/* Root Variables */
:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #eef2ff;
    --secondary-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --hover-bg: #f1f5f9;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #312e81;
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --text-color: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --hover-bg: #334155;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: var(--transition);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.page {
    display: none;
    min-height: 100vh;
}

.page.active {
    display: block;
}

.navbar {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Hide mobile menu elements on desktop */
.mobile-menu-toggle,
.mobile-menu-overlay {
    display: none;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    cursor: pointer;
}

.nav-brand i {
    font-size: 1.8rem;
}

.nav-links, .nav-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: var(--bg-color);
}

.hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.hero-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-illustration {
    text-align: center;
    margin-top: 3rem;
}

.hero-illustration i {
    font-size: 8rem;
    opacity: 0.2;
}

.features {
    padding: 4rem 0;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
}

.feature-card p.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    min-height: 40px; /* Ensure consistent button height */
    box-sizing: border-box;
    position: relative;
    overflow: hidden;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 40px;
    box-sizing: border-box;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-primary:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #0891b2;
    transform: translateY(-2px);
}

.btn-secondary:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

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

.btn-text {
    background: none;
    color: var(--text-color);
}

.btn-text:hover {
    background-color: var(--bg-color);
}

.btn-text:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Disabled button states */
.btn:disabled,
.btn[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    pointer-events: none;
}

/* Button loading state */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

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

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-success {
    background-color: #10b981;
    color: white;
}

.btn-success:hover {
    background-color: #059669;
    transform: translateY(-2px);
}

.btn-info {
    background-color: #3b82f6;
    color: white;
}

.btn-info:hover {
    background-color: #2563eb;
    transform: translateY(-2px);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.login-container {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

.login-card {
    background-color: var(--surface-color);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    max-width: 450px;
    width: 100%;
}

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

.login-header i {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.login-header h2 {
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-secondary);
}

.login-help {
    margin-top: 1rem;
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: var(--radius);
    text-align: center;
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    margin-bottom: 0.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    background-color: var(--surface-color);
    color: var(--text-color);
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.format-guide {
    margin-top: 1rem;
    padding: 1rem;
    background-color: var(--bg-color);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius);
}

.format-guide strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.5rem;
}

.format-guide ul {
    margin: 0;
    padding-left: 1.5rem;
}

.format-guide li {
    margin-bottom: 0.5rem;
    color: var(--text-color);
    line-height: 1.6;
}

.format-guide li strong {
    display: inline;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
    background-color: var(--surface-color);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
}

.error-message {
    white-space: pre-line;
    line-height: 1.6;
    text-align: left;
    max-width: 100%;
    word-wrap: break-word;
    margin: 1rem 0;
    padding: 1.5rem;
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    color: #991b1b;
    border-radius: 12px;
    border-left: 5px solid #dc2626;
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.15);
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, sans-serif;
    font-size: 0.95rem;
    display: none;
    animation: slideIn 0.3s ease-out;
}

.error-message.show {
    display: block;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile responsive error messages */


.success-message {
    margin-top: 1rem;
    padding: 0.75rem;
    background-color: #d4edda;
    color: #155724;
    border-radius: var(--radius);
    border: 1px solid #c3e6cb;
}

.login-footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.login-footer p {
    margin: 0;
    color: var(--text-color);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.login-footer p:first-child {
    margin-top: 0;
}

.login-footer p:last-child {
    margin-bottom: 0;
}

.login-footer a {
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--surface-color);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.login-footer a:hover {
    background: var(--primary-color);
    color: white !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(79, 70, 229, 0.3);
    border-color: var(--primary-color);
}

.login-footer a:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Enhanced hover effect for better UX */
.login-footer a {
    position: relative;
    overflow: hidden;
}

.login-footer a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.login-footer a:hover::before {
    left: 100%;
}

.lesson-container {
    padding: 2rem 0;
    min-height: calc(100vh - 80px);
}

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

.lesson-progress {
    margin-top: 1rem;
    color: var(--text-secondary);
}

/* ============================================
   ENHANCED VIDEO & MATERIALS SECTION
   ============================================ */

/* Section Title Styling */
.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--primary-color);
}

.section-title i {
    font-size: 1.75rem;
    color: var(--primary-color);
}

.section-title h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0;
}

.section-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* Video Section */
.video-section {
    background: linear-gradient(135deg, var(--surface-color) 0%, rgba(var(--primary-rgb), 0.05) 100%);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 2.5rem;
    border: 1px solid var(--border-color);
}

.video-card {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.video-wrapper {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.video-wrapper video {
    width: 100%;
    border-radius: var(--radius);
}

#youtube-player-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    max-width: 100%; /* Full width on all devices */
}

#youtube-player {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: var(--radius);
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: white;
    border-radius: var(--radius);
}

.video-overlay i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* OLD fullscreen button (inside video) - DEPRECATED */
.fullscreen-btn {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* NEW fullscreen button (outside video player) */
.fullscreen-btn-external {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 1rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.fullscreen-btn-external:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

.fullscreen-btn-external:active {
    transform: translateY(0);
}

.fullscreen-btn-external i {
    font-size: 1.2rem;
}

/* Mobile Auto-Rotate Notice */
.mobile-rotate-notice {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    animation: slideIn 0.5s ease-out;
}

.mobile-rotate-notice i {
    font-size: 1.5rem;
    flex-shrink: 0;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Video Info Card */
.video-info-card {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 1.25rem;
    border-radius: 8px;
    margin-top: 1rem;
    border: 1px solid var(--border-color);
}

.info-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background-color: rgba(79, 70, 229, 0.1);
    border-radius: 6px;
}

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

.info-content p {
    margin: 0;
    color: var(--text-color);
    font-weight: 500;
}

.video-time-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    font-weight: 600;
    color: var(--text-color);
}

.video-time-display i {
    color: var(--primary-color);
}

/* Materials Section */
.materials-section {
    background: linear-gradient(135deg, var(--surface-color) 0%, rgba(34, 197, 94, 0.05) 100%);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 2.5rem;
    border: 1px solid var(--border-color);
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.video-wrapper:fullscreen .fullscreen-btn i::before,
.video-wrapper:fullscreen .fullscreen-btn-external i::before {
    content: "\f066"; /* fa-compress icon */
}

.video-wrapper:-webkit-full-screen .fullscreen-btn i::before,
.video-wrapper:-webkit-full-screen .fullscreen-btn-external i::before {
    content: "\f066";
}

.video-wrapper:-moz-full-screen .fullscreen-btn i::before,
.video-wrapper:-moz-full-screen .fullscreen-btn-external i::before {
    content: "\f066";
}

.video-wrapper:-ms-fullscreen .fullscreen-btn i::before,
.video-wrapper:-ms-fullscreen .fullscreen-btn-external i::before {
    content: "\f066";
}

.video-info {
    margin-top: 1rem;
    text-align: center;
}

/* Video Complete Section */
.video-complete-section {
    max-width: 600px;
    margin: 2rem auto;
}

.completion-card {
    background-color: var(--surface-color);
    padding: 3rem 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.completion-icon {
    font-size: 4rem;
    color: var(--success-color);
    margin-bottom: 1.5rem;
}

.completion-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.completion-card p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.completion-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    min-width: 200px;
}

/* Assessment Instructions */
.instructions-content {
    margin-bottom: 1.5rem;
}

.instruction-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: var(--radius);
    align-items: flex-start;
}

.instruction-item > i {
    font-size: 1.5rem;
    color: var(--primary-color);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.instruction-item strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-size: 1.05rem;
}

.instruction-item p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.instruction-item ul {
    margin: 0.5rem 0 0 0;
    padding-left: 1.5rem;
}

.instruction-item li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.instructions-warning {
    padding: 1rem;
    background-color: #fff3cd;
    border-left: 4px solid #ffc107;
    border-radius: var(--radius);
    color: #856404;
    line-height: 1.6;
}

[data-theme="dark"] .instructions-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #ffc107;
}

/* ============================================
   DARK MODE - ENHANCED VIDEO & MATERIALS
   ============================================ */

[data-theme="dark"] .video-card {
    background-color: var(--surface-color);
}

[data-theme="dark"] .video-info-card {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .info-content {
    background-color: rgba(99, 102, 241, 0.15);
}

[data-theme="dark"] .materials-section {
    background: linear-gradient(135deg, var(--surface-color) 0%, rgba(34, 197, 94, 0.08) 100%);
}

/* Assessment Tabs */
.assessment-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.tab-btn {
    padding: 0.75rem 1rem;
    background-color: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tab-btn:hover {
    color: var(--primary-color);
    background-color: var(--bg-color);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

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

.assessment-tab-content {
    display: none;
}

.assessment-tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Assessment Pages System */
.assessment-pages-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: var(--radius);
}

.pages-tabs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    flex: 1;
}

.page-tab {
    padding: 0.75rem 1.25rem;
    background-color: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.page-tab.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

#assessment-pages-container {
    position: relative;
}

.assessment-page {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.assessment-page.active {
    display: block;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--bg-color);
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--primary-color);
}

.page-header h4 {
    margin: 0;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.video-progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    margin: 1rem 0;
    overflow: hidden;
}

.video-progress-fill {
    height: 100%;
    background-color: var(--primary-color);
    width: 0%;
    transition: width 0.3s ease;
}

/* ============================================
   ASSESSMENT SECTION - WITH COPY/PASTE PROTECTION
   ============================================ */

.assessment-section {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    
    /* 🔒 DISABLE TEXT SELECTION */
    -webkit-user-select: none; /* Safari */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* IE10+/Edge */
    user-select: none; /* Standard */
    
    /* 🔒 DISABLE CONTEXT MENU (Right-click) */
    -webkit-touch-callout: none; /* iOS Safari */
}

/* Ensure inputs and textareas in assessment remain functional but protected */
.assessment-section input[type="radio"],
.assessment-section input[type="checkbox"],
.assessment-section textarea,
.assessment-section input[type="text"] {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.assessment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.quiz-timer {
    display: none; /* Hidden - using sticky timer instead */
}

.assessment-section .quiz-timer {
    display: none !important; /* Ensure it's hidden */
}

.sticky-timer {
    position: sticky;
    top: 0;
    background-color: var(--bg-color);
    padding: 1rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    z-index: 1;
}

.question-card {
    background-color: var(--bg-color);
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    scroll-margin-top: 75px;
}

.question-text {
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    line-height: 1.6;
}

.question-number {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.15rem;
}

.answer-option {
    display: flex;
    align-items: center;
    padding: 1rem;
    background-color: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.answer-option:hover {
    border-color: var(--primary-color);
}

.answer-option input[type="radio"] {
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.option-letter {
    font-weight: 700;
    color: var(--primary-color);
    margin-right: 0.75rem;
    font-size: 1.05rem;
    flex-shrink: 0;
    min-width: 30px;
}

.option-text {
    flex: 1;
    line-height: 1.5;
}

.results-section {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.results-card {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.results-icon {
    font-size: 5rem;
    color: var(--success-color);
    margin-bottom: 1rem;
}

.score-display {
    margin: 2rem 0;
}

.score-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.score-circle span {
    font-size: 2.5rem;
    font-weight: bold;
    color: white;
}

.results-details {
    text-align: left;
    margin: 2rem 0;
}

.dashboard-container {
    min-height: calc(100vh - 80px);
}

.dashboard-container .container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
    padding-top: 2rem;
}

.dashboard-sidebar {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.menu-item {
    padding: 1rem;
    border: none;
    background: none;
    text-align: left;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-color);
    font-size: 1rem;
}

.menu-item:hover {
    background-color: var(--bg-color);
}

.menu-item.active {
    background-color: var(--primary-color);
    color: white;
}

.dashboard-content {
    min-height: 500px;
}

.dashboard-section {
    display: none;
}

.dashboard-section.active {
    display: block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.stat-card i {
    font-size: 3rem;
    color: var(--primary-color);
}

.stat-info h3 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: var(--text-secondary);
}

.table-container {
    background-color: var(--surface-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background-color: var(--bg-color);
}

.data-table th, .data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 600;
}

.data-table tbody tr:hover {
    background-color: var(--bg-color);
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.lessons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.lesson-card {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.lesson-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.lesson-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.lesson-code {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.lesson-card-body h3 {
    margin-bottom: 0.5rem;
}

.lesson-card-footer {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
}

.empty-state-card {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-state-card i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.group-header {
    background-color: var(--primary-color) !important;
}

.group-header td {
    background-color: var(--primary-color) !important;
    color: white !important;
    font-weight: 600 !important;
    padding: 0.75rem !important;
}

.group-header:hover {
    background-color: var(--primary-dark) !important;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    z-index: 999;
}

.modal-overlay.active {
    display: block;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--surface-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    display: none;
    z-index: 1000;
}

.modal.active {
    display: block;
}

.modal-large {
    max-width: 700px;
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal form, .result-details-content {
    padding: 1.5rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* ========================================
   MOBILE & TABLET RESPONSIVE STYLES
   ======================================== */

/* Tablet Styles (768px - 1024px) */


/* Mobile Styles (max-width: 768px) - STUDENT PORTAL ONLY */


/* Small Mobile Styles (max-width: 480px) */


/* Quiz Navigation Styles */
#quiz-navigation {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    align-items: center;
    flex-wrap: wrap;
}

#page-indicator {
    text-align: center;
    color: var(--text-color);
    font-weight: bold;
    min-width: 120px;
}

#prev-page-btn,
#next-page-btn {
    flex: 1;
    min-width: 120px;
}

#submit-quiz-btn {
    width: 100%;
}

/* Fullscreen Button Mobile Fix */
.fullscreen-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.75rem 1.5rem;
}

/* Touch-friendly improvements - STUDENT PORTAL ONLY */
@media (hover: none) and (pointer: coarse) {
    /* Increase touch targets for student portal only */
    .btn:not(.dashboard-section .btn):not(.section-header .btn):not(.menu-item), .page-tab {
        min-height: 44px;
        min-width: 44px;
    }
    
    .answer-option {
        min-height: 50px;
    }
    
    input[type="radio"],
    input[type="checkbox"] {
        width: 20px;
        height: 20px;
    }
    
    /* Remove hover effects on touch devices - student portal only */
    .btn:not(.dashboard-section .btn):not(.section-header .btn):not(.menu-item):hover {
        transform: none;
    }
    
    /* Add active states for touch feedback - student portal only */
    .btn:not(.dashboard-section .btn):not(.section-header .btn):not(.menu-item):active {
        transform: scale(0.98);
    }
}

/* ============================================ */
/* TEACHER DASHBOARD MOBILE-FIRST DESIGN */
/* ============================================ */

/* Mobile Navigation & Hamburger Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.mobile-menu-toggle:hover {
    background-color: var(--bg-color);
}

.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 80px; /* Start below navbar */
    left: 280px; /* Start after sidebar width */
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1040; /* Lower than sidebar but higher than content */
    opacity: 0;
    transition: opacity 0.3s ease;
    /* Only allow clicks on the overlay itself, not on sidebar area */
    pointer-events: auto;
}

.mobile-menu-overlay.active {
    display: block;
    opacity: 1;
    /* When active, cover the area to the right of sidebar */
    left: 280px;
}

/* Mobile Dashboard Layout - Enhanced Scrolling */


/* Mobile Stats Grid */


/* Mobile Section Headers */


/* Mobile Lessons Grid */


/* Mobile Dashboard Tables - Compact Design with Scrolling */


/* Mobile Dashboard Sections - Compact Design */


/* Mobile Progress & Results Sections */


/* Mobile Responsive Improvements for Small Screens */


/* Mobile Teacher Dashboard Modals - CRITICAL SCROLLING FIX */


/* Prevent text selection on buttons (better UX) - STUDENT PORTAL ONLY */
.btn:not(.dashboard-section .btn):not(.section-header .btn):not(.menu-item), .page-tab, .answer-option {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Smooth scrolling for mobile */
html {
    scroll-behavior: smooth;
}

/* Better tap highlight color */
* {
    -webkit-tap-highlight-color: rgba(79, 70, 229, 0.1);
}

/* Prevent pull-to-refresh on mobile */
body {
    overscroll-behavior-y: contain;
}

/* Safe area insets for notched devices */
@supports (padding: max(0px)) {
    .navbar,
    .modal-header,
    .modal-footer,
    #quiz-navigation {
        padding-left: max(1rem, env(safe-area-inset-left));
        padding-right: max(1rem, env(safe-area-inset-right));
    }
    
    .navbar {
        padding-top: max(1rem, env(safe-area-inset-top));
    }
    
    .modal-footer,
    #quiz-navigation {
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
    }
}

/* Landscape Mobile Optimizations */


/* Mobile Portrait - Show rotate notice */


/* Document Viewer Mobile Optimizations */
.document-fullscreen-modal {
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

.document-fullscreen-modal iframe {
    touch-action: pan-x pan-y pinch-zoom;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
}





/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Enhanced error message styling for blocking messages */
.error-message {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, sans-serif;
    font-size: 0.95rem;
    padding: 1.5rem;
    margin: 1rem 0;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.2);
    border-left: 5px solid #dc2626;
}

.error-message.show {
    display: block;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
/* ========================================
   STICKY ASSESSMENT HEADER & TIMER BAR
   ======================================== */
.assessment-header,
#assessment-header {
    position: sticky !important;
    top: 0 !important;
    top: env(safe-area-inset-top, 0px) !important;
    z-index: 1040 !important;
    background: rgba(255, 255, 255, 0.96) !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 14px !important;
    padding: 0.6rem 0.85rem !important;
    margin-bottom: 1.25rem !important;
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 0.5rem !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08) !important;
    width: 100% !important;
    box-sizing: border-box !important;
}

[data-theme="dark"] .assessment-header,
[data-theme="dark"] #assessment-header {
    background: rgba(15, 23, 42, 0.96) !important;
    border-color: #334155 !important;
}

.assessment-header-title {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex: 1 1 auto !important;
    text-align: center !important;
    min-width: 0 !important;
}

.assessment-header-title h3 {
    margin: 0 !important;
    font-size: 1.05rem !important;
    font-weight: 700 !important;
    color: var(--text-color, #1e293b) !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
}

[data-theme="dark"] .assessment-header-title h3 {
    color: #f1f5f9 !important;
}

.assessment-header-controls {
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
    flex-shrink: 0 !important;
}

#sticky-timer,
.quiz-timer {
    position: static !important;
    background: linear-gradient(135deg, #2563eb, #1d4ed8) !important;
    color: white !important;
    padding: 7px 14px !important;
    border-radius: 50px !important;
    font-size: 0.95rem !important;
    font-weight: 700 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 6px !important;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3) !important;
    border: 1.5px solid rgba(255, 255, 255, 0.3) !important;
    min-height: 38px !important;
    flex-shrink: 0 !important;
    box-sizing: border-box !important;
}

#sticky-timer i,
.quiz-timer i {
    font-size: 0.95rem !important;
    color: white !important;
    animation: pulse 2s infinite !important;
}

#violation-counter-container {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: flex-end !important;
    flex-shrink: 0 !important;
    margin: 0 !important;
}

#violation-counter-main {
    position: static !important;
    padding: 7px 14px !important;
    border-radius: 50px !important;
    font-size: 0.95rem !important;
    font-weight: 700 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
    color: white !important;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3) !important;
    border: 1.5px solid rgba(255, 255, 255, 0.3) !important;
    min-height: 38px !important;
    box-sizing: border-box !important;
    cursor: pointer !important;
    flex-shrink: 0 !important;
    transition: transform 0.15s ease !important;
}

#violation-counter-main:active {
    transform: scale(0.96) !important;
}

#violation-counter-collapsed {
    padding: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 0.4rem !important;
    color: white !important;
    white-space: nowrap !important;
}

#violation-counter-collapsed i {
    font-size: 0.95rem !important;
    color: white !important;
}

#violation-counter-content {
    padding: 10px 14px !important;
    font-size: 0.85rem !important;
    font-weight: 500 !important;
    color: #ffffff !important;
    display: none;
    max-width: 280px !important;
    text-align: left !important;
}

#timer-display {
    min-width: 50px !important;
    text-align: center !important;
    font-family: 'Courier New', monospace !important;
    letter-spacing: 2px !important;
    color: white !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3) !important;
    font-weight: 800 !important;
}

/* Color change based on time remaining */
#sticky-timer.timer-warning {
    background: linear-gradient(135deg, #f59e0b, #d97706) !important;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4) !important;
}

#sticky-timer.timer-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4) !important;
    animation: pulse-danger 0.6s ease-in-out infinite !important;
}

@keyframes pulse-timer {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes pulse-danger {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 0 4px 25px rgba(239, 68, 68, 0.6);
    }
}

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

/* Mobile responsive timer */


/* Extra small devices */


/* Ensure text is always readable */
#timer-display {
    color: white !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3) !important;
    font-weight: 800 !important;
}

#sticky-timer.timer-warning #timer-display {
    color: white !important;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4) !important;
}

#sticky-timer.timer-danger #timer-display {
    color: white !important;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4) !important;
    font-weight: 900 !important;
}

/* ========================================
   VIDEO CAROUSEL MOBILE OPTIMIZATION
   ======================================== */
#video-carousel-controls {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 1rem !important;
    margin-top: 1rem !important;
    padding: 1rem !important;
    background: var(--bg-secondary) !important;
    border-radius: 8px !important;
    flex-wrap: wrap !important;
}

#video-carousel-controls button {
    min-width: 100px !important;
    padding: 10px 15px !important;
    font-size: 0.95rem !important;
    min-height: 44px !important;
    cursor: pointer !important;
}

#video-carousel-controls button:disabled {
    opacity: 0.5 !important;
    cursor: not-allowed !important;
}

#video-carousel-controls button:not(:disabled):hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15) !important;
}

/* Mobile responsive carousel controls */


/* Extra small devices */


/* ========================================
   VIOLATION COUNTER MOBILE OPTIMIZATION
   ======================================== */




/* ========================================
   COMPREHENSIVE MOBILE FIXES - ALL SECTIONS
   ======================================== */

/* Account Modal - Mobile */


/* Edit Account & Change Password Modals - Mobile */


/* How to Buy Modal - Mobile */


/* Lesson Plan Preview Modal - Mobile */


/* Loading Overlay - Global Foundation */
.loading-overlay,
#loading-overlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    height: 100dvh !important;
    background: rgba(15, 23, 42, 0.75) !important;
    backdrop-filter: blur(6px) !important;
    -webkit-backdrop-filter: blur(6px) !important;
    z-index: 999999 !important;
    display: none !important;
    align-items: center !important;
    justify-content: center !important;
    flex-direction: column !important;
    gap: 1rem !important;
    color: #ffffff !important;
    padding: 1.5rem !important;
    box-sizing: border-box !important;
}

.loading-overlay.active,
#loading-overlay.active {
    display: flex !important;
}

.loading-spinner,
#loading-overlay .loading-spinner {
    width: 48px !important;
    height: 48px !important;
    border: 4px solid rgba(255, 255, 255, 0.2) !important;
    border-top-color: #4f46e5 !important;
    border-radius: 50% !important;
    animation: spin 0.8s linear infinite !important;
}

.loading-text,
#loading-text {
    font-size: 1.05rem !important;
    font-weight: 600 !important;
    color: #ffffff !important;
    text-align: center !important;
    max-width: 420px !important;
    line-height: 1.5 !important;
}

/* Navbar - Mobile Fixes */


/* Dashboard Section Content - Mobile Scroll Fix */


/* Premium/Credits Sections - Mobile */


/* Voucher Input - Mobile */


/* Student Portal - Assessment Violation Modal - Mobile */


/* Result Details Content - Mobile */


/* View Results Modal - Mobile */


/* Add Student Modal - Mobile */


/* Update Password Modal - Mobile */


/* Tools Section - Enhanced Mobile */


/* Error Reporter Modal - Mobile */


/* General - Prevent horizontal scroll on mobile */


/* Extra small devices - additional fixes */


/* ========================================
   QUESTION NAVIGATOR / ANSWERED BOXES
   ======================================== */
.quiz-palette-container {
    background: var(--surface-color, #ffffff);
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 12px;
    padding: 0.85rem 1rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .quiz-palette-container {
    background: #1e293b;
    border-color: #334155;
}

.quiz-palette-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.quiz-palette-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-color, #1e293b);
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.quiz-palette-legend {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    font-size: 0.82rem;
    color: var(--text-secondary, #64748b);
    font-weight: 600;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 3px;
    display: inline-block;
}

.legend-answered {
    background: #10b981;
}

.legend-unanswered {
    background: #ef4444;
}

.quiz-palette-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
    max-height: 130px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
    padding: 4px 2px;
}

.quiz-palette-grid::-webkit-scrollbar {
    width: 6px;
}

.quiz-palette-grid::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 9999px;
}

.quiz-palette-grid::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 9999px;
}

[data-theme="dark"] .quiz-palette-grid::-webkit-scrollbar-thumb {
    background: #475569;
}

[data-theme="dark"] .quiz-palette-grid::-webkit-scrollbar-track {
    background: #1e293b;
}

.quiz-palette-item {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border: 2px solid transparent;
    padding: 0;
    user-select: none;
    box-sizing: border-box;
}

.quiz-palette-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

.quiz-palette-item:active {
    transform: translateY(0);
}

/* 🟢 ANSWERED: Vibrant Emerald Green */
.quiz-palette-item.palette-answered {
    background: linear-gradient(135deg, #10b981, #059669) !important;
    color: #ffffff !important;
    border-color: #047857 !important;
    box-shadow: 0 2px 6px rgba(16, 185, 129, 0.3) !important;
}

/* 🔴 UNANSWERED: Clean Rose/Crimson */
.quiz-palette-item.palette-unanswered {
    background: #fef2f2 !important;
    color: #dc2626 !important;
    border: 1.5px solid #fecaca !important;
}

[data-theme="dark"] .quiz-palette-item.palette-unanswered {
    background: rgba(239, 68, 68, 0.14) !important;
    color: #f87171 !important;
    border-color: rgba(239, 68, 68, 0.3) !important;
}

/* 🔵 ACTIVE / CURRENT QUESTION RING */
.quiz-palette-item.palette-current {
    box-shadow: 0 0 0 3px #3b82f6 !important;
    transform: scale(1.08) !important;
    z-index: 2 !important;
    font-weight: 800 !important;
}

.palette-check-icon {
    font-size: 0.65rem;
    position: absolute;
    top: 2px;
    right: 2px;
    opacity: 0.9;
}

/* Question card status badge */
.question-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.q-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.25rem 0.65rem;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.q-status-badge.q-answered {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.q-status-badge.q-unanswered {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

[data-theme="dark"] .q-status-badge.q-answered {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
    border-color: #059669;
}

[data-theme="dark"] .q-status-badge.q-unanswered {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
    border-color: #dc2626;
}

/* Lifeline & Locked Questions System */
.quiz-palette-item.palette-locked {
    background: #f3f4f6 !important;
    color: #9ca3af !important;
    border: 1.5px solid #d1d5db !important;
    opacity: 0.65 !important;
    cursor: not-allowed !important;
}

[data-theme="dark"] .quiz-palette-item.palette-locked {
    background: rgba(107, 114, 128, 0.15) !important;
    color: #6b7280 !important;
    border-color: #4b5563 !important;
}

.palette-lock-icon {
    font-size: 0.65rem;
    position: absolute;
    top: 3px;
    right: 3px;
    opacity: 0.8;
}

.answer-option.option-locked {
    background: rgba(243, 244, 246, 0.6);
    border-color: #d1d5db;
    cursor: default !important;
}

[data-theme="dark"] .answer-option.option-locked {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.1);
}

.btn-set-answer:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.btn-use-lifeline {
    transition: all 0.2s ease;
}

.btn-use-lifeline:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(239, 68, 68, 0.2);
}