/* ====================================================
   GenAI 101 — Main Stylesheet
   ==================================================== */

/* ---- CSS Variables ---- */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #06b6d4;
  --accent: #f59e0b;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  --bg-dark: #0f0f1a;
  --bg-card: #161627;
  --bg-card-2: #1e1e35;
  --border: rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.12);

  --text-primary: #f0f0ff;
  --text-secondary: #a0a0c0;
  --text-muted: #6060a0;

  --gradient-main: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
  --gradient-alt: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --gradient-purple: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 64px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.3);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --font-base: 'Inter', sans-serif;
  --font-display: 'Space Grotesk', sans-serif;

  --transition: 0.25s ease;
  --transition-slow: 0.4s ease;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-base);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ---- Utility ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.section-tag {
  display: inline-block;
  background: rgba(99,102,241,0.15);
  color: var(--primary-light);
  border: 1px solid rgba(99,102,241,0.3);
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.2;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 540px;
  margin: 0 auto;
}

/* ---- Buttons ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(99,102,241,0.5);
}

/* ====================================================
   NAVBAR
   ==================================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(15,15,26,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(15,15,26,0.98);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 68px;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.logo-icon {
  width: 36px; height: 36px;
  background: var(--gradient-main);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.logo-accent { color: var(--primary-light); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.06);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1rem;
}

/* ====================================================
   HERO
   ==================================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 24px 80px;
  max-width: 1200px;
  margin: 0 auto;
  gap: 60px;
  position: relative;
}

.hero-bg-grid {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(rgba(99,102,241,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -1;
}

.hero-content {
  flex: 1;
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.3);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 500px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-main);
  color: white;
  padding: 16px 32px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
  box-shadow: 0 4px 24px rgba(99,102,241,0.4);
}

.btn-hero-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 36px rgba(99,102,241,0.55);
}

.btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--text-primary);
  padding: 16px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.btn-hero-secondary:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.2);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.stat { text-align: center; }

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border-light);
}

/* Hero Visual */
.hero-visual {
  flex: 1;
  position: relative;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  max-width: 360px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.ai-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.ai-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.ai-dot.green { background: var(--success); box-shadow: 0 0 8px var(--success); }

.ai-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.ai-card-body { display: flex; flex-direction: column; gap: 12px; }

.ai-prompt, .ai-response {
  font-size: 0.88rem;
  line-height: 1.5;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.ai-prompt { color: var(--text-secondary); }
.ai-response { color: var(--text-primary); }
.ai-prompt i { color: var(--primary-light); margin-top: 2px; flex-shrink: 0; }
.ai-response i { color: var(--success); margin-top: 2px; flex-shrink: 0; }

.ai-card-sm {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card-2);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  white-space: nowrap;
}

.ai-card-sm.floating-slow { bottom: 10%; left: -20px; }
.ai-card-sm.right-badge { top: 10%; right: -20px; }
.ai-card-sm i { color: var(--accent); }
.ai-card-sm.right-badge i { color: var(--success); }

/* Animations */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-14px); }
}
@keyframes floatSlow {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-8px); }
}
@keyframes floatMed {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.floating { animation: float 5s ease-in-out infinite; }
.floating-slow { animation: floatSlow 7s ease-in-out infinite 1s; }
.floating-med { animation: floatMed 6s ease-in-out infinite 0.5s; }

/* ====================================================
   PILLARS SECTION
   ==================================================== */
.section-pillars {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-card) 100%);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pillar-card {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.pillar-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}

.pillar-1::before { background: var(--gradient-main); }
.pillar-2::before { background: var(--gradient-alt); }
.pillar-3::before { background: var(--gradient-purple); }

.pillar-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-light);
  box-shadow: var(--shadow-lg);
}

.pillar-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
}

.pillar-1 .pillar-icon { background: rgba(99,102,241,0.15); color: var(--primary); }
.pillar-2 .pillar-icon { background: rgba(245,158,11,0.15); color: var(--accent); }
.pillar-3 .pillar-icon { background: rgba(139,92,246,0.15); color: #a78bfa; }

.pillar-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.pillar-card p {
  color: var(--text-secondary);
  font-size: 0.93rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.pillar-list { display: flex; flex-direction: column; gap: 8px; }

.pillar-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.pillar-list li i { color: var(--success); font-size: 0.75rem; }

/* ====================================================
   MODULES SECTION
   ==================================================== */
.section-modules {
  padding: 100px 0;
  background: var(--bg-card);
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.module-card {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: var(--transition);
}

.module-card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-lg);
}

.module-header {
  padding: 28px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mod-1 { background: linear-gradient(135deg, rgba(99,102,241,0.3), rgba(6,182,212,0.2)); }
.mod-2 { background: linear-gradient(135deg, rgba(245,158,11,0.3), rgba(239,68,68,0.2)); }

.module-number {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.module-badge {
  background: rgba(255,255,255,0.15);
  color: white;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
}

.module-body { padding: 28px 32px; }

.module-body h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.module-desc {
  color: var(--text-secondary);
  font-size: 0.93rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.module-lessons {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 28px;
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
}

.lesson-item:hover {
  background: rgba(255,255,255,0.04);
}

.lesson-num {
  width: 28px; height: 28px;
  background: rgba(99,102,241,0.15);
  color: var(--primary-light);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.lesson-name {
  flex: 1;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.lesson-duration {
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-module {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: white;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.93rem;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(99,102,241,0.3);
  width: 100%;
  justify-content: center;
}

.btn-module:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(99,102,241,0.45);
}

.btn-module-2 {
  background: var(--gradient-alt);
  box-shadow: 0 4px 16px rgba(245,158,11,0.3);
}

.btn-module-2:hover {
  box-shadow: 0 6px 24px rgba(245,158,11,0.45);
}

/* ====================================================
   CORE FRAMEWORK SECTION
   ==================================================== */
.section-core {
  padding: 100px 0;
  background: var(--bg-dark);
}

.core-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.core-text .section-tag { margin-bottom: 16px; }

.core-text h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
}

.core-text p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 32px;
}

.core-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.core-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.core-card:hover {
  border-color: var(--border-light);
  transform: translateX(8px);
}

.core-letter {
  width: 52px; height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  flex-shrink: 0;
}

.core-c .core-letter { background: rgba(99,102,241,0.2); color: var(--primary-light); }
.core-o .core-letter { background: rgba(6,182,212,0.2); color: var(--secondary); }
.core-r .core-letter { background: rgba(245,158,11,0.2); color: var(--accent); }
.core-e .core-letter { background: rgba(16,185,129,0.2); color: var(--success); }

.core-info strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.core-info p {
  font-size: 0.87rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ====================================================
   FEATURED LESSONS
   ==================================================== */
.section-featured {
  padding: 100px 0;
  background: var(--bg-card);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.featured-card {
  background: var(--bg-card-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  display: block;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.featured-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.04), transparent);
  opacity: 0;
  transition: var(--transition);
}

.featured-card:hover {
  transform: translateY(-8px);
  border-color: rgba(99,102,241,0.4);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.featured-card:hover::after { opacity: 1; }

.featured-card-alt:hover {
  border-color: rgba(245,158,11,0.4);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(245,158,11,0.2);
}

.featured-card-purple:hover {
  border-color: rgba(139,92,246,0.4);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(139,92,246,0.2);
}

.featured-icon {
  width: 52px; height: 52px;
  background: rgba(99,102,241,0.15);
  color: var(--primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.featured-card-alt .featured-icon {
  background: rgba(245,158,11,0.15);
  color: var(--accent);
}

.featured-card-purple .featured-icon {
  background: rgba(139,92,246,0.15);
  color: #a78bfa;
}

.featured-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.featured-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}

.featured-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.featured-meta span { display: flex; align-items: center; gap: 4px; }

.featured-cta {
  margin-left: auto;
  color: var(--primary-light) !important;
  font-weight: 600;
}

/* ====================================================
   TESTIMONIALS
   ==================================================== */
.section-testimonials {
  padding: 100px 0;
  background: var(--bg-dark);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
}

.testimonial-card-alt {
  background: rgba(99,102,241,0.08);
  border-color: rgba(99,102,241,0.2);
}

.stars {
  display: flex;
  gap: 3px;
  color: var(--accent);
  margin-bottom: 16px;
}

.testimonial-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}

.testimonial-card footer {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
}

/* ====================================================
   CTA SECTION
   ==================================================== */
.section-cta { padding: 80px 0; }

.cta-box {
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(6,182,212,0.1));
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: var(--radius-xl);
  padding: 60px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-text h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  margin-bottom: 10px;
}

.cta-text p {
  color: var(--text-secondary);
  font-size: 0.97rem;
  line-height: 1.6;
  max-width: 480px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: white;
  padding: 15px 28px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 0.97rem;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(99,102,241,0.4);
  white-space: nowrap;
}

.btn-cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99,102,241,0.55);
}

.btn-cta-secondary {
  color: var(--text-secondary);
  font-size: 0.93rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-cta-secondary:hover { color: var(--text-primary); }

/* ====================================================
   FOOTER
   ==================================================== */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo { margin-bottom: 16px; }

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-links h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links li, .footer-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-links a:hover { color: var(--primary-light); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ====================================================
   LESSON PAGE SHARED STYLES
   ==================================================== */
.lesson-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 24px 80px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
}

.lesson-sidebar {
  position: sticky;
  top: 88px;
  height: fit-content;
}

.lesson-nav-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 16px;
}

.lesson-nav-card h4 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.lesson-toc { display: flex; flex-direction: column; gap: 4px; }

.lesson-toc a {
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.87rem;
  color: var(--text-secondary);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.lesson-toc a:hover, .lesson-toc a.active {
  background: rgba(99,102,241,0.12);
  color: var(--primary-light);
}

.lesson-toc a i { font-size: 0.75rem; color: var(--text-muted); }

.lesson-main { min-width: 0; }

.lesson-header {
  margin-bottom: 36px;
}

.lesson-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.lesson-breadcrumb a { color: var(--primary-light); }
.lesson-breadcrumb i { font-size: 0.7rem; }

.lesson-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.lesson-meta-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  padding: 5px 12px;
  border-radius: 100px;
  border: 1px solid var(--border);
}

.lesson-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 12px;
}

.lesson-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
}

/* Video Placeholder */
.video-container {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}

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

.video-play-btn {
  width: 72px; height: 72px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto 16px;
  box-shadow: 0 0 0 0 rgba(99,102,241,0.5);
  animation: pulse 2s ease-in-out infinite;
  cursor: pointer;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(99,102,241,0.5); }
  50% { box-shadow: 0 0 0 20px rgba(99,102,241,0); }
}

.video-placeholder p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Lesson Content Sections */
.lesson-section {
  margin-bottom: 48px;
}

.lesson-section-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.lesson-section-title i {
  color: var(--primary-light);
  font-size: 1.1rem;
}

.lesson-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
  font-size: 0.97rem;
}

.lesson-section p strong { color: var(--text-primary); }

/* Key Takeaways */
.key-takeaways {
  background: rgba(99,102,241,0.08);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 32px;
}

.key-takeaways h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-light);
  margin-bottom: 16px;
}

.takeaway-list { display: flex; flex-direction: column; gap: 10px; }

.takeaway-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.93rem;
  color: var(--text-secondary);
}

.takeaway-list li i { color: var(--success); margin-top: 3px; flex-shrink: 0; }

/* Prompt Box */
.prompt-box {
  background: #0d0d1a;
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 24px 0;
  position: relative;
}

.prompt-box-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.prompt-box pre {
  font-family: 'Courier New', monospace;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
}

.prompt-box .copy-btn {
  position: absolute;
  top: 16px; right: 16px;
  background: rgba(99,102,241,0.2);
  border: 1px solid rgba(99,102,241,0.3);
  color: var(--primary-light);
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
}

.prompt-box .copy-btn:hover {
  background: rgba(99,102,241,0.3);
}

/* Warning / Note boxes */
.lesson-callout {
  display: flex;
  gap: 14px;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  margin: 24px 0;
  font-size: 0.93rem;
  line-height: 1.6;
}

.callout-warning {
  background: rgba(245,158,11,0.08);
  border: 1px solid rgba(245,158,11,0.25);
  color: var(--text-secondary);
}

.callout-warning i { color: var(--warning); margin-top: 2px; flex-shrink: 0; }

.callout-danger {
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.25);
  color: var(--text-secondary);
}

.callout-danger i { color: var(--danger); margin-top: 2px; flex-shrink: 0; }

.callout-success {
  background: rgba(16,185,129,0.08);
  border: 1px solid rgba(16,185,129,0.25);
  color: var(--text-secondary);
}

.callout-success i { color: var(--success); margin-top: 2px; flex-shrink: 0; }

.callout-info {
  background: rgba(6,182,212,0.08);
  border: 1px solid rgba(6,182,212,0.25);
  color: var(--text-secondary);
}

.callout-info i { color: var(--secondary); margin-top: 2px; flex-shrink: 0; }

/* Your Turn Activity */
.your-turn {
  background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(6,182,212,0.06));
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: var(--radius-xl);
  padding: 36px 40px;
  margin: 40px 0;
}

.your-turn-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.your-turn-title h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
}

.your-turn-icon {
  width: 44px; height: 44px;
  background: var(--gradient-main);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.your-turn p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.reflection-questions {
  background: rgba(0,0,0,0.2);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 20px;
}

.reflection-questions h5 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary-light);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.reflection-questions ol {
  list-style: decimal;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.reflection-questions li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Lesson Nav Bottom */
.lesson-nav-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  margin-top: 48px;
  gap: 20px;
}

.lesson-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  transition: var(--transition);
}

.lesson-nav-btn:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
}

.lesson-nav-btn.next {
  background: var(--gradient-main);
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(99,102,241,0.3);
}

.lesson-nav-btn.next:hover {
  transform: translateX(4px);
  box-shadow: 0 6px 24px rgba(99,102,241,0.45);
}

/* ====================================================
   COURSES PAGE
   ==================================================== */
.courses-hero {
  padding: 120px 24px 60px;
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.courses-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.courses-hero p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto 40px;
}

.progress-bar-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  max-width: 600px;
  margin: 0 auto;
  text-align: left;
}

.progress-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-weight: 600;
}

.progress-bar-track {
  background: rgba(255,255,255,0.06);
  border-radius: 100px;
  height: 8px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--gradient-main);
  border-radius: 100px;
  transition: width 1s ease;
}

/* Courses List */
.courses-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.module-section { margin-bottom: 60px; }

.module-section-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.module-section-num {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  flex-shrink: 0;
}

.module-section-num.m1 { background: rgba(99,102,241,0.2); color: var(--primary-light); }
.module-section-num.m2 { background: rgba(245,158,11,0.2); color: var(--accent); }

.module-section-info h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
}

.module-section-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.lessons-list { display: flex; flex-direction: column; gap: 12px; }

.lesson-row {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: var(--transition);
  cursor: pointer;
}

.lesson-row:hover {
  border-color: var(--border-light);
  background: var(--bg-card-2);
  transform: translateX(4px);
}

.lesson-row-num {
  width: 36px; height: 36px;
  background: rgba(99,102,241,0.12);
  color: var(--primary-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.lesson-row-info { flex: 1; }

.lesson-row-title {
  font-size: 0.97rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.lesson-row-desc {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.lesson-row-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.lesson-row-time {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.lesson-row-level {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
}

.level-beginner { background: rgba(16,185,129,0.1); color: var(--success); }
.level-intermediate { background: rgba(6,182,212,0.1); color: var(--secondary); }
.level-advanced { background: rgba(245,158,11,0.1); color: var(--accent); }

.lesson-row-cta {
  font-size: 0.82rem;
  color: var(--primary-light);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ====================================================
   PROMPT LIBRARY PAGE
   ==================================================== */
.prompts-hero {
  padding: 120px 24px 60px;
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.prompts-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

.prompts-filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border-light);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

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

.prompts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.prompt-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.prompt-card:hover {
  border-color: var(--border-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.prompt-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

.prompt-card h4 {
  font-size: 0.97rem;
  font-weight: 700;
  flex: 1;
  margin-right: 12px;
}

.prompt-card-tag {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  white-space: nowrap;
  background: rgba(99,102,241,0.12);
  color: var(--primary-light);
}

.prompt-card p {
  color: var(--text-secondary);
  font-size: 0.87rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.prompt-snippet {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-family: 'Courier New', monospace;
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  white-space: pre-wrap;
}

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

.prompt-lesson-link {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.copy-prompt-btn {
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.25);
  color: var(--primary-light);
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.copy-prompt-btn:hover {
  background: rgba(99,102,241,0.25);
}

/* ====================================================
   RESPONSIVE
   ==================================================== */
@media (max-width: 1024px) {
  .pillars-grid { grid-template-columns: 1fr 1fr; }
  .featured-grid { grid-template-columns: 1fr 1fr; }
  .testimonials-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .core-content { gap: 40px; }
  .lesson-layout { grid-template-columns: 240px 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 4px;
  }

  .hero {
    flex-direction: column;
    padding-top: 100px;
    text-align: center;
  }

  .hero-cta { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { width: 100%; }
  .ai-card-sm { display: none; }

  .pillars-grid { grid-template-columns: 1fr; }
  .modules-grid { grid-template-columns: 1fr; }
  .featured-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .core-content { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-box { flex-direction: column; text-align: center; }
  .cta-actions { justify-content: center; }
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-sidebar { position: static; }
  .prompts-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .lesson-nav-bottom { flex-direction: column; }
}