
}

.send-button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.send-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.send-button:active {
    transform: translateY(0) scale(0.98);
}

/* Microphone Button */
.microphone-button {
    background: var(--surface-color);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.microphone-button:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.microphone-button:active,
.microphone-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.microphone-button.recording {
    background: var(--primary-gradient);
    color: #fff;
    border-color: var(--primary-gradient);
    animation: pulse 1.2s infinite;
}

/* TTS Button */
.tts-button {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    opacity: 0;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.message:hover .tts-button {
    opacity: 1;
}

.tts-button:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.tts-button:active,
.tts-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

.tts-button.playing {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Make message bubbles relative for TTS button positioning */
.message-bubble {
    position: relative;
}

/* Voice Chat Button Styles */
#liveVoiceChatBtn {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

#liveVoiceChatBtn:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#liveVoiceChatBtn:active,
#liveVoiceChatBtn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

#liveVoiceChatBtn.active {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Right Panel - Suggestions & Actions */
.suggestions-panel {
    background: var(--surface-color);
    border-left: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 0;
}

.panel-header {
    padding: 1.5rem 1.5rem 0;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    flex-shrink: 0;
    top: 0;
    z-index: 10;
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.panel-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    line-height: 1.5;
}

.panel-content {
    padding: 1.5rem;
    flex: 1;
}

.panel-section {
    margin-bottom: 1.5rem;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.panel-section:last-child {
    margin-bottom: 0;
}

.panel-section.collapsed {
    margin-bottom: 0.75rem;
}

.section-header {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.section-header:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
}

.panel-section.collapsed .section-header {
    border-bottom: none;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
}

.section-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.panel-section.collapsed .section-icon {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

.section-info {
    flex: 1;
    min-width: 0;
}

.section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.panel-section.collapsed .section-title {
    font-size: 0.85rem;
    margin: 0;
}

.section-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.panel-section.collapsed .section-subtitle {
    font-size: 0.65rem;
}

.section-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.panel-section.collapsed .section-toggle {
    transform: rotate(-90deg);
}

.section-content {
    padding: 1.25rem;
    transition: var(--transition-normal);
    max-height: 1000px;
    opacity: 1;
}

.panel-section.collapsed .section-content {
    max-height: 0;
    padding: 0 1.25rem;
    opacity: 0;
    overflow: hidden;
}

.section-summary {
    display: none;
    padding: 0.5rem 1rem 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.panel-section.collapsed .section-summary {
    display: block;
}

/* Suggestion Cards */
.suggestion-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

.suggestion-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.suggestion-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.suggestion-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.suggestion-card:hover::before {
    height: 4px;
}

.suggestion-card.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-color: var(--primary-color);
}

.suggestion-card.featured::before {
    height: 4px;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.suggestion-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.card-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    gap: 0.75rem;
}

.action-item {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.action-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.action-item:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-color: var(--primary-color);
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.action-item:hover::before {
    width: 4px;
}

.action-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.action-content {
    flex: 1;
}

.action-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
}

.action-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0.25rem 0 0 0;
    line-height: 1.4;
}

.action-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: auto;
    box-shadow: var(--shadow-sm);
}

/* Agent Cards */
.agent-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.agent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.agent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.agent-card:hover::before {
    opacity: 1;
}

.agent-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.agent-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.agent-info {
    flex: 1;
}

.agent-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.agent-role {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.agent-status {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1.5rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 1;
    white-space: nowrap;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.agent-status i {
    font-size: 0.75rem;
    animation: pulse 2s infinite;
}

.agent-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    position: relative;
    z-index: 1;
}

.agent-features {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.feature-tag {
    background: var(--border-light);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Specific Agent Colors */
.agent-card.roleplay .agent-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.agent-card.assessment .agent-avatar {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.agent-card.scoring .agent-avatar {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.agent-card.knowledge .agent-avatar {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.agent-card.content .agent-avatar {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.agent-card.certificate .agent-avatar {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

/* Forms */
.form-container {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
    animation: fadeInUp 0.4s ease-out;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 100;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    transition: var(--transition-fast);
    background: var(--surface-color);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-button {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.form-button:active {
    transform: translateY(0);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
        width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--surface-elevated);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.4s ease-out;
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 0.5rem 0;
}

.modal-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.error-message {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    margin-top: 1rem;
        display: flex;
        align-items: center;
    gap: 0.5rem;
    border-left: 4px solid #dc2626;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: 320px 1fr 380px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 380px;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 300px 1fr 350px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 350px;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }
    
    .conversation-panel,
    .suggestions-panel {
        display: none;
    }
    
    .nav-instance {
        padding: 1rem;
    }
    
    .chat-messages {
        padding: 1rem;
    }
    
    .chat-input {
        padding: 1rem;
    }

    /* Avatar chat panel responsive */
    .avatar-chat-panel {
        width: 100%;
        right: -100%;
    }

    .avatar-chat-panel.open {
        right: 0;
    }

    .avatar-grid {
        grid-template-columns: 1fr;
    }

    .avatar-video {
        height: 50vh;
    }
}

@media (max-width: 768px) {
    .nav-instance {
        padding: 0.75rem;
    }
    
    .nav-title {
        font-size: 1.1rem;
    }
    
    .chat-header {
        padding: 1rem;
    }
    
    .chat-title h3 {
        font-size: 1.25rem;
    }
    
    .chat-subtitle {
        display: none;
    }
    
    .message {
        max-width: 95%;
    }
    
    .chat-messages {
        padding: 1rem;
        gap: 1rem;
    }

    /* Hide avatar chat button text on very small screens */
    .avatar-chat-btn span {
        display: none;
    }

    .avatar-chat-btn {
        padding: 0.5rem;
        margin-left: 0.5rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.visible {
        display: block !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

.bounce-in {
    animation: bounce 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Focus States */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive Design for Split Layout */
@media (max-width: 1024px) {
    .chat-messages.avatar-active {
        flex-direction: column;
    }

    .avatar-video-section,
    .links-preview-section {
        width: 100%;
    }

    .avatar-video-section {
        height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }

    .links-preview-section {
        border-left: none;
        border-top: 1px solid var(--border-light);
    }

    .avatar-grid-main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Chat Header */
.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2V6h4V4H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Avatar Chat Button */
.avatar-chat-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(10px);
    margin-left: 1rem;
}

.avatar-chat-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.avatar-chat-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-chat-btn:disabled:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: none;
    box-shadow: none;
}

.avatar-chat-btn i {
    font-size: 1rem;
}

/* Avatar Chat Panel */
.avatar-chat-panel {
    position: fixed;
    top: 0;
    right: -500px;
    width: 500px;
    height: 100vh;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: horizontal;
    min-width: 400px;
    max-width: 800px;
}

.avatar-chat-panel.open {
    right: 0;
}

/* Transformed Chat Messages Area */
.chat-messages.avatar-mode {
    display: flex;
    flex-direction: column;
    padding: 0;
    background: var(--surface-color);
}

.avatar-selection-container {
    padding: 2rem;
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--border-light);
    text-align: center;
}

.avatar-selection-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.avatar-selection-container p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0 0 2rem 0;
}

.avatar-grid-main {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.avatar-option-main {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option-main:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option-main.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-image-main {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-image-main {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected .avatar-image-main {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name-main {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-name-main {
    color: var(--primary-color);
}

.avatar-option-main.selected .avatar-name-main {
    color: var(--primary-color);
}

/* Split Layout for Avatar + Chat */
.chat-messages.avatar-active {
    display: flex;
    flex-direction: row;
    padding: 0;
    background: var(--surface-color);
}

.avatar-video-section {
    width: 50%;
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: relative;
}

.avatar-video-main {
    flex: 1;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin: 1rem;
    box-shadow: var(--shadow-md);
}

.avatar-video-main video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls-main {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group-main {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input-main {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input-main:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn-main {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn-main:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn-main:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.chat-content-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
}

.chat-messages-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
}

.chat-input-section {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Links Preview Section */
.links-preview-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
}

.links-preview-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
}

.links-preview-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.links-preview-header h3::before {
    content: '\f0c1';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
}

.links-preview-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.links-preview-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.no-links-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.no-links-message i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-links-message p {
    font-size: 0.875rem;
    margin: 0;
}

.link-item {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.link-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.link-item:last-child {
    margin-bottom: 0;
}

.link-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.link-url {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin: 0;
    word-break: break-all;
    font-family: monospace;
}

.link-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.avatar-status-main {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.avatar-status-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator-main {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator-main.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator-main.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator-main.error {
    background: var(--danger-color);
}

/* Back to Chat Button */
.back-to-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.back-to-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.back-to-chat-btn i {
    font-size: 0.875rem;
}

/* Resize handle for avatar panel */
.avatar-resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    cursor: ew-resize;
    opacity: 0;
    transition: var(--transition-fast);
}

.avatar-chat-panel:hover .avatar-resize-handle {
    opacity: 1;
}

.avatar-resize-handle:hover {
    opacity: 1;
    background: var(--secondary-color);
}

.avatar-chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.avatar-chat-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar-chat-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.avatar-chat-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.avatar-chat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-selection {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.avatar-selection h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.avatar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.avatar-option {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-option::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.avatar-option:hover::after {
    opacity: 1;
}

.avatar-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-image {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected .avatar-image {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-name {
    color: var(--primary-color);
}

.avatar-option.selected .avatar-name {
    color: var(--primary-color);
}

.avatar-chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-video-container {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.avatar-video {
    width: 100%;
    height: 650px;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
}

.avatar-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-status {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator.error {
    background: var(--danger-color);
}

/* Assessment styles */
.assessment-container {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.assessment-container:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.assessment-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.assessment-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.assessment-results {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--border-light);
    border-radius: var(--border-radius-lg);
}

.assessment-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.assessment-results-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-results-score {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.assessment-results-summary {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-results-feedback {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

.assessment-question {
    margin-bottom: 1rem;
}

.assessment-question-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.assessment-question-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.assessment-question-evaluation {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.assessment-question-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-md);
    margin-left: 0.5rem;
}

.assessment-question-status.correct {
    background: var(--success-color);
    color: white;
}

.assessment-question-status.incorrect {
    background: var(--danger-color);
    color: white;
}

.assessment-question-status.skipped {
    background: var(--warning-color);
    color: white;
}

.assessment-question-points {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.assessment-question-score {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.assessment-question-correct-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-correct-answer span {
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-question-user-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-user-answer span {
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-question-explanation {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-explanation p {
    margin: 0;
}

.assessment-question-explanation ul,
.assessment-question-explanation ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.assessment-question-explanation li {
    margin-bottom: 0.25rem;
}

.assessment-question-explanation code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
}

.assessment-question-explanation a {
.nav-instance {
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    position: relative;
    flex-shrink: 0;
    top: 0;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: 40px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.nav-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.ai-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.user-welcome:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    border: 2px solid white;
}

.welcome-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: 352px 1fr 420px;
    height: calc(100vh - 80px);
    gap: 0;
    transition: var(--transition-normal);
}

.main-layout.collapsed {
    grid-template-columns: 60px 1fr 420px;
}

/* Conversation History Panel */
.conversation-panel {
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.main-layout.collapsed .conversation-panel {
    width: 60px;
}

.main-layout.collapsed .conversation-panel .conversation-content {
    display: none;
}

.main-layout.collapsed .conversation-panel .conversation-toggle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.conversation-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-normal);
}

.conversation-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    position: relative;
    padding-left: 3.5rem; /* Make room for toggle button on the left */
}

.conversation-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.3;
}

.conversation-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.conversation-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.conversation-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.conversation-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    z-index: 100;
}

.main-layout.collapsed .conversation-toggle {
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.collapsed .conversation-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.new-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-chat-btn i {
    font-size: 1rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    background: linear-gradient(180deg, var(--surface-color) 0%, var(--background-color) 100%);
}

.conversation-stats {
    padding: 1rem 1.25rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

.session-card {
    background: var(--surface-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.session-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.session-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.session-card:hover::before {
    width: 4px;
}

.session-card.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    box-shadow: var(--shadow-md);
}

.session-card.active::before {
    width: 4px;
}

.session-header {
    display: flex;
    align-items: center;
    justify-content: between;
    margin-bottom: 0.75rem;
}

.session-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    margin-right: 1rem;
    box-shadow: var(--shadow-sm);
}

.session-preview {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 500;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
}

.session-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-time i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.session-count {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-count i {
    font-size: 0.75rem;
}

.no-sessions {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.no-sessions i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-sessions h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.no-sessions p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Chat Area */
.chat-section {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    position: relative;
}

.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
    min-height: 0; /* Allow flex item to shrink */
    max-height: 100%; /* Prevent exceeding container */
    scroll-behavior: smooth; /* Add smooth scrolling */
    min-height: 300px; /* Ensures minimum usable height */
}

.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-message .message-avatar {
    background: var(--chat-user-bg);
    color: white;
}

.bot-message .message-avatar {
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
}

/* Bot avatar specific styling for tutoring theme */
.bot-message .message-avatar i {
    font-size: 1rem;
}

.message-bubble {
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.user-message .message-bubble {
    background: var(--chat-user-bg);
    color: white;
    border: none;
    border-bottom-right-radius: var(--border-radius-sm);
}

.bot-message .message-bubble {
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-bubble:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.message-content {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 1rem 0 0.5rem 0;
}

.message-content h3 {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message-content a {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    cursor: pointer;
}

.message-content a:hover {
    color: var(--secondary-color) !important;
    text-decoration: none !important;
    background-color: rgba(102, 126, 234, 0.1);
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
}

.user-message .message-content a {
    color: rgba(255, 255, 255, 0.9) !important;
}

.user-message .message-content a:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--text-primary);
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.message-content th,
.message-content td {
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    line-height: 1.5;
}

.message-content th {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message-content td {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.message-content tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.message-content tr:last-child td {
    border-bottom: none;
}

.user-message .message-content table {
    background: rgba(255, 255, 255, 0.1);
}

.user-message .message-content th {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.user-message .message-content td {
    color: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.user-message .message-content tr:hover {
    background: rgba(255, 255, 255, 0.1);
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.7;
}

.user-message .message-timestamp {
    color: rgba(255, 255, 255, 0.8);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0;
    animation: fadeIn 0.3s ease-out;
}

.typing-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.typing-avatar i {
    font-size: 1rem;
}

.typing-bubble {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    border-bottom-left-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 0.25rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0.32s; }

/* Input Area */
.chat-input {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.message-input {
    width: 100%;
    min-height: 2.75rem;
    max-height: 8rem;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    resize: none;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--surface-color);
    transition: var(--transition-fast);
    outline: none;
}

.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.message-input::placeholder {
    color: var(--text-muted);
}

.send-button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.send-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.send-button:active {
    transform: translateY(0) scale(0.98);
}

/* Microphone Button */
.microphone-button {
    background: var(--surface-color);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.microphone-button:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.microphone-button:active,
.microphone-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.microphone-button.recording {
    background: var(--primary-gradient);
    color: #fff;
    border-color: var(--primary-gradient);
    animation: pulse 1.2s infinite;
}

/* TTS Button */
.tts-button {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    opacity: 0;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.message:hover .tts-button {
    opacity: 1;
}

.tts-button:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.tts-button:active,
.tts-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

.tts-button.playing {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Make message bubbles relative for TTS button positioning */
.message-bubble {
    position: relative;
}

/* Voice Chat Button Styles */
#liveVoiceChatBtn {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

#liveVoiceChatBtn:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#liveVoiceChatBtn:active,
#liveVoiceChatBtn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

#liveVoiceChatBtn.active {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Right Panel - Suggestions & Actions */
.suggestions-panel {
    background: var(--surface-color);
    border-left: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 0;
}

.panel-header {
    padding: 1.5rem 1.5rem 0;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    flex-shrink: 0;
    top: 0;
    z-index: 10;
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.panel-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    line-height: 1.5;
}

.panel-content {
    padding: 1.5rem;
    flex: 1;
}

.panel-section {
    margin-bottom: 1.5rem;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.panel-section:last-child {
    margin-bottom: 0;
}

.panel-section.collapsed {
    margin-bottom: 0.75rem;
}

.section-header {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.section-header:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
}

.panel-section.collapsed .section-header {
    border-bottom: none;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
}

.section-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.panel-section.collapsed .section-icon {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

.section-info {
    flex: 1;
    min-width: 0;
}

.section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.panel-section.collapsed .section-title {
    font-size: 0.85rem;
    margin: 0;
}

.section-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.panel-section.collapsed .section-subtitle {
    font-size: 0.65rem;
}

.section-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.panel-section.collapsed .section-toggle {
    transform: rotate(-90deg);
}

.section-content {
    padding: 1.25rem;
    transition: var(--transition-normal);
    max-height: 1000px;
    opacity: 1;
}

.panel-section.collapsed .section-content {
    max-height: 0;
    padding: 0 1.25rem;
    opacity: 0;
    overflow: hidden;
}

.section-summary {
    display: none;
    padding: 0.5rem 1rem 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.panel-section.collapsed .section-summary {
    display: block;
}

/* Suggestion Cards */
.suggestion-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

.suggestion-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.suggestion-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.suggestion-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.suggestion-card:hover::before {
    height: 4px;
}

.suggestion-card.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-color: var(--primary-color);
}

.suggestion-card.featured::before {
    height: 4px;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.suggestion-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.card-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    gap: 0.75rem;
}

.action-item {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.action-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.action-item:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-color: var(--primary-color);
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.action-item:hover::before {
    width: 4px;
}

.action-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.action-content {
    flex: 1;
}

.action-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
}

.action-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0.25rem 0 0 0;
    line-height: 1.4;
}

.action-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: auto;
    box-shadow: var(--shadow-sm);
}

/* Agent Cards */
.agent-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.agent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.agent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.agent-card:hover::before {
    opacity: 1;
}

.agent-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.agent-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.agent-info {
    flex: 1;
}

.agent-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.agent-role {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.agent-status {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1.5rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 1;
    white-space: nowrap;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.agent-status i {
    font-size: 0.75rem;
    animation: pulse 2s infinite;
}

.agent-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    position: relative;
    z-index: 1;
}

.agent-features {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.feature-tag {
    background: var(--border-light);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Specific Agent Colors */
.agent-card.roleplay .agent-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.agent-card.assessment .agent-avatar {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.agent-card.scoring .agent-avatar {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.agent-card.knowledge .agent-avatar {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.agent-card.content .agent-avatar {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.agent-card.certificate .agent-avatar {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

/* Forms */
.form-container {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
    animation: fadeInUp 0.4s ease-out;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 100;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    transition: var(--transition-fast);
    background: var(--surface-color);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-button {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.form-button:active {
    transform: translateY(0);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
        width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--surface-elevated);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.4s ease-out;
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 0.5rem 0;
}

.modal-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.error-message {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    margin-top: 1rem;
        display: flex;
        align-items: center;
    gap: 0.5rem;
    border-left: 4px solid #dc2626;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: 320px 1fr 380px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 380px;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 300px 1fr 350px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 350px;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }
    
    .conversation-panel,
    .suggestions-panel {
        display: none;
    }
    
    .nav-instance {
        padding: 1rem;
    }
    
    .chat-messages {
        padding: 1rem;
    }
    
    .chat-input {
        padding: 1rem;
    }

    /* Avatar chat panel responsive */
    .avatar-chat-panel {
        width: 100%;
        right: -100%;
    }

    .avatar-chat-panel.open {
        right: 0;
    }

    .avatar-grid {
        grid-template-columns: 1fr;
    }

    .avatar-video {
        height: 50vh;
    }
}

@media (max-width: 768px) {
    .nav-instance {
        padding: 0.75rem;
    }
    
    .nav-title {
        font-size: 1.1rem;
    }
    
    .chat-header {
        padding: 1rem;
    }
    
    .chat-title h3 {
        font-size: 1.25rem;
    }
    
    .chat-subtitle {
        display: none;
    }
    
    .message {
        max-width: 95%;
    }
    
    .chat-messages {
        padding: 1rem;
        gap: 1rem;
    }

    /* Hide avatar chat button text on very small screens */
    .avatar-chat-btn span {
        display: none;
    }

    .avatar-chat-btn {
        padding: 0.5rem;
        margin-left: 0.5rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.visible {
        display: block !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

.bounce-in {
    animation: bounce 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Focus States */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive Design for Split Layout */
@media (max-width: 1024px) {
    .chat-messages.avatar-active {
        flex-direction: column;
    }

    .avatar-video-section,
    .links-preview-section {
        width: 100%;
    }

    .avatar-video-section {
        height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }

    .links-preview-section {
        border-left: none;
        border-top: 1px solid var(--border-light);
    }

    .avatar-grid-main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Chat Header */
.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Avatar Chat Button */
.avatar-chat-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(10px);
    margin-left: 1rem;
}

.avatar-chat-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.avatar-chat-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-chat-btn:disabled:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: none;
    box-shadow: none;
}

.avatar-chat-btn i {
    font-size: 1rem;
}

/* Avatar Chat Panel */
.avatar-chat-panel {
    position: fixed;
    top: 0;
    right: -500px;
    width: 500px;
    height: 100vh;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: horizontal;
    min-width: 400px;
    max-width: 800px;
}

.avatar-chat-panel.open {
    right: 0;
}

/* Transformed Chat Messages Area */
.chat-messages.avatar-mode {
    display: flex;
    flex-direction: column;
    padding: 0;
    background: var(--surface-color);
}

.avatar-selection-container {
    padding: 2rem;
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--border-light);
    text-align: center;
}

.avatar-selection-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.avatar-selection-container p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0 0 2rem 0;
}

.avatar-grid-main {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.avatar-option-main {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option-main:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option-main.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-image-main {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-image-main {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected .avatar-image-main {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name-main {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-name-main {
    color: var(--primary-color);
}

.avatar-option-main.selected .avatar-name-main {
    color: var(--primary-color);
}

/* Split Layout for Avatar + Chat */
.chat-messages.avatar-active {
    display: flex;
    flex-direction: row;
    padding: 0;
    background: var(--surface-color);
}

.avatar-video-section {
    width: 50%;
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: relative;
}

.avatar-video-main {
    flex: 1;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin: 1rem;
    box-shadow: var(--shadow-md);
}

.avatar-video-main video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls-main {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group-main {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input-main {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input-main:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn-main {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn-main:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn-main:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.chat-content-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
}

.chat-messages-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
}

.chat-input-section {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Links Preview Section */
.links-preview-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
}

.links-preview-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
}

.links-preview-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.links-preview-header h3::before {
    content: '\f0c1';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
}

.links-preview-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.links-preview-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.no-links-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.no-links-message i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-links-message p {
    font-size: 0.875rem;
    margin: 0;
}

.link-item {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.link-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.link-item:last-child {
    margin-bottom: 0;
}

.link-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.link-url {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin: 0;
    word-break: break-all;
    font-family: monospace;
}

.link-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.avatar-status-main {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.avatar-status-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator-main {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator-main.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator-main.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator-main.error {
    background: var(--danger-color);
}

/* Back to Chat Button */
.back-to-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.back-to-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.back-to-chat-btn i {
    font-size: 0.875rem;
}

/* Resize handle for avatar panel */
.avatar-resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    cursor: ew-resize;
    opacity: 0;
    transition: var(--transition-fast);
}

.avatar-chat-panel:hover .avatar-resize-handle {
    opacity: 1;
}

.avatar-resize-handle:hover {
    opacity: 1;
    background: var(--secondary-color);
}

.avatar-chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.avatar-chat-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar-chat-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.avatar-chat-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.avatar-chat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-selection {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.avatar-selection h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.avatar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.avatar-option {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-option::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.avatar-option:hover::after {
    opacity: 1;
}

.avatar-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-image {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected .avatar-image {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-name {
    color: var(--primary-color);
}

.avatar-option.selected .avatar-name {
    color: var(--primary-color);
}

.avatar-chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-video-container {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.avatar-video {
    width: 100%;
    height: 650px;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
}

.avatar-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-status {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator.error {
    background: var(--danger-color);
}

.assessment-question-explanation a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.assessment-question-explanation a:hover {
    text-decoration: underline;
}

.assessment-question-explanation a:active {
    color: var(--primary-color-dark);
}

.assessment-question-explanation code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
}

.assessment-question-explanation pre {
    background: var(--border-light);
    padding: 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    overflow-x: auto;
}

.assessment-question-explanation blockquote {
    background: var(--border-light);
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    border-left: 4px solid var(--primary-color);
    margin: 1rem 0;
}

.assessment-question-explanation ul,
.assessment-question-explanation ol {
    padding-left: 2rem;
    margin: 0.5rem 0;
}

.assessment-question-explanation li {
    margin-bottom: 0.25rem;
}

.assessment-question-explanation hr {
    border: none;
    height: 1px;
    background: var(--border-light);
    margin: 1rem 0;
}

.assessment-question-explanation table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.assessment-question-explanation th,
.assessment-question-explanation td {
    padding: 0.5rem;
    border: 1px solid var(--border-light);
}

.assessment-question-explanation th {
    background: var(--border-light);
    font-weight: 600;
}

.assessment-question-explanation img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1rem 0;
}

.assessment-question-explanation strong {
    font-weight: 600;
}

.assessment-question-explanation em {
    font-style: italic;
}

.assessment-question-explanation del {
    text-decoration: line-through;
}

.assessment-question-explanation a[href^="http"] {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.assessment-question-explanation a[href^="http"]:hover {
    text-decoration: underline;
}

.assessment-question-explanation a[href^="http"]:active {
    color: var(--primary-color-dark);
}

.assessment-question-explanation h1,
.assessment-question-explanation h2,
.assessment-question-explanation h3,
.assessment-question-explanation h4,
.assessment-question-explanation h5,
.assessment-question-explanation h6 {
    margin: 1rem 0;
    font-weight: 600;
    line-height: 1.2;
}

.assessment-question-explanation h1 {
    font-size: 1.5rem;
}

.assessment-question-explanation h2 {
    font-size: 1.25rem;
}

.assessment-question-explanation h3 {
    font-size: 1rem;
}

.assessment-question-explanation h4 {
    font-size: 0.9rem;
}

.assessment-question-explanation h5 {
    font-size: 0.8rem;
}

.assessment-question-explanation h6 {
    font-size: 0.7rem;
}

.assessment-question-explanation p {
    margin: 0.5rem 0;
    line-height: 1.4;
}

.assessment-question-explanation .math {
    font-family: 'KaTeX_Main', 'KaTeX_AMS', 'KaTeX_Size1', 'KaTeX_Size2', 'KaTeX_Size3', 'KaTeX_Size4', 'KaTeX_Size1', 'KaTeX_AMS', 'KaTeX_Main';
    font-size: 1.2em;
    text-align: center;
    margin: 0.5em 0;
}

.assessment-question-explanation .math * {
    font-family: inherit;
    font-size: inherit;
    text-align: inherit;
}

.assessment-question-explanation .math .katex-display > .katex {
    margin: 0;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-mathml {
    display: block;
    margin: 0 auto;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html {
    display: block;
    margin: 0 auto;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base {
    text-align: center;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .strut {
    display: block;
    height: 0.6em;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mord {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mspace {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mrel {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mop {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mopen {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mclose {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mpadded {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mtable {
    display: inline-table;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mtr {
    display: table-row;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mtd {
    display: table-cell;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mfrac {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msqrt {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mroot {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mstyle {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .merror {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mphantom {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .menclose {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .munder {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mover {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mmultiscripts {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .maction {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mtext {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mspace {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .ms {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mglyph {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mrow {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .semantics {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .annotation {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .annotation-xml {
    display: none;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .munderover {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .maligngroup {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .malignmark {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mstack {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
    display: inline-block;
}

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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
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.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
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}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarry {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msgroup {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .msrow {
    display: inline-block;
}

.assessment-question-explanation .math .katex-display > .katex > .katex-html > .base > .mscarries {
    display: inline-block;
}

.nav-instance {
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    position: relative;
    flex-shrink: 0;
    top: 0;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: 40px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.nav-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.ai-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.user-welcome:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    border: 2px solid white;
}

.welcome-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: 352px 1fr 420px;
    height: calc(100vh - 80px);
    gap: 0;
    transition: var(--transition-normal);
}

.main-layout.collapsed {
    grid-template-columns: 60px 1fr 420px;
}

/* Conversation History Panel */
.conversation-panel {
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.main-layout.collapsed .conversation-panel {
    width: 60px;
}

.main-layout.collapsed .conversation-panel .conversation-content {
    display: none;
}

.main-layout.collapsed .conversation-panel .conversation-toggle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.conversation-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-normal);
}

.conversation-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    position: relative;
    padding-left: 3.5rem; /* Make room for toggle button on the left */
}

.conversation-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.3;
}

.conversation-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.conversation-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.conversation-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.conversation-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    z-index: 100;
}

.main-layout.collapsed .conversation-toggle {
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.collapsed .conversation-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.new-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-chat-btn i {
    font-size: 1rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    background: linear-gradient(180deg, var(--surface-color) 0%, var(--background-color) 100%);
}

.conversation-stats {
    padding: 1rem 1.25rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

.session-card {
    background: var(--surface-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.session-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.session-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.session-card:hover::before {
    width: 4px;
}

.session-card.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    box-shadow: var(--shadow-md);
}

.session-card.active::before {
    width: 4px;
}

.session-header {
    display: flex;
    align-items: center;
    justify-content: between;
    margin-bottom: 0.75rem;
}

.session-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    margin-right: 1rem;
    box-shadow: var(--shadow-sm);
}

.session-preview {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 500;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
}

.session-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-time i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.session-count {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-count i {
    font-size: 0.75rem;
}

.no-sessions {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.no-sessions i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-sessions h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.no-sessions p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Chat Area */
.chat-section {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    position: relative;
}

.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
    min-height: 0; /* Allow flex item to shrink */
    max-height: 100%; /* Prevent exceeding container */
    scroll-behavior: smooth; /* Add smooth scrolling */
    min-height: 300px; /* Ensures minimum usable height */
}

.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-message .message-avatar {
    background: var(--chat-user-bg);
    color: white;
}

.bot-message .message-avatar {
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
}

/* Bot avatar specific styling for tutoring theme */
.bot-message .message-avatar i {
    font-size: 1rem;
}

.message-bubble {
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.user-message .message-bubble {
    background: var(--chat-user-bg);
    color: white;
    border: none;
    border-bottom-right-radius: var(--border-radius-sm);
}

.bot-message .message-bubble {
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-bubble:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.message-content {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 1rem 0 0.5rem 0;
}

.message-content h3 {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message-content a {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    cursor: pointer;
}

.message-content a:hover {
    color: var(--secondary-color) !important;
    text-decoration: none !important;
    background-color: rgba(102, 126, 234, 0.1);
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
}

.user-message .message-content a {
    color: rgba(255, 255, 255, 0.9) !important;
}

.user-message .message-content a:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--text-primary);
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.message-content th,
.message-content td {
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    line-height: 1.5;
}

.message-content th {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message-content td {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.message-content tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.message-content tr:last-child td {
    border-bottom: none;
}

.user-message .message-content table {
    background: rgba(255, 255, 255, 0.1);
}

.user-message .message-content th {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.user-message .message-content td {
    color: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.user-message .message-content tr:hover {
    background: rgba(255, 255, 255, 0.1);
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.7;
}

.user-message .message-timestamp {
    color: rgba(255, 255, 255, 0.8);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0;
    animation: fadeIn 0.3s ease-out;
}

.typing-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.typing-avatar i {
    font-size: 1rem;
}

.typing-bubble {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    border-bottom-left-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 0.25rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0.32s; }

/* Input Area */
.chat-input {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.message-input {
    width: 100%;
    min-height: 2.75rem;
    max-height: 8rem;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    resize: none;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--surface-color);
    transition: var(--transition-fast);
    outline: none;
}

.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.message-input::placeholder {
    color: var(--text-muted);
}

.send-button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.send-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.send-button:active {
    transform: translateY(0) scale(0.98);
}

/* Microphone Button */
.microphone-button {
    background: var(--surface-color);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.microphone-button:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.microphone-button:active,
.microphone-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.microphone-button.recording {
    background: var(--primary-gradient);
    color: #fff;
    border-color: var(--primary-gradient);
    animation: pulse 1.2s infinite;
}

/* TTS Button */
.tts-button {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    opacity: 0;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.message:hover .tts-button {
    opacity: 1;
}

.tts-button:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.tts-button:active,
.tts-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

.tts-button.playing {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Make message bubbles relative for TTS button positioning */
.message-bubble {
    position: relative;
}

/* Voice Chat Button Styles */
#liveVoiceChatBtn {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

#liveVoiceChatBtn:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#liveVoiceChatBtn:active,
#liveVoiceChatBtn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

#liveVoiceChatBtn.active {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Right Panel - Suggestions & Actions */
.suggestions-panel {
    background: var(--surface-color);
    border-left: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 0;
}

.panel-header {
    padding: 1.5rem 1.5rem 0;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    flex-shrink: 0;
    top: 0;
    z-index: 10;
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.panel-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    line-height: 1.5;
}

.panel-content {
    padding: 1.5rem;
    flex: 1;
}

.panel-section {
    margin-bottom: 1.5rem;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.panel-section:last-child {
    margin-bottom: 0;
}

.panel-section.collapsed {
    margin-bottom: 0.75rem;
}

.section-header {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.section-header:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
}

.panel-section.collapsed .section-header {
    border-bottom: none;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
}

.section-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.panel-section.collapsed .section-icon {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

.section-info {
    flex: 1;
    min-width: 0;
}

.section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.panel-section.collapsed .section-title {
    font-size: 0.85rem;
    margin: 0;
}

.section-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.panel-section.collapsed .section-subtitle {
    font-size: 0.65rem;
}

.section-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.panel-section.collapsed .section-toggle {
    transform: rotate(-90deg);
}

.section-content {
    padding: 1.25rem;
    transition: var(--transition-normal);
    max-height: 1000px;
    opacity: 1;
}

.panel-section.collapsed .section-content {
    max-height: 0;
    padding: 0 1.25rem;
    opacity: 0;
    overflow: hidden;
}

.section-summary {
    display: none;
    padding: 0.5rem 1rem 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.panel-section.collapsed .section-summary {
    display: block;
}

/* Suggestion Cards */
.suggestion-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

.suggestion-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.suggestion-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.suggestion-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.suggestion-card:hover::before {
    height: 4px;
}

.suggestion-card.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-color: var(--primary-color);
}

.suggestion-card.featured::before {
    height: 4px;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.suggestion-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.card-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    gap: 0.75rem;
}

.action-item {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.action-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.action-item:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-color: var(--primary-color);
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.action-item:hover::before {
    width: 4px;
}

.action-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.action-content {
    flex: 1;
}

.action-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
}

.action-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0.25rem 0 0 0;
    line-height: 1.4;
}

.action-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: auto;
    box-shadow: var(--shadow-sm);
}

/* Agent Cards */
.agent-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.agent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.agent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.agent-card:hover::before {
    opacity: 1;
}

.agent-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.agent-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.agent-info {
    flex: 1;
}

.agent-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.agent-role {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.agent-status {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1.5rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 1;
    white-space: nowrap;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.agent-status i {
    font-size: 0.75rem;
    animation: pulse 2s infinite;
}

.agent-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    position: relative;
    z-index: 1;
}

.agent-features {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.feature-tag {
    background: var(--border-light);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Specific Agent Colors */
.agent-card.roleplay .agent-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.agent-card.assessment .agent-avatar {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.agent-card.scoring .agent-avatar {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.agent-card.knowledge .agent-avatar {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.agent-card.content .agent-avatar {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.agent-card.certificate .agent-avatar {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

/* Forms */
.form-container {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
    animation: fadeInUp 0.4s ease-out;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 100;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    transition: var(--transition-fast);
    background: var(--surface-color);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-button {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.form-button:active {
    transform: translateY(0);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
        width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--surface-elevated);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.4s ease-out;
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 0.5rem 0;
}

.modal-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.error-message {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    margin-top: 1rem;
        display: flex;
        align-items: center;
    gap: 0.5rem;
    border-left: 4px solid #dc2626;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: 320px 1fr 380px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 380px;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 300px 1fr 350px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 350px;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }
    
    .conversation-panel,
    .suggestions-panel {
        display: none;
    }
    
    .nav-instance {
        padding: 1rem;
    }
    
    .chat-messages {
        padding: 1rem;
    }
    
    .chat-input {
        padding: 1rem;
    }

    /* Avatar chat panel responsive */
    .avatar-chat-panel {
        width: 100%;
        right: -100%;
    }

    .avatar-chat-panel.open {
        right: 0;
    }

    .avatar-grid {
        grid-template-columns: 1fr;
    }

    .avatar-video {
        height: 50vh;
    }
}

@media (max-width: 768px) {
    .nav-instance {
        padding: 0.75rem;
    }
    
    .nav-title {
        font-size: 1.1rem;
    }
    
    .chat-header {
        padding: 1rem;
    }
    
    .chat-title h3 {
        font-size: 1.25rem;
    }
    
    .chat-subtitle {
        display: none;
    }
    
    .message {
        max-width: 95%;
    }
    
    .chat-messages {
        padding: 1rem;
        gap: 1rem;
    }

    /* Hide avatar chat button text on very small screens */
    .avatar-chat-btn span {
        display: none;
    }

    .avatar-chat-btn {
        padding: 0.5rem;
        margin-left: 0.5rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.visible {
        display: block !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

.bounce-in {
    animation: bounce 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Focus States */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive Design for Split Layout */
@media (max-width: 1024px) {
    .chat-messages.avatar-active {
        flex-direction: column;
    }

    .avatar-video-section,
    .links-preview-section {
        width: 100%;
    }

    .avatar-video-section {
        height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }

    .links-preview-section {
        border-left: none;
        border-top: 1px solid var(--border-light);
    }

    .avatar-grid-main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Chat Header */
.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2V6h4V4H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Avatar Chat Button */
.avatar-chat-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(10px);
    margin-left: 1rem;
}

.avatar-chat-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.avatar-chat-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-chat-btn:disabled:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: none;
    box-shadow: none;
}

.avatar-chat-btn i {
    font-size: 1rem;
}

/* Avatar Chat Panel */
.avatar-chat-panel {
    position: fixed;
    top: 0;
    right: -500px;
    width: 500px;
    height: 100vh;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: horizontal;
    min-width: 400px;
    max-width: 800px;
}

.avatar-chat-panel.open {
    right: 0;
}

/* Transformed Chat Messages Area */
.chat-messages.avatar-mode {
    display: flex;
    flex-direction: column;
    padding: 0;
    background: var(--surface-color);
}

.avatar-selection-container {
    padding: 2rem;
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--border-light);
    text-align: center;
}

.avatar-selection-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.avatar-selection-container p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0 0 2rem 0;
}

.avatar-grid-main {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.avatar-option-main {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option-main:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option-main.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-image-main {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-image-main {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected .avatar-image-main {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name-main {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-name-main {
    color: var(--primary-color);
}

.avatar-option-main.selected .avatar-name-main {
    color: var(--primary-color);
}

/* Split Layout for Avatar + Chat */
.chat-messages.avatar-active {
    display: flex;
    flex-direction: row;
    padding: 0;
    background: var(--surface-color);
}

.avatar-video-section {
    width: 50%;
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: relative;
}

.avatar-video-main {
    flex: 1;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin: 1rem;
    box-shadow: var(--shadow-md);
}

.avatar-video-main video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls-main {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group-main {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input-main {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input-main:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn-main {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn-main:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn-main:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.chat-content-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
}

.chat-messages-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
}

.chat-input-section {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Links Preview Section */
.links-preview-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
}

.links-preview-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
}

.links-preview-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.links-preview-header h3::before {
    content: '\f0c1';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
}

.links-preview-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.links-preview-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.no-links-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.no-links-message i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-links-message p {
    font-size: 0.875rem;
    margin: 0;
}

.link-item {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.link-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.link-item:last-child {
    margin-bottom: 0;
}

.link-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.link-url {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin: 0;
    word-break: break-all;
    font-family: monospace;
}

.link-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.avatar-status-main {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.avatar-status-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator-main {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator-main.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator-main.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator-main.error {
    background: var(--danger-color);
}

/* Back to Chat Button */
.back-to-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.back-to-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.back-to-chat-btn i {
    font-size: 0.875rem;
}

/* Resize handle for avatar panel */
.avatar-resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    cursor: ew-resize;
    opacity: 0;
    transition: var(--transition-fast);
}

.avatar-chat-panel:hover .avatar-resize-handle {
    opacity: 1;
}

.avatar-resize-handle:hover {
    opacity: 1;
    background: var(--secondary-color);
}

.avatar-chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.avatar-chat-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar-chat-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.avatar-chat-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.avatar-chat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-selection {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.avatar-selection h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.avatar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.avatar-option {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-option::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.avatar-option:hover::after {
    opacity: 1;
}

.avatar-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-image {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected .avatar-image {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-name {
    color: var(--primary-color);
}

.avatar-option.selected .avatar-name {
    color: var(--primary-color);
}

.avatar-chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-video-container {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.avatar-video {
    width: 100%;
    height: 650px;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
}

.avatar-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-status {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator.error {
    background: var(--danger-color);
}

/* Assessment styles */
.assessment-container {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.assessment-container:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.assessment-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.assessment-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.assessment-results {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--border-light);
    border-radius: var(--border-radius-lg);
}

.assessment-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.assessment-results-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-results-score {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.assessment-results-summary {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-results-feedback {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

.assessment-question {
    margin-bottom: 1rem;
}

.assessment-question-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.assessment-question-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.assessment-question-evaluation {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.assessment-question-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-md);
    margin-left: 0.5rem;
}

.assessment-question-status.correct {
    background: var(--success-color);
    color: white;
}

.assessment-question-status.incorrect {
    background: var(--danger-color);
    color: white;
}

.assessment-question-status.skipped {
    background: var(--warning-color);
    color: white;
}

.assessment-question-points {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.assessment-question-score {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.assessment-question-correct-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-correct-answer span {
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-question-user-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-user-answer span {
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-question-explanation {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-explanation p {
    margin: 0;
}

.assessment-question-explanation ul,
.assessment-question-explanation ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.assessment-question-explanation li {
    margin-bottom: 0.25rem;
}

.assessment-question-explanation code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
}

.assessment-question-explanation a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.assessment-question-explanation a:hover {
    text-decoration: underline;
}

/* Assessment Evaluation Bubble Styling */
.assessment-bubble {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.assessment-message .message-avatar {
    background: var(--primary-gradient);
    color: white;
}

.assessment-interface-wrapper {
    min-height: 200px;
}

/* Assessment Results Styling */
.assessment-results {
    padding: 1.5rem;
    background: var(--surface-color);
    border-radius: var(--border-radius-lg);
}

.assessment-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.assessment-results-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.assessment-results-score {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.assessment-question-item {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-md);
    padding: 1rem;
    margin-bottom: 1rem;
}

.assessment-question-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.assessment-answer-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.assessment-answer-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.assessment-answer-value {
    color: var(--text-primary);
}

.assessment-score-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.assessment-score-badge.correct {
    background: var(--success-color);
    color: white;
}

.assessment-score-badge.incorrect {
    background: #ef4444;
    color: white;
}

.assessment-evaluation-text {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: rgba(102, 126, 234, 0.05);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--primary-color);
}

.assessment-summary {
    background: var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.assessment-summary h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.assessment-summary p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #4facfe;
    --warning-color: #43e97b;
    
    --background-color: #f8faff;
    --surface-color: #ffffff;
    --surface-elevated: #ffffff;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --chat-user-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --chat-bot-bg: #ffffff;
    --chat-system-bg: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    
    --border-radius-sm: 0.5rem;
    --border-radius-md: 0.75rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    margin: 0;
    height: 100vh;
    background: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
    40%, 43% { transform: translate3d(0, -8px, 0); }
    70% { transform: translate3d(0, -4px, 0); }
    90% { transform: translate3d(0, -2px, 0); }
}

/* Navigation */
.nav-instance {
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    position: relative;
    flex-shrink: 0;
    top: 0;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: 40px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.nav-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.ai-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.user-welcome:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    border: 2px solid white;
}

.welcome-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: 352px 1fr 420px;
    height: calc(100vh - 80px);
    gap: 0;
    transition: var(--transition-normal);
}

.main-layout.collapsed {
    grid-template-columns: 60px 1fr 420px;
}

/* Conversation History Panel */
.conversation-panel {
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.main-layout.collapsed .conversation-panel {
    width: 60px;
}

.main-layout.collapsed .conversation-panel .conversation-content {
    display: none;
}

.main-layout.collapsed .conversation-panel .conversation-toggle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.conversation-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-normal);
}

.conversation-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    position: relative;
    padding-left: 3.5rem; /* Make room for toggle button on the left */
}

.conversation-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.3;
}

.conversation-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.conversation-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.conversation-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.conversation-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    z-index: 100;
}

.main-layout.collapsed .conversation-toggle {
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.collapsed .conversation-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.new-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-chat-btn i {
    font-size: 1rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    background: linear-gradient(180deg, var(--surface-color) 0%, var(--background-color) 100%);
}

.conversation-stats {
    padding: 1rem 1.25rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

.session-card {
    background: var(--surface-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.session-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.session-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.session-card:hover::before {
    width: 4px;
}

.session-card.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    box-shadow: var(--shadow-md);
}

.session-card.active::before {
    width: 4px;
}

.session-header {
    display: flex;
    align-items: center;
    justify-content: between;
    margin-bottom: 0.75rem;
}

.session-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    margin-right: 1rem;
    box-shadow: var(--shadow-sm);
}

.session-preview {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 500;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
}

.session-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-time i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.session-count {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-count i {
    font-size: 0.75rem;
}

.no-sessions {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.no-sessions i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-sessions h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.no-sessions p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Chat Area */
.chat-section {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    position: relative;
}

.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2V6h4V4H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
    min-height: 0; /* Allow flex item to shrink */
    max-height: 100%; /* Prevent exceeding container */
    scroll-behavior: smooth; /* Add smooth scrolling */
    min-height: 300px; /* Ensures minimum usable height */
}

.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-message .message-avatar {
    background: var(--chat-user-bg);
    color: white;
}

.bot-message .message-avatar {
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
}

/* Bot avatar specific styling for tutoring theme */
.bot-message .message-avatar i {
    font-size: 1rem;
}

.message-bubble {
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.user-message .message-bubble {
    background: var(--chat-user-bg);
    color: white;
    border: none;
    border-bottom-right-radius: var(--border-radius-sm);
}

.bot-message .message-bubble {
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-bubble:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.message-content {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 1rem 0 0.5rem 0;
}

.message-content h3 {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message-content a {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    cursor: pointer;
}

.message-content a:hover {
    color: var(--secondary-color) !important;
    text-decoration: none !important;
    background-color: rgba(102, 126, 234, 0.1);
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
}

.user-message .message-content a {
    color: rgba(255, 255, 255, 0.9) !important;
}

.user-message .message-content a:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
}

.nav-instance {
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    position: relative;
    flex-shrink: 0;
    top: 0;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: 40px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.nav-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.ai-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.user-welcome:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    border: 2px solid white;
}

.welcome-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: 352px 1fr 420px;
    height: calc(100vh - 80px);
    gap: 0;
    transition: var(--transition-normal);
}

.main-layout.collapsed {
    grid-template-columns: 60px 1fr 420px;
}

/* Conversation History Panel */
.conversation-panel {
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.main-layout.collapsed .conversation-panel {
    width: 60px;
}

.main-layout.collapsed .conversation-panel .conversation-content {
    display: none;
}

.main-layout.collapsed .conversation-panel .conversation-toggle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.conversation-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-normal);
}

.conversation-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    position: relative;
    padding-left: 3.5rem; /* Make room for toggle button on the left */
}

.conversation-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.3;
}

.conversation-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.conversation-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.conversation-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.conversation-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    z-index: 100;
}

.main-layout.collapsed .conversation-toggle {
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.collapsed .conversation-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.new-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-chat-btn i {
    font-size: 1rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    background: linear-gradient(180deg, var(--surface-color) 0%, var(--background-color) 100%);
}

.conversation-stats {
    padding: 1rem 1.25rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

.session-card {
    background: var(--surface-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.session-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.session-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.session-card:hover::before {
    width: 4px;
}

.session-card.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    box-shadow: var(--shadow-md);
}

.session-card.active::before {
    width: 4px;
}

.session-header {
    display: flex;
    align-items: center;
    justify-content: between;
    margin-bottom: 0.75rem;
}

.session-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    margin-right: 1rem;
    box-shadow: var(--shadow-sm);
}

.session-preview {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 500;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
}

.session-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-time i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.session-count {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-count i {
    font-size: 0.75rem;
}

.no-sessions {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.no-sessions i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-sessions h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.no-sessions p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Chat Area */
.chat-section {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    position: relative;
}

.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
    min-height: 0; /* Allow flex item to shrink */
    max-height: 100%; /* Prevent exceeding container */
    scroll-behavior: smooth; /* Add smooth scrolling */
    min-height: 300px; /* Ensures minimum usable height */
}

.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-message .message-avatar {
    background: var(--chat-user-bg);
    color: white;
}

.bot-message .message-avatar {
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
}

/* Bot avatar specific styling for tutoring theme */
.bot-message .message-avatar i {
    font-size: 1rem;
}

.message-bubble {
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.user-message .message-bubble {
    background: var(--chat-user-bg);
    color: white;
    border: none;
    border-bottom-right-radius: var(--border-radius-sm);
}

.bot-message .message-bubble {
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-bubble:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.message-content {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 1rem 0 0.5rem 0;
}

.message-content h3 {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message-content a {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    cursor: pointer;
}

.message-content a:hover {
    color: var(--secondary-color) !important;
    text-decoration: none !important;
    background-color: rgba(102, 126, 234, 0.1);
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
}

.user-message .message-content a {
    color: rgba(255, 255, 255, 0.9) !important;
}

.user-message .message-content a:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--text-primary);
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.message-content th,
.message-content td {
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    line-height: 1.5;
}

.message-content th {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message-content td {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.message-content tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.message-content tr:last-child td {
    border-bottom: none;
}

.user-message .message-content table {
    background: rgba(255, 255, 255, 0.1);
}

.user-message .message-content th {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.user-message .message-content td {
    color: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.user-message .message-content tr:hover {
    background: rgba(255, 255, 255, 0.1);
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.7;
}

.user-message .message-timestamp {
    color: rgba(255, 255, 255, 0.8);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0;
    animation: fadeIn 0.3s ease-out;
}

.typing-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.typing-avatar i {
    font-size: 1rem;
}

.typing-bubble {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    border-bottom-left-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 0.25rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0.32s; }

/* Input Area */
.chat-input {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.message-input {
    width: 100%;
    min-height: 2.75rem;
    max-height: 8rem;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    resize: none;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--surface-color);
    transition: var(--transition-fast);
    outline: none;
}

.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.message-input::placeholder {
    color: var(--text-muted);
}

.send-button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.send-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.send-button:active {
    transform: translateY(0) scale(0.98);
}

/* Microphone Button */
.microphone-button {
    background: var(--surface-color);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.microphone-button:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.microphone-button:active,
.microphone-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.microphone-button.recording {
    background: var(--primary-gradient);
    color: #fff;
    border-color: var(--primary-gradient);
    animation: pulse 1.2s infinite;
}

/* TTS Button */
.tts-button {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    opacity: 0;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.message:hover .tts-button {
    opacity: 1;
}

.tts-button:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.tts-button:active,
.tts-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

.tts-button.playing {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Make message bubbles relative for TTS button positioning */
.message-bubble {
    position: relative;
}

/* Voice Chat Button Styles */
#liveVoiceChatBtn {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

#liveVoiceChatBtn:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#liveVoiceChatBtn:active,
#liveVoiceChatBtn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

#liveVoiceChatBtn.active {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Right Panel - Suggestions & Actions */
.suggestions-panel {
    background: var(--surface-color);
    border-left: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 0;
}

.panel-header {
    padding: 1.5rem 1.5rem 0;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    flex-shrink: 0;
    top: 0;
    z-index: 10;
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.panel-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    line-height: 1.5;
}

.panel-content {
    padding: 1.5rem;
    flex: 1;
}

.panel-section {
    margin-bottom: 1.5rem;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.panel-section:last-child {
    margin-bottom: 0;
}

.panel-section.collapsed {
    margin-bottom: 0.75rem;
}

.section-header {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.section-header:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
}

.panel-section.collapsed .section-header {
    border-bottom: none;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
}

.section-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.panel-section.collapsed .section-icon {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

.section-info {
    flex: 1;
    min-width: 0;
}

.section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.panel-section.collapsed .section-title {
    font-size: 0.85rem;
    margin: 0;
}

.section-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.panel-section.collapsed .section-subtitle {
    font-size: 0.65rem;
}

.section-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.panel-section.collapsed .section-toggle {
    transform: rotate(-90deg);
}

.section-content {
    padding: 1.25rem;
    transition: var(--transition-normal);
    max-height: 1000px;
    opacity: 1;
}

.panel-section.collapsed .section-content {
    max-height: 0;
    padding: 0 1.25rem;
    opacity: 0;
    overflow: hidden;
}

.section-summary {
    display: none;
    padding: 0.5rem 1rem 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.panel-section.collapsed .section-summary {
    display: block;
}

/* Suggestion Cards */
.suggestion-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

.suggestion-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.suggestion-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.suggestion-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.suggestion-card:hover::before {
    height: 4px;
}

.suggestion-card.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-color: var(--primary-color);
}

.suggestion-card.featured::before {
    height: 4px;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.suggestion-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.card-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    gap: 0.75rem;
}

.action-item {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.action-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.action-item:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-color: var(--primary-color);
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.action-item:hover::before {
    width: 4px;
}

.action-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.action-content {
    flex: 1;
}

.action-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
}

.action-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0.25rem 0 0 0;
    line-height: 1.4;
}

.action-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: auto;
    box-shadow: var(--shadow-sm);
}

/* Agent Cards */
.agent-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.agent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.agent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.agent-card:hover::before {
    opacity: 1;
}

.agent-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.agent-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.agent-info {
    flex: 1;
}

.agent-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.agent-role {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.agent-status {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1.5rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 1;
    white-space: nowrap;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.agent-status i {
    font-size: 0.75rem;
    animation: pulse 2s infinite;
}

.agent-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    position: relative;
    z-index: 1;
}

.agent-features {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.feature-tag {
    background: var(--border-light);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Specific Agent Colors */
.agent-card.roleplay .agent-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.agent-card.assessment .agent-avatar {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.agent-card.scoring .agent-avatar {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.agent-card.knowledge .agent-avatar {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.agent-card.content .agent-avatar {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.agent-card.certificate .agent-avatar {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

/* Forms */
.form-container {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
    animation: fadeInUp 0.4s ease-out;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 100;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    transition: var(--transition-fast);
    background: var(--surface-color);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-button {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.form-button:active {
    transform: translateY(0);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
        width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--surface-elevated);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.4s ease-out;
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 0.5rem 0;
}

.modal-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.error-message {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    margin-top: 1rem;
        display: flex;
        align-items: center;
    gap: 0.5rem;
    border-left: 4px solid #dc2626;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: 320px 1fr 380px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 380px;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 300px 1fr 350px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 350px;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }
    
    .conversation-panel,
    .suggestions-panel {
        display: none;
    }
    
    .nav-instance {
        padding: 1rem;
    }
    
    .chat-messages {
        padding: 1rem;
    }
    
    .chat-input {
        padding: 1rem;
    }

    /* Avatar chat panel responsive */
    .avatar-chat-panel {
        width: 100%;
        right: -100%;
    }

    .avatar-chat-panel.open {
        right: 0;
    }

    .avatar-grid {
        grid-template-columns: 1fr;
    }

    .avatar-video {
        height: 50vh;
    }
}

@media (max-width: 768px) {
    .nav-instance {
        padding: 0.75rem;
    }
    
    .nav-title {
        font-size: 1.1rem;
    }
    
    .chat-header {
        padding: 1rem;
    }
    
    .chat-title h3 {
        font-size: 1.25rem;
    }
    
    .chat-subtitle {
        display: none;
    }
    
    .message {
        max-width: 95%;
    }
    
    .chat-messages {
        padding: 1rem;
        gap: 1rem;
    }

    /* Hide avatar chat button text on very small screens */
    .avatar-chat-btn span {
        display: none;
    }

    .avatar-chat-btn {
        padding: 0.5rem;
        margin-left: 0.5rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.visible {
        display: block !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

.bounce-in {
    animation: bounce 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Focus States */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive Design for Split Layout */
@media (max-width: 1024px) {
    .chat-messages.avatar-active {
        flex-direction: column;
    }

    .avatar-video-section,
    .links-preview-section {
        width: 100%;
    }

    .avatar-video-section {
        height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }

    .links-preview-section {
        border-left: none;
        border-top: 1px solid var(--border-light);
    }

    .avatar-grid-main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Chat Header */
.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2V6h4V4H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Avatar Chat Button */
.avatar-chat-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(10px);
    margin-left: 1rem;
}

.avatar-chat-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.avatar-chat-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-chat-btn:disabled:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: none;
    box-shadow: none;
}

.avatar-chat-btn i {
    font-size: 1rem;
}

/* Avatar Chat Panel */
.avatar-chat-panel {
    position: fixed;
    top: 0;
    right: -500px;
    width: 500px;
    height: 100vh;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: horizontal;
    min-width: 400px;
    max-width: 800px;
}

.avatar-chat-panel.open {
    right: 0;
}

/* Transformed Chat Messages Area */
.chat-messages.avatar-mode {
    display: flex;
    flex-direction: column;
    padding: 0;
    background: var(--surface-color);
}

.avatar-selection-container {
    padding: 2rem;
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--border-light);
    text-align: center;
}

.avatar-selection-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.avatar-selection-container p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0 0 2rem 0;
}

.avatar-grid-main {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.avatar-option-main {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option-main:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option-main.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-image-main {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-image-main {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected .avatar-image-main {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name-main {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-name-main {
    color: var(--primary-color);
}

.avatar-option-main.selected .avatar-name-main {
    color: var(--primary-color);
}

/* Split Layout for Avatar + Chat */
.chat-messages.avatar-active {
    display: flex;
    flex-direction: row;
    padding: 0;
    background: var(--surface-color);
}

.avatar-video-section {
    width: 50%;
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: relative;
}

.avatar-video-main {
    flex: 1;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin: 1rem;
    box-shadow: var(--shadow-md);
}

.avatar-video-main video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls-main {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group-main {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input-main {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input-main:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn-main {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn-main:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn-main:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.chat-content-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
}

.chat-messages-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
}

.chat-input-section {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Links Preview Section */
.links-preview-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
}

.links-preview-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
}

.links-preview-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.links-preview-header h3::before {
    content: '\f0c1';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
}

.links-preview-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.links-preview-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.no-links-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.no-links-message i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-links-message p {
    font-size: 0.875rem;
    margin: 0;
}

.link-item {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.link-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.link-item:last-child {
    margin-bottom: 0;
}

.link-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.link-url {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin: 0;
    word-break: break-all;
    font-family: monospace;
}

.link-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.avatar-status-main {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.avatar-status-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator-main {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator-main.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator-main.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator-main.error {
    background: var(--danger-color);
}

/* Back to Chat Button */
.back-to-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.back-to-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.back-to-chat-btn i {
    font-size: 0.875rem;
}

/* Resize handle for avatar panel */
.avatar-resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    cursor: ew-resize;
    opacity: 0;
    transition: var(--transition-fast);
}

.avatar-chat-panel:hover .avatar-resize-handle {
    opacity: 1;
}

.avatar-resize-handle:hover {
    opacity: 1;
    background: var(--secondary-color);
}

.avatar-chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.avatar-chat-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar-chat-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.avatar-chat-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.avatar-chat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-selection {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.avatar-selection h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.avatar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.avatar-option {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-option::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.avatar-option:hover::after {
    opacity: 1;
}

.avatar-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-image {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected .avatar-image {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-name {
    color: var(--primary-color);
}

.avatar-option.selected .avatar-name {
    color: var(--primary-color);
}

.avatar-chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-video-container {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.avatar-video {
    width: 100%;
    height: 650px;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
}

.avatar-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-status {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator.error {
    background: var(--danger-color);
}

/* Assessment styles */
.assessment-container {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.assessment-container:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.assessment-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.assessment-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.assessment-results {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--border-light);
    border-radius: var(--border-radius-lg);
}

.assessment-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.assessment-results-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-results-score {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.assessment-results-summary {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-results-feedback {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

.assessment-question {
    margin-bottom: 1rem;
}

.assessment-question-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.assessment-question-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.assessment-question-evaluation {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.assessment-question-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-md);
    margin-left: 0.5rem;
}

.assessment-question-status.correct {
    background: var(--success-color);
    color: white;
}

.assessment-question-status.incorrect {
    background: var(--danger-color);
    color: white;
}

.assessment-question-status.skipped {
    background: var(--warning-color);
    color: white;
}

.assessment-question-points {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.assessment-question-score {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.assessment-question-correct-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-correct-answer span {
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-question-user-answer {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-user-answer span {
    font-weight: 600;
    color: var(--text-primary);
}

.assessment-question-explanation {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.assessment-question-explanation p {
    margin: 0;
}

.assessment-question-explanation ul,
.assessment-question-explanation ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.assessment-question-explanation li {
    margin-bottom: 0.25rem;
}

.assessment-question-explanation code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
}

.assessment-question-explanation a {
.nav-instance {
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    position: relative;
    flex-shrink: 0;
    top: 0;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: 40px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.nav-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.ai-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.user-welcome:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    border: 2px solid white;
}

.welcome-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: 352px 1fr 420px;
    height: calc(100vh - 80px);
    gap: 0;
    transition: var(--transition-normal);
}

.main-layout.collapsed {
    grid-template-columns: 60px 1fr 420px;
}

/* Conversation History Panel */
.conversation-panel {
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.main-layout.collapsed .conversation-panel {
    width: 60px;
}

.main-layout.collapsed .conversation-panel .conversation-content {
    display: none;
}

.main-layout.collapsed .conversation-panel .conversation-toggle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.conversation-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-normal);
}

.conversation-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    position: relative;
    padding-left: 3.5rem; /* Make room for toggle button on the left */
}

.conversation-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.3;
}

.conversation-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.conversation-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.conversation-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.conversation-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    z-index: 100;
}

.main-layout.collapsed .conversation-toggle {
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.collapsed .conversation-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.new-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-chat-btn i {
    font-size: 1rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    background: linear-gradient(180deg, var(--surface-color) 0%, var(--background-color) 100%);
}

.conversation-stats {
    padding: 1rem 1.25rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

.session-card {
    background: var(--surface-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.session-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.session-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.session-card:hover::before {
    width: 4px;
}

.session-card.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    box-shadow: var(--shadow-md);
}

.session-card.active::before {
    width: 4px;
}

.session-header {
    display: flex;
    align-items: center;
    justify-content: between;
    margin-bottom: 0.75rem;
}

.session-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    margin-right: 1rem;
    box-shadow: var(--shadow-sm);
}

.session-preview {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 500;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
}

.session-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-time i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.session-count {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-count i {
    font-size: 0.75rem;
}

.no-sessions {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.no-sessions i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-sessions h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.no-sessions p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Chat Area */
.chat-section {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    position: relative;
}

.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
    min-height: 0; /* Allow flex item to shrink */
    max-height: 100%; /* Prevent exceeding container */
    scroll-behavior: smooth; /* Add smooth scrolling */
    min-height: 300px; /* Ensures minimum usable height */
}

.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-message .message-avatar {
    background: var(--chat-user-bg);
    color: white;
}

.bot-message .message-avatar {
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
}

/* Bot avatar specific styling for tutoring theme */
.bot-message .message-avatar i {
    font-size: 1rem;
}

.message-bubble {
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.user-message .message-bubble {
    background: var(--chat-user-bg);
    color: white;
    border: none;
    border-bottom-right-radius: var(--border-radius-sm);
}

.bot-message .message-bubble {
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-bubble:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.message-content {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 1rem 0 0.5rem 0;
}

.message-content h3 {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message-content a {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    cursor: pointer;
}

.message-content a:hover {
    color: var(--secondary-color) !important;
    text-decoration: none !important;
    background-color: rgba(102, 126, 234, 0.1);
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
}

.user-message .message-content a {
    color: rgba(255, 255, 255, 0.9) !important;
}

.user-message .message-content a:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--text-primary);
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.message-content th,
.message-content td {
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    line-height: 1.5;
}

.message-content th {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message-content td {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.message-content tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.message-content tr:last-child td {
    border-bottom: none;
}

.user-message .message-content table {
    background: rgba(255, 255, 255, 0.1);
}

.user-message .message-content th {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.user-message .message-content td {
    color: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.user-message .message-content tr:hover {
    background: rgba(255, 255, 255, 0.1);
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.7;
}

.user-message .message-timestamp {
    color: rgba(255, 255, 255, 0.8);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0;
    animation: fadeIn 0.3s ease-out;
}

.typing-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.typing-avatar i {
    font-size: 1rem;
}

.typing-bubble {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    border-bottom-left-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 0.25rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0.32s; }

/* Input Area */
.chat-input {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.message-input {
    width: 100%;
    min-height: 2.75rem;
    max-height: 8rem;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    resize: none;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--surface-color);
    transition: var(--transition-fast);
    outline: none;
}

.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.message-input::placeholder {
    color: var(--text-muted);
}

.send-button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.send-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.send-button:active {
    transform: translateY(0) scale(0.98);
}

/* Microphone Button */
.microphone-button {
    background: var(--surface-color);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.microphone-button:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.microphone-button:active,
.microphone-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.microphone-button.recording {
    background: var(--primary-gradient);
    color: #fff;
    border-color: var(--primary-gradient);
    animation: pulse 1.2s infinite;
}

/* TTS Button */
.tts-button {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    opacity: 0;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.message:hover .tts-button {
    opacity: 1;
}

.tts-button:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.tts-button:active,
.tts-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

.tts-button.playing {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Make message bubbles relative for TTS button positioning */
.message-bubble {
    position: relative;
}

/* Voice Chat Button Styles */
#liveVoiceChatBtn {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

#liveVoiceChatBtn:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#liveVoiceChatBtn:active,
#liveVoiceChatBtn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

#liveVoiceChatBtn.active {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Right Panel - Suggestions & Actions */
.suggestions-panel {
    background: var(--surface-color);
    border-left: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 0;
}

.panel-header {
    padding: 1.5rem 1.5rem 0;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    flex-shrink: 0;
    top: 0;
    z-index: 10;
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.panel-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    line-height: 1.5;
}

.panel-content {
    padding: 1.5rem;
    flex: 1;
}

.panel-section {
    margin-bottom: 1.5rem;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.panel-section:last-child {
    margin-bottom: 0;
}

.panel-section.collapsed {
    margin-bottom: 0.75rem;
}

.section-header {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.section-header:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
}

.panel-section.collapsed .section-header {
    border-bottom: none;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
}

.section-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.panel-section.collapsed .section-icon {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

.section-info {
    flex: 1;
    min-width: 0;
}

.section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.panel-section.collapsed .section-title {
    font-size: 0.85rem;
    margin: 0;
}

.section-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.panel-section.collapsed .section-subtitle {
    font-size: 0.65rem;
}

.section-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.panel-section.collapsed .section-toggle {
    transform: rotate(-90deg);
}

.section-content {
    padding: 1.25rem;
    transition: var(--transition-normal);
    max-height: 1000px;
    opacity: 1;
}

.panel-section.collapsed .section-content {
    max-height: 0;
    padding: 0 1.25rem;
    opacity: 0;
    overflow: hidden;
}

.section-summary {
    display: none;
    padding: 0.5rem 1rem 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.panel-section.collapsed .section-summary {
    display: block;
}

/* Suggestion Cards */
.suggestion-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

.suggestion-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.suggestion-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.suggestion-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.suggestion-card:hover::before {
    height: 4px;
}

.suggestion-card.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-color: var(--primary-color);
}

.suggestion-card.featured::before {
    height: 4px;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.suggestion-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.card-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    gap: 0.75rem;
}

.action-item {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.action-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.action-item:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-color: var(--primary-color);
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.action-item:hover::before {
    width: 4px;
}

.action-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.action-content {
    flex: 1;
}

.action-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
}

.action-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0.25rem 0 0 0;
    line-height: 1.4;
}

.action-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: auto;
    box-shadow: var(--shadow-sm);
}

/* Agent Cards */
.agent-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.agent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.agent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.agent-card:hover::before {
    opacity: 1;
}

.agent-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.agent-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.agent-info {
    flex: 1;
}

.agent-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.agent-role {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.agent-status {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1.5rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 1;
    white-space: nowrap;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.agent-status i {
    font-size: 0.75rem;
    animation: pulse 2s infinite;
}

.agent-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    position: relative;
    z-index: 1;
}

.agent-features {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.feature-tag {
    background: var(--border-light);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Specific Agent Colors */
.agent-card.roleplay .agent-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.agent-card.assessment .agent-avatar {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.agent-card.scoring .agent-avatar {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.agent-card.knowledge .agent-avatar {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.agent-card.content .agent-avatar {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.agent-card.certificate .agent-avatar {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

/* Forms */
.form-container {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
    animation: fadeInUp 0.4s ease-out;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 100;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    transition: var(--transition-fast);
    background: var(--surface-color);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-button {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.form-button:active {
    transform: translateY(0);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
        width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--surface-elevated);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.4s ease-out;
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 0.5rem 0;
}

.modal-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.error-message {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    margin-top: 1rem;
        display: flex;
        align-items: center;
    gap: 0.5rem;
    border-left: 4px solid #dc2626;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: 320px 1fr 380px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 380px;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 300px 1fr 350px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 350px;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }
    
    .conversation-panel,
    .suggestions-panel {
        display: none;
    }
    
    .nav-instance {
        padding: 1rem;
    }
    
    .chat-messages {
        padding: 1rem;
    }
    
    .chat-input {
        padding: 1rem;
    }

    /* Avatar chat panel responsive */
    .avatar-chat-panel {
        width: 100%;
        right: -100%;
    }

    .avatar-chat-panel.open {
        right: 0;
    }

    .avatar-grid {
        grid-template-columns: 1fr;
    }

    .avatar-video {
        height: 50vh;
    }
}

@media (max-width: 768px) {
    .nav-instance {
        padding: 0.75rem;
    }
    
    .nav-title {
        font-size: 1.1rem;
    }
    
    .chat-header {
        padding: 1rem;
    }
    
    .chat-title h3 {
        font-size: 1.25rem;
    }
    
    .chat-subtitle {
        display: none;
    }
    
    .message {
        max-width: 95%;
    }
    
    .chat-messages {
        padding: 1rem;
        gap: 1rem;
    }

    /* Hide avatar chat button text on very small screens */
    .avatar-chat-btn span {
        display: none;
    }

    .avatar-chat-btn {
        padding: 0.5rem;
        margin-left: 0.5rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.visible {
        display: block !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

.bounce-in {
    animation: bounce 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Focus States */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive Design for Split Layout */
@media (max-width: 1024px) {
    .chat-messages.avatar-active {
        flex-direction: column;
    }

    .avatar-video-section,
    .links-preview-section {
        width: 100%;
    }

    .avatar-video-section {
        height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }

    .links-preview-section {
        border-left: none;
        border-top: 1px solid var(--border-light);
    }

    .avatar-grid-main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Chat Header */
.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2V6h4V4H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Avatar Chat Button */
.avatar-chat-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(10px);
    margin-left: 1rem;
}

.avatar-chat-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.avatar-chat-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-chat-btn:disabled:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: none;
    box-shadow: none;
}

.avatar-chat-btn i {
    font-size: 1rem;
}

/* Avatar Chat Panel */
.avatar-chat-panel {
    position: fixed;
    top: 0;
    right: -500px;
    width: 500px;
    height: 100vh;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: horizontal;
    min-width: 400px;
    max-width: 800px;
}

.avatar-chat-panel.open {
    right: 0;
}

/* Transformed Chat Messages Area */
.chat-messages.avatar-mode {
    display: flex;
    flex-direction: column;
    padding: 0;
    background: var(--surface-color);
}

.avatar-selection-container {
    padding: 2rem;
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--border-light);
    text-align: center;
}

.avatar-selection-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.avatar-selection-container p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0 0 2rem 0;
}

.avatar-grid-main {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.avatar-option-main {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option-main:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option-main.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-image-main {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-image-main {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected .avatar-image-main {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name-main {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-name-main {
    color: var(--primary-color);
}

.avatar-option-main.selected .avatar-name-main {
    color: var(--primary-color);
}

/* Split Layout for Avatar + Chat */
.chat-messages.avatar-active {
    display: flex;
    flex-direction: row;
    padding: 0;
    background: var(--surface-color);
}

.avatar-video-section {
    width: 50%;
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: relative;
}

.avatar-video-main {
    flex: 1;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin: 1rem;
    box-shadow: var(--shadow-md);
}

.avatar-video-main video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls-main {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group-main {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input-main {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input-main:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn-main {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn-main:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn-main:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.chat-content-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
}

.chat-messages-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
}

.chat-input-section {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Links Preview Section */
.links-preview-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
}

.links-preview-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
}

.links-preview-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.links-preview-header h3::before {
    content: '\f0c1';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
}

.links-preview-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.links-preview-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.no-links-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.no-links-message i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-links-message p {
    font-size: 0.875rem;
    margin: 0;
}

.link-item {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.link-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.link-item:last-child {
    margin-bottom: 0;
}

.link-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.link-url {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin: 0;
    word-break: break-all;
    font-family: monospace;
}

.link-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.avatar-status-main {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.avatar-status-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator-main {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator-main.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator-main.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator-main.error {
    background: var(--danger-color);
}

/* Back to Chat Button */
.back-to-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.back-to-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.back-to-chat-btn i {
    font-size: 0.875rem;
}

/* Resize handle for avatar panel */
.avatar-resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    cursor: ew-resize;
    opacity: 0;
    transition: var(--transition-fast);
}

.avatar-chat-panel:hover .avatar-resize-handle {
    opacity: 1;
}

.avatar-resize-handle:hover {
    opacity: 1;
    background: var(--secondary-color);
}

.avatar-chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.avatar-chat-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar-chat-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.avatar-chat-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.avatar-chat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-selection {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.avatar-selection h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.avatar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.avatar-option {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-option::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.avatar-option:hover::after {
    opacity: 1;
}

.avatar-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-image {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected .avatar-image {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-name {
    color: var(--primary-color);
}

.avatar-option.selected .avatar-name {
    color: var(--primary-color);
}

.avatar-chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-video-container {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.avatar-video {
    width: 100%;
    height: 650px;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
}

.avatar-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-status {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator.error {
.nav-instance {
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    position: relative;
    flex-shrink: 0;
    top: 0;
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    justify-content: space-between;
    transition: var(--transition-normal);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: 40px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
}

.nav-title {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.ai-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s infinite;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    cursor: pointer;
}

.user-welcome:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    border: 2px solid white;
}

.welcome-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.025em;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: 352px 1fr 420px;
    height: calc(100vh - 80px);
    gap: 0;
    transition: var(--transition-normal);
}

.main-layout.collapsed {
    grid-template-columns: 60px 1fr 420px;
}

/* Conversation History Panel */
.conversation-panel {
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition-normal);
    position: relative;
}

.main-layout.collapsed .conversation-panel {
    width: 60px;
}

.main-layout.collapsed .conversation-panel .conversation-content {
    display: none;
}

.main-layout.collapsed .conversation-panel .conversation-toggle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.conversation-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-normal);
}

.conversation-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    position: relative;
    padding-left: 3.5rem; /* Make room for toggle button on the left */
}

.conversation-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0.3;
}

.conversation-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.conversation-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.conversation-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.conversation-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.conversation-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: absolute;
    top: 1.5rem;
    left: 1rem;
    z-index: 100;
}

.main-layout.collapsed .conversation-toggle {
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.collapsed .conversation-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.conversation-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

.new-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.new-chat-btn i {
    font-size: 1rem;
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    background: linear-gradient(180deg, var(--surface-color) 0%, var(--background-color) 100%);
}

.conversation-stats {
    padding: 1rem 1.25rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stats-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-item i {
    color: var(--primary-color);
    font-size: 1rem;
}

.session-card {
    background: var(--surface-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.session-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.session-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.session-card:hover::before {
    width: 4px;
}

.session-card.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    box-shadow: var(--shadow-md);
}

.session-card.active::before {
    width: 4px;
}

.session-header {
    display: flex;
    align-items: center;
    justify-content: between;
    margin-bottom: 0.75rem;
}

.session-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    margin-right: 1rem;
    box-shadow: var(--shadow-sm);
}

.session-preview {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 500;
}

.session-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
}

.session-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.session-time i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

.session-count {
    background: var(--primary-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.session-count i {
    font-size: 0.75rem;
}

.no-sessions {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-muted);
}

.no-sessions i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-sessions h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.no-sessions p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Chat Area */
.chat-section {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    position: relative;
}

.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
    min-height: 0; /* Allow flex item to shrink */
    max-height: 100%; /* Prevent exceeding container */
    scroll-behavior: smooth; /* Add smooth scrolling */
    min-height: 300px; /* Ensures minimum usable height */
}

.message {
    display: flex;
    gap: 0.75rem;
    animation: fadeInUp 0.4s ease-out;
    max-width: 85%;
}

.message.user-message {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.bot-message {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-message .message-avatar {
    background: var(--chat-user-bg);
    color: white;
}

.bot-message .message-avatar {
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
}

/* Bot avatar specific styling for tutoring theme */
.bot-message .message-avatar i {
    font-size: 1rem;
}

.message-bubble {
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    border: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.user-message .message-bubble {
    background: var(--chat-user-bg);
    color: white;
    border: none;
    border-bottom-right-radius: var(--border-radius-sm);
}

.bot-message .message-bubble {
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-bubble:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.message-content {
    line-height: 1.6;
    word-wrap: break-word;
}

.message-content strong {
    font-weight: 600;
}

.message-content h1,
.message-content h2,
.message-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 1rem 0 0.5rem 0;
}

.message-content h3 {
    font-size: 1.1rem;
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 0.5rem;
}

.message-content p {
    margin: 0.75rem 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
    list-style-type: disc;
}

.message-content li {
    margin: 0.25rem 0;
    line-height: 1.5;
}

.message-content a {
    color: var(--primary-color) !important;
    text-decoration: underline !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    cursor: pointer;
}

.message-content a:hover {
    color: var(--secondary-color) !important;
    text-decoration: none !important;
    background-color: rgba(102, 126, 234, 0.1);
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
}

.user-message .message-content a {
    color: rgba(255, 255, 255, 0.9) !important;
}

.user-message .message-content a:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.2);
}

.message-content code {
    background: var(--border-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--text-primary);
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.message-content th,
.message-content td {
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    line-height: 1.5;
}

.message-content th {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message-content td {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.message-content tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

.message-content tr:last-child td {
    border-bottom: none;
}

.user-message .message-content table {
    background: rgba(255, 255, 255, 0.1);
}

.user-message .message-content th {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.user-message .message-content td {
    color: rgba(255, 255, 255, 0.9);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.user-message .message-content tr:hover {
    background: rgba(255, 255, 255, 0.1);
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    opacity: 0.7;
}

.user-message .message-timestamp {
    color: rgba(255, 255, 255, 0.8);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0;
    animation: fadeIn 0.3s ease-out;
}

.typing-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-elevated);
    color: var(--primary-color);
    border: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.typing-avatar i {
    font-size: 1rem;
}

.typing-bubble {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    border-bottom-left-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 0.25rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0.32s; }

/* Input Area */
.chat-input {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.message-input {
    width: 100%;
    min-height: 2.75rem;
    max-height: 8rem;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    resize: none;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--surface-color);
    transition: var(--transition-fast);
    outline: none;
}

.message-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.message-input::placeholder {
    color: var(--text-muted);
}

.send-button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.send-button:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.send-button:active {
    transform: translateY(0) scale(0.98);
}

/* Microphone Button */
.microphone-button {
    background: var(--surface-color);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.microphone-button:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.microphone-button:active,
.microphone-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.microphone-button.recording {
    background: var(--primary-gradient);
    color: #fff;
    border-color: var(--primary-gradient);
    animation: pulse 1.2s infinite;
}

/* TTS Button */
.tts-button {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    opacity: 0;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.message:hover .tts-button {
    opacity: 1;
}

.tts-button:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.tts-button:active,
.tts-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

.tts-button.playing {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Make message bubbles relative for TTS button positioning */
.message-bubble {
    position: relative;
}

/* Voice Chat Button Styles */
#liveVoiceChatBtn {
    background: var(--surface-color);
    border: 2px solid var(--success-color);
    color: var(--success-color);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-right: 0.5rem;
    box-shadow: var(--shadow-sm);
}

#liveVoiceChatBtn:hover {
    background: var(--success-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#liveVoiceChatBtn:active,
#liveVoiceChatBtn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.15);
}

#liveVoiceChatBtn.active {
    background: var(--success-gradient);
    color: #fff;
    border-color: var(--success-gradient);
    animation: pulse 1.2s infinite;
}

/* Right Panel - Suggestions & Actions */
.suggestions-panel {
    background: var(--surface-color);
    border-left: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 0;
}

.panel-header {
    padding: 1.5rem 1.5rem 0;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    flex-shrink: 0;
    top: 0;
    z-index: 10;
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.panel-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    line-height: 1.5;
}

.panel-content {
    padding: 1.5rem;
    flex: 1;
}

.panel-section {
    margin-bottom: 1.5rem;
    background: var(--surface-elevated);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.panel-section:last-child {
    margin-bottom: 0;
}

.panel-section.collapsed {
    margin-bottom: 0.75rem;
}

.section-header {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.section-header:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
}

.panel-section.collapsed .section-header {
    border-bottom: none;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
}

.section-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.panel-section.collapsed .section-icon {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
}

.section-info {
    flex: 1;
    min-width: 0;
}

.section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.panel-section.collapsed .section-title {
    font-size: 0.85rem;
    margin: 0;
}

.section-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.panel-section.collapsed .section-subtitle {
    font-size: 0.65rem;
}

.section-toggle {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.panel-section.collapsed .section-toggle {
    transform: rotate(-90deg);
}

.section-content {
    padding: 1.25rem;
    transition: var(--transition-normal);
    max-height: 1000px;
    opacity: 1;
}

.panel-section.collapsed .section-content {
    max-height: 0;
    padding: 0 1.25rem;
    opacity: 0;
    overflow: hidden;
}

.section-summary {
    display: none;
    padding: 0.5rem 1rem 0.75rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.panel-section.collapsed .section-summary {
    display: block;
}

/* Suggestion Cards */
.suggestion-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

.suggestion-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
}

.suggestion-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.suggestion-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.suggestion-card:hover::before {
    height: 4px;
}

.suggestion-card.featured {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    border-color: var(--primary-color);
}

.suggestion-card.featured::before {
    height: 4px;
}

.card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.suggestion-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.card-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.5;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    gap: 0.75rem;
}

.action-item {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem 1.25rem;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.action-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--primary-gradient);
    transition: var(--transition-normal);
}

.action-item:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    border-color: var(--primary-color);
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.action-item:hover::before {
    width: 4px;
}

.action-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.action-content {
    flex: 1;
}

.action-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.4;
}

.action-description {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0.25rem 0 0 0;
    line-height: 1.4;
}

.action-badge {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-left: auto;
    box-shadow: var(--shadow-sm);
}

/* Agent Cards */
.agent-card {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.agent-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.agent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}
    /* Focus Mode Toggle Styles */
    .focus-mode-toggle {
        margin-right: 1rem;
    }

    .focus-mode-btn {
        background: var(--surface-color);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        cursor: pointer;
        padding: 0.5rem 1rem;
        border-radius: var(--border-radius-sm);
        transition: var(--transition-fast);
        display: flex;
        align-items: center;
        gap: 0.5rem;
        font-size: 0.875rem;
        font-weight: 500;
    }

    .focus-mode-btn:hover {
        background: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
        box-shadow: var(--shadow-sm);
        transform: translateY(-1px);
    }

    .focus-mode-btn.active {
        background: var(--primary-gradient);
        color: white;
        border-color: transparent;
        box-shadow: var(--shadow-md);
    }

    .focus-mode-btn.active:hover {
        background: var(--secondary-gradient);
        transform: translateY(-1px);
    }

    .focus-mode-btn i {
        font-size: 1rem;
        transition: var(--transition-fast);
    }

    .focus-mode-btn.active i {
        animation: pulse 2s infinite;
    }
.agent-card:hover::before {
    opacity: 1;
}

.agent-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.agent-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.agent-info {
    flex: 1;
}

.agent-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.2;
}

.agent-role {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.agent-status {
    background: var(--success-gradient);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1.5rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow-sm);
    flex-shrink: 1;
    white-space: nowrap;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.agent-status i {
    font-size: 0.75rem;
    animation: pulse 2s infinite;
}

.agent-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    position: relative;
    z-index: 1;
}

.agent-features {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.feature-tag {
    background: var(--border-light);
    color: var(--text-muted);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Specific Agent Colors */
.agent-card.roleplay .agent-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.agent-card.assessment .agent-avatar {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.agent-card.scoring .agent-avatar {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.agent-card.knowledge .agent-avatar {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.agent-card.content .agent-avatar {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.agent-card.certificate .agent-avatar {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

/* Forms */
.form-container {
    background: var(--surface-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    margin-top: 1rem;
    animation: fadeInUp 0.4s ease-out;
}

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 100;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    transition: var(--transition-fast);
    background: var(--surface-color);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-button {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.form-button:active {
    transform: translateY(0);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
        width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--surface-elevated);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    animation: fadeInUp 0.4s ease-out;
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 0.5rem 0;
}

.modal-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.error-message {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    margin-top: 1rem;
        display: flex;
        align-items: center;
    gap: 0.5rem;
    border-left: 4px solid #dc2626;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: 320px 1fr 380px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 380px;
    }
}

@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 300px 1fr 350px;
    }
    
    .main-layout.collapsed {
        grid-template-columns: 60px 1fr 350px;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }
    
    .conversation-panel,
    .suggestions-panel {
        display: none;
    }
    
    .nav-instance {
        padding: 1rem;
    }
    
    .chat-messages {
        padding: 1rem;
    }
    
    .chat-input {
        padding: 1rem;
    }

    /* Avatar chat panel responsive */
    .avatar-chat-panel {
        width: 100%;
        right: -100%;
    }

    .avatar-chat-panel.open {
        right: 0;
    }

    .avatar-grid {
        grid-template-columns: 1fr;
    }

    .avatar-video {
        height: 50vh;
    }
}

@media (max-width: 768px) {
    .nav-instance {
        padding: 0.75rem;
    }
    
    .nav-title {
        font-size: 1.1rem;
    }
    
    .chat-header {
        padding: 1rem;
    }
    
    .chat-title h3 {
        font-size: 1.25rem;
    }
    
    .chat-subtitle {
        display: none;
    }
    
    .message {
        max-width: 95%;
    }
    
    .chat-messages {
        padding: 1rem;
        gap: 1rem;
    }

    /* Hide avatar chat button text on very small screens */
    .avatar-chat-btn span {
        display: none;
    }

    .avatar-chat-btn {
        padding: 0.5rem;
        margin-left: 0.5rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.visible {
        display: block !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in {
    animation: slideIn 0.4s ease-out;
}

.bounce-in {
    animation: bounce 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Focus States */
.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Responsive Design for Split Layout */
@media (max-width: 1024px) {
    .chat-messages.avatar-active {
        flex-direction: column;
    }

    .avatar-video-section,
    .links-preview-section {
        width: 100%;
    }

    .avatar-video-section {
        height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
    }

    .links-preview-section {
        border-left: none;
        border-top: 1px solid var(--border-light);
    }

    .avatar-grid-main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Chat Header */
.chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.1"><path d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/></g></g></svg>') repeat;
    opacity: 0.1;
}

.chat-header-content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.chat-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chat-title {
    flex: 1;
}

.chat-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    letter-spacing: -0.025em;
}

.chat-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 400;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    backdrop-filter: blur(10px);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: #ef4444;
    animation: none;
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Avatar Chat Button */
.avatar-chat-btn {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    backdrop-filter: blur(10px);
    margin-left: 1rem;
}

.avatar-chat-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.avatar-chat-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-chat-btn:disabled:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: none;
    box-shadow: none;
}

.avatar-chat-btn i {
    font-size: 1rem;
}

/* Avatar Chat Panel */
.avatar-chat-panel {
    position: fixed;
    top: 0;
    right: -500px;
    width: 500px;
    height: 100vh;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: horizontal;
    min-width: 400px;
    max-width: 800px;
}

.avatar-chat-panel.open {
    right: 0;
}

/* Transformed Chat Messages Area */
.chat-messages.avatar-mode {
    display: flex;
    flex-direction: column;
    padding: 0;
    background: var(--surface-color);
}

.avatar-selection-container {
    padding: 2rem;
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--border-light);
    text-align: center;
}

.avatar-selection-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.avatar-selection-container p {
    font-size: 1rem;
    color: var(--text-muted);
    margin: 0 0 2rem 0;
}

.avatar-grid-main {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.avatar-option-main {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option-main:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option-main.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-image-main {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-image-main {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option-main.selected .avatar-image-main {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name-main {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option-main:hover .avatar-name-main {
    color: var(--primary-color);
}

.avatar-option-main.selected .avatar-name-main {
    color: var(--primary-color);
}

/* Split Layout for Avatar + Chat */
.chat-messages.avatar-active {
    display: flex;
    flex-direction: row;
    padding: 0;
    background: var(--surface-color);
}

.avatar-video-section {
    width: 50%;
    background: var(--surface-color);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    position: relative;
}

.avatar-video-main {
    flex: 1;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
    border: 3px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin: 1rem;
    box-shadow: var(--shadow-md);
}

.avatar-video-main video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls-main {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group-main {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input-main {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input-main:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn-main {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn-main:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn-main:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.chat-content-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--background-color);
}

.chat-messages-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--surface-color) 100%);
}

.chat-input-section {
    padding: 1.5rem 2rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    position: relative;
    flex-shrink: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Links Preview Section */
.links-preview-section {
    width: 50%;
    display: flex;
    flex-direction: column;
    background: var(--surface-elevated);
    border-left: 1px solid var(--border-light);
}

.links-preview-header {
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, var(--surface-elevated) 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--border-light);
}

.links-preview-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.links-preview-header h3::before {
    content: '\f0c1';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
}

.links-preview-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.links-preview-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.no-links-message {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.no-links-message i {
    font-size: 3rem;
    color: var(--border-color);
    margin-bottom: 1rem;
    display: block;
}

.no-links-message p {
    font-size: 0.875rem;
    margin: 0;
}

.link-item {
    background: var(--surface-color);
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.link-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.link-item:last-child {
    margin-bottom: 0;
}

.link-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
}

.link-url {
    font-size: 0.75rem;
    color: var(--primary-color);
    margin: 0;
    word-break: break-all;
    font-family: monospace;
}

.link-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

.avatar-status-main {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.avatar-status-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator-main {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator-main.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator-main.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator-main.error {
    background: var(--danger-color);
}

/* Back to Chat Button */
.back-to-chat-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
}

.back-to-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.back-to-chat-btn i {
    font-size: 0.875rem;
}

/* Resize handle for avatar panel */
.avatar-resize-handle {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
    cursor: ew-resize;
    opacity: 0;
    transition: var(--transition-fast);
}

.avatar-chat-panel:hover .avatar-resize-handle {
    opacity: 1;
}

.avatar-resize-handle:hover {
    opacity: 1;
    background: var(--secondary-color);
}

.avatar-chat-header {
    background: var(--primary-gradient);
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.avatar-chat-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.avatar-chat-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.avatar-chat-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.avatar-chat-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-selection {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.avatar-selection h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 1rem 0;
}

.avatar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.avatar-option {
    background: var(--surface-color);
    border: 3px solid var(--border-light);
    border-radius: var(--border-radius-xl);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.avatar-option:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.08) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-option.selected::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.avatar-option::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(102, 126, 234, 0.05) 100%);
    opacity: 0;
    transition: var(--transition-normal);
}

.avatar-option:hover::after {
    opacity: 1;
}

.avatar-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--border-light);
    transition: var(--transition-normal);
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-image {
    border-color: var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.avatar-option.selected .avatar-image {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.avatar-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    position: relative;
    z-index: 1;
}

.avatar-option:hover .avatar-name {
    color: var(--primary-color);
}

.avatar-option.selected .avatar-name {
    color: var(--primary-color);
}

.avatar-chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.avatar-video-container {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.avatar-video {
    width: 100%;
    height: 650px;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    position: relative;
    overflow: hidden;
}

.avatar-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.avatar-controls {
    padding: 1rem 1.5rem;
    background: var(--surface-elevated);
    border-top: 1px solid var(--border-light);
}

.avatar-input-group {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.avatar-input {
    flex: 1;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    font-size: 0.875rem;
    resize: none;
    min-height: 2.75rem;
    max-height: 6rem;
    background: var(--surface-color);
    transition: var(--transition-fast);
}

.avatar-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.avatar-send-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.avatar-send-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-md);
}

.avatar-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.avatar-status {
    padding: 0.75rem 1.5rem;
    background: var(--border-light);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.avatar-status-indicator.connected {
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.avatar-status-indicator.connecting {
    background: var(--warning-color);
    animation: pulse 1s infinite;
}

.avatar-status-indicator.error {
    background: var(--danger-color);
}

/* Enhanced Link Previews */
.enhanced-link-item {
    background: var(--surface-color);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.enhanced-link-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.enhanced-link-item:last-child {
    margin-bottom: 0;
}

/* YouTube Video Embed */
.youtube-embed-container {
    position: relative;
    background: #000;
}

.youtube-embed {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
}

.youtube-embed iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.youtube-thumbnail {
    position: relative;
    cursor: pointer;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.youtube-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.youtube-play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 68px;
    height: 48px;
    background: rgba(255, 0, 0, 0.8);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.youtube-play-button:hover {
    background: rgba(255, 0, 0, 1);
    transform: translate(-50%, -50%) scale(1.1);
}

.youtube-play-button i {
    color: white;
    font-size: 1.5rem;
    margin-left: 4px;
}

.video-info {
    padding: 1rem;
    background: var(--surface-elevated);
}

.video-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-channel {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0 0 0.5rem 0;
}

.video-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Article Preview */
.article-preview {
    display: flex;
    flex-direction: column;
}

.article-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.article-content {
    padding: 1.25rem;
}

.article-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.75rem 0;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0 0 1rem 0;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-light);
}

.article-domain {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.article-domain i {
    color: var(--primary-color);
}

.article-cta {
    background: var(--primary-gradient);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.article-cta:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* PDF and Document Previews */
.document-preview {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.document-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.document-info {
    flex: 1;
}

.document-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.3;
}

.document-type {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* Source Links Container */
.sources-container {
    margin-top: 1.5rem;
    padding: 1rem 0;
    border-top: 2px solid var(--border-light);
}

.sources-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.sources-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.source-item {
    background: var(--border-light);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.75rem;
    transition: var(--transition-fast);
    cursor: pointer;
}

.source-item:hover {
    background: var(--surface-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.source-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    line-height: 1.3;
}

.source-url {
    font-size: 0.7rem;
    color: var(--primary-color);
    margin: 0;
    font-family: monospace;
    word-break: break-all;
}

/* Enhanced Message Content Links */
.message-content .enhanced-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--border-radius-sm);
    color: var(--primary-color) !important;
    text-decoration: none !important;
    font-weight: 500 !important;
    transition: var(--transition-fast);
    margin: 0 0.1rem;
}

.message-content .enhanced-link:hover {
    background: rgba(102, 126, 234, 0.15);
    border-color: rgba(102, 126, 234, 0.3);
    transform: translateY(-1px);
}

.message-content .enhanced-link.youtube-link {
    background: rgba(255, 0, 0, 0.1);
    border-color: rgba(255, 0, 0, 0.2);
    color: #cc0000 !important;
}

.message-content .enhanced-link.youtube-link:hover {
    background: rgba(255, 0, 0, 0.15);
    border-color: rgba(255, 0, 0, 0.3);
}

.message-content .enhanced-link i {
    font-size: 0.75rem;
}

/* Override all session card styles to make them compact */
.session-card {
    background: transparent !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 0.25rem 0.5rem !important;
    margin-bottom: 0.125rem !important;
    cursor: pointer !important;
    transition: var(--transition-fast) !important;
    position: relative !important;
    overflow: hidden !important;
    display: block !important;
    box-shadow: none !important;
}

.session-card:hover {
    background: var(--surface-hover) !important;
    border-radius: var(--border-radius-sm) !important;
    transform: none !important;
    box-shadow: none !important;
}

.session-card.active {
    background: var(--primary-light) !important;
    border-radius: var(--border-radius-sm) !important;
    border-color: transparent !important;
    box-shadow: none !important;
}

.session-card::before {
    display: none !important;
}

.session-header {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    margin-bottom: 0.25rem !important;
}

.session-icon {
    width: 16px !important;
    height: 16px !important;
    background: var(--primary-color) !important;
    border-radius: 50% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: white !important;
    font-size: 0.6rem !important;
    flex-shrink: 0 !important;
    margin-right: 0 !important;
    box-shadow: none !important;
}

.session-preview {
    font-size: 0.75rem !important;
    color: var(--text-primary) !important;
    font-weight: 400 !important;
    line-height: 1.4 !important;
    margin-bottom: 0.25rem !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
}

.session-meta {
    display: flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
    font-size: 0.65rem !important;
    color: var(--text-muted) !important;
    padding-top: 0 !important;
    border-top: none !important;
}

.session-time {
    display: flex !important;
    align-items: center !important;
    gap: 0.25rem !important;
}

.session-time i {
    color: var(--text-muted) !important;
    font-size: 0.6rem !important;
}

.session-count {
    background: var(--text-muted) !important;
    color: white !important;
    padding: 0.125rem 0.375rem !important;
    border-radius: 0.75rem !important;
    font-size: 0.6rem !important;
    font-weight: 500 !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.125rem !important;
}

.session-count i {
    font-size: 0.55rem !important;
}

.conversation-list {
    padding: 0.75rem !important;
}

/* ULTRA AGGRESSIVE SESSION CARD OVERRIDES - FORCE COMPACT DESIGN */
/* Multiple selector levels to ensure these styles take precedence */

.conversation-list .session-card,
.chat-sidebar .session-card,
.sidebar-content .session-card,
div .session-card,
* .session-card {
    background: transparent !important;
    border: none !important;
    border-radius: 0 !important;
    padding: 0.25rem 0.5rem !important;
    margin: 0 !important;
    margin-bottom: 0.125rem !important;
    cursor: pointer !important;
    transition: var(--transition-fast) !important;
    position: relative !important;
    overflow: visible !important;
    display: block !important;
    box-shadow: none !important;
    min-height: auto !important;
    height: auto !important;
}

.conversation-list .session-card:hover,
.chat-sidebar .session-card:hover,
.sidebar-content .session-card:hover,
div .session-card:hover,
* .session-card:hover {
    background: var(--surface-hover) !important;
    border-radius: var(--border-radius-sm) !important;
    transform: none !important;
    box-shadow: none !important;
    border: none !important;
}

.conversation-list .session-card.active,
.chat-sidebar .session-card.active,
.sidebar-content .session-card.active,
div .session-card.active,
* .session-card.active {
    background: var(--primary-light) !important;
    border-radius: var(--border-radius-sm) !important;
    border: none !important;
    border-color: transparent !important;
    box-shadow: none !important;
}

.conversation-list .session-card::before,
.chat-sidebar .session-card::before,
.sidebar-content .session-card::before,
div .session-card::before,
* .session-card::before {
    display: none !important;
}

.conversation-list .session-header,
.chat-sidebar .session-header,
.sidebar-content .session-header,
div .session-header,
* .session-header {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    margin-bottom: 0.25rem !important;
    padding: 0 !important;
    border: none !important;
    background: transparent !important;
}

.conversation-list .session-icon,
.chat-sidebar .session-icon,
.sidebar-content .session-icon,
div .session-icon,
* .session-icon {
    width: 16px !important;
    height: 16px !important;
    min-width: 16px !important;
    min-height: 16px !important;
    max-width: 16px !important;
    max-height: 16px !important;
    background: var(--primary-color) !important;
    border-radius: 50% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: white !important;
    font-size: 0.6rem !important;
    flex-shrink: 0 !important;
    margin: 0 !important;
    margin-right: 0.5rem !important;
    box-shadow: none !important;
    border: none !important;
}

.conversation-list .session-preview,
.chat-sidebar .session-preview,
.sidebar-content .session-preview,
div .session-preview,
* .session-preview {
    font-size: 0.75rem !important;
    color: var(--text-primary) !important;
    font-weight: 400 !important;
    line-height: 1.4 !important;
    margin-bottom: 0.25rem !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 2 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    padding: 0 !important;
    border: none !important;
    background: transparent !important;
    flex: 1 !important;
}

.conversation-list .session-meta,
.chat-sidebar .session-meta,
.sidebar-content .session-meta,
div .session-meta,
* .session-meta {
    display: flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
    font-size: 0.65rem !important;
    color: var(--text-muted) !important;
    padding: 0 !important;
    padding-top: 0 !important;
    border: none !important;
    border-top: none !important;
    background: transparent !important;
    margin: 0 !important;
}

.conversation-list .session-time,
.chat-sidebar .session-time,
.sidebar-content .session-time,
div .session-time,
* .session-time {
    display: flex !important;
    align-items: center !important;
    gap: 0.25rem !important;
    font-size: 0.65rem !important;
    color: var(--text-muted) !important;
}

.conversation-list .session-time i,
.chat-sidebar .session-time i,
.sidebar-content .session-time i,
div .session-time i,
* .session-time i {
    color: var(--text-muted) !important;
    font-size: 0.6rem !important;
}

.conversation-list .session-count,
.chat-sidebar .session-count,
.sidebar-content .session-count,
div .session-count,
* .session-count {
    background: var(--text-muted) !important;
    color: white !important;
    padding: 0.125rem 0.375rem !important;
    border-radius: 0.75rem !important;
    font-size: 0.6rem !important;
    font-weight: 500 !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.125rem !important;
    min-height: auto !important;
    height: auto !important;
    border: none !important;
}

.conversation-list .session-count i,
.chat-sidebar .session-count i,
.sidebar-content .session-count i,
div .session-count i,
* .session-count i {
    font-size: 0.55rem !important;
}

/* FINAL OVERRIDE: Ultra-Minimalistic Strip Design - TINY STRIPS */
.conversation-list .session-card,
.conversation-panel .session-card,
div.session-card {
    background: transparent !important;
    border: none !important;
    border-radius: 6px !important;
    padding: 8px 12px !important;
    margin: 0 !important;
    margin-bottom: 4px !important;
    cursor: pointer !important;
    transition: background-color 0.2s ease !important;
    position: relative !important;
    overflow: hidden !important;
    display: block !important;
    min-height: 40px !important;
    max-height: 40px !important;
    height: 40px !important;
    border-left: 2px solid transparent !important;
    box-shadow: none !important;
    transform: none !important;
}

/* ABSOLUTE FINAL OVERRIDE - ENSURE TEXT SPACING */
.conversation-list .session-card .session-content {
    padding: 0 12px !important;
    padding-left: 12px !important;
    padding-right: 12px !important;
}

.conversation-list .session-card .session-preview {
    text-align: center !important;
    padding: 0 4px !important;
    padding-left: 4px !important;
    padding-right: 4px !important;
    margin: 0 !important;
    width: 100% !important;
    max-width: none !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
    box-sizing: border-box !important;
}

/* SUPER AGGRESSIVE OVERRIDE */
.conversation-list .session-card > .session-content {
    padding-left: 12px !important;
    padding-right: 12px !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
}

.conversation-list .session-card > .session-content > .session-preview {
    padding-left: 4px !important;
    padding-right: 4px !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
    text-align: center !important;
}

/* ULTIMATE NUCLEAR OPTION - MOST SPECIFIC POSSIBLE */
div.conversation-list div.session-card div.session-content {
    padding: 0 16px !important;
    box-sizing: border-box !important;
    background-color: rgba(255, 0, 0, 0.1) !important; /* Temporary red background to see if CSS works */
}

div.conversation-list div.session-card div.session-content div.session-preview {
    text-align: center !important;
    padding: 0 !important;
    margin: 0 !important;
    width: 100% !important;
    background-color: rgba(0, 255, 0, 0.1) !important; /* Temporary green background to see if CSS works */
}

/* Alternative selector in case the above doesn't work */
.conversation-list > .session-card {
    padding: 8px 4px !important;
}

.conversation-list > .session-card > .session-content {
    padding: 0 16px !important;
    background-color: rgba(255, 0, 0, 0.1) !important;
}

.conversation-list > .session-card > .session-content > .session-preview {
    text-align: center !important;
    background-color: rgba(0, 255, 0, 0.1) !important;
}

.conversation-list .session-card::before,
.conversation-panel .session-card::before,
div.session-card::before {
    display: none !important;
}

.conversation-list .session-card:hover,
.conversation-panel .session-card:hover,
div.session-card:hover {
    background: rgba(0, 0, 0, 0.02) !important;
    border-left-color: #ccc !important;
    transform: none !important;
    box-shadow: none !important;
}

.conversation-list .session-card.active,
.conversation-panel .session-card.active,
div.session-card.active {
    background: rgba(0, 0, 0, 0.04) !important;
    border-left-color: #999 !important;
    transform: none !important;
    box-shadow: none !important;
}

.conversation-list .session-header,
.conversation-panel .session-header,
div.session-header {
    display: none !important;
}

.conversation-list .session-icon,
.conversation-panel .session-icon,
div.session-icon {
    display: none !important;
}

.conversation-list .session-content,
.conversation-panel .session-content,
div.session-content {
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    position: relative !important;
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    height: 100% !important;
    gap: 8px !important;
}

.conversation-list .session-preview,
.conversation-panel .session-preview,
div.session-preview {
    font-size: 14px !important;
    color: #333 !important;
    font-weight: 500 !important;
    line-height: 1.2 !important;
    margin: 0 !important;
    display: block !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    padding: 0 !important;
    flex: 1 !important;
    white-space: nowrap !important;
    min-width: 0 !important;
}

.conversation-list .session-card:hover .session-preview,
.conversation-panel .session-card:hover .session-preview,
div.session-card:hover .session-preview {
    color: #222 !important;
}

.conversation-list .session-time,
.conversation-panel .session-time,
div.session-time {
    font-size: 12px !important;
    color: #666 !important;
    margin-left: auto !important;
    flex-shrink: 0 !important;
    opacity: 1 !important;
    font-weight: 500 !important;
    min-width: fit-content !important;
}

.conversation-list .session-time i,
.conversation-panel .session-time i,
div.session-time i {
    display: none !important;
}

/* REMOVED: ULTIMATE OVERRIDE was causing cards to be too small */

.session-card:hover,
div[class*="session-card"]:hover,
*[class*="session-card"]:hover {
    background: rgba(0, 0, 0, 0.02) !important;
    border-left-color: #ccc !important;
    transform: none !important;
    box-shadow: none !important;
}

.session-card.active,
div[class*="session-card"].active,
*[class*="session-card"].active {
    background: rgba(0, 0, 0, 0.04) !important;
    border-left-color: #999 !important;
}

.session-content {
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    position: relative !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    height: 100% !important;
}

.session-preview {
    font-size: 0.55rem !important;
    color: #333 !important;
    font-weight: 400 !important;
    line-height: 0.8rem !important;
    margin: 0 !important;
    display: -webkit-box !important;
    -webkit-line-clamp: 1 !important;
    -webkit-box-orient: vertical !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    padding: 0 !important;
    flex: 1 !important;
    white-space: nowrap !important;
}

.session-time {
    font-size: 0.45rem !important;
    color: #999 !important;
    margin-left: 0.5rem !important;
    flex-shrink: 0 !important;
    opacity: 0.8 !important;
}

.session-header,
.session-icon,
.session-meta,
.session-count {
    display: none !important;
}

.session-time i {
    display: none !important;
}
}

/* Enhanced session card styling for proper display */
.conversation-list .session-card .session-content {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    width: 100% !important;
    height: 100% !important;
    gap: 8px !important;
}

.conversation-list .session-card .session-preview {
    flex: 1 !important;
    font-size: 13px !important;
    line-height: 18px !important;
    color: #333 !important;
    font-weight: 500 !important;
    overflow: hidden !important;
    white-space: nowrap !important;
    text-overflow: ellipsis !important;
    display: block !important;
    margin: 0 4px !important;
    padding: 0 !important;
    min-width: 0 !important;
    opacity: 1 !important;
    visibility: visible !important;
    height: auto !important;
    max-width: calc(100% - 80px) !important;
    /* Override webkit properties that might interfere */
    -webkit-line-clamp: unset !important;
    -webkit-box-orient: unset !important;
    background: transparent !important;
}

.conversation-list .session-card .session-time {
    font-size: 11px !important;
    color: #888 !important;
    font-weight: 400 !important;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    margin-left: auto !important;
    min-width: 40px !important;
    text-align: right !important;
}

.conversation-list .session-card:hover .session-preview {
    color: #222 !important;
}

.conversation-list .session-card.active .session-preview {
    color: #111 !important;
    font-weight: 600 !important;
}

/* Fix for session time alignment */
.conversation-list .session-time {
    font-size: 11px !important;
    color: #666 !important;
    font-weight: 500 !important;
    flex-shrink: 0 !important;
    margin-left: auto !important;
    min-width: 40px !important;
    text-align: right !important;
    white-space: nowrap !important;
}

/* FINAL ULTIMATE OVERRIDE FOR SESSION CARD LAYOUT - HIGHEST PRIORITY */
.conversation-list .session-card,
.conversation-list div.session-card,
.conversation-panel .session-card,
.conversation-panel div.session-card {
    height: 50px !important;
    min-height: 50px !important;
    max-height: 50px !important;
    padding: 8px 4px !important;
    display: block !important;
    position: relative !important;
    overflow: hidden !important;
    box-sizing: border-box !important;
}

.conversation-list .session-card .session-content,
.conversation-list div.session-card .session-content,
.conversation-panel .session-card .session-content,
.conversation-panel div.session-card .session-content {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    height: 100% !important;
    margin: 0 !important;
    padding: 0 16px !important;
    position: relative !important;
    box-sizing: border-box !important;
}

.conversation-list .session-card .session-message-icon,
.conversation-list div.session-card .session-message-icon,
.conversation-panel .session-card .session-message-icon,
.conversation-panel div.session-card .session-message-icon {
    display: flex !important;
    align-items: center !important;
    gap: 4px !important;
    flex-shrink: 0 !important;
    color: var(--primary-color) !important;
    font-size: 14px !important;
    position: static !important;
    width: auto !important;
    height: auto !important;
    background: transparent !important;
    border-radius: 0 !important;
    margin: 0 !important;
}

.conversation-list .session-card .session-preview,
.conversation-list div.session-card .session-preview,
.conversation-panel .session-card .session-preview,
.conversation-panel div.session-card .session-preview {
    width: 100% !important;
    max-width: 100% !important;
    font-size: 14px !important;
    line-height: 18px !important;
    color: #333 !important;
    font-weight: 500 !important;
    overflow: hidden !important;
    white-space: nowrap !important;
    text-overflow: ellipsis !important;
    text-align: center !important;
    display: block !important;
    margin: 0 !important;
    padding: 0 !important;
    position: static !important;
    top: auto !important;
    left: auto !important;
    right: auto !important;
    bottom: auto !important;
    transform: none !important;
    box-sizing: border-box !important;
    -webkit-line-clamp: unset !important;
    -webkit-box-orient: unset !important;
}

.conversation-list .session-card .session-time,
.conversation-list div.session-card .session-time,
.conversation-panel .session-card .session-time,
.conversation-panel div.session-card .session-time {
    font-size: 11px !important;
    color: #666 !important;
    font-weight: 500 !important;
    flex-shrink: 0 !important;
    margin-left: auto !important;
    min-width: 40px !important;
    text-align: right !important;
    white-space: nowrap !important;
    position: static !important;
    right: auto !important;
    top: auto !important;
    transform: none !important;
    background: transparent !important;
    padding: 0 !important;
    border: none !important;
    border-radius: 0 !important;
}

.conversation-list .session-card .message-count,
.conversation-list div.session-card .message-count,
.conversation-panel .session-card .message-count,
.conversation-panel div.session-card .message-count {
    background: var(--primary-color) !important;
    color: white !important;
    font-size: 10px !important;
    font-weight: 600 !important;
    min-width: 18px !important;
    height: 18px !important;
    border-radius: 9px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 0 4px !important;
    line-height: 1 !important;
    position: static !important;
    top: auto !important;
    right: auto !important;
    transform: none !important;
}

/* ===== FINAL OVERRIDE - PLACED AT END TO OVERRIDE ALL CONFLICTING RULES ===== */
/* This MUST be at the end of the file to ensure highest CSS cascade priority */

div.conversation-list div.session-card div.session-content,
.conversation-list .session-card .session-content,
.conversation-panel .session-card .session-content {
    padding: 0 16px !important;
    padding-left: 16px !important;
    padding-right: 16px !important;
    box-sizing: border-box !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    background-color: rgba(255, 0, 0, 0.1) !important; /* Debug color */
}

div.conversation-list div.session-card div.session-preview,
.conversation-list .session-card .session-preview,
.conversation-panel .session-card .session-preview {
    text-align: center !important;
    padding: 0 !important;
    margin: 0 !important;
    width: 100% !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
    background-color: rgba(0, 255, 0, 0.1) !important; /* Debug color */
}

/* Connection status colors for user avatar - HIGH SPECIFICITY */
.user-welcome #userAvatar.user-avatar.status-online,
#userWelcome .user-avatar.status-online,
div.user-welcome div.user-avatar.status-online {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%) !important;
    border-color: #d1fae5 !important;
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2), 0 1px 3px rgba(0, 0, 0, 0.1) !important;
}

.user-welcome #userAvatar.user-avatar.status-offline,
#userWelcome .user-avatar.status-offline,
div.user-welcome div.user-avatar.status-offline {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%) !important;
    border-color: #fecaca !important;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2), 0 1px 3px rgba(0, 0, 0, 0.1) !important;
}

.user-welcome #userAvatar.user-avatar.status-connecting,
#userWelcome .user-avatar.status-connecting,
div.user-welcome div.user-avatar.status-connecting {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%) !important;
    border-color: #fef3c7 !important;
    box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2), 0 1px 3px rgba(0, 0, 0, 0.1) !important;
    animation: pulse 2s infinite !important;
}

/* Enhanced Collapsed Conversation Panel - HIGHEST SPECIFICITY OVERRIDE */
body .main-layout.collapsed .conversation-panel .conversation-content,
.main-layout.collapsed #conversationPanel .conversation-content,
div.main-layout.collapsed div.conversation-panel div.conversation-content {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 2rem 0 !important;
    gap: 1rem !important;
    height: 100% !important;
    overflow: visible !important;
}

body .main-layout.collapsed .conversation-toggle,
.main-layout.collapsed #conversationPanel .conversation-toggle,
div.main-layout.collapsed div.conversation-panel .conversation-toggle {
    position: absolute !important;
    top: 1rem !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    z-index: 10 !important;
}

/* Removed duplicate rules - using cleaner collapsed styles defined earlier */

/* Removed conflicting collapsed rules - using cleaner implementation */

/* All collapsed mode rules now handled by cleaner implementation above */

/* Count badge and stats item rules removed - handled by cleaner collapsed implementation */

/* Minimized new chat icon - properly centered with consistent sizing */
.minimized-new-chat {
    display: none;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 50px;
    padding: 0.75rem 1rem 0.75rem 4.5rem;
    margin: 0.5rem 0;
    background: var(--surface-color);
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border: none !important;
}

.minimized-new-chat i {
    font-size: 1.25rem;
    color: var(--accent-color);
}

.minimized-new-chat:hover {
    background: var(--surface-hover);
    transform: scale(1.05);
    border: none !important;
}

.main-layout.collapsed .minimized-new-chat {
    display: flex !important;
}

/* Minimized action strips when collapsed - properly centered with padding */
body .main-layout.collapsed .conversation-action-strip,
div.main-layout.collapsed .conversation-action-strip,
html .main-layout.collapsed .conversation-action-strip {
    width: 100% !important;
    height: 50px !important;
    padding: 0.75rem 1rem !important;
    margin: 0.5rem 0 !important;
    border-radius: 0.5rem !important;
    cursor: pointer !important;
    transition: var(--transition-fast) !important;
    justify-content: center !important;
    align-items: center !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    min-height: 50px !important;
    display: flex !important;
    flex-direction: row !important;
}

/* Minimized strip icons - properly centered */
body .main-layout.collapsed .strip-icon,
div.main-layout.collapsed .strip-icon,
html .main-layout.collapsed .strip-icon {
    display: flex !important;
    width: 100% !important;
    height: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    background: transparent !important;
    border-radius: 0 !important;
    justify-content: center !important;
    align-items: center !important;
}

/* Strip icon font size and color */
body .main-layout.collapsed .strip-icon i,
div.main-layout.collapsed .strip-icon i,
html .main-layout.collapsed .strip-icon i {
    font-size: 1.25rem !important;
    color: var(--accent-color) !important;
}

/* Conversation Header with Hamburger Toggle */
.conversation-header {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.75rem 0 0.5rem 0;
    border-bottom: none;
    margin-bottom: 0.5rem;
    position: sticky;
    top: 0;
    background: var(--surface-color);
    z-index: 5;
}

/* Hamburger Toggle Button */
.conversation-toggle-hamburger {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.375rem;
    transition: var(--transition-fast);
    color: var(--text-secondary);
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    position: relative;
    /* Ensure position remains static */
    transform: none !important;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    bottom: auto !important;
}

.conversation-toggle-hamburger:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.conversation-toggle-hamburger:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Custom animated hamburger icon */
.hamburger-icon {
    width: 20px;
    height: 16px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    z-index: 2;
}

.hamburger-icon span {
    display: block;
    width: 100%;
    height: 2.5px;
    background-color: currentColor;
    border-radius: 1px;
    transition: all 0.3s ease;
    transform-origin: center;
    opacity: 1;
    box-shadow: 0 0 1px rgba(0, 0, 0, 0.2);
}

/* Ensure hamburger bars are visible with fallback color */
.hamburger-icon span {
    background: var(--text-secondary, #6b7280);
}

/* Fallback icon styling */
.conversation-toggle-hamburger .fallback-icon {
    position: absolute;
    z-index: 1;
    transition: var(--transition-fast);
}

/* Hide fallback when custom hamburger is shown */
.conversation-toggle-hamburger:not(.use-fallback) .fallback-icon {
    opacity: 0;
    pointer-events: none;
}

/* Show fallback when custom hamburger fails */
.conversation-toggle-hamburger.use-fallback .hamburger-icon {
    opacity: 0;
    pointer-events: none;
}

.conversation-toggle-hamburger.use-fallback .fallback-icon {
    opacity: 1;
    pointer-events: auto;
}

/* Animation for hamburger to X transformation */
.hamburger-icon.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger-icon.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
    transition-delay: 0.1s;
}

.hamburger-icon.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hamburger icon styling */
.conversation-toggle-hamburger i {
    transition: var(--transition-fast);
}

/* When collapsed, adjust header styling but keep hamburger same size and position */
.main-layout.collapsed .conversation-header {
    padding: 0.5rem 0;
    margin-bottom: 0;
    border-bottom: none;
    /* Ensure header doesn't shift button position */
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Prevent any layout shifts */
    min-height: 50px;
    box-sizing: border-box;
}

/* Keep hamburger button same size when collapsed - FORCE with !important */
html body .main-layout.collapsed .conversation-toggle-hamburger,
html body div.main-layout.collapsed .conversation-toggle-hamburger,
body .main-layout.collapsed .conversation-toggle-hamburger,
.main-layout.collapsed #conversationPanel .conversation-toggle-hamburger {
    width: 40px !important;
    height: 40px !important;
    padding: 0.5rem !important;
    font-size: 1.25rem !important;
    min-width: 40px !important;
    min-height: 40px !important;
    max-width: 40px !important;
    max-height: 40px !important;
    /* Ensure position remains static */
    position: relative !important;
    transform: none !important;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    bottom: auto !important;
}

/* Additional force class for hamburger button */
.force-full-size,
.force-full-size.conversation-toggle-hamburger {
    width: 40px !important;
    height: 40px !important;
    padding: 0.5rem !important;
    font-size: 1.25rem !important;
    min-width: 40px !important;
    min-height: 40px !important;
    max-width: 40px !important;
    max-height: 40px !important;
}

/* Remove old conversation toggle styles */
.conversation-toggle {
    display: none !important;
}

/* Remove Quick Action Cards */
#quickActionCards, .quick-action-cards-container {
    display: none !important;
}

/* Added collapse fix: hide right suggestions panel when main layout is collapsed */
.main-layout.collapsed {
    grid-template-columns: 60px 1fr; /* remove right panel */
}

.main-layout.collapsed .suggestions-panel {
    display: none !important;
}

/* Responsive override: hide suggestions panel on medium screens */
@media (max-width: 1300px) {
    .main-layout {
        grid-template-columns: 1fr !important;
        grid-template-rows: 1fr !important; /* single full-height row */
        height: 100vh !important; /* Force full viewport height */
        min-height: 100vh !important;
    }

    .suggestions-panel {
        display: none !important;
    }

    /* Ensure left conversation panel collapses nicely on these widths */
    .conversation-panel {
        width: 60px !important;
    }
    
    .chat-section {
        height: 100% !important;
        min-height: 100% !important;
    }
}

/* Responsive FINAL override to ensure chat expands and no empty gaps */
@media (max-width: 1400px) {
    .main-layout {
        grid-template-columns: auto 1fr !important; /* left panel (if visible) + chat */
        height: 100vh !important; /* Force full viewport height */
        min-height: 100vh !important;
    }
    .suggestions-panel {
        display: none !important;
    }
    .chat-section {
        height: 100% !important;
        min-height: 100% !important;
    }
}

@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr !important; /* chat only */
        height: 100vh !important; /* Force full viewport height */
        min-height: 100vh !important;
    }
    .conversation-panel,
    .suggestions-panel {
        display: none !important;
    }
    .chat-section {
        height: 100% !important;
        min-height: 100% !important;
    }
}

/* Responsive fix: ensure chat takes full height when side panels hidden */
@media (max-width: 1024px) {
    .main-layout {
        grid-template-rows: 1fr !important; /* single row – no unused bottom row */
    }
}

/* CRITICAL FIX: Force full height for minimized windows */
@media (max-width: 1400px) {
    .main-layout {
        height: 100vh !important;
        min-height: 100vh !important;
        max-height: 100vh !important;
    }
    
    .chat-section {
        height: 100vh !important;
        min-height: 100vh !important;
        max-height: 100vh !important;
    }
    
    .chat-messages {
        flex: 1 !important;
        min-height: 0 !important;
        height: auto !important;
    }
}

/* SPLIT WINDOW FIX: Ensure chat takes full height in split-screen mode */
@media (max-width: 1400px) and (max-height: 800px) {
    .main-layout {
        height: 100vh !important;
        min-height: 100vh !important;
        max-height: 100vh !important;
    }
    
    .chat-section {
        height: 100vh !important;
        min-height: 100vh !important;
        max-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
    }
    
    .chat-messages {
        flex: 1 !important;
        min-height: 0 !important;
        height: auto !important;
        overflow-y: auto !important;
    }
    
    .chat-input {
        flex-shrink: 0 !important;
        position: relative !important;
    }
}

/* ADDITIONAL SPLIT WINDOW FIX: Handle very short viewports */
@media (max-height: 600px) {
    .main-layout {
        height: 100vh !important;
        min-height: 100vh !important;
    }
    
    .chat-section {
        height: 100vh !important;
        min-height: 100vh !important;
    }
    
    .chat-messages {
        flex: 1 !important;
        min-height: 0 !important;
    }
}

/* ==== Layout Fix: Make chat fill available height in split/minimized windows ==== */
/* Universal row-span to eliminate unused grid rows */
.chat-section {
  grid-row: 1 / -1 !important; /* span entire grid rows regardless of viewport */
}


html, body {
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
}

.nav-instance {
  flex-shrink: 0;
}

.main-layout {
  flex: 1 1 auto !important;
  height: auto !important;
}

.chat-section {
  flex: 1 1 auto !important;
  height: auto !important;
  min-height: 0 !important;
}
.avatar-interrupt-button {
    background: var(--primary-gradient) !important;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    white-space: nowrap;
    margin-left: 10px;
}

.avatar-interrupt-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.avatar-interrupt-button i {
    font-size: 0.875rem;
}

.avatar-interrupt-button:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* Remove line below conversation header */
.conversation-header {
    border-bottom: none !important;
}

.conversation-header::before {
    display: none !important;
}

/* Streaming transcript indicator */
.streaming {
    animation: streaming 1s ease-in-out infinite;
    transition: all 0.3s ease;
}

/* Ensure textarea updates are smooth during streaming */
#messageInput.streaming {
    border-color: #007bff !important;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.5) !important;
}

/* Right panel collapsed state styles */
.main-layout.right-collapsed .suggestions-panel {
    width: 60px;
}

.main-layout.right-collapsed .suggestions-panel .panel-content {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    padding: 4rem 0.5rem 1rem !important;
    gap: 0.75rem !important;
    height: 100% !important;
    width: 100% !important;
    overflow: hidden !important;
}

.main-layout.right-collapsed .suggestions-panel .suggestions-toggle {
    position: absolute;
    top: 1rem;
    right: 50%;
    transform: translateX(50%);
    z-index: 10;
}

/* Hide text content and show only icons in collapsed mode */
.main-layout.right-collapsed .panel-header-content {
    display: none !important;
    visibility: hidden !important;
}

.main-layout.right-collapsed .panel-section {
    display: none !important;
    visibility: hidden !important;
}

.main-layout.right-collapsed .minimized-actions {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    gap: 0.5rem !important;
    padding: 3rem 0.5rem 1rem !important;
    height: 100% !important;
    justify-content: flex-start !important;
    overflow-y: auto !important;
    max-height: calc(100vh - 200px) !important;
}

.main-layout.right-collapsed .minimized-action-btn {
    width: 36px !important;
    height: 36px !important;
    background: var(--primary-gradient) !important;
    border: none !important;
    border-radius: 50% !important;
    color: white !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    transition: var(--transition-fast) !important;
    box-shadow: var(--shadow-sm) !important;
}

.main-layout.right-collapsed .minimized-action-btn:hover {
    background: var(--secondary-color) !important;
    box-shadow: var(--shadow-md) !important;
}

/* Suggestions toggle button styles */
.suggestions-toggle {
    background: var(--primary-color);
    color: white;
    border: 1px solid var(--primary-color);
    border-radius: var(--border-radius-md);
    padding: 0.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.suggestions-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.main-layout.right-collapsed .suggestions-toggle:hover {
    background: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.suggestions-toggle i {
    font-size: 1rem;
    transition: var(--transition-fast);
}

/* Panel header content wrapper */
.panel-header-content {
    flex: 1;
}

/* Updated panel header layout for toggle button positioning */
.suggestions-panel .panel-header {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
    padding: 1.5rem 1.5rem 1rem;
    min-height: 80px;
    border-bottom: none;
}

/* Toggle button positioning in uncollapsed state */
.suggestions-panel .suggestions-toggle {
    position: relative;
    top: 0;
    right: 0;
    z-index: 10;
    width: 32px;
    height: 32px;
    padding: 0.25rem;
    font-size: 1rem;
    margin-left: auto;
}

/* Updated collapsed state toggle button positioning */
.main-layout.right-collapsed .suggestions-panel .suggestions-toggle {
    position: absolute;
    top: 0.5rem;
    right: 1rem;
    transform: none;
    z-index: 10;
    width: 40px;
    height: 40px;
    padding: 0.5rem;
    font-size: 1rem;
    margin: 0;
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

.main-layout.right-collapsed .suggestions-panel .suggestions-toggle:focus,
.main-layout.right-collapsed .suggestions-panel .suggestions-toggle:active {
    border: none !important;
    outline: none !important;
    box-shadow: none !important;
}

/* Updated minimized actions with consistent styling */
.main-layout.right-collapsed .minimized-action-btn {
    width: 36px !important;
    height: 36px !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border: none !important;
    border-radius: 50% !important;
    color: white !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    transition: var(--transition-fast) !important;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1) !important;
    flex-shrink: 0 !important;
    margin-right: 0.5rem !important;
}

.main-layout.right-collapsed .minimized-action-btn:hover {
    background: var(--secondary-color) !important;
    box-shadow: var(--shadow-md) !important;
}

/* Categorized Source Type Headers */
.type-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 1rem 0 0.5rem 0;
    font-size: 0.85rem;
    font-weight: 600;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid;
}

.type-header:first-child {
    margin-top: 0;
}

.type-header i {
    font-size: 0.9rem;
}

/* Source Location Tags (Internal/External) */
.source-location-tag {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    white-space: nowrap;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.source-location-tag.internal {
    color: #4ECDC4;
    background: rgba(78, 205, 196, 0.1);
    border: 1px solid #4ECDC4;
}

.source-location-tag.internal i {
    font-size: 0.6rem;
    margin-right: 0.25rem;
}

.source-location-tag.external {
    color: #6B9DFF;
    background: rgba(107, 157, 232, 0.1);
    border: 1px solid #6B9DFF;
}

.source-location-tag.external i {
    font-size: 0.6rem;
    margin-right: 0.25rem;
}

/* ============================================================
   INPUT ACTIONS MENU - Plus Button with Video Generation
   ============================================================ */

/* Update input wrapper to add left padding for the plus button */
.input-wrapper {
    padding-left: 2.5rem;
}

/* Plus Button Menu Container */
.input-actions-menu {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    z-index: 20;
}

/* Plus Button Style */
.input-plus-btn {
    background: transparent;
    border: none;
    color: var(--primary-color);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    padding: 0;
    flex-shrink: 0;
    position: relative;
}

.input-plus-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: rotate(90deg) scale(1.15);
}

.input-plus-btn:active {
    transform: rotate(90deg) scale(0.95);
}

/* Dropdown Menu for Actions */
.input-actions-dropdown {
    position: absolute;
    bottom: calc(100% + 0.75rem);
    left: -0.5rem;
    background: var(--surface-color);
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius-md);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.2);
    min-width: 200px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px) scale(0.95);
    transition: var(--transition-fast);
    pointer-events: none;
}

.input-actions-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* Individual Action Options */
.action-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.875rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.action-option::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background: var(--primary-gradient);
    z-index: -1;
    transition: var(--transition-fast);
}

.action-option:hover {
    color: white;
    padding-left: 1.25rem;
}

.action-option:hover::before {
    width: 100%;
}

.action-option i {
    font-size: 1.1rem;
    width: 1.25rem;
    text-align: center;
    flex-shrink: 0;
}

.action-option span {
    flex: 1;
    white-space: nowrap;
}

/* Plus Button Fix - Override all previous styles */
textarea.message-input,
#message.message-input,
textarea#message {
    padding-left: 4.5rem !important;
}


/* ========================================
   AVATAR MODE SELECTION MODAL
   ======================================== */

/* Avatar Mode Modal Container */
.avatar-mode-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.avatar-mode-modal.active {
    opacity: 1;
}

/* Modal Overlay */
.avatar-mode-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
}

/* Modal Content */
.avatar-mode-content {
    position: relative;
    background: linear-gradient(135deg, #1a1f36 0%, #2d3561 100%);
    border-radius: 24px;
    max-width: 900px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(102, 126, 234, 0.3);
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s ease;
}

.avatar-mode-modal.active .avatar-mode-content {
    transform: scale(1) translateY(0);
}

/* Modal Header */
.avatar-mode-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 2rem 2.5rem;
    border-bottom: 2px solid rgba(102, 126, 234, 0.2);
    position: relative;
}

.avatar-mode-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: white;
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.3);
}

.avatar-mode-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: white;
    margin: 0;
    flex: 1;
}

.avatar-mode-close {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.avatar-mode-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

/* Modal Body */
.avatar-mode-body {
    padding: 2.5rem;
}

.avatar-mode-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin: 0 0 2rem 0;
    text-align: center;
}

/* Avatar Mode Options Container */
.avatar-mode-options {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Avatar Option Card */
.avatar-option-card {
    display: flex;
    align-items: stretch;
    gap: 1.5rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.avatar-option-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.avatar-option-card:hover {
    border-color: #667eea;
    transform: translateX(8px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.avatar-option-card:hover::before {
    opacity: 1;
}

.avatar-option-icon {
    width: 64px;
    height: 64px;
    min-width: 64px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: white;
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.3);
    transition: transform 0.3s ease;
}

.avatar-option-card:hover .avatar-option-icon {
    transform: scale(1.1) rotate(-5deg);
}

.avatar-option-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.avatar-option-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: white;
    margin: 0;
}

.avatar-option-description {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin: 0;
}

.avatar-option-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.avatar-feature-tag {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.15);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 12px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.9);
    white-space: nowrap;
}

.avatar-feature-tag i {
    font-size: 1rem;
    color: #667eea;
}

.avatar-option-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #667eea;
    opacity: 0;
    transition: all 0.3s ease;
}

.avatar-option-card:hover .avatar-option-arrow {
    opacity: 1;
    transform: translateX(8px);
}

/* Modal Footer */
.avatar-mode-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    padding: 1.5rem 2.5rem;
    border-top: 2px solid rgba(102, 126, 234, 0.2);
}

.avatar-mode-btn {
    padding: 0.875rem 1.75rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar-mode-btn-cancel {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.avatar-mode-btn-cancel:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .avatar-mode-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .avatar-mode-header {
        padding: 1.5rem;
    }
    
    .avatar-mode-body {
        padding: 1.5rem;
    }
    
    .avatar-mode-title {
        font-size: 1.35rem;
    }
    
    .avatar-option-card {
        flex-direction: column;
        padding: 1.5rem;
    }
    
    .avatar-option-icon {
        width: 56px;
        height: 56px;
        min-width: 56px;
        font-size: 1.5rem;
    }
    
    .avatar-option-title {
        font-size: 1.15rem;
    }
    
    .avatar-option-features {
        flex-direction: column;
    }
    
    .avatar-feature-tag {
        width: 100%;
    }
    
    .avatar-option-arrow {
        display: none;
    }
    
    .avatar-mode-footer {
        padding: 1.25rem 1.5rem;
    }
}

/* ========================================
   Avatar Mode Selection Styles
   ======================================== */
.avatar-mode-selection-container {
    padding: 3rem 2rem;
    background: #ffffff;
    text-align: center;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

.avatar-mode-selection-container h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 0.5rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.avatar-mode-selection-container > p {
    font-size: 1.1rem;
    color: #718096;
    margin: 0 0 3rem 0;
}

.mode-options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.mode-option-card {
    background: #ffffff;
    border: 3px solid #f1f5f9;
    border-radius: 1.5rem;
    padding: 2.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.mode-option-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 0.5s ease;
}

.mode-option-card:hover::before {
    left: 100%;
}

.mode-option-card:hover {
    border-color: #667eea;
    transform: translateY(-8px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
}

.mode-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
}

.mode-option-card:hover .mode-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
}

.mode-icon i {
    font-size: 2.5rem;
    color: white;
}

.mode-option-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 1rem 0;
}

.mode-description {
    font-size: 1rem;
    color: #4a5568;
    line-height: 1.6;
    margin: 0 0 1.5rem 0;
    text-align: center;
}

.mode-features {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 0 0 2rem 0;
    width: 100%;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    color: #4a5568;
    text-align: left;
}

.feature-item i {
    color: #4facfe;
    font-size: 1rem;
    flex-shrink: 0;
}

.mode-select-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 0.75rem;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
}

.mode-select-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
}

.mode-select-btn i {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.mode-option-card:hover .mode-select-btn i {
    transform: translateX(4px);
}

.back-to-mode-btn {
    background: #ffffff;
    border: 2px solid #e2e8f0;
    border-radius: 0.75rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: #1a202c;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
}

.back-to-mode-btn:hover {
    background: #f1f5f9;
    border-color: #667eea;
    transform: translateX(-4px);
}

.back-to-mode-btn i {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.back-to-mode-btn:hover i {
    transform: translateX(-4px);
}

@media (max-width: 968px) {
    .mode-options-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .avatar-mode-selection-container {
        padding: 2rem 1rem;
    }
    
    .mode-option-card {
        padding: 2rem 1.5rem;
    }
}

/* Video Generation - Conversation Selection Styles */
.conversation-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: #667eea;
}

.conversation-checkbox label {
    cursor: pointer;
}

.conversation-user,
.conversation-bot {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.conversation-user {
    background: linear-gradient(135deg, #f0f4ff 0%, #e5edff 100%);
    border-left: 3px solid #667eea;
}

.conversation-bot {
    background: linear-gradient(135deg, #f8fafb 0%, #e9ecef 100%);
    border-left: 3px solid #10b981;
}

.conversation-user i,
.conversation-bot i {
    margin-top: 2px;
    font-size: 1rem;
}

.conversation-user i {
    color: #667eea;
}

.conversation-bot i {
    color: #10b981;
}

.conversation-user span,
.conversation-bot span {
    flex: 1;
    color: #2d3748;
}

.conversation-item {
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.conversation-item:hover {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.no-conversations {
    text-align: center;
    padding: 3rem 2rem;
    color: #718096;
}

.no-conversations i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #cbd5e0;
}

.no-conversations p {
    font-size: 1.1rem;
    margin: 0;
}

.selection-counter {
    font-size: 1.1rem;
    font-weight: 600;
    color: #667eea;
    background: linear-gradient(135deg, #f0f4ff 0%, #e5edff 100%);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    display: inline-block;
}

.video-selection-body {
    max-height: 500px;
    overflow-y: auto;
}

.conversation-list {
    max-height: 400px;
    overflow-y: auto;
    padding: 0.5rem;
}

.loading-conversations {
    text-align: center;
    padding: 2rem;
    color: #718096;
}

.loading-conversations i {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.selection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 10000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast i {
    font-size: 1.25rem;
}

.toast.info {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.toast.success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.toast.error {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

/* Enhanced Conversation Selection - Separate Message Blocks */
.conversation-pair-card {
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
    transition: all 0.2s ease;
}

.conversation-pair-card:hover {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
}

.conversation-pair-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #f1f5f9;
}

.conversation-pair-number {
    flex: 1;
    font-weight: 600;
    color: #667eea;
    font-size: 0.95rem;
}

.conversation-pair-messages {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.conversation-message-block {
    border-radius: 8px;
    padding: 1rem;
    border-left: 4px solid;
}

.conversation-message-block.user-block {
    background: linear-gradient(135deg, #f0f4ff 0%, #e5edff 100%);
    border-left-color: #667eea;
}

.conversation-message-block.bot-block {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border-left-color: #10b981;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 0.875rem;
}

.conversation-message-block.user-block .message-header {
    color: #667eea;
}

.conversation-message-block.bot-block .message-header {
    color: #10b981;
}

.message-header i {
    font-size: 1.125rem;
}

.message-label {
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.75rem;
}

.message-text {
    color: #2d3748;
    line-height: 1.6;
    font-size: 0.95rem;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.conversation-divider {
    display: flex;
    justify-content: center;
    align-items: center;
    color: #cbd5e0;
    font-size: 0.875rem;
}

.conversation-divider i {
    padding: 0.25rem;
    background: #f7fafc;
    border-radius: 50%;
}

/* Update checkbox styles for new layout */
.conversation-pair-card .conversation-checkbox input[type="checkbox"] {
    width: 22px;
    height: 22px;
    cursor: pointer;
    accent-color: #667eea;
}

.conversation-pair-card .conversation-checkbox label {
    cursor: pointer;
}

/* Selected state */
.conversation-pair-card.selected {
    border-color: #667eea;
    background: linear-gradient(135deg, #f0f4ff 0%, #ffffff 100%);
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.2);
}

/* Override old conversation-item styles for new structure */
.conversation-item {
    border: none !important;
}


/* ========================================
   VIDEO GENERATION - CONVERSATION SELECTION
   ======================================== */

.conversation-selection-container {
    max-height: 500px;
    overflow-y: auto;
    padding: 0.5rem;
}

.conversation-item {
    margin-bottom: 0.75rem;
    border-radius: var(--border-radius-md);
    transition: var(--transition-fast);
}

.conversation-item:last-child {
    margin-bottom: 0;
}

.conversation-checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
    background: white;
}

.conversation-checkbox-wrapper:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.message-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary-color);
    margin-top: 2px;
}

.conversation-item-content {
    flex: 1;
}

.conversation-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.message-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.human-message-item .message-author {
    color: #667eea;
}

.bot-message-item .message-author {
    color: #10b981;
}

.message-number {
    font-size: 0.875rem;
    color: var(--text-muted);
    background: var(--border-light);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
}

.conversation-item-text {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 0.9375rem;
}

.checkbox-indicator {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    margin-top: 2px;
}

.message-checkbox:checked ~ .conversation-item-content ~ .checkbox-indicator {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.checkbox-indicator i {
    opacity: 0;
    transition: var(--transition-fast);
}

.message-checkbox:checked ~ .conversation-item-content ~ .checkbox-indicator i {
    opacity: 1;
}

.message-checkbox:checked ~ .conversation-item-content {
    opacity: 1;
}

.conversation-checkbox-wrapper:has(.message-checkbox:checked) {
    border-color: var(--primary-color);
    background: linear-gradient(to right, rgba(102, 126, 234, 0.05), transparent);
}

.selection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0.5rem 0;
}

.selection-counter {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
}

.selection-counter #selectedCount {
    font-size: 1.25rem;
    font-weight: 700;
}

.video-selection-body {
    min-height: 400px;
}

.loading-conversations {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 3rem;
    color: var(--text-muted);
}

.loading-conversations i {
    font-size: 2rem;
    color: var(--primary-color);
}

.error-message {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.05), rgba(220, 38, 38, 0.05));
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--border-radius-md);
    color: #dc2626;
    font-weight: 500;
}

.error-message i {
    font-size: 1.5rem;
}

/* Video Modal Enhanced Styles */
.video-modal-btn.enabled {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(102, 126, 234, 0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .conversation-checkbox-wrapper {
        padding: 0.75rem;
    }
    
    .conversation-item-text {
        font-size: 0.875rem;
    }
    
    .selection-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .selection-counter {
        width: 100%;
        text-align: center;
    }
}