/* Modern Dark Theme - ChatGPT Inspired */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #1e1e1e;
    --bg-hover: #252525;
    --bg-input: #2a2a2a;
    
    --text-primary: #ffffff;
    --text-secondary: #b4b4b4;
    --text-tertiary: #8b8b8b;
    
    --accent-primary: #8B5CF6;
    --accent-secondary: #EC4899;
    --accent-gradient: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    
    --border-color: #2a2a2a;
    --border-hover: #3a3a3a;
    
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.eye-tracking-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.eye-tracking-toggle:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.eye-tracking-toggle.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
}

.eye-tracking-toggle.active svg {
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

/* Section Title */
.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.3px;
}

/* Flashcards Grid */
.flashcards-section {
    animation: fadeInUp 0.6s ease-out;
}

.flashcards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.flashcard {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition);
    cursor: default;
    position: relative;
    overflow: hidden;
}

.flashcard::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.flashcard:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
}

.flashcard:hover::before {
    transform: scaleX(1);
}

.flashcard-interactive {
    cursor: pointer;
}

.card-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.3px;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-lg);
}

.card-stat {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-button {
    margin-top: var(--spacing-lg);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.card-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(139, 92, 246, 0.3);
}

/* Chat Section */
.chat-section {
    display: none; /* Hide the old chat section */
}

/* BrahmaGupta AI Tutor Section */
.brahmagupta-section {
    width: 100%;
    animation: fadeInUp 0.8s ease-out;
}

.brahmagupta-container {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: var(--transition);
}

.brahmagupta-container:hover {
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: 0 8px 32px rgba(139, 92, 246, 0.2);
    transform: translateY(-2px);
}

.brahmagupta-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.brahmagupta-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 2px solid rgba(139, 92, 246, 0.4);
}

.brahmagupta-title {
    flex: 1;
}

.brahmagupta-title h2 {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.brahmagupta-title p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.brahmagupta-open-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.brahmagupta-open-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(139, 92, 246, 0.4);
}

.brahmagupta-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(139, 92, 246, 0.2);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(139, 92, 246, 0.05);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.feature-item:hover {
    background: rgba(139, 92, 246, 0.1);
    transform: translateX(4px);
}

.feature-item svg {
    color: var(--accent-primary);
    flex-shrink: 0;
}

.feature-item span {
    color: var(--text-primary);
    font-weight: 500;
}

/* Community Quiz Section - Cyan/Blue Theme with Black Background */
.community-quiz-section {
    background: transparent;
}

.community-quiz-section .brahmagupta-container {
    background: var(--bg-card);
    border: 1px solid rgba(6, 182, 212, 0.3);
}

.community-quiz-section .brahmagupta-container:hover {
    border-color: rgba(6, 182, 212, 0.6);
    box-shadow: 0 20px 60px rgba(6, 182, 212, 0.15);
}

.community-quiz-section .feature-item:hover {
    background: rgba(6, 182, 212, 0.1);
}

.community-quiz-section .feature-item svg {
    color: #06b6d4;
}

.community-quiz-btn {
    background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%) !important;
}

.community-quiz-btn:hover {
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.4) !important;
}

@media (max-width: 768px) {
    .brahmagupta-features {
        grid-template-columns: 1fr;
    }
    
    .brahmagupta-header {
        flex-wrap: wrap;
    }
    
    .brahmagupta-open-btn {
        width: 100%;
        justify-content: center;
    }
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-xl);
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
.messages-container::-webkit-scrollbar {
    width: 8px;
}

.messages-container::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.messages-container::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 4px;
}

.messages-container::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* Welcome Message */
.welcome-message {
    text-align: center;
    max-width: 600px;
    margin: 4rem auto;
    animation: fadeIn 1s ease-out;
}

.welcome-icon {
    margin-bottom: var(--spacing-lg);
}

.welcome-message h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
}

.welcome-message p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 1.125rem;
}

.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.suggestion-chip {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.suggestion-chip:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

/* Message Bubbles */
.message {
    margin-bottom: var(--spacing-lg);
    animation: slideIn 0.3s ease-out;
}

.message-user {
    text-align: right;
}

.message-bubble {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    max-width: 80%;
}

.message-user .message-bubble {
    background: var(--accent-gradient);
    color: white;
}

.message-ai .message-bubble {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

/* Input Container */
.input-container {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-sm);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm);
    transition: var(--transition);
}

.input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.chat-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 1rem;
    resize: none;
    max-height: 150px;
    padding: var(--spacing-sm);
    font-family: inherit;
}

.chat-input::placeholder {
    color: var(--text-tertiary);
}

.send-button {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.send-button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
}

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

.input-hint {
    margin-top: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-align: center;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-out;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.4s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.close-modal {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-modal:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-xl);
    overflow-y: auto;
    flex: 1;
}

/* Quiz Content */
.quiz-question {
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.question-number {
    font-size: 0.875rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.question-text {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.option-button {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.option-button:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.option-button.selected {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
}

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

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

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        padding: var(--spacing-md);
    }
    
    .flashcards-grid {
        grid-template-columns: 1fr;
    }
    
    .header {
        padding: var(--spacing-md);
    }
    
    .logo h1 {
        font-size: 1.25rem;
    }
    
    .welcome-message h2 {
        font-size: 1.5rem;
    }
    
    .modal-content {
        width: 95%;
        max-height: 95vh;
    }
}

/* RAG Upload Section */
.rag-upload-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-tertiary);
}

.file-upload-area:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
}

.file-upload-area svg {
    margin: 0 auto var(--spacing-md);
    color: var(--accent-primary);
}

.file-upload-area h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.file-upload-area p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.file-types {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.file-info {
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.file-details {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.file-details svg {
    color: var(--accent-primary);
    flex-shrink: 0;
}

.file-text {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
}

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

.remove-file {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.remove-file:hover {
    background: var(--bg-hover);
    color: var(--error);
}

.generation-options {
    margin-bottom: var(--spacing-lg);
}

.generation-options label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.generation-options input[type="range"] {
    width: calc(100% - 50px);
    margin-right: var(--spacing-md);
    accent-color: var(--accent-primary);
}

.generation-options span {
    font-weight: 600;
    color: var(--accent-primary);
}

.generate-btn,
.start-rag-quiz-btn,
.save-questions-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    justify-content: center;
}

.generate-btn:hover,
.start-rag-quiz-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

.save-questions-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    margin-top: var(--spacing-md);
}

.save-questions-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

.processing-status {
    text-align: center;
    padding: var(--spacing-2xl);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.processing-status p {
    color: var(--text-secondary);
}

.generated-questions {
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.generated-questions h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

#questions-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: var(--spacing-lg);
    padding-right: var(--spacing-sm);
}

.question-preview {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.question-preview h4 {
    color: var(--accent-primary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.question-preview p {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.question-preview .options {
    display: grid;
    gap: var(--spacing-xs);
}

.question-preview .option {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.question-preview .option.correct {
    color: var(--success);
    font-weight: 500;
}

.modal-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Eye Tracking Styles */
.eye-tracking-overlay {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1000;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    transition: var(--transition);
}

.eye-tracking-overlay.hidden {
    display: none;
}

.eye-tracking-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-width: 320px;
}

.camera-feed {
    position: relative;
    width: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-tertiary);
}

#eye-tracking-video {
    width: 100%;
    height: auto;
    display: block;
    transform: scaleX(-1); /* Mirror the video */
}

#eye-tracking-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: scaleX(-1); /* Mirror the canvas */
}

.tracking-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.stat-item {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.stat-item .stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-xs);
}

.stat-item .stat-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-item .stat-value.success {
    color: var(--success);
}

.stat-item .stat-value.warning {
    color: var(--warning);
}

.stat-item .stat-value.error {
    color: var(--error);
}

.focus-indicator {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.focus-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.focus-bar-fill {
    height: 100%;
    background: var(--accent-gradient);
    transition: width 0.3s ease, background 0.3s ease;
    border-radius: 4px;
}

.focus-bar-fill.success {
    background: linear-gradient(90deg, var(--success), #22c55e);
}

.focus-bar-fill.warning {
    background: linear-gradient(90deg, var(--warning), #fbbf24);
}

.focus-bar-fill.error {
    background: linear-gradient(90deg, var(--error), #f87171);
}

.focus-message {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
}

.focus-message.success {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.focus-message.warning {
    color: var(--warning);
    background: rgba(245, 158, 11, 0.1);
}

.focus-message.error {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

.eye-tracking-toggle.active {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
}

.eye-tracking-toggle.active:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

/* Minimal Tracking Indicator */
.tracking-active-indicator {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    color: white;
    font-size: 0.75rem;
    font-weight: 500;
    z-index: 999;
    pointer-events: none;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

/* Responsive Eye Tracking */
@media (max-width: 768px) {
    .eye-tracking-overlay {
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
        left: var(--spacing-sm);
    }
    
    .eye-tracking-container {
        min-width: auto;
    }
    
    .tracking-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* API Key Modal & Button */
.api-key-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.api-key-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.api-key-btn.configured {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.api-key-btn.configured:hover {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.2);
}

/* Analytics Button */
.analytics-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.1));
    border: 1px solid rgba(168, 85, 247, 0.3);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.analytics-btn:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(168, 85, 247, 0.2));
    border-color: var(--accent-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(168, 85, 247, 0.2);
}

.api-key-modal-content {
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.api-key-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.info-box {
    background: var(--bg-tertiary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-primary);
}

.info-box h3, .info-box h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
    font-size: 1rem;
}

.info-box ol {
    margin-left: var(--spacing-lg);
    line-height: 1.8;
}

.info-box a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
}

.info-box a:hover {
    text-decoration: underline;
}

.info-box-warning {
    border-left-color: var(--warning);
    background: rgba(245, 158, 11, 0.05);
}

.info-box-warning h4 {
    color: var(--warning);
}

.api-key-input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    position: relative;
}

.api-key-input-group label {
    font-weight: 600;
    color: var(--text-primary);
}

.api-key-input {
    padding: var(--spacing-md);
    padding-right: 50px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    transition: var(--transition);
}

.api-key-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.toggle-visibility-btn {
    position: absolute;
    right: 10px;
    bottom: 10px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 5px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.toggle-visibility-btn:hover {
    color: var(--accent-primary);
    background: var(--bg-hover);
}

.api-key-actions {
    display: flex;
    gap: var(--spacing-md);
}

.btn-primary, .btn-secondary {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(139, 92, 246, 0.3);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.api-key-status-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 500;
    display: none;
}

.api-key-status-message.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
    display: block;
}

.api-key-status-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
    display: block;
}

.api-key-status-message.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid var(--warning);
    display: block;
}

/* ===== VOICE AGENT STYLES ===== */

.modal-header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.voice-agent-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.voice-agent-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

.voice-agent-btn.connecting {
    border-color: var(--warning);
    color: var(--warning);
    animation: pulse-warning 1.5s ease-in-out infinite;
}

.voice-agent-btn.connected {
    border-color: var(--success);
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.voice-agent-btn.connected .listening-indicator {
    display: block;
    animation: pulse-listening 2s ease-in-out infinite;
}

.voice-agent-btn.error {
    border-color: var(--error);
    color: var(--error);
}

/* Camera Toggle Button */
.camera-toggle-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.625rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    font-size: 0.875rem;
    position: relative;
}

.camera-toggle-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.camera-toggle-btn.camera-off {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
}

.camera-toggle-btn.camera-off:hover {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.5);
}

.camera-toggle-btn.camera-off .camera-on-icon {
    display: none;
}

.camera-toggle-btn.camera-off .camera-off-icon {
    display: block !important;
    stroke: var(--error);
}

.camera-toggle-btn.camera-off #camera-status {
    color: var(--error);
}

.voice-agent-btn .microphone-icon {
    transition: all 0.3s ease;
}

.voice-agent-btn:hover .microphone-icon {
    transform: scale(1.1);
}

.voice-agent-btn.connected .microphone-icon {
    stroke: var(--success);
}

.listening-indicator {
    display: none;
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    position: absolute;
    top: 8px;
    right: 8px;
}

@keyframes pulse-warning {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(0.98);
    }
}

@keyframes pulse-listening {
    0%, 100% {
        opacity: 1;
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    50% {
        opacity: 0.8;
        box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
    }
}

/* Voice Agent Status Text */
#voice-agent-status {
    font-weight: 500;
}

.voice-agent-btn.connecting #voice-agent-status::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: ''; }
    40% { content: '.'; }
    60% { content: '..'; }
    80%, 100% { content: '...'; }
}

/* Agent Context Panel */
.agent-context-panel {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 350px;
    max-height: 500px;
    z-index: 9999;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    border: 2px solid var(--accent-primary);
    overflow: hidden;
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.context-panel-header {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.context-panel-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

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

.context-panel-body {
    padding: var(--spacing-md);
    max-height: 450px;
    overflow-y: auto;
}

.context-section {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.context-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.context-section strong {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
    font-size: 0.875rem;
}

.context-section p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
    margin: 0;
}

.context-section ul {
    margin: var(--spacing-sm) 0 0 0;
    padding-left: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.context-section li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

/* Responsive Eye Tracking (moved below API Key styles) */
@media (max-width: 768px) {
    .eye-tracking-overlay {
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
        left: var(--spacing-sm);
    }
    
    .eye-tracking-container {
        min-width: auto;
    }
    
    .tracking-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Community Quiz Dashboard Styles */
.community-dashboard {
    padding: 1rem;
}

.dataset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.dataset-card {
    background: linear-gradient(135deg, rgba(20, 20, 30, 0.7) 0%, rgba(30, 30, 40, 0.7) 100%);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.dataset-card:hover {
    border-color: rgba(6, 182, 212, 0.6);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(6, 182, 212, 0.2);
}

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

.dataset-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.dataset-info h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.dataset-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.dataset-stats {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.stat-badge {
    background: rgba(6, 182, 212, 0.15);
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    border: 1px solid rgba(6, 182, 212, 0.25);
    transition: all 0.2s ease;
}

.dataset-card:hover .stat-badge {
    background: rgba(6, 182, 212, 0.25);
    border-color: rgba(6, 182, 212, 0.4);
}

.import-dataset-btn {
    background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: auto;
}

.import-dataset-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(6, 182, 212, 0.5);
}

.import-dataset-btn:active {
    transform: translateY(0);
}

.import-dataset-btn svg {
    transition: var(--transition);
}

.import-dataset-btn:hover svg {
    transform: translateY(2px);
}

@media (max-width: 768px) {
    .dataset-grid {
        grid-template-columns: 1fr;
    }
}