@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

/* =============================================
   CSS VARIABLES & DESIGN TOKENS
   Neural Network Visualization Style
   ============================================= */
:root {
  --bg-primary: #050a14;
  --bg-secondary: #080f1e;
  --bg-card: #0d1628;
  --bg-card-hover: #111e35;
  --bg-surface: #0a1220;

  --color-cyan: #00d4ff;
  --color-cyan-dim: #00a8cc;
  --color-cyan-glow: rgba(0, 212, 255, 0.15);
  --color-blue: #1a6fff;
  --color-blue-dim: #1055cc;
  --color-node: #00ffcc;
  --color-node-dim: rgba(0, 255, 204, 0.6);

  --text-primary: #e8f0ff;
  --text-secondary: #8a9bc4;
  --text-muted: #4a5a7a;
  --text-accent: #00d4ff;

  --border-color: rgba(0, 212, 255, 0.12);
  --border-glow: rgba(0, 212, 255, 0.3);

  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;

  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-btn: 0 0 20px rgba(0, 212, 255, 0.3);

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  font-size: 16px;
}

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

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #fff;
}

ul {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.2rem; }

p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* =============================================
   NEURAL NETWORK CANVAS BACKGROUND
   ============================================= */
#neural-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.45;
}

/* =============================================
   LAYOUT UTILITIES
   ============================================= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 90px 0;
  position: relative;
}

.section-sm {
  padding: 60px 0;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

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

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mt-64 { margin-top: 64px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }

/* =============================================
   SECTION HEADER
   ============================================= */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-cyan);
  background: var(--color-cyan-glow);
  border: 1px solid rgba(0, 212, 255, 0.2);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-title {
  margin-bottom: 16px;
}

.section-title span {
  color: var(--color-cyan);
}

.section-subtitle {
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-secondary);
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-cyan);
  color: var(--bg-primary);
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  background: #33ddff;
  color: var(--bg-primary);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-cyan);
  border: 1px solid var(--border-glow);
}

.btn-secondary:hover {
  background: var(--color-cyan-glow);
  color: #fff;
  border-color: var(--color-cyan);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

/* =============================================
   CARDS
   ============================================= */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.3), transparent);
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 212, 255, 0.25);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card:hover::before {
  opacity: 1;
}

/* =============================================
   HEADER / NAVIGATION
   ============================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0;
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(5, 10, 20, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-cyan);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 0 16px rgba(0,212,255,0.4);
}

.logo-icon svg {
  width: 20px;
  height: 20px;
  fill: var(--bg-primary);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
}

.logo-text span {
  color: var(--color-cyan);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: #fff;
  background: rgba(255,255,255,0.06);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: rgba(5, 10, 20, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 999;
  padding: 24px 40px;
  flex-direction: column;
  gap: 8px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  color: var(--text-secondary);
  font-size: 1rem;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
  font-weight: 500;
}

.mobile-menu a:hover {
  color: var(--color-cyan);
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  position: relative;
  overflow: hidden;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-cyan-glow);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 100px;
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-cyan);
  margin-bottom: 28px;
  letter-spacing: 0.05em;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--color-node);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-title .accent {
  color: var(--color-cyan);
  position: relative;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-cyan);
}

.hero-stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-img-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border-glow);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

.hero-img-wrap img {
  width: 100%;
  max-width: 600px;
  height: 480px;
  object-fit: cover;
}

.hero-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.08) 0%, transparent 60%);
  border-radius: var(--radius-xl);
}

.hero-float-card {
  position: absolute;
  background: rgba(13, 22, 40, 0.95);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}

.hero-float-card.card-tl {
  top: -20px;
  left: -40px;
}

.hero-float-card.card-br {
  bottom: 30px;
  right: -30px;
}

.float-card-title {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.float-card-value {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-node);
}

.float-card-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* =============================================
   TRUST / PARTNERS STRIP
   ============================================= */
.partners-strip {
  padding: 32px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: rgba(8, 15, 30, 0.6);
  position: relative;
  z-index: 1;
}

.partners-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 20px;
  text-align: center;
}

.partners-list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.partner-item {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  transition: var(--transition);
}

.partner-item:hover {
  color: var(--color-cyan);
}

/* =============================================
   FEATURES / ABOUT SECTION
   ============================================= */
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--color-cyan-glow);
  border: 1px solid rgba(0,212,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  transition: var(--transition);
}

.card:hover .feature-icon {
  background: rgba(0,212,255,0.2);
  border-color: var(--color-cyan);
  box-shadow: 0 0 16px rgba(0,212,255,0.2);
}

.feature-title {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-text {
  font-size: 0.93rem;
  line-height: 1.65;
}

/* =============================================
   COURSE CARDS
   ============================================= */
.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  border-color: rgba(0,212,255,0.3);
  box-shadow: var(--shadow-glow);
  transform: translateY(-6px);
}

.course-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.course-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 12px;
  border-radius: 100px;
}

.badge-beginner {
  background: rgba(0, 255, 100, 0.1);
  color: #00ff64;
  border: 1px solid rgba(0,255,100,0.2);
}

.badge-intermediate {
  background: rgba(0, 212, 255, 0.1);
  color: var(--color-cyan);
  border: 1px solid rgba(0,212,255,0.2);
}

.badge-advanced {
  background: rgba(255, 120, 0, 0.1);
  color: #ff7800;
  border: 1px solid rgba(255,120,0,0.2);
}

.course-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.course-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.course-title {
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.3;
}

.course-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-muted);
  flex: 1;
  margin-bottom: 20px;
}

.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.course-info {
  display: flex;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.course-info span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* =============================================
   INSTRUCTOR / TEAM CARDS
   ============================================= */
.instructor-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  text-align: center;
}

.instructor-card:hover {
  border-color: rgba(0,212,255,0.3);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.instructor-img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  object-position: top;
}

.instructor-body {
  padding: 20px;
}

.instructor-name {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.instructor-role {
  font-size: 0.83rem;
  color: var(--color-cyan);
  font-weight: 500;
  margin-bottom: 10px;
}

.instructor-bio {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* =============================================
   TESTIMONIALS
   ============================================= */
.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: rgba(0,212,255,0.25);
  box-shadow: var(--shadow-glow);
}

.testimonial-quote {
  font-size: 2.5rem;
  color: var(--color-cyan);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.5;
  font-family: Georgia, serif;
}

.testimonial-text {
  font-size: 0.97rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-glow);
}

.testimonial-name {
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

.stars {
  color: #ffd700;
  font-size: 0.85rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

/* =============================================
   CTA BANNER
   ============================================= */
.cta-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 70px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 0 auto;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(0,212,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.05rem;
  margin-bottom: 36px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* =============================================
   BLOG CARDS
   ============================================= */
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  border-color: rgba(0,212,255,0.25);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.blog-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.blog-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-category {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-cyan);
  margin-bottom: 10px;
}

.blog-title {
  font-size: 1.07rem;
  margin-bottom: 10px;
  line-height: 1.3;
  flex: 1;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

/* =============================================
   FAQ
   ============================================= */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.open {
  border-color: rgba(0,212,255,0.25);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  text-align: left;
  gap: 16px;
}

.faq-q-text {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.faq-arrow {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-cyan);
  font-size: 1.1rem;
  transition: var(--transition);
}

.faq-item.open .faq-arrow {
  transform: rotate(45deg);
  background: var(--color-cyan-glow);
  border-color: var(--color-cyan);
}

.faq-answer {
  display: none;
  padding: 0 28px 22px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
}

/* =============================================
   FORM ELEMENTS
   ============================================= */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 13px 16px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-cyan);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.08);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
}

/* =============================================
   BREADCRUMB
   ============================================= */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 100px 0 24px;
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb a:hover {
  color: var(--color-cyan);
}

.breadcrumb .sep {
  color: var(--border-glow);
}

.breadcrumb .current {
  color: var(--text-secondary);
}

/* =============================================
   STAT COUNTERS
   ============================================= */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-cyan), transparent);
  opacity: 0;
  transition: var(--transition);
}

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

.stat-card:hover {
  border-color: rgba(0,212,255,0.25);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

.stat-value {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--color-cyan);
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* =============================================
   PAGE HERO (inner pages)
   ============================================= */
.page-hero {
  padding: 160px 0 80px;
  text-align: center;
  position: relative;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(0,212,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 72px 0 0;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 280px;
}

.footer-col-title {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

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

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

.footer-links a:hover {
  color: var(--color-cyan);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  align-items: flex-start;
}

.footer-contact-icon {
  color: var(--color-cyan);
  font-size: 0.9rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.footer-contact-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom-text {
  font-size: 0.83rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 0.83rem;
  color: var(--text-muted);
}

.footer-bottom-links a:hover {
  color: var(--color-cyan);
}

.social-links {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.social-link:hover {
  background: var(--color-cyan-glow);
  border-color: var(--color-cyan);
  color: var(--color-cyan);
}

/* =============================================
   DIVIDER
   ============================================= */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
  margin: 16px 0;
}

/* =============================================
   GLOW ORBS (decorative background)
   ============================================= */
.glow-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.glow-orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0,212,255,0.04) 0%, transparent 70%);
  top: -100px;
  right: -100px;
}

.glow-orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(26,111,255,0.05) 0%, transparent 70%);
  bottom: 0;
  left: -100px;
}

/* =============================================
   TAGS
   ============================================= */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  padding: 5px 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  font-size: 0.78rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.tag:hover {
  border-color: rgba(0,212,255,0.3);
  color: var(--color-cyan);
  background: var(--color-cyan-glow);
}

/* =============================================
   COOKIE BANNER
   ============================================= */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: min(700px, calc(100% - 48px));
  background: rgba(13, 22, 40, 0.98);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  z-index: 9999;
  display: flex;
  align-items: center;
  gap: 24px;
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  flex-wrap: wrap;
}

.cookie-text {
  flex: 1;
  font-size: 0.88rem;
  color: var(--text-secondary);
  min-width: 200px;
}

.cookie-text a {
  color: var(--color-cyan);
}

.cookie-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

/* =============================================
   BACK TO TOP
   ============================================= */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--color-cyan);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 100;
  border: none;
  box-shadow: var(--shadow-btn);
  color: var(--bg-primary);
  font-size: 1.1rem;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: #33ddff;
  transform: translateY(-3px);
}

/* =============================================
   PROGRESS BAR (course detail)
   ============================================= */
.progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-node));
  border-radius: 3px;
  transition: width 1s ease;
}

/* =============================================
   INFO BOXES
   ============================================= */
.info-box {
  background: var(--color-cyan-glow);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.info-box-icon {
  font-size: 1.2rem;
  color: var(--color-cyan);
  flex-shrink: 0;
}

.info-box-text {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* =============================================
   TABLE
   ============================================= */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.data-table th {
  background: var(--bg-card);
  padding: 14px 18px;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  vertical-align: top;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background: rgba(255,255,255,0.02);
}

/* =============================================
   POLICY PAGES
   ============================================= */
.policy-content {
  max-width: 800px;
  margin: 0 auto;
}

.policy-content h1 {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.policy-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.policy-content h2 {
  font-size: 1.35rem;
  margin: 40px 0 16px;
  color: var(--color-cyan);
}

.policy-content h3 {
  font-size: 1.1rem;
  margin: 28px 0 12px;
}

.policy-content p,
.policy-content li {
  font-size: 0.97rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 14px;
}

.policy-content ul,
.policy-content ol {
  margin: 12px 0 20px 24px;
}

.policy-content ul li {
  list-style: disc;
  margin-bottom: 8px;
}

.policy-content ol li {
  list-style: decimal;
  margin-bottom: 8px;
}

.policy-content a {
  color: var(--color-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.policy-toc {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 40px;
}

.policy-toc-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.policy-toc ol {
  margin: 0;
  padding-left: 20px;
}

.policy-toc li {
  margin-bottom: 7px;
  font-size: 0.9rem;
}

.policy-toc a {
  color: var(--color-cyan);
  text-decoration: none;
}

.policy-toc a:hover {
  text-decoration: underline;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero {
    padding-top: 100px;
  }
  .hero .grid-2 {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    display: none;
  }
  .hero-desc {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-menu,
  .nav-actions {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .section {
    padding: 60px 0;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .cta-section {
    padding: 48px 28px;
  }
  .hero-stats {
    gap: 28px;
  }
  .container,
  .container-wide {
    padding: 0 16px;
  }
  .nav-inner {
    padding: 0 16px;
  }
  .mobile-menu {
    padding: 24px 16px;
  }
}

/* =============================================
   POLICY PAGES LAYOUT
   ============================================= */
.policy-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
}

.policy-toc {
  position: sticky;
  top: 100px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
}

.policy-toc-link {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 5px 8px;
  border-radius: 5px;
  transition: var(--transition);
  line-height: 1.4;
}

.policy-toc-link:hover {
  background: var(--bg-card-hover);
  color: var(--color-cyan);
}

.policy-content h2 {
  font-size: 1.35rem;
  margin: 40px 0 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
  color: var(--text-primary);
}

.policy-content h2:first-of-type {
  margin-top: 16px;
  border-top: none;
}

.policy-content h3 {
  font-size: 1.05rem;
  margin: 24px 0 10px;
  color: var(--text-primary);
}

.policy-content p {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 14px;
}

.policy-content ul {
  padding-left: 20px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.policy-content ul li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  list-style: disc;
}

.policy-content a {
  color: var(--color-cyan);
  text-decoration: underline;
  text-decoration-color: rgba(0,212,255,0.35);
}

.policy-content a:hover {
  color: #fff;
  text-decoration-color: rgba(255,255,255,0.5);
}

/* =============================================
   CONTACT FORM
   ============================================= */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 11px 16px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: var(--transition);
  width: 100%;
  outline: none;
}

.form-input:focus {
  border-color: var(--color-cyan);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-input option {
  background: var(--bg-card);
  color: var(--text-primary);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* =============================================
   FAQ ACCORDION
   ============================================= */
.faq-item {
  border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 16px 0;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--color-cyan);
}

.faq-icon {
  font-size: 1.2rem;
  color: var(--color-cyan);
  flex-shrink: 0;
  transition: var(--transition);
  font-weight: 300;
  line-height: 1;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 0 16px;
}

.faq-answer p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.faq-answer.open {
  display: block;
}

/* =============================================
   BLOG POST ARTICLE
   ============================================= */
.blog-post-content h2 {
  font-size: 1.4rem;
  margin: 36px 0 14px;
  color: var(--text-primary);
}

.blog-post-content h3 {
  font-size: 1.1rem;
  margin: 24px 0 10px;
  color: var(--text-primary);
}

.blog-post-content p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* =============================================
   RESPONSIVE: POLICY & CONTACT
   ============================================= */
@media (max-width: 900px) {
  .policy-layout {
    grid-template-columns: 1fr;
  }
  .policy-toc {
    position: static;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-cta {
    flex-direction: column;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .cookie-banner {
    flex-direction: column;
    bottom: 0;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    width: 100%;
    transform: none;
    left: 0;
  }
}