/* ============================================
   DIJITAL YETKINLIK AKADEMISI — PREMIUM STYLES
   ============================================ */

:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #111128;
    --bg-card: rgba(20, 20, 50, 0.8);
    --bg-glass: rgba(255,255,255,0.04);
    --border-glass: rgba(255,255,255,0.08);
    --text-primary: #f0f0ff;
    --text-secondary: #a0a0c0;
    --text-muted: #6a6a8a;
    --accent-1: #6c5ce7;
    --accent-2: #a855f7;
    --accent-3: #06b6d4;
    --accent-4: #10b981;
    --accent-5: #f59e0b;
    --accent-6: #ef4444;
    --gradient-primary: linear-gradient(135deg, #6c5ce7, #a855f7);
    --gradient-secondary: linear-gradient(135deg, #06b6d4, #10b981);
    --gradient-warm: linear-gradient(135deg, #f59e0b, #ef4444);
    --gradient-hero: linear-gradient(135deg, #6c5ce7 0%, #a855f7 30%, #06b6d4 70%, #10b981 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 30px rgba(108,92,231,0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-1); border-radius: 3px; }

/* Background Particles */
.bg-particles {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none; z-index: 0; overflow: hidden;
}
.bg-particles::before, .bg-particles::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    animation: floatBg 20s ease-in-out infinite alternate;
}
.bg-particles::before {
    width: 600px; height: 600px;
    background: var(--accent-1);
    top: -200px; left: -200px;
}
.bg-particles::after {
    width: 500px; height: 500px;
    background: var(--accent-3);
    bottom: -150px; right: -150px;
    animation-delay: -10s;
}
@keyframes floatBg {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(100px, 50px) scale(1.2); }
}

/* ============ HEADER ============ */
.header {
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(10,10,26,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    transition: var(--transition);
}
.header-inner {
    max-width: 1400px; margin: 0 auto;
    padding: 0 24px; height: 70px;
    display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 12px; cursor: pointer; }
.logo-icon {
    width: 44px; height: 44px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; color: white;
    box-shadow: var(--shadow-glow);
}
.logo-title { font-weight: 700; font-size: 18px; display: block; }
.logo-subtitle { font-size: 10px; letter-spacing: 4px; color: var(--accent-2); font-weight: 600; }

.nav { display: flex; gap: 4px; }
.nav-btn {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 16px; border: none;
    background: transparent; color: var(--text-secondary);
    font-family: var(--font); font-size: 14px; font-weight: 500;
    border-radius: var(--radius-sm); cursor: pointer;
    transition: var(--transition);
}
.nav-btn:hover { background: var(--bg-glass); color: var(--text-primary); }
.nav-btn.active { background: rgba(108,92,231,0.15); color: var(--accent-2); }

.mobile-menu-btn {
    display: none; background: none; border: none;
    color: var(--text-primary); font-size: 24px; cursor: pointer;
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed; top: 70px; left: 0; right: 0;
    background: rgba(10,10,26,0.95); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    padding: 16px; z-index: 999;
    max-height: 70vh; overflow-y: auto;
}
.mobile-menu.show { display: block; }
.mobile-menu button {
    display: block; width: 100%; text-align: left;
    padding: 12px 16px; border: none; background: none;
    color: var(--text-secondary); font-family: var(--font);
    font-size: 15px; border-radius: var(--radius-sm);
    cursor: pointer; transition: var(--transition);
}
.mobile-menu button:hover { background: var(--bg-glass); color: var(--text-primary); }
.mobile-menu-divider { height: 1px; background: var(--border-glass); margin: 8px 0; }

/* ============ MAIN ============ */
.main {
    max-width: 1400px; margin: 0 auto;
    padding: 90px 24px 40px;
    position: relative; z-index: 1;
    min-height: calc(100vh - 130px);
}
.hidden { display: none !important; }

/* ============ HERO ============ */
.hero {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 60px; align-items: center;
    padding: 40px 0 60px;
}
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 16px; border-radius: 50px;
    background: rgba(108,92,231,0.15); border: 1px solid rgba(108,92,231,0.3);
    color: var(--accent-2); font-size: 13px; font-weight: 600;
    margin-bottom: 20px;
}
.hero-title {
    font-size: 52px; font-weight: 900; line-height: 1.15;
    margin-bottom: 20px;
}
.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 17px; color: var(--text-secondary);
    line-height: 1.8; margin-bottom: 32px; max-width: 540px;
}
.hero-stats {
    display: flex; gap: 32px; margin-bottom: 36px;
}
.stat { text-align: center; }
.stat-number {
    font-size: 36px; font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-label { font-size: 13px; color: var(--text-muted); font-weight: 500; }

.hero-cta {
    padding: 14px 36px; border: none;
    background: var(--gradient-primary);
    color: white; font-family: var(--font);
    font-size: 16px; font-weight: 600;
    border-radius: var(--radius-xl); cursor: pointer;
    box-shadow: var(--shadow-glow);
    transition: var(--transition);
    display: inline-flex; align-items: center; gap: 10px;
}
.hero-cta:hover { transform: translateY(-2px); box-shadow: 0 0 50px rgba(108,92,231,0.5); }

.hero-visual {
    position: relative; height: 400px;
    display: flex; align-items: center; justify-content: center;
}
.hero-card {
    position: absolute;
    padding: 20px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    display: flex; align-items: center; gap: 12px;
    font-weight: 600; font-size: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    animation: cardFloat 6s ease-in-out infinite;
}
.hero-card:hover { transform: scale(1.05) !important; }
.hero-card i { font-size: 24px; }
.hero-card-1 { top: 10%; left: 10%; animation-delay: 0s; }
.hero-card-1 i { color: var(--accent-1); }
.hero-card-2 { top: 5%; right: 5%; animation-delay: -1.5s; }
.hero-card-2 i { color: var(--accent-5); }
.hero-card-3 { bottom: 15%; left: 5%; animation-delay: -3s; }
.hero-card-3 i { color: var(--accent-4); }
.hero-card-4 { bottom: 10%; right: 10%; animation-delay: -4.5s; }
.hero-card-4 i { color: var(--accent-3); }

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

/* ============ SECTION HEADERS ============ */
.section-header {
    text-align: center; margin-bottom: 40px;
}
.section-header h2 {
    font-size: 32px; font-weight: 800; margin-bottom: 8px;
}
.section-header h2 i { margin-right: 10px; color: var(--accent-2); }
.section-header p { color: var(--text-secondary); font-size: 16px; }

/* ============ WEEKS GRID ============ */
.weeks-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px; margin-bottom: 60px;
}
.week-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 28px;
    cursor: pointer;
    transition: var(--transition);
    position: relative; overflow: hidden;
}
.week-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--card-accent, var(--gradient-primary));
    opacity: 0; transition: var(--transition);
}
.week-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(108,92,231,0.3); }
.week-card:hover::before { opacity: 1; }

.week-card-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 16px;
}
.week-card-number {
    font-size: 13px; font-weight: 700;
    padding: 4px 12px; border-radius: 50px;
    background: rgba(108,92,231,0.15); color: var(--accent-2);
}
.week-card-hours {
    font-size: 12px; color: var(--text-muted);
    display: flex; align-items: center; gap: 4px;
}
.week-card-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; margin-bottom: 16px;
}
.week-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.week-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

.week-card-progress {
    margin-top: 16px; display: flex; align-items: center; gap: 10px;
}
.progress-bar {
    flex: 1; height: 4px; background: rgba(255,255,255,0.08);
    border-radius: 2px; overflow: hidden;
}
.progress-bar-fill {
    height: 100%; border-radius: 2px;
    background: var(--gradient-primary); transition: width 0.5s ease;
}
.progress-text { font-size: 12px; color: var(--text-muted); font-weight: 600; }

/* ============ FEATURES ============ */
.features-section { margin-bottom: 60px; }
.features-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}
.feature-card {
    text-align: center; padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-icon {
    width: 60px; height: 60px; margin: 0 auto 16px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; color: white;
}
.feature-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); }

/* ============ WEEK SECTION ============ */
.week-header {
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    margin-bottom: 24px;
    position: relative; overflow: hidden;
}
.week-header::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: var(--gradient-primary);
}
.week-header .back-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 16px; border: 1px solid var(--border-glass);
    background: var(--bg-glass); color: var(--text-secondary);
    border-radius: var(--radius-sm); cursor: pointer;
    font-family: var(--font); font-size: 13px;
    transition: var(--transition); margin-bottom: 20px;
}
.week-header .back-btn:hover { background: rgba(108,92,231,0.15); color: var(--accent-2); border-color: rgba(108,92,231,0.3); }
.week-header h1 { font-size: 32px; font-weight: 800; margin-bottom: 8px; }
.week-header .week-meta {
    display: flex; gap: 20px; flex-wrap: wrap;
    color: var(--text-secondary); font-size: 14px;
}
.week-header .week-meta span { display: flex; align-items: center; gap: 6px; }

.week-nav {
    display: flex; gap: 8px; overflow-x: auto;
    padding-bottom: 8px; margin-bottom: 24px;
}
.week-nav-btn {
    padding: 10px 20px; white-space: nowrap;
    border: 1px solid var(--border-glass);
    background: var(--bg-card); color: var(--text-secondary);
    border-radius: var(--radius-sm); cursor: pointer;
    font-family: var(--font); font-size: 14px; font-weight: 500;
    transition: var(--transition);
    display: flex; align-items: center; gap: 8px;
}
.week-nav-btn:hover { border-color: rgba(108,92,231,0.3); color: var(--text-primary); }
.week-nav-btn.active { background: rgba(108,92,231,0.15); border-color: var(--accent-1); color: var(--accent-2); }
.week-nav-btn.completed { border-color: rgba(16,185,129,0.3); }
.week-nav-btn.completed i { color: var(--accent-4); }

/* ============ LESSON SECTION ============ */
.lesson-header {
    padding: 32px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    margin-bottom: 24px;
}
.lesson-header .back-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 16px; border: 1px solid var(--border-glass);
    background: var(--bg-glass); color: var(--text-secondary);
    border-radius: var(--radius-sm); cursor: pointer;
    font-family: var(--font); font-size: 13px;
    transition: var(--transition); margin-bottom: 16px;
}
.lesson-header .back-btn:hover { background: rgba(108,92,231,0.15); color: var(--accent-2); }
.lesson-header h1 { font-size: 28px; font-weight: 800; margin-bottom: 8px; }
.lesson-header p { color: var(--text-secondary); font-size: 15px; }

.lesson-body {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 40px;
    margin-bottom: 24px;
}

/* Lesson Content Styles */
.lesson-content h2 {
    font-size: 24px; font-weight: 700;
    margin: 32px 0 16px; padding-bottom: 8px;
    border-bottom: 2px solid rgba(108,92,231,0.2);
}
.lesson-content h2:first-child { margin-top: 0; }
.lesson-content h3 {
    font-size: 20px; font-weight: 600;
    margin: 24px 0 12px; color: var(--accent-2);
}
.lesson-content h4 { font-size: 17px; font-weight: 600; margin: 20px 0 10px; }
.lesson-content p { margin-bottom: 14px; color: var(--text-secondary); line-height: 1.8; font-size: 15px; }
.lesson-content ul, .lesson-content ol {
    margin: 12px 0 16px 24px; color: var(--text-secondary);
}
.lesson-content li { margin-bottom: 8px; line-height: 1.7; }
.lesson-content strong { color: var(--text-primary); }

/* Info Boxes */
.info-box {
    padding: 20px 24px; margin: 20px 0;
    border-radius: var(--radius-md);
    border-left: 4px solid;
}
.info-box.tip { background: rgba(16,185,129,0.08); border-color: var(--accent-4); }
.info-box.warning { background: rgba(245,158,11,0.08); border-color: var(--accent-5); }
.info-box.important { background: rgba(108,92,231,0.08); border-color: var(--accent-1); }
.info-box.danger { background: rgba(239,68,68,0.08); border-color: var(--accent-6); }
.info-box-title { font-weight: 700; margin-bottom: 6px; font-size: 14px; display: flex; align-items: center; gap: 8px; }
.info-box.tip .info-box-title { color: var(--accent-4); }
.info-box.warning .info-box-title { color: var(--accent-5); }
.info-box.important .info-box-title { color: var(--accent-1); }
.info-box.danger .info-box-title { color: var(--accent-6); }
.info-box p { margin: 0; font-size: 14px; }

/* Video Cards */
.video-card {
    background: rgba(108,92,231,0.08);
    border: 1px solid rgba(108,92,231,0.2);
    border-radius: var(--radius-md);
    padding: 20px; margin: 20px 0;
    cursor: pointer; transition: var(--transition);
    display: flex; align-items: center; gap: 16px;
}
.video-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--accent-1); }
.video-play-icon {
    width: 50px; height: 50px; min-width: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 18px;
}
.video-card-info h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.video-card-info p { font-size: 13px; color: var(--text-muted); margin: 0; }

/* YouTube Video Embed */
.video-embed {
    margin: 24px 0;
    background: var(--bg-card);
    border: 1px solid rgba(108,92,231,0.2);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.video-embed h4 {
    padding: 16px 20px 12px;
    font-size: 16px; font-weight: 700;
    color: var(--text-primary);
    display: flex; align-items: center; gap: 8px;
    margin: 0;
}
.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0; overflow: hidden;
}
.video-container iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    border: none;
}
.video-link {
    padding: 10px 20px 14px;
    font-size: 13px;
    margin: 0;
}
.video-link a {
    color: var(--accent-2);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}
.video-link a:hover { color: var(--accent-3); text-decoration: underline; }

/* Interactive Elements */
.interactive-box {
    background: rgba(6,182,212,0.06);
    border: 1px solid rgba(6,182,212,0.2);
    border-radius: var(--radius-lg);
    padding: 28px; margin: 24px 0;
}
.interactive-box h4 {
    font-size: 16px; font-weight: 700;
    color: var(--accent-3); margin-bottom: 16px;
    display: flex; align-items: center; gap: 8px;
}
.interactive-box h4 i { font-size: 18px; }

/* CV Example */
.cv-example {
    background: white; color: #222;
    border-radius: var(--radius-md);
    padding: 32px; margin: 20px 0;
    font-family: 'Inter', sans-serif;
    box-shadow: var(--shadow-lg);
    max-width: 700px;
}
.cv-example h2 { color: #2c3e50; border-bottom: 2px solid #6c5ce7; padding-bottom: 8px; font-size: 22px; margin: 0 0 4px; }
.cv-example h3 { color: #6c5ce7; font-size: 16px; margin: 16px 0 8px; border-bottom: 1px solid #eee; padding-bottom: 4px; }
.cv-example p { color: #555; font-size: 13px; margin: 4px 0; line-height: 1.6; }
.cv-example ul { margin: 8px 0 8px 20px; color: #555; }
.cv-example li { font-size: 13px; margin-bottom: 4px; }
.cv-contact { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12px; color: #777; margin-bottom: 12px; }
.cv-contact span { display: flex; align-items: center; gap: 4px; }

/* Simulated App */
.sim-window {
    background: #1e1e2e; border: 1px solid #333;
    border-radius: var(--radius-md); overflow: hidden;
    margin: 20px 0; box-shadow: var(--shadow-lg);
}
.sim-titlebar {
    background: #2d2d3f; padding: 8px 16px;
    display: flex; align-items: center; gap: 8px;
    font-size: 13px; color: #aaa;
}
.sim-dot { width: 12px; height: 12px; border-radius: 50%; }
.sim-dot.red { background: #ff5f56; }
.sim-dot.yellow { background: #ffbd2e; }
.sim-dot.green { background: #27c93f; }
.sim-titlebar span { margin-left: 8px; }
.sim-toolbar {
    background: #252536; padding: 6px 12px;
    display: flex; gap: 4px; border-bottom: 1px solid #333;
}
.sim-tool-btn {
    padding: 4px 10px; background: none; border: none;
    color: #888; font-size: 12px; cursor: pointer;
    border-radius: 4px; transition: var(--transition);
    font-family: var(--font);
}
.sim-tool-btn:hover { background: rgba(108,92,231,0.2); color: #fff; }
.sim-body { padding: 20px; min-height: 200px; }
.sim-body p { color: #ccc; font-size: 14px; }
.sim-body table { width: 100%; border-collapse: collapse; }
.sim-body table th, .sim-body table td {
    border: 1px solid #444; padding: 8px 12px;
    text-align: left; font-size: 13px; color: #ccc;
}
.sim-body table th { background: rgba(108,92,231,0.15); color: var(--accent-2); font-weight: 600; }
.sim-body .formula-bar {
    background: #2a2a3e; padding: 6px 12px;
    border: 1px solid #444; border-radius: 4px;
    margin-bottom: 12px; font-family: var(--font-mono);
    font-size: 13px; color: var(--accent-4);
}

/* Drag & Drop */
.drag-container {
    display: flex; gap: 20px; flex-wrap: wrap;
    margin: 16px 0;
}
.drag-zone {
    flex: 1; min-width: 200px; min-height: 120px;
    border: 2px dashed rgba(108,92,231,0.3);
    border-radius: var(--radius-md);
    padding: 16px; text-align: center;
    transition: var(--transition);
}
.drag-zone.over { border-color: var(--accent-1); background: rgba(108,92,231,0.1); }
.drag-zone h5 { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }
.drag-item {
    display: inline-block; padding: 8px 16px;
    background: rgba(108,92,231,0.15);
    border: 1px solid rgba(108,92,231,0.3);
    border-radius: var(--radius-sm);
    font-size: 13px; font-weight: 500;
    cursor: grab; margin: 4px;
    transition: var(--transition);
    color: var(--text-primary);
}
.drag-item:active { cursor: grabbing; }
.drag-item.correct { background: rgba(16,185,129,0.2); border-color: var(--accent-4); }
.drag-item.incorrect { background: rgba(239,68,68,0.2); border-color: var(--accent-6); }

/* ============ QUIZ SECTION ============ */
.quiz-header {
    padding: 32px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    margin-bottom: 24px;
}
.quiz-header .back-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 16px; border: 1px solid var(--border-glass);
    background: var(--bg-glass); color: var(--text-secondary);
    border-radius: var(--radius-sm); cursor: pointer;
    font-family: var(--font); font-size: 13px;
    transition: var(--transition); margin-bottom: 16px;
}
.quiz-header .back-btn:hover { background: rgba(108,92,231,0.15); color: var(--accent-2); }
.quiz-header h1 { font-size: 28px; font-weight: 800; margin-bottom: 8px; }
.quiz-header p { color: var(--text-secondary); font-size: 15px; }
.quiz-progress-bar {
    margin-top: 16px; height: 6px;
    background: rgba(255,255,255,0.08);
    border-radius: 3px; overflow: hidden;
}
.quiz-progress-fill {
    height: 100%; background: var(--gradient-primary);
    border-radius: 3px; transition: width 0.5s ease;
}

.quiz-body { margin-bottom: 24px; }
.quiz-question {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 32px; margin-bottom: 20px;
}
.quiz-question-number {
    font-size: 13px; font-weight: 700;
    color: var(--accent-2); margin-bottom: 12px;
}
.quiz-question-text {
    font-size: 17px; font-weight: 600;
    margin-bottom: 20px; line-height: 1.6;
}
.quiz-options { display: flex; flex-direction: column; gap: 10px; }
.quiz-option {
    padding: 14px 20px;
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    border-radius: var(--radius-md);
    cursor: pointer; transition: var(--transition);
    font-size: 15px; display: flex; align-items: center; gap: 12px;
}
.quiz-option:hover { border-color: rgba(108,92,231,0.3); background: rgba(108,92,231,0.08); }
.quiz-option.selected { border-color: var(--accent-1); background: rgba(108,92,231,0.15); }
.quiz-option.correct { border-color: var(--accent-4); background: rgba(16,185,129,0.15); }
.quiz-option.incorrect { border-color: var(--accent-6); background: rgba(239,68,68,0.15); }
.quiz-option-letter {
    width: 32px; height: 32px; min-width: 32px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 14px;
}
.quiz-option.selected .quiz-option-letter { background: var(--gradient-primary); color: white; }
.quiz-option.correct .quiz-option-letter { background: var(--accent-4); color: white; }
.quiz-option.incorrect .quiz-option-letter { background: var(--accent-6); color: white; }

.quiz-explanation {
    margin-top: 12px; padding: 16px;
    background: rgba(16,185,129,0.08);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent-4);
    font-size: 14px; color: var(--text-secondary);
    display: none;
}
.quiz-explanation.show { display: block; }

.quiz-footer {
    display: flex; justify-content: center; gap: 12px;
}
.quiz-btn {
    padding: 12px 32px; border: none;
    background: var(--gradient-primary);
    color: white; font-family: var(--font);
    font-size: 15px; font-weight: 600;
    border-radius: var(--radius-xl); cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; gap: 8px;
}
.quiz-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.quiz-btn.secondary {
    background: var(--bg-card); border: 1px solid var(--border-glass);
    color: var(--text-secondary);
}
.quiz-btn.secondary:hover { border-color: rgba(108,92,231,0.3); color: var(--text-primary); }

/* Quiz Results */
.quiz-results {
    text-align: center; padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
}
.quiz-score-circle {
    width: 140px; height: 140px; margin: 0 auto 24px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 36px; font-weight: 900;
}
.quiz-score-circle.pass { background: rgba(16,185,129,0.15); border: 3px solid var(--accent-4); color: var(--accent-4); }
.quiz-score-circle.fail { background: rgba(239,68,68,0.15); border: 3px solid var(--accent-6); color: var(--accent-6); }
.quiz-results h2 { font-size: 24px; margin-bottom: 8px; }
.quiz-results p { color: var(--text-secondary); margin-bottom: 24px; }
.quiz-results-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* ============ PROGRESS SECTION ============ */
.progress-overview {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px; margin-bottom: 32px;
}
.progress-stat-card {
    padding: 24px; text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
}
.progress-stat-card .stat-icon {
    width: 50px; height: 50px; margin: 0 auto 12px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; color: white;
}
.progress-stat-card h3 { font-size: 28px; font-weight: 800; margin-bottom: 4px; }
.progress-stat-card p { font-size: 13px; color: var(--text-muted); }

.progress-details { display: flex; flex-direction: column; gap: 12px; }
.progress-week-row {
    display: flex; align-items: center; gap: 16px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    transition: var(--transition);
}
.progress-week-row:hover { border-color: rgba(108,92,231,0.3); }
.progress-week-row .pw-num {
    width: 36px; height: 36px; min-width: 36px;
    background: rgba(108,92,231,0.15);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 14px; color: var(--accent-2);
}
.progress-week-row .pw-name { flex: 1; font-weight: 600; font-size: 15px; }
.progress-week-row .pw-bar { flex: 2; }
.progress-week-row .pw-score {
    font-weight: 700; font-size: 14px; min-width: 50px; text-align: right;
}

/* ============ CERTIFICATE ============ */
.certificate-card {
    max-width: 800px; margin: 0 auto;
    background: linear-gradient(135deg, #1a1a3e, #2a1a4e);
    border: 2px solid rgba(168,85,247,0.4);
    border-radius: var(--radius-xl);
    padding: 60px; text-align: center;
    position: relative; overflow: hidden;
}
.certificate-card::before {
    content: '';
    position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(108,92,231,0.1), transparent);
    animation: certificateRotate 8s linear infinite;
}
@keyframes certificateRotate { 100% { transform: rotate(360deg); } }
.certificate-card > * { position: relative; z-index: 1; }
.certificate-card h1 { font-size: 32px; font-weight: 900; margin-bottom: 8px; }
.certificate-card h2 { font-size: 18px; color: var(--accent-2); margin-bottom: 24px; }
.certificate-card .cert-name {
    font-size: 36px; font-weight: 900;
    background: var(--gradient-hero);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
}
.certificate-card p { color: var(--text-secondary); margin-bottom: 8px; }
.cert-seal {
    width: 80px; height: 80px; margin: 24px auto;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 32px; color: white;
    box-shadow: var(--shadow-glow);
}

/* ============ VIDEO MODAL ============ */
.video-modal {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.85);
    z-index: 2000;
    display: flex; align-items: center; justify-content: center;
    padding: 24px;
}
.video-modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    width: 100%; max-width: 900px; max-height: 90vh;
    overflow-y: auto; position: relative;
}
.video-modal-close {
    position: absolute; top: 16px; right: 16px;
    background: rgba(255,255,255,0.1); border: none;
    width: 36px; height: 36px; border-radius: 50%;
    color: white; font-size: 16px; cursor: pointer;
    z-index: 2; transition: var(--transition);
}
.video-modal-close:hover { background: rgba(239,68,68,0.3); }
.video-modal-body { padding: 40px; }
.video-modal-body h2 { font-size: 24px; font-weight: 700; margin-bottom: 16px; }
.video-modal-body .video-steps { display: flex; flex-direction: column; gap: 16px; }
.video-step {
    display: flex; gap: 16px;
    padding: 16px; background: var(--bg-glass);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-glass);
}
.video-step-num {
    width: 36px; height: 36px; min-width: 36px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 14px; color: white;
}
.video-step-content h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.video-step-content p { font-size: 13px; color: var(--text-secondary); margin: 0; }
.video-step-img {
    margin-top: 8px; padding: 16px;
    background: #1e1e2e; border-radius: var(--radius-sm);
    border: 1px solid #333;
}
.video-step-img code { font-family: var(--font-mono); font-size: 13px; color: var(--accent-4); }

/* Lesson Footer */
.lesson-footer {
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px;
}
.lesson-nav-btn {
    padding: 12px 28px; border: none;
    background: var(--gradient-primary);
    color: white; font-family: var(--font);
    font-size: 15px; font-weight: 600;
    border-radius: var(--radius-xl); cursor: pointer;
    transition: var(--transition);
    display: flex; align-items: center; gap: 8px;
}
.lesson-nav-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.lesson-nav-btn.secondary {
    background: var(--bg-card); border: 1px solid var(--border-glass);
    color: var(--text-secondary);
}
.lesson-nav-btn.secondary:hover { border-color: rgba(108,92,231,0.3); color: var(--text-primary); }
.lesson-complete-btn {
    padding: 12px 28px; border: none;
    background: var(--gradient-secondary);
    color: white; font-family: var(--font);
    font-size: 15px; font-weight: 600;
    border-radius: var(--radius-xl); cursor: pointer;
    transition: var(--transition);
}
.lesson-complete-btn:hover { transform: translateY(-2px); }
.lesson-complete-btn.completed { opacity: 0.6; pointer-events: none; }

/* ============ FOOTER ============ */
.footer {
    background: rgba(10,10,26,0.8);
    border-top: 1px solid var(--border-glass);
    padding: 24px;
    text-align: center;
    position: relative; z-index: 1;
}
.footer p { color: var(--text-muted); font-size: 13px; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
    .hero { grid-template-columns: 1fr; gap: 40px; }
    .hero-title { font-size: 40px; }
    .hero-visual { height: 300px; }
}
@media (max-width: 768px) {
    .nav { display: none; }
    .mobile-menu-btn { display: block; }
    .hero-title { font-size: 32px; }
    .hero-stats { gap: 20px; }
    .stat-number { font-size: 28px; }
    .main { padding: 80px 16px 24px; }
    .lesson-body, .quiz-question, .week-header, .lesson-header, .quiz-header { padding: 24px; }
    .weeks-grid { grid-template-columns: 1fr; }
    .quiz-footer, .lesson-footer { flex-direction: column; }
    .lesson-nav-btn, .quiz-btn { width: 100%; justify-content: center; }
    .drag-container { flex-direction: column; }
    .cv-example { padding: 20px; }
    .hero-visual { display: none; }
}
@media (max-width: 480px) {
    .hero-title { font-size: 26px; }
    .hero-stats { flex-wrap: wrap; gap: 16px; }
}

/* Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.5s ease forwards; }