/* ========================================
   PromptSkill - Indigo Nebula Design System
   Based on Stitch Design Output
   ======================================== */

/* CSS Custom Properties */
:root {
  --bg: #090e1b;
  --surface: #090e1b;
  --surface-container: #131929;
  --surface-container-low: #0d1321;
  --surface-container-high: #191f31;
  --surface-container-highest: #1e2538;
  --surface-bright: #242c40;
  --surface-variant: #1e2538;

  --primary: #a3a6ff;
  --primary-dim: #6063ee;
  --primary-container: #9396ff;
  --secondary: #ac8aff;
  --secondary-dim: #8455ef;
  --secondary-container: #5516be;
  --tertiary: #ec63ff;
  --tertiary-dim: #d946ef;

  --on-bg: #e4e7fb;
  --on-surface: #e4e7fb;
  --on-surface-variant: #a6aabc;
  --outline: #707586;
  --outline-variant: #434857;

  --gradient-primary: linear-gradient(135deg, #6063ee, #8455ef);
  --gradient-accent: linear-gradient(135deg, #8b5cf6, #d946ef);
  --gradient-text: linear-gradient(135deg, #a3a6ff, #ec63ff);
  --gradient-card: linear-gradient(145deg, rgba(30, 37, 56, 0.6), rgba(19, 25, 41, 0.4));

  --glow-primary: 0 0 40px rgba(99, 102, 241, 0.15);
  --glow-accent: 0 0 40px rgba(139, 92, 246, 0.15);
  --glow-card: 0 20px 40px rgba(99, 102, 241, 0.08);

  --radius-sm: 0.75rem;
  --radius-md: 1.25rem;
  --radius-lg: 1.75rem;
  --radius-xl: 2.5rem;
  --radius-full: 50rem;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--on-bg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ========================================
   Navigation
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  backdrop-filter: blur(20px);
  background: rgba(9, 14, 27, 0.75);
  border-bottom: 1px solid rgba(67, 72, 87, 0.15);
  transition: var(--transition);
}

.navbar.scrolled {
  padding: 0.6rem 0;
  background: rgba(9, 14, 27, 0.92);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: var(--radius-sm);
  background: var(--gradient-primary);
  color: white;
  font-size: 1.2rem;
}

.logo-icon .material-symbols-outlined {
  font-size: 1.2rem;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  transition: var(--transition);
  position: relative;
  padding: 0.3rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  color: var(--on-surface);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  padding: 0.6rem 1.6rem;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: white;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.25);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.4);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

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

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  background: rgba(9, 14, 27, 0.97);
  backdrop-filter: blur(30px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.mobile-menu.active {
  display: flex;
  opacity: 1;
  pointer-events: all;
}

.mobile-link {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--on-surface-variant);
  transition: var(--transition);
}

.mobile-link:hover {
  color: var(--primary);
}

.mobile-cta {
  margin-top: 1rem;
  font-size: 1rem;
  padding: 0.8rem 2.5rem;
}

/* ========================================
   Hero Section
   ======================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 4rem;
  overflow: hidden;
}

.hero-bg-effects {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.3), transparent);
  top: -10%;
  right: -5%;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.25), transparent);
  bottom: 10%;
  left: -5%;
  animation-delay: -3s;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(217, 70, 239, 0.2), transparent);
  top: 40%;
  right: 20%;
  animation-delay: -5s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -30px) scale(1.05); }
  66% { transform: translate(-15px, 20px) scale(0.95); }
}

/* Floating Code Snippets */
.floating-code {
  position: absolute;
  padding: 0.8rem 1.2rem;
  background: rgba(30, 37, 56, 0.5);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  border: 1px solid rgba(67, 72, 87, 0.15);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.8rem;
  color: var(--on-surface-variant);
  box-shadow: var(--glow-card);
  animation: floatCode 12s ease-in-out infinite;
  white-space: nowrap;
}

.floating-code-1 {
  top: 20%;
  right: 8%;
  animation-delay: 0s;
}

.floating-code-2 {
  bottom: 30%;
  left: 5%;
  animation-delay: -4s;
}

.floating-code-3 {
  top: 35%;
  left: 10%;
  animation-delay: -8s;
}

@keyframes floatCode {
  0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.6; }
  50% { transform: translateY(-15px) rotate(1deg); opacity: 0.9; }
}

.code-keyword { color: #a3a6ff; }
.code-string { color: #ec63ff; }
.code-func { color: #ac8aff; }
.code-comment { color: #707586; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  padding: 0 2rem;
}

.hero-content {
  text-align: left;
}

/* Hero Image */
.hero-image {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image-glow {
  position: absolute;
  width: 80%;
  height: 80%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2), transparent 70%);
  filter: blur(40px);
  animation: pulse 4s ease-in-out infinite;
}

.hero-img {
  width: 100%;
  max-width: 500px;
  height: auto;
  border-radius: var(--radius-xl);
  animation: floatHero 6s ease-in-out infinite;
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 20px 40px rgba(99, 102, 241, 0.15));
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease-out;
}

.hero-badge .material-symbols-outlined {
  font-size: 1rem;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease-out 0.1s both;
}

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

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--on-surface-variant);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: white;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 25px rgba(99, 102, 241, 0.3);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 35px rgba(99, 102, 241, 0.45);
}

.btn-primary .material-symbols-outlined {
  font-size: 1.2rem;
}

.btn-large {
  padding: 1rem 2.8rem;
  font-size: 1.1rem;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--primary);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1.5px solid rgba(163, 166, 255, 0.3);
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline:hover {
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(163, 166, 255, 0.5);
  transform: translateY(-3px);
}

.btn-outline .material-symbols-outlined {
  font-size: 1.2rem;
}

/* Trust */
.hero-trust {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.8rem;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.trust-avatars {
  display: flex;
}

.trust-avatar {
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
  border: 2px solid var(--bg);
  margin-left: -0.5rem;
}

.trust-avatar:first-child {
  margin-left: 0;
}

.trust-text {
  font-size: 0.85rem;
  color: var(--on-surface-variant);
}

.trust-text strong {
  color: var(--primary);
}

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

/* ========================================
   Stats Section
   ======================================== */
.stats-section {
  padding: 0 2rem;
  margin-top: -2rem;
  position: relative;
  z-index: 10;
}

.stats-container {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(67, 72, 87, 0.15);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(20px);
  box-shadow: var(--glow-primary);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background: rgba(19, 25, 41, 0.8);
  text-align: center;
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(25, 31, 49, 0.9);
}

.stat-icon {
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 0.6rem;
}

.stat-number {
  display: inline;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-suffix {
  display: inline;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--on-surface-variant);
  margin-top: 0.3rem;
}

/* ========================================
   Section Common
   ======================================== */
.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.2rem;
}

.section-tag .material-symbols-outlined {
  font-size: 0.9rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.8rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--on-surface-variant);
  max-width: 500px;
  margin: 0 auto;
}

/* ========================================
   Courses Section
   ======================================== */
.courses-section {
  padding: 6rem 0;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.course-card {
  background: var(--gradient-card);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(67, 72, 87, 0.15);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--glow-primary);
  border-color: rgba(99, 102, 241, 0.2);
}

.course-image {
  position: relative;
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.course-image-bg {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.course-image-bg .material-symbols-outlined {
  font-size: 3.5rem;
  color: rgba(255, 255, 255, 0.8);
}

.course-image-bg.beginner {
  background: linear-gradient(135deg, #1e3a5f, #2563eb);
}

.course-image-bg.intermediate {
  background: linear-gradient(135deg, #3b1564, #7c3aed);
}

.course-image-bg.advanced {
  background: linear-gradient(135deg, #4a1942, #d946ef);
}

.course-image-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.course-card:hover .course-image-img {
  transform: scale(1.08);
}

.course-badge {
  position: absolute;
  top: 0.8rem;
  left: 0.8rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.course-badge.beginner {
  background: rgba(34, 197, 94, 0.2);
  color: #4ade80;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.course-badge.intermediate {
  background: rgba(234, 179, 8, 0.2);
  color: #facc15;
  border: 1px solid rgba(234, 179, 8, 0.3);
}

.course-badge.advanced {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.course-body {
  padding: 1.5rem;
}

.course-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}

.course-desc {
  font-size: 0.85rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.2rem;
  font-size: 0.8rem;
  color: var(--on-surface-variant);
}

.course-meta-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.course-meta-item .material-symbols-outlined {
  font-size: 0.95rem;
  color: var(--primary);
}

.course-rating {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.course-rating .star-filled {
  font-size: 0.95rem;
  color: #facc15;
}

.course-rating-num {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--on-surface);
}

.course-rating-count {
  font-size: 0.75rem;
  color: var(--on-surface-variant);
}

.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid rgba(67, 72, 87, 0.15);
}

.course-price {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.course-price-currency {
  font-size: 0.85rem;
  font-weight: 600;
}

.course-price-original {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--outline);
  text-decoration: line-through;
  margin-right: 0.4rem;
  -webkit-text-fill-color: var(--outline);
  background: none;
}

.btn-enroll {
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: white;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.btn-enroll:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}

.btn-enroll .material-symbols-outlined {
  font-size: 1rem;
}

/* ========================================
   Why Us / Features Section
   ======================================== */
.why-section {
  padding: 6rem 0;
  background: var(--surface-container-low);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.feature-card {
  padding: 2rem;
  background: var(--gradient-card);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(67, 72, 87, 0.15);
  text-align: center;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--glow-primary);
  border-color: rgba(99, 102, 241, 0.2);
}

.feature-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  margin-bottom: 1.2rem;
}

.feature-icon-wrap .material-symbols-outlined {
  font-size: 1.6rem;
  color: white;
}

.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.feature-desc {
  font-size: 0.85rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

/* ========================================
   Testimonials Section
   ======================================== */
.testimonials-section {
  padding: 6rem 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.testimonial-card {
  padding: 2rem;
  background: var(--gradient-card);
  backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(67, 72, 87, 0.15);
  transition: var(--transition);
}

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

.testimonial-stars {
  display: flex;
  gap: 0.15rem;
  margin-bottom: 1rem;
}

.star-filled {
  font-size: 1.1rem;
  color: #facc15;
}

.testimonial-text {
  font-size: 0.9rem;
  color: var(--on-surface-variant);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.author-avatar {
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  color: white;
}

.author-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.author-role {
  font-size: 0.75rem;
  color: var(--on-surface-variant);
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
  position: relative;
  padding: 6rem 2rem;
  overflow: hidden;
  text-align: center;
}

.cta-bg-effects {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cta-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}

.cta-orb-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.25), transparent);
  top: -20%;
  left: 20%;
}

.cta-orb-2 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(217, 70, 239, 0.2), transparent);
  bottom: -20%;
  right: 20%;
}

.cta-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.cta-subtitle {
  font-size: 1rem;
  color: var(--on-surface-variant);
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

/* ========================================
   Contact Section
   ======================================== */
.contact-section {
  padding: 6rem 0;
  background: var(--surface-container-low);
}

.contact-form {
  max-width: 640px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--on-surface);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(67, 72, 87, 0.2);
  color: var(--on-surface);
  font-family: var(--font);
  font-size: 0.9rem;
  transition: var(--transition);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--outline);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  padding: 4rem 0 0;
  background: var(--surface-container);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--on-surface-variant);
  line-height: 1.7;
  margin: 1rem 0 1.5rem;
}

.footer-socials {
  display: flex;
  gap: 0.8rem;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: var(--radius-sm);
  background: var(--surface-container-high);
  color: var(--on-surface-variant);
  transition: var(--transition);
}

.social-link:hover {
  background: var(--gradient-primary);
  color: white;
  transform: translateY(-3px);
}

.social-link svg {
  width: 1.1rem;
  height: 1.1rem;
}

.footer-links-group h4 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}

.footer-links-group a {
  display: block;
  font-size: 0.85rem;
  color: var(--on-surface-variant);
  padding: 0.35rem 0;
  transition: var(--transition);
}

.footer-links-group a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  border-top: 1px solid rgba(67, 72, 87, 0.15);
  font-size: 0.8rem;
  color: var(--outline);
}

/* ========================================
   Modal
   ======================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  width: 100%;
  max-width: 480px;
  background: var(--surface-container-high);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(67, 72, 87, 0.2);
  padding: 2.5rem;
  position: relative;
  transform: translateY(20px) scale(0.95);
  transition: var(--transition);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.5);
}

.modal-overlay.active .modal-content {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--on-surface-variant);
  cursor: pointer;
  padding: 0.3rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--surface-bright);
  color: var(--on-surface);
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.modal-subtitle {
  font-size: 0.9rem;
  color: var(--on-surface-variant);
  margin-bottom: 1.5rem;
}

.modal-form .form-group {
  margin-bottom: 1rem;
}

.modal-form .btn-primary {
  width: 100%;
  justify-content: center;
  margin-top: 0.5rem;
}

/* ========================================
   Toast
   ======================================== */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  background: var(--surface-container-highest);
  border: 1px solid rgba(67, 72, 87, 0.2);
  color: var(--on-surface);
  font-size: 0.9rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  z-index: 3000;
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
  max-width: 350px;
}

.toast.success {
  border-color: rgba(34, 197, 94, 0.3);
}

.toast.error {
  border-color: rgba(239, 68, 68, 0.3);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

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

  .hero-actions {
    justify-content: center;
  }

  .hero-trust {
    justify-content: center;
  }

  .hero-image {
    max-width: 350px;
    margin: 0 auto;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle br {
    display: none;
  }

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

  .courses-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .features-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .floating-code {
    display: none;
  }

  .cta-subtitle br {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-section {
    padding: 6rem 1rem 3rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-outline {
    width: 100%;
    justify-content: center;
  }

  .stats-container {
    grid-template-columns: 1fr 1fr;
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .modal-content {
    padding: 1.8rem;
  }
}

/* ========================================
   Scroll Animations
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Pulse animation for progress orbs */
@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}