/* ===================================
   DESIGN SYSTEM & CSS VARIABLES
   =================================== */
:root {
    /* Primary Colors */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;

    /* Accent Colors */
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-teal: #14b8a6;
    --accent-orange: #f97316;
    --accent-emerald: #10b981;
    --accent-rose: #f43f5e;
    --accent-cyan: #06b6d4;
    --accent-amber: #f59e0b;

    /* Neutral Colors */
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --gray-950: #020617;

    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* Theme Colors (Light mode defaults) */
    --bg-primary: #f0f4ff;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --bg-modal: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-sidebar: #e2e8f0;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);

    /* Layout */
    --sidebar-width: 280px;
    --sidebar-collapsed: 80px;
    --header-height: 60px;
    --border-radius: 16px;
    --border-radius-sm: 10px;
    --border-radius-xs: 6px;

    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --gradient-warm: linear-gradient(135deg, #f97316, #ec4899);
    --gradient-cool: linear-gradient(135deg, #06b6d4, #3b82f6);
    --gradient-nature: linear-gradient(135deg, #10b981, #14b8a6);
    --gradient-sunset: linear-gradient(135deg, #f43f5e, #f97316);
    --gradient-hero: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #8b5cf6 100%);
}

/* Dark mode */
[data-theme="dark"] {
    --bg-primary: #0a0f1e;
    --bg-secondary: #111827;
    --bg-card: #1a2236;
    --bg-sidebar: #070b14;
    --bg-modal: #1a2236;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #1e2d4a;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
    --glass-bg: rgba(26, 34, 54, 0.8);
    --glass-border: rgba(59, 130, 246, 0.15);
}

/* ===================================
   BASE RESET & DEFAULTS
   =================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    transition: background var(--transition-base), color var(--transition-base);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: var(--font-main);
}

img {
    max-width: 100%;
    height: auto;
}

/* ===================================
   SPLASH SCREEN
   =================================== */
.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.splash-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.splash-content {
    text-align: center;
    color: white;
}

.splash-icon {
    font-size: 80px;
    animation: splash-bounce 1.5s ease-in-out infinite;
    filter: drop-shadow(0 0 30px rgba(255, 255, 255, 0.3));
}

@keyframes splash-bounce {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.1); }
}

.splash-title {
    font-size: 2rem;
    font-weight: 800;
    margin: 1rem 0 0.5rem;
    font-family: var(--font-display);
}

.splash-subtitle {
    font-size: 1rem;
    opacity: 0.8;
    margin-bottom: 2rem;
}

.splash-loader {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
    margin: 0 auto;
    overflow: hidden;
}

.splash-loader-bar {
    height: 100%;
    width: 0%;
    background: white;
    border-radius: 4px;
    animation: splash-load 2s ease-in-out forwards;
}

@keyframes splash-load {
    0% { width: 0%; }
    100% { width: 100%; }
}

/* ===================================
   SIDEBAR
   =================================== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform var(--transition-base), width var(--transition-base);
    overflow: hidden;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-header {
    display: flex;
    align-items: center;
    padding: 1.25rem 1rem;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    min-height: 72px;
}

.logo-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.logo-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.1rem;
    color: white;
    white-space: nowrap;
}

.logo-sub {
    font-size: 0.7rem;
    color: var(--gray-400);
    white-space: nowrap;
}

.sidebar-toggle {
    display: none;
    background: none;
    width: 28px;
    height: 20px;
    flex-direction: column;
    justify-content: space-between;
    margin-left: auto;
}

.sidebar-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--gray-400);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.nav-menu {
    list-style: none;
    padding: 1rem 0.75rem;
    flex: 1;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    margin-bottom: 0.25rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    gap: 0.75rem;
    position: relative;
    overflow: hidden;
    user-select: none;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: all var(--transition-base);
    border-radius: var(--border-radius-sm);
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.06);
}

.nav-item:hover::before {
    width: 4px;
    opacity: 1;
}

.nav-item.active {
    background: rgba(59, 130, 246, 0.15);
    color: var(--primary-300);
}

.nav-item.active::before {
    width: 4px;
    opacity: 1;
}

.nav-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    width: 28px;
    text-align: center;
}

.nav-text {
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
}

.nav-badge {
    margin-left: auto;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    min-width: 24px;
    text-align: center;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.theme-switch {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.theme-icon {
    font-size: 1rem;
}

.switch {
    position: relative;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gray-700);
    border-radius: 24px;
    transition: var(--transition-fast);
}

.slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.switch input:checked + .slider {
    background: var(--primary-500);
}

.switch input:checked + .slider::before {
    transform: translateX(20px);
}

/* ===================================
   MOBILE HEADER
   =================================== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: var(--bg-sidebar);
    color: white;
    align-items: center;
    padding: 0 1rem;
    z-index: 999;
    gap: 1rem;
}

.mobile-menu-btn {
    background: none;
    width: 28px;
    height: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2.5px;
    background: white;
    border-radius: 2px;
    transition: var(--transition-fast);
}

.mobile-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
}

/* ===================================
   MAIN CONTENT
   =================================== */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-base);
}

.page {
    display: none;
    padding: 2rem;
    animation: fadeInUp 0.5s ease;
}

.page.active {
    display: block;
}

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

/* ===================================
   PAGE HEADER
   =================================== */
.page-header {
    background: var(--gradient-hero);
    border-radius: var(--border-radius);
    padding: 3rem;
    margin-bottom: 2rem;
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
    min-height: 240px;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(139,92,246,0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.page-header.compact {
    min-height: auto;
    padding: 2rem;
}

.page-header-content {
    position: relative;
    z-index: 1;
    max-width: 60%;
}

.page-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    line-height: 1.2;
}

.page-header .page-title {
    color: white;
}

.page-description {
    font-size: 1rem;
    opacity: 0.85;
    line-height: 1.7;
    max-width: 600px;
}

.gradient-text {
    background: linear-gradient(135deg, #fff 0%, #93c5fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Hero Illustration */
.hero-illustration {
    position: relative;
    z-index: 1;
}

.hero-brain {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 160px;
    height: 160px;
}

.brain-emoji {
    font-size: 80px;
    z-index: 2;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.brain-pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    animation: pulse-ring 2.5s ease-out infinite;
}

.pulse-2 { animation-delay: 0.5s; }
.pulse-3 { animation-delay: 1s; }

@keyframes pulse-ring {
    0% { transform: scale(0.5); opacity: 0.8; }
    100% { transform: scale(1.5); opacity: 0; }
}

/* ===================================
   STATS GRID
   =================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-500);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.stat-bar {
    height: 4px;
    background: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
}

[data-theme="dark"] .stat-bar {
    background: var(--gray-700);
}

.stat-bar-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 1.5s ease;
}

/* ===================================
   FEATURES SECTION
   =================================== */
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
}

.feature-card {
    padding: 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-300);
}

.feature-icon-wrap {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
}

/* ===================================
   SEARCH BAR
   =================================== */
.search-bar {
    position: relative;
    margin-bottom: 1.5rem;
    max-width: 500px;
}

.search-input {
    width: 100%;
    padding: 0.85rem 1.25rem 0.85rem 3rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-family: var(--font-main);
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all var(--transition-fast);
    outline: none;
}

.search-input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.1rem;
    pointer-events: none;
}

/* ===================================
   CARDS GRID (Lectures, Practicals, Tests)
   =================================== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.content-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    transition: transform var(--transition-base);
    transform: scaleX(0);
    transform-origin: left;
}

.content-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.content-card:hover::before {
    transform: scaleX(1);
}

.content-card .card-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.75rem;
}

.content-card .card-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.content-card .card-excerpt {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.content-card .card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.card-tag {
    font-size: 0.7rem;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-action {
    font-size: 0.8rem;
    color: var(--primary-500);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

.card-action::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.content-card:hover .card-action::after {
    transform: translateX(4px);
}

/* Card color variants */
.content-card[data-color="blue"]::before { background: var(--gradient-cool); }
.content-card[data-color="blue"] .card-number { background: var(--gradient-cool); }
.content-card[data-color="purple"]::before { background: var(--gradient-primary); }
.content-card[data-color="purple"] .card-number { background: var(--gradient-primary); }
.content-card[data-color="green"]::before { background: var(--gradient-nature); }
.content-card[data-color="green"] .card-number { background: var(--gradient-nature); }
.content-card[data-color="orange"]::before { background: var(--gradient-sunset); }
.content-card[data-color="orange"] .card-number { background: var(--gradient-sunset); }
.content-card[data-color="teal"]::before { background: linear-gradient(135deg, #14b8a6, #06b6d4); }
.content-card[data-color="teal"] .card-number { background: linear-gradient(135deg, #14b8a6, #06b6d4); }

/* ===================================
   MODAL
   =================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
    animation: modalFadeIn 0.3s ease;
}

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

.modal-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
}

.modal-content {
    position: relative;
    background: var(--bg-modal);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    padding: 2rem;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideUp 0.4s ease;
}

.modal-content.wide {
    max-width: 900px;
}

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

.modal-close {
    position: sticky;
    top: 0;
    float: right;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gray-100);
    color: var(--gray-600);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 10;
}

[data-theme="dark"] .modal-close {
    background: var(--gray-800);
    color: var(--gray-300);
}

.modal-close:hover {
    background: var(--danger);
    color: white;
    transform: rotate(90deg);
}

.modal-body h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    padding-right: 50px;
}

.modal-body .modal-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.modal-body .modal-text {
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.8;
    white-space: pre-line;
}

.modal-body .modal-text p {
    margin-bottom: 1rem;
}

/* ===================================
   DETECTION PAGE
   =================================== */
.detection-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.detection-tab {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.detection-tab:hover {
    border-color: var(--primary-400);
    color: var(--primary-500);
}

.detection-tab.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.detection-panel {
    display: none;
    animation: fadeInUp 0.4s ease;
}

.detection-panel.active {
    display: block;
}

.detection-card {
    padding: 2rem;
    border-radius: var(--border-radius);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
}

.detection-card h2 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.detection-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

/* Face Grid */
.face-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.face-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--bg-secondary);
}

.face-option:hover {
    border-color: var(--primary-400);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
}

.face-option.selected {
    border-color: var(--primary-500);
    background: rgba(59, 130, 246, 0.08);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.face-emoji {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    transition: transform var(--transition-fast);
}

.face-option:hover .face-emoji {
    transform: scale(1.15);
}

.face-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Detection Result */
.detection-result {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    animation: fadeInUp 0.4s ease;
}

.detection-result.hidden {
    display: none;
}

.detection-result h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--primary-500);
}

.result-content {
    color: var(--text-primary);
    line-height: 1.7;
}

.result-meter {
    height: 12px;
    background: var(--gray-200);
    border-radius: 12px;
    overflow: hidden;
    margin: 0.75rem 0;
}

[data-theme="dark"] .result-meter {
    background: var(--gray-700);
}

.result-meter-fill {
    height: 100%;
    border-radius: 12px;
    transition: width 1s ease;
}

.result-meter-fill.high { background: var(--gradient-nature); }
.result-meter-fill.medium { background: var(--gradient-warm); }
.result-meter-fill.low { background: var(--gradient-sunset); }

.result-category {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.85rem;
    margin: 0.5rem 0;
}

.result-category.high {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-emerald);
}

.result-category.medium {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-amber);
}

.result-category.low {
    background: rgba(244, 63, 94, 0.15);
    color: var(--accent-rose);
}

.result-tips {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(59, 130, 246, 0.06);
    border-radius: var(--border-radius-xs);
    border-left: 4px solid var(--primary-500);
}

.result-tips h4 {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--primary-600);
}

.result-tips ul {
    padding-left: 1.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.result-tips li {
    margin-bottom: 0.35rem;
}

/* Finger Test */
.finger-test-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.finger-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    user-select: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.3);
}

.finger-circle:hover {
    transform: scale(1.05);
}

.finger-circle:active {
    transform: scale(0.95);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.finger-text {
    color: white;
    font-weight: 700;
    font-size: 1rem;
    z-index: 2;
    text-align: center;
    pointer-events: none;
}

.finger-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 0 0 100px 100px;
    transition: height 0.1s linear;
    pointer-events: none;
}

.finger-stats {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.finger-stat {
    text-align: center;
}

.finger-stat-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.finger-stat-value {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary-500);
}

/* Voice Test */
.voice-test-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.voice-btn {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    transition: all var(--transition-base);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.3);
}

.voice-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 40px rgba(59, 130, 246, 0.4);
}

.voice-btn.recording {
    background: var(--gradient-sunset);
    animation: recording-pulse 1.5s ease-in-out infinite;
    box-shadow: 0 8px 30px rgba(244, 63, 94, 0.4);
}

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

.voice-btn-icon {
    font-size: 2rem;
}

.voice-btn-text {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.voice-waves {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 40px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.voice-waves.active {
    opacity: 1;
}

.voice-wave {
    width: 4px;
    height: 10px;
    background: var(--primary-500);
    border-radius: 4px;
    animation: none;
}

.voice-waves.active .voice-wave {
    animation: wave 0.6s ease-in-out infinite;
}

.voice-waves.active .voice-wave:nth-child(1) { animation-delay: 0s; }
.voice-waves.active .voice-wave:nth-child(2) { animation-delay: 0.1s; }
.voice-waves.active .voice-wave:nth-child(3) { animation-delay: 0.2s; }
.voice-waves.active .voice-wave:nth-child(4) { animation-delay: 0.3s; }
.voice-waves.active .voice-wave:nth-child(5) { animation-delay: 0.4s; }

@keyframes wave {
    0%, 100% { height: 10px; }
    50% { height: 35px; }
}

.voice-timer {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-muted);
}

.voice-text-alternative {
    width: 100%;
    max-width: 500px;
    margin-top: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.voice-text-alternative p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.voice-textarea {
    width: 100%;
    min-height: 100px;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-main);
    font-size: 0.95rem;
    resize: vertical;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast);
    outline: none;
    margin-bottom: 0.75rem;
}

.voice-textarea:focus {
    border-color: var(--primary-500);
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
    padding: 0.7rem 1.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-400);
    color: var(--primary-500);
}

.btn-success {
    background: var(--gradient-nature);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

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

/* ===================================
   SIMULATIONS
   =================================== */
.simulations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.25rem;
}

.sim-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.sim-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    transition: transform var(--transition-base);
    transform: scaleX(0);
    transform-origin: left;
}

.sim-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.sim-card:hover::before {
    transform: scaleX(1);
}

.sim-card:nth-child(1)::before { background: var(--gradient-cool); }
.sim-card:nth-child(2)::before { background: var(--gradient-sunset); }
.sim-card:nth-child(3)::before { background: var(--gradient-nature); }
.sim-card:nth-child(4)::before { background: var(--gradient-warm); }
.sim-card:nth-child(5)::before { background: var(--gradient-primary); }
.sim-card:nth-child(6)::before { background: linear-gradient(135deg, #06b6d4, #8b5cf6); }
.sim-card:nth-child(7)::before { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.sim-card:nth-child(8)::before { background: linear-gradient(135deg, #ec4899, #8b5cf6); }

.sim-card-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.sim-icon {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.sim-card:nth-child(1) .sim-icon { background: rgba(6, 182, 212, 0.15); }
.sim-card:nth-child(2) .sim-icon { background: rgba(244, 63, 94, 0.15); }
.sim-card:nth-child(3) .sim-icon { background: rgba(16, 185, 129, 0.15); }
.sim-card:nth-child(4) .sim-icon { background: rgba(249, 115, 22, 0.15); }
.sim-card:nth-child(5) .sim-icon { background: rgba(59, 130, 246, 0.15); }
.sim-card:nth-child(6) .sim-icon { background: rgba(139, 92, 246, 0.15); }
.sim-card:nth-child(7) .sim-icon { background: rgba(245, 158, 11, 0.15); }
.sim-card:nth-child(8) .sim-icon { background: rgba(236, 72, 153, 0.15); }

.sim-card-info h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.sim-card-info .sim-skill {
    font-size: 0.75rem;
    color: var(--primary-500);
    font-weight: 600;
}

.sim-card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1rem;
}

.sim-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sim-difficulty {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
}

.sim-difficulty.easy {
    background: rgba(16, 185, 129, 0.12);
    color: var(--accent-emerald);
}

.sim-difficulty.medium {
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent-amber);
}

.sim-difficulty.hard {
    background: rgba(244, 63, 94, 0.12);
    color: var(--accent-rose);
}

.sim-start-btn {
    font-size: 0.8rem;
    color: var(--primary-500);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 4px;
    background: none;
}

.sim-start-btn::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.sim-card:hover .sim-start-btn::after {
    transform: translateX(4px);
}

/* Simulation Game Area */
.sim-game {
    max-width: 700px;
    margin: 0 auto;
}

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

.sim-game-header h2 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.sim-progress {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 0.75rem;
}

.sim-progress-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.sim-progress-bar {
    width: 200px;
    height: 6px;
    background: var(--gray-200);
    border-radius: 6px;
    overflow: hidden;
}

[data-theme="dark"] .sim-progress-bar {
    background: var(--gray-700);
}

.sim-progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 6px;
    transition: width var(--transition-base);
}

.sim-scenario {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--primary-500);
}

.sim-scenario-label {
    font-size: 0.75rem;
    color: var(--primary-500);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.sim-scenario-text {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
}

.sim-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.sim-option {
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    line-height: 1.5;
    background: var(--bg-card);
    text-align: left;
    color: var(--text-primary);
}

.sim-option:hover {
    border-color: var(--primary-400);
    background: rgba(59, 130, 246, 0.04);
}

.sim-option.selected {
    border-color: var(--primary-500);
    background: rgba(59, 130, 246, 0.08);
}

.sim-option.correct {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.08);
}

.sim-option.wrong {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.08);
}

.sim-feedback {
    padding: 1.25rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    line-height: 1.6;
    animation: fadeInUp 0.3s ease;
}

.sim-feedback.positive {
    background: rgba(16, 185, 129, 0.1);
    border-left: 4px solid var(--success);
    color: var(--text-primary);
}

.sim-feedback.negative {
    background: rgba(244, 63, 94, 0.1);
    border-left: 4px solid var(--danger);
    color: var(--text-primary);
}

.sim-feedback.neutral {
    background: rgba(59, 130, 246, 0.1);
    border-left: 4px solid var(--info);
    color: var(--text-primary);
}

.sim-next-btn {
    width: 100%;
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    font-size: 1rem;
}

/* Simulation Results */
.sim-results {
    text-align: center;
    padding: 2rem 0;
}

.sim-results-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.sim-results h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.sim-results-score {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    margin: 1rem 0;
}

.sim-results-score.high { color: var(--accent-emerald); }
.sim-results-score.medium { color: var(--accent-amber); }
.sim-results-score.low { color: var(--accent-rose); }

.sim-results-details {
    text-align: left;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.sim-results-details h4 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--primary-500);
}

.sim-results-details ul {
    padding-left: 1.25rem;
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* ===================================
   GLOSSARY
   =================================== */
.glossary-alphabet {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.alpha-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-xs);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.alpha-btn:hover,
.alpha-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.glossary-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.glossary-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.glossary-item:hover {
    border-color: var(--primary-300);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.08);
}

.glossary-term {
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary);
    transition: background var(--transition-fast);
}

.glossary-term:hover {
    background: rgba(59, 130, 246, 0.04);
}

.glossary-term-text {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.glossary-term-letter {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

.glossary-arrow {
    transition: transform var(--transition-fast);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.glossary-item.open .glossary-arrow {
    transform: rotate(180deg);
}

.glossary-definition {
    padding: 0 1.25rem 1rem 1.25rem;
    display: none;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    margin-left: 3.25rem;
}

.glossary-item.open .glossary-definition {
    display: block;
    animation: fadeInUp 0.3s ease;
}

/* Glossary Tooltip */
.glossary-tooltip {
    position: fixed;
    max-width: 350px;
    padding: 1rem 1.25rem;
    background: var(--bg-sidebar);
    color: white;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    line-height: 1.6;
    z-index: 9999;
    pointer-events: none;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.glossary-tooltip.visible {
    opacity: 1;
    transform: translateY(0);
}

.glossary-tooltip.hidden {
    display: none;
}

/* ===================================
   TEST AREA
   =================================== */
.test-area {
    max-width: 700px;
    margin: 0 auto;
}

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

.test-header h2 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.test-progress {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 0.5rem;
}

.test-progress-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
}

.test-progress-bar {
    width: 200px;
    height: 6px;
    background: var(--gray-200);
    border-radius: 6px;
    overflow: hidden;
}

[data-theme="dark"] .test-progress-bar {
    background: var(--gray-700);
}

.test-progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 6px;
    transition: width var(--transition-base);
}

.test-question {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--primary-500);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.test-options {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.test-option {
    padding: 0.85rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    background: var(--bg-card);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-align: left;
    color: var(--text-primary);
}

.test-option:hover {
    border-color: var(--primary-400);
}

.test-option .option-letter {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    flex-shrink: 0;
    color: var(--text-secondary);
}

[data-theme="dark"] .test-option .option-letter {
    background: var(--gray-700);
}

.test-option.selected {
    border-color: var(--primary-500);
    background: rgba(59, 130, 246, 0.06);
}

.test-option.selected .option-letter {
    background: var(--primary-500);
    color: white;
}

.test-option.correct {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.06);
}

.test-option.correct .option-letter {
    background: var(--success);
    color: white;
}

.test-option.wrong {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.06);
}

.test-option.wrong .option-letter {
    background: var(--danger);
    color: white;
}

.test-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

.test-results {
    text-align: center;
    padding: 2rem 0;
}

.test-results-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.test-results h2 {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
}

.test-results-score {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    margin: 1rem 0;
}

.test-results-score.high { color: var(--accent-emerald); }
.test-results-score.medium { color: var(--accent-amber); }
.test-results-score.low { color: var(--accent-rose); }

.test-results-breakdown {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.test-results-stat {
    text-align: center;
}

.test-results-stat-num {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
}

.test-results-stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===================================
   UTILITY CLASSES
   =================================== */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

/* ===================================
   SCROLLBAR
   =================================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 6px;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--gray-700);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 1024px) {
    .page-header {
        flex-direction: column;
        text-align: center;
        min-height: auto;
        padding: 2rem;
    }

    .page-header-content {
        max-width: 100%;
    }

    .hero-illustration {
        margin-top: 1rem;
    }

    .hero-brain {
        width: 120px;
        height: 120px;
    }

    .brain-emoji {
        font-size: 60px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 5px 0 30px rgba(0, 0, 0, 0.3);
    }

    .mobile-header {
        display: flex;
    }

    .main-content {
        margin-left: 0;
        padding-top: var(--header-height);
    }

    .page {
        padding: 1.25rem;
    }

    .page-title {
        font-size: 1.5rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

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

    .face-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .detection-tabs {
        flex-direction: column;
    }

    .modal-content {
        width: 95%;
        padding: 1.25rem;
        max-height: 90vh;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

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

    .face-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .finger-stats {
        flex-direction: column;
    }

    .page-header {
        padding: 1.5rem;
    }
}

/* ===================================
   FILE HUB & UPLOAD STYLES (FAYLLAR OMBORI)
   =================================== */
.page-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.file-storage-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-500);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.file-upload-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.75rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px var(--shadow-color);
}

.upload-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.upload-card-title-wrap {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.upload-badge-icon {
    font-size: 1.75rem;
    background: var(--gradient-primary);
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.upload-dropzone {
    border: 2px dashed var(--primary-300);
    background: rgba(59, 130, 246, 0.03);
    border-radius: var(--border-radius-sm);
    padding: 2.25rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    margin-bottom: 1.5rem;
}

.upload-dropzone:hover,
.upload-dropzone.dragover {
    border-color: var(--primary-600);
    background: rgba(59, 130, 246, 0.08);
    transform: translateY(-2px);
}

.file-input-hidden {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
}

.dropzone-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.browse-link {
    color: var(--primary-500);
    text-decoration: underline;
    font-weight: 600;
}

.dropzone-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.selected-file-preview {
    margin-top: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.btn-clear-selection {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--danger);
    cursor: pointer;
    line-height: 1;
}

.upload-controls-grid {
    display: grid;
    grid-template-columns: 1.2fr 1.2fr 1.5fr auto;
    gap: 1rem;
    align-items: flex-end;
}

@media (max-width: 900px) {
    .upload-controls-grid {
        grid-template-columns: 1fr;
    }
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.control-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.select-input,
.text-input {
    width: 100%;
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xs);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: var(--font-main);
    outline: none;
    transition: border-color var(--transition-fast);
}

.select-input:focus,
.text-input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.btn-upload-now {
    padding: 0.65rem 1.25rem;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    font-weight: 600;
}

.file-hub-tabs {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.file-tab {
    padding: 0.6rem 1.15rem;
    border-radius: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.file-tab:hover,
.file-tab.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.25);
}

/* Slots Grid: 15 Cards */
.file-slots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.file-slot-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.file-slot-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px var(--shadow-color);
    border-color: var(--primary-300);
}

.file-slot-card.has-file {
    border-left: 4px solid var(--success);
}

.file-slot-card.empty-file {
    border-left: 4px solid var(--warning);
}

.slot-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.slot-number-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-600);
}

.slot-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.slot-file-info {
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: var(--border-radius-xs);
    padding: 0.75rem;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.slot-file-icon {
    font-size: 1.75rem;
}

.slot-file-details {
    flex: 1;
    overflow: hidden;
}

.slot-file-name {
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.slot-file-size {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.slot-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.btn-slot-upload {
    flex: 1;
    padding: 0.45rem 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-600);
    border: 1px dashed var(--primary-400);
    border-radius: var(--border-radius-xs);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
}

.btn-slot-upload:hover {
    background: var(--primary-500);
    color: white;
    border-style: solid;
}

.btn-slot-download {
    padding: 0.45rem 0.75rem;
    background: var(--success);
    color: white;
    border-radius: var(--border-radius-xs);
    font-size: 0.8rem;
    font-weight: 600;
}

.btn-slot-delete {
    padding: 0.45rem 0.6rem;
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border-radius: var(--border-radius-xs);
    font-size: 0.8rem;
}

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

/* Uploaded Files Section & Table */
.uploaded-files-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: 0 4px 20px var(--shadow-color);
}

.section-subhead {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.subhead-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.subhead-badge {
    background: rgba(59, 130, 246, 0.15);
    color: var(--primary-500);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
}

.files-search-box {
    position: relative;
    width: 260px;
}

.files-search-box input {
    width: 100%;
    padding: 0.5rem 0.75rem 0.5rem 2rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.85rem;
    outline: none;
}

.files-search-box .search-icon {
    position: absolute;
    left: 0.65rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.files-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.files-table th {
    text-align: left;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

.files-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}

.files-table tr:hover td {
    background: rgba(59, 130, 246, 0.03);
}

.file-type-chip {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 6px;
    text-transform: uppercase;
}

.file-type-pdf { background: rgba(239, 68, 68, 0.15); color: #ef4444; }
.file-type-doc, .file-type-docx { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.file-type-ppt, .file-type-pptx { background: rgba(249, 115, 22, 0.15); color: #f97316; }
.file-type-xls, .file-type-xlsx { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.file-type-zip, .file-type-rar { background: rgba(139, 92, 246, 0.15); color: #8b5cf6; }

.empty-files-placeholder {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-files-placeholder .empty-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

/* In-Modal File Attachment Card */
.modal-file-attach-box {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
}

.modal-file-attach-box h4 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-file-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.modal-file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0.85rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xs);
    gap: 0.75rem;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 10001;
}

.toast {
    background: var(--bg-sidebar);
    color: white;
    padding: 0.85rem 1.25rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-left: 4px solid var(--primary-500);
    animation: toastSlideIn 0.3s ease;
}

.toast.toast-success { border-left-color: var(--success); }
.toast.toast-danger { border-left-color: var(--danger); }
.toast.toast-warning { border-left-color: var(--warning); }

@keyframes toastSlideIn {
    from { transform: translateX(50px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

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

.file-meta-pill {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===================================
   ADMIN AUTHENTICATION & ACCESS CONTROL
   =================================== */

/* Sidebar Admin Area */
.sidebar-admin-area {
    margin-bottom: 0.75rem;
}

.sidebar-admin-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 0.85rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px dashed rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-xs);
    color: var(--text-sidebar);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sidebar-admin-btn:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--primary-400);
    color: #fff;
    transform: translateY(-1px);
}

.sidebar-admin-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem 0.85rem;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(236, 72, 153, 0.15));
    border: 1px solid rgba(245, 158, 11, 0.35);
    border-radius: var(--border-radius-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sidebar-admin-card:hover {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.22), rgba(236, 72, 153, 0.22));
    border-color: var(--warning);
}

.sidebar-admin-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    overflow: hidden;
}

.sidebar-admin-icon {
    font-size: 1.15rem;
}

.sidebar-admin-meta {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-admin-title {
    font-size: 0.65rem;
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--warning);
}

.sidebar-admin-name {
    font-size: 0.825rem;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-logout-mini {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    border-radius: 6px;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-logout-mini:hover {
    background: #ef4444;
    color: #fff;
}

/* Mobile Header Admin Button */
.btn-mobile-admin {
    margin-left: auto;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    padding: 0.35rem 0.65rem;
    font-size: 1rem;
    cursor: pointer;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* File Hub Header & Role Pill */
.file-storage-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.admin-role-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.45rem 0.85rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.admin-role-pill:hover {
    border-color: var(--primary-500);
    transform: translateY(-1px);
}

.admin-role-pill.is-admin {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(236, 72, 153, 0.12));
    border-color: var(--warning);
    color: #d97706;
}

/* Guest Locked Banner */
.admin-locked-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.75rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px var(--shadow-color);
    position: relative;
    overflow: hidden;
}

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

.locked-card-inner {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.locked-badge-wrap {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    flex-shrink: 0;
}

.locked-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.locked-content p {
    font-size: 0.925rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.locked-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.locked-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Admin Active Strip inside Upload Card */
.admin-active-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.12), rgba(59, 130, 246, 0.12));
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--border-radius-xs);
    padding: 0.65rem 1rem;
    margin-bottom: 1.25rem;
}

.admin-active-strip .strip-left {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.admin-active-strip .strip-icon {
    font-size: 1.25rem;
}

.btn-logout-tiny {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 6px;
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-logout-tiny:hover {
    background: var(--danger);
    color: #fff;
}

/* Student empty slot badge */
.student-slot-empty-pill {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 0.3rem 0.65rem;
    background: rgba(148, 163, 184, 0.1);
    border-radius: 12px;
    font-weight: 500;
}

/* Admin Auth & Management Modal */
.admin-modal-card {
    max-width: 480px;
    width: 90%;
    padding: 2.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    text-align: center;
}

.admin-modal-icon-wrap {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
}

.admin-icon-glow {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.12);
    border: 2px solid rgba(59, 130, 246, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: 0 0 25px rgba(59, 130, 246, 0.2);
    animation: iconPulse 2s infinite ease-in-out;
}

.admin-icon-glow.crown {
    background: rgba(245, 158, 11, 0.12);
    border-color: rgba(245, 158, 11, 0.3);
    box-shadow: 0 0 25px rgba(245, 158, 11, 0.25);
}

@keyframes iconPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.06); }
}

.admin-badge-tag {
    display: inline-block;
    padding: 3px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--warning), var(--accent-pink));
    color: white;
    border-radius: 20px;
    margin-bottom: 0.5rem;
}

.admin-modal-title {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.admin-modal-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1.5rem;
}

.admin-form-group {
    text-align: left;
    margin-bottom: 1rem;
}

.admin-form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--text-primary);
}

.admin-pass-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.admin-pass-wrap .text-input {
    width: 100%;
    padding: 0.65rem 2.5rem 0.65rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xs);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

.admin-pass-wrap .text-input:focus {
    border-color: var(--primary-500);
}

.btn-pass-toggle {
    position: absolute;
    right: 0.75rem;
    background: none;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.btn-pass-toggle:hover {
    opacity: 1;
}

.admin-error-msg {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--danger);
    font-weight: 600;
}

.admin-pass-hint {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    text-align: left;
    padding: 0.65rem 0.85rem;
    background: rgba(59, 130, 246, 0.06);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-radius: var(--border-radius-xs);
    font-size: 0.775rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.admin-pass-hint code {
    background: rgba(0, 0, 0, 0.08);
    padding: 1px 5px;
    border-radius: 4px;
    font-weight: 700;
    color: var(--primary-600);
}

.admin-modal-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
}

.admin-stats-summary {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.admin-stat-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xs);
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.admin-stat-item .stat-count {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary-500);
}

.admin-stat-item .stat-name {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.admin-change-pass-section {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
    margin-top: 0.75rem;
}

.btn-toggle-pass-box {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0;
    cursor: pointer;
}

.btn-toggle-pass-box:hover {
    color: var(--primary-500);
}

.change-pass-box {
    margin-top: 0.75rem;
    text-align: left;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xs);
    padding: 1rem;
}

/* ===================================
   CAMERA AI EMOTION SCANNER STYLES
   =================================== */
.camera-detection-card {
    padding: 2rem;
}

.camera-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.camera-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.45rem 0.9rem;
    border-radius: 20px;
    background: rgba(148, 163, 184, 0.12);
    border: 1px solid var(--border-color);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.camera-status-badge .status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--gray-400);
}

.camera-status-badge.active {
    background: rgba(16, 185, 129, 0.12);
    border-color: rgba(16, 185, 129, 0.35);
    color: var(--success);
}

.camera-status-badge.active .status-dot {
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
    animation: statusPulse 1.5s infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.85); }
}

.camera-main-grid {
    display: grid;
    grid-template-columns: 1.25fr 1fr;
    gap: 2rem;
    align-items: flex-start;
}

@media (max-width: 992px) {
    .camera-main-grid {
        grid-template-columns: 1fr;
    }
}

/* Camera Viewport */
.camera-viewport-wrap {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.camera-screen {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    max-height: 440px;
    background: #000;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 2px solid rgba(59, 130, 246, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.camera-screen video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);
    display: block;
    z-index: 1;
    background: #000;
}

.camera-screen canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
    /* Do not mirror canvas so UI text renders in normal readable direction */
}

/* Placeholder */
.camera-placeholder {
    position: absolute;
    inset: 0;
    background: linear-gradient(145deg, #0f172a, #1e293b);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    color: white;
    z-index: 5;
    transition: opacity 0.3s ease;
}

.camera-placeholder.hidden {
    opacity: 0;
    pointer-events: none;
}

.placeholder-icon-wrap {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.camera-big-icon {
    font-size: 3rem;
    z-index: 2;
}

.camera-radar-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid rgba(59, 130, 246, 0.5);
    animation: radarPulse 2s infinite;
}

@keyframes radarPulse {
    0% { transform: scale(0.8); opacity: 1; }
    100% { transform: scale(1.6); opacity: 0; }
}

.camera-placeholder h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.camera-placeholder p {
    font-size: 0.875rem;
    color: var(--gray-400);
    max-width: 380px;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.btn-camera-start {
    padding: 0.75rem 1.75rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 24px;
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

/* Scanning HUD */
.camera-scan-hud {
    position: absolute;
    inset: 15px;
    pointer-events: none;
    z-index: 4;
}

.scan-laser-line {
    position: absolute;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #06b6d4, #3b82f6, transparent);
    box-shadow: 0 0 15px #06b6d4;
    animation: scanLaser 2.2s infinite ease-in-out;
}

@keyframes scanLaser {
    0% { top: 0%; opacity: 0.2; }
    50% { opacity: 1; }
    100% { top: 100%; opacity: 0.2; }
}

.hud-corner {
    position: absolute;
    width: 24px;
    height: 24px;
    border: 2px solid #06b6d4;
}

.hud-corner.top-left { top: 0; left: 0; border-right: none; border-bottom: none; }
.hud-corner.top-right { top: 0; right: 0; border-left: none; border-bottom: none; }
.hud-corner.bottom-left { bottom: 0; left: 0; border-right: none; border-top: none; }
.hud-corner.bottom-right { bottom: 0; right: 0; border-left: none; border-top: none; }

.hud-data-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(6, 182, 212, 0.4);
    color: #06b6d4;
    font-family: monospace;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}

.camera-toolbar {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.camera-privacy-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* Telemetry Panel */
.camera-telemetry-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    box-shadow: 0 4px 20px var(--shadow-color);
}

.telemetry-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.telemetry-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
}

.telemetry-chip {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.15);
    color: var(--primary-500);
}

/* Dominant Emotion Card */
.dominant-emotion-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.dominant-emoji {
    font-size: 2.75rem;
    flex-shrink: 0;
    animation: gentleBounce 2s infinite ease-in-out;
}

@keyframes gentleBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

.dominant-info {
    overflow: hidden;
}

.dominant-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.dominant-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0.15rem 0;
}

.dominant-match {
    font-size: 0.825rem;
    color: var(--text-secondary);
}

/* Emotion Bars */
.emotion-bars-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.emotion-bar-item .bar-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.825rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.emotion-bar-item .bar-track {
    height: 8px;
    background: rgba(148, 163, 184, 0.15);
    border-radius: 6px;
    overflow: hidden;
}

.emotion-bar-item .bar-fill {
    height: 100%;
    border-radius: 6px;
    transition: width 0.4s ease;
}

.bar-fill.joy-fill { background: linear-gradient(90deg, #f59e0b, #10b981); }
.bar-fill.focus-fill { background: linear-gradient(90deg, #06b6d4, #3b82f6); }
.bar-fill.calm-fill { background: linear-gradient(90deg, #10b981, #14b8a6); }
.bar-fill.stress-fill { background: linear-gradient(90deg, #f97316, #ef4444); }

/* REI Meter Box */
.rei-meter-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.85rem 1rem;
}

.rei-score-circle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(16, 185, 129, 0.12));
    border: 2px solid var(--primary-500);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.rei-score-circle .score-number {
    font-size: 1.15rem;
    font-weight: 800;
    line-height: 1;
    color: var(--primary-600);
}

.rei-score-circle .score-max {
    font-size: 0.6rem;
    color: var(--text-muted);
}

.rei-score-text h5 {
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
}

.rei-score-text p {
    font-size: 0.775rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Recommendation Box */
.camera-recommendation-box {
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-left: 4px solid var(--primary-500);
    border-radius: var(--border-radius-xs);
    padding: 0.85rem 1rem;
}

.camera-recommendation-box .rec-title {
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
    color: var(--primary-600);
}

.camera-recommendation-box p {
    font-size: 0.825rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* =============================================================================
   CAMERA SNAPSHOT MODAL STYLES
   ============================================================================= */
.camera-snapshot-modal-card {
    max-width: 820px;
    width: 95%;
    padding: 1.75rem;
    border-radius: 20px;
    background: var(--card-bg, #ffffff);
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
}

.camera-modal-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.camera-modal-icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(168, 85, 247, 0.2));
    border: 1px solid rgba(99, 102, 241, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    flex-shrink: 0;
}

.camera-modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
}

.camera-modal-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

.camera-snapshot-grid {
    display: grid;
    grid-template-columns: 290px 1fr;
    gap: 1.5rem;
    margin: 1.5rem 0;
    align-items: stretch;
}

.camera-snapshot-preview-box {
    position: relative;
    border-radius: 14px;
    overflow: hidden;
    background: #0f172a;
    border: 2px solid var(--border-color);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
}

.snapshot-preview-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.snapshot-face-tag {
    position: absolute;
    bottom: 10px;
    left: 10px;
    right: 10px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(0, 240, 255, 0.4);
    border-left: 3px solid #00f0ff;
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 0.7rem;
    color: #00f0ff;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.camera-snapshot-report {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    justify-content: space-between;
}

.snapshot-score-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(168, 85, 247, 0.12));
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 12px;
}

.snapshot-banner-metric .banner-lbl {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 0.2rem;
    font-weight: 600;
}

.snapshot-banner-metric .banner-score {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--primary-600);
    line-height: 1;
}

.snapshot-banner-metric .banner-score small {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.snapshot-banner-badge {
    background: linear-gradient(135deg, #10b981, #059669);
    color: #ffffff;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 30px;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.snapshot-details-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.snap-detail-row {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.snap-detail-lbl {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.snap-detail-row b {
    font-size: 1.05rem;
    color: var(--text-primary);
}

.snapshot-analysis-text-box {
    background: var(--bg-secondary);
    border-left: 4px solid var(--primary-500);
    border-radius: 10px;
    padding: 0.9rem 1.1rem;
}

.analysis-box-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary-600);
    margin-bottom: 0.4rem;
}

.snap-rec-content {
    font-size: 0.84rem;
    line-height: 1.55;
    color: var(--text-primary);
    margin: 0;
}

.camera-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.85rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    .camera-snapshot-grid {
        grid-template-columns: 1fr;
    }
    .snapshot-details-list {
        grid-template-columns: 1fr;
    }
    .camera-modal-actions {
        flex-direction: column;
    }
    .camera-modal-actions .btn {
        width: 100%;
        justify-content: center;
    }
}