/* ============================================
   LINGUAUA — DESIGN SYSTEM
   ============================================ */

:root {
  /* Color System */
  --clr-primary-50:  #eff8ff;
  --clr-primary-100: #dbeffe;
  --clr-primary-200: #bee3fd;
  --clr-primary-300: #91cffb;
  --clr-primary-400: #5db2f8;
  --clr-primary-500: #3691f4;
  --clr-primary-600: #1a6fe9;
  --clr-primary-700: #1456d6;
  --clr-primary-800: #1645ae;
  --clr-primary-900: #183d89;

  --clr-teal-50:  #f0fdfc;
  --clr-teal-100: #ccfbf7;
  --clr-teal-200: #99f5ef;
  --clr-teal-300: #5ee8e2;
  --clr-teal-400: #2dd1cc;
  --clr-teal-500: #14b5b1;
  --clr-teal-600: #0d9490;
  --clr-teal-700: #0f7674;
  --clr-teal-800: #115e5c;
  --clr-teal-900: #134e4d;

  --clr-amber-400: #fbbf24;
  --clr-amber-500: #f59e0b;
  --clr-amber-600: #d97706;

  --clr-green-500: #10b981;
  --clr-green-600: #059669;
  --clr-red-500:   #ef4444;
  --clr-red-600:   #dc2626;

  --clr-neutral-0:   #ffffff;
  --clr-neutral-50:  #f8fafc;
  --clr-neutral-100: #f1f5f9;
  --clr-neutral-200: #e2e8f0;
  --clr-neutral-300: #cbd5e1;
  --clr-neutral-400: #94a3b8;
  --clr-neutral-500: #64748b;
  --clr-neutral-600: #475569;
  --clr-neutral-700: #334155;
  --clr-neutral-800: #1e293b;
  --clr-neutral-900: #0f172a;

  /* Semantic Tokens */
  --color-bg:       var(--clr-neutral-0);
  --color-bg-soft:  var(--clr-neutral-50);
  --color-bg-muted: var(--clr-neutral-100);
  --color-text:     var(--clr-neutral-800);
  --color-text-muted: var(--clr-neutral-500);
  --color-border:   var(--clr-neutral-200);

  /* Typography */
  --font-body:    'Inter', system-ui, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;

  /* Spacing (8px grid) */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;

  /* Radii */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.05);
  --shadow-lg:  0 10px 40px rgba(0,0,0,.1), 0 4px 12px rgba(0,0,0,.06);
  --shadow-xl:  0 20px 60px rgba(0,0,0,.12);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 150ms;
  --dur-base: 250ms;
  --dur-slow: 400ms;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

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

img { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, select, textarea { font: inherit; }

/* ============================================
   UTILITIES
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.gradient-text {
  background: linear-gradient(135deg, var(--clr-primary-600), var(--clr-teal-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.link--teal {
  color: var(--clr-teal-600);
  transition: color var(--dur-fast);
}
.link--teal:hover { color: var(--clr-teal-700); text-decoration: underline; }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  transition: all var(--dur-base) var(--ease-out);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--dur-fast);
}
.btn:hover::after { background: rgba(255,255,255,0.08); }

.btn--primary {
  background: linear-gradient(135deg, var(--clr-primary-600), var(--clr-primary-700));
  color: #fff;
  box-shadow: 0 4px 16px rgba(26, 111, 233, 0.3);
}
.btn--primary:hover {
  box-shadow: 0 6px 24px rgba(26, 111, 233, 0.45);
  transform: translateY(-1px);
}
.btn--primary:active { transform: translateY(0); }

.btn--ghost {
  background: transparent;
  color: var(--clr-neutral-700);
  border: 1.5px solid var(--clr-neutral-300);
}
.btn--ghost:hover { background: var(--clr-neutral-100); border-color: var(--clr-neutral-400); }

.btn--outline {
  background: transparent;
  color: var(--clr-primary-700);
  border: 2px solid var(--clr-primary-200);
}
.btn--outline:hover { background: var(--clr-primary-50); border-color: var(--clr-primary-400); }

.btn--white {
  background: #fff;
  color: var(--clr-primary-700);
  font-weight: 600;
}
.btn--white:hover { background: var(--clr-primary-50); }

.btn--sm  { padding: var(--sp-2) var(--sp-4); font-size: var(--text-xs); }
.btn--lg  { padding: var(--sp-4) var(--sp-8); font-size: var(--text-base); }
.btn--full { width: 100%; justify-content: center; }

.btn--play {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  background: transparent;
  color: var(--clr-neutral-700);
  font-size: var(--text-base);
  font-weight: 500;
  padding: 0;
  border-radius: 0;
}
.btn--play:hover .play-icon { transform: scale(1.1); background: var(--clr-primary-100); }

.play-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--clr-neutral-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary-600);
  transition: all var(--dur-base) var(--ease-out);
  flex-shrink: 0;
}

/* ============================================
   SECTION LAYOUT
   ============================================ */
.section {
  padding: var(--sp-24) 0;
}

.section__header {
  text-align: center;
  margin-bottom: var(--sp-12);
}
.section__header--left { text-align: left; }

.section__eyebrow {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--clr-teal-600);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-3);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 800;
  line-height: 1.15;
  color: var(--clr-neutral-900);
  margin-bottom: var(--sp-4);
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ============================================
   HEADER / NAV
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--sp-4) 0;
  transition: all var(--dur-base) var(--ease-in-out);
}

.header.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  padding: var(--sp-3) 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--clr-primary-600), var(--clr-teal-500));
  color: #fff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
}
.logo-text {
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--clr-neutral-800);
}
.logo-text strong { color: var(--clr-primary-700); font-weight: 800; }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  margin: 0 auto;
}
.nav__link {
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--clr-neutral-600);
  transition: all var(--dur-fast);
}
.nav__link:hover, .nav__link.active {
  color: var(--clr-primary-700);
  background: var(--clr-primary-50);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
  margin-left: auto;
}
.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-neutral-700);
  border-radius: 2px;
  transition: all var(--dur-base) var(--ease-out);
}
.nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  overflow: hidden;
  background: linear-gradient(160deg, var(--clr-primary-50) 0%, var(--clr-teal-50) 40%, #fff 80%);
}

.hero__bg-shapes { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.shape {
  position: absolute;
  border-radius: var(--radius-full);
  opacity: 0.35;
  filter: blur(60px);
}
.shape--1 {
  width: 500px; height: 500px;
  background: var(--clr-primary-200);
  top: -150px; right: -100px;
  animation: floatA 12s ease-in-out infinite;
}
.shape--2 {
  width: 350px; height: 350px;
  background: var(--clr-teal-200);
  bottom: -50px; left: 20%;
  animation: floatB 15s ease-in-out infinite;
}
.shape--3 {
  width: 250px; height: 250px;
  background: var(--clr-amber-400);
  top: 40%; left: -80px;
  opacity: 0.2;
  animation: floatA 18s ease-in-out infinite reverse;
}

@keyframes floatA {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}
@keyframes floatB {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: center;
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-16);
}

.hero__content { max-width: 560px; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  background: rgba(255,255,255,0.8);
  border: 1px solid var(--clr-primary-200);
  border-radius: var(--radius-full);
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--clr-primary-700);
  margin-bottom: var(--sp-6);
  backdrop-filter: blur(8px);
  animation: fadeSlideDown 0.6s var(--ease-out) forwards;
}
.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--clr-green-500);
  border-radius: var(--radius-full);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.4); }
  50% { box-shadow: 0 0 0 6px rgba(16,185,129,0); }
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-6xl);
  font-weight: 800;
  line-height: 1.1;
  color: var(--clr-neutral-900);
  margin-bottom: var(--sp-6);
  animation: fadeSlideUp 0.7s var(--ease-out) 0.1s both;
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--clr-neutral-600);
  line-height: 1.65;
  margin-bottom: var(--sp-8);
  animation: fadeSlideUp 0.7s var(--ease-out) 0.2s both;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  flex-wrap: wrap;
  margin-bottom: var(--sp-10);
  animation: fadeSlideUp 0.7s var(--ease-out) 0.3s both;
}

.hero__trust {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  animation: fadeSlideUp 0.7s var(--ease-out) 0.4s both;
}
.trust-avatars {
  display: flex;
}
.trust-avatars img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 2px solid #fff;
  object-fit: cover;
  margin-left: -8px;
}
.trust-avatars img:first-child { margin-left: 0; }

.trust-stars { color: var(--clr-amber-500); font-size: var(--text-sm); margin-bottom: 2px; }
.trust-text span { font-size: var(--text-sm); color: var(--clr-neutral-600); }

/* Lesson Card */
.hero__visual {
  position: relative;
  animation: fadeSlideUp 0.8s var(--ease-out) 0.3s both;
}

.lesson-card {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--clr-neutral-100);
}
.lesson-card__header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-5) var(--sp-5) var(--sp-4);
  background: linear-gradient(135deg, var(--clr-primary-600), var(--clr-primary-800));
  color: #fff;
}
.lesson-card__avatar {
  position: relative;
  flex-shrink: 0;
}
.lesson-card__avatar img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 2px solid rgba(255,255,255,0.4);
  object-fit: cover;
}
.online-dot {
  position: absolute;
  bottom: 2px; right: 2px;
  width: 10px; height: 10px;
  background: var(--clr-green-500);
  border-radius: var(--radius-full);
  border: 2px solid #fff;
}
.lesson-card__teacher { font-weight: 600; font-size: var(--text-sm); }
.lesson-card__subject { font-size: var(--text-xs); opacity: 0.8; }
.lesson-card__live {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  background: rgba(255,255,255,0.2);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.live-dot {
  width: 6px; height: 6px;
  background: #ff4444;
  border-radius: var(--radius-full);
  animation: pulse 1.5s infinite;
}

.lesson-card__body { padding: var(--sp-5); }
.lesson-card__title {
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--sp-4);
  color: var(--clr-neutral-800);
}

.lesson-tabs {
  display: flex;
  gap: var(--sp-1);
  background: var(--clr-neutral-100);
  border-radius: var(--radius-md);
  padding: 3px;
  margin-bottom: var(--sp-4);
}
.lesson-tab {
  flex: 1;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--clr-neutral-500);
  transition: all var(--dur-fast);
}
.lesson-tab.active {
  background: #fff;
  color: var(--clr-primary-700);
  box-shadow: var(--shadow-sm);
}

.lesson-content { min-height: 80px; }
.vocab-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--sp-1);
  background: var(--clr-primary-50);
  font-size: var(--text-sm);
  animation: fadeIn 0.3s ease both;
}
.vocab-item:nth-child(1) { animation-delay: 0ms; }
.vocab-item:nth-child(2) { animation-delay: 50ms; }
.vocab-item:nth-child(3) { animation-delay: 100ms; }
.word { font-weight: 600; color: var(--clr-primary-700); }
.translation { color: var(--clr-neutral-600); font-size: var(--text-xs); }

.grammar-content, .speaking-content {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  font-size: var(--text-sm);
  color: var(--clr-neutral-700);
  animation: fadeIn 0.3s ease both;
}
.grammar-rule {
  padding: var(--sp-2) var(--sp-3);
  background: var(--clr-teal-50);
  border-left: 3px solid var(--clr-teal-400);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--text-sm);
  line-height: 1.5;
}
.speaking-prompt {
  padding: var(--sp-2) var(--sp-3);
  background: var(--clr-amber-400);
  background: linear-gradient(135deg, #fff7ed, #fef3c7);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--clr-neutral-700);
}

.lesson-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-5);
  border-top: 1px solid var(--clr-neutral-100);
  background: var(--clr-neutral-50);
}
.lesson-participants {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-sm);
  color: var(--clr-neutral-500);
}

/* Floating Badges */
.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--sp-3) var(--sp-4);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--clr-neutral-100);
  font-size: var(--text-sm);
}
.floating-badge strong { display: block; font-size: var(--text-sm); font-weight: 700; }
.floating-badge span { font-size: var(--text-xs); color: var(--clr-neutral-500); }
.badge-icon { font-size: 1.5rem; }

.badge--streak { bottom: -24px; left: -32px; animation: floatB 6s ease-in-out infinite; }
.badge--cert   { top: -24px; right: -24px; animation: floatA 8s ease-in-out infinite; }

/* ============================================
   STATS
   ============================================ */
.stats {
  background: var(--clr-primary-700);
  padding: var(--sp-12) 0;
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-8);
  text-align: center;
}
.stat-item { color: #fff; }
.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--sp-2);
}
.stat-label { font-size: var(--text-sm); color: rgba(255,255,255,0.75); }

/* ============================================
   COURSES
   ============================================ */
.courses { background: var(--clr-neutral-50); }

.course-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  justify-content: center;
  margin-bottom: var(--sp-10);
}
.filter-btn {
  padding: var(--sp-2) var(--sp-5);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--clr-neutral-600);
  background: #fff;
  border: 1.5px solid var(--clr-neutral-200);
  transition: all var(--dur-base);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--clr-primary-600);
  color: #fff;
  border-color: var(--clr-primary-600);
}

.courses__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}

.course-card {
  background: #fff;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--clr-neutral-100);
  transition: all var(--dur-slow) var(--ease-out);
  display: flex;
  flex-direction: column;
}
.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--clr-primary-100);
}
.course-card.hidden { display: none; }

.course-card__image {
  position: relative;
  overflow: hidden;
  height: 180px;
}
.course-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}
.course-card:hover .course-card__image img { transform: scale(1.05); }

.course-card__badge {
  position: absolute;
  top: var(--sp-3);
  left: var(--sp-3);
  background: var(--clr-primary-600);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}
.course-card__badge.badge--new { background: var(--clr-green-500); }
.course-card__badge.badge--hot { background: var(--clr-amber-500); }

.course-card__level {
  position: absolute;
  top: var(--sp-3);
  right: var(--sp-3);
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  backdrop-filter: blur(4px);
}

.course-card__body {
  padding: var(--sp-5);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.course-card__flag { font-size: 1.5rem; margin-bottom: var(--sp-3); }
.course-card__title {
  font-weight: 700;
  font-size: var(--text-lg);
  margin-bottom: var(--sp-2);
  color: var(--clr-neutral-900);
}
.course-card__desc {
  font-size: var(--text-sm);
  color: var(--clr-neutral-500);
  line-height: 1.6;
  margin-bottom: var(--sp-4);
  flex: 1;
}
.course-card__meta {
  display: flex;
  gap: var(--sp-4);
  font-size: var(--text-xs);
  color: var(--clr-neutral-500);
  margin-bottom: var(--sp-4);
}
.course-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--sp-4);
  border-top: 1px solid var(--clr-neutral-100);
}
.course-card__price { display: flex; align-items: baseline; gap: var(--sp-1); }
.price-from { font-size: var(--text-xs); color: var(--clr-neutral-400); }
.price-amount { font-size: var(--text-xl); font-weight: 800; color: var(--clr-primary-700); }
.price-period { font-size: var(--text-xs); color: var(--clr-neutral-400); }

.courses__cta { text-align: center; margin-top: var(--sp-10); }

/* ============================================
   HOW IT WORKS
   ============================================ */
.how-it-works {
  background: linear-gradient(160deg, #fff 0%, var(--clr-primary-50) 100%);
}
.steps__grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: var(--sp-4);
}
.step-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  border: 1px solid var(--clr-neutral-100);
  text-align: center;
  transition: all var(--dur-slow) var(--ease-out);
  position: relative;
}
.step-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.step-number {
  position: absolute;
  top: var(--sp-4);
  left: var(--sp-4);
  font-size: var(--text-xs);
  font-weight: 800;
  color: var(--clr-primary-200);
  font-family: var(--font-display);
}
.step-icon { font-size: 2.5rem; margin-bottom: var(--sp-4); }
.step-card h3 { font-weight: 700; font-size: var(--text-lg); margin-bottom: var(--sp-3); }
.step-card p { font-size: var(--text-sm); color: var(--clr-neutral-500); line-height: 1.6; }

.step-divider {
  width: 64px;
  height: 2px;
  background: linear-gradient(to right, var(--clr-primary-200), var(--clr-teal-300));
  border-radius: 2px;
  position: relative;
}
.step-divider::after {
  content: '→';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--clr-primary-50);
  color: var(--clr-primary-400);
  font-size: var(--text-sm);
  padding: 0 var(--sp-2);
}

/* ============================================
   TEACHERS
   ============================================ */
.teachers { background: #fff; }
.teachers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
}
.teacher-card {
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--clr-neutral-100);
  background: #fff;
  transition: all var(--dur-slow) var(--ease-out);
}
.teacher-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }

.teacher-card__image-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.teacher-card__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}
.teacher-card:hover .teacher-card__image-wrap img { transform: scale(1.06); }

.teacher-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(26,58,92,0.8) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: var(--sp-4);
  opacity: 0;
  transition: opacity var(--dur-base);
}
.teacher-card:hover .teacher-card__overlay { opacity: 1; }

.teacher-card__body { padding: var(--sp-4); }
.teacher-card__name { font-weight: 700; font-size: var(--text-base); margin-bottom: var(--sp-1); }
.teacher-card__subject {
  display: inline-block;
  font-size: var(--text-xs);
  color: var(--clr-teal-600);
  font-weight: 600;
  margin-bottom: var(--sp-3);
}
.teacher-card__tags { display: flex; flex-wrap: wrap; gap: var(--sp-1); margin-bottom: var(--sp-3); }
.tag {
  font-size: 11px;
  font-weight: 500;
  color: var(--clr-primary-700);
  background: var(--clr-primary-50);
  border: 1px solid var(--clr-primary-100);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.teacher-card__stats { display: flex; justify-content: space-between; padding-top: var(--sp-3); border-top: 1px solid var(--clr-neutral-100); }
.t-stat { text-align: center; }
.t-stat strong { display: block; font-size: var(--text-sm); font-weight: 700; color: var(--clr-neutral-800); }
.t-stat span { font-size: 11px; color: var(--clr-neutral-400); }

.teachers__cta { text-align: center; margin-top: var(--sp-10); }

/* ============================================
   TESTIMONIALS
   ============================================ */
.testimonials { background: var(--clr-neutral-900); }
.testimonials .section__eyebrow { color: var(--clr-teal-400); }
.testimonials .section__title { color: #fff; }

.testimonials__slider { overflow: hidden; }
.testimonials__track {
  display: flex;
  gap: var(--sp-6);
  transition: transform 0.5s var(--ease-out);
}

.testimonial-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  flex: 0 0 calc(33.333% - var(--sp-4));
  position: relative;
}
.testimonial-card__quote {
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--clr-primary-400);
  line-height: 0.6;
  margin-bottom: var(--sp-4);
  display: block;
  opacity: 0.5;
}
.testimonial-card__text {
  color: rgba(255,255,255,0.85);
  line-height: 1.7;
  font-size: var(--text-base);
  margin-bottom: var(--sp-6);
}
.testimonial-card__footer {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.testimonial-card__footer img {
  width: 44px; height: 44px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid rgba(255,255,255,0.2);
}
.testimonial-card__footer strong {
  display: block;
  color: #fff;
  font-weight: 600;
  font-size: var(--text-sm);
}
.testimonial-card__footer span {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
}
.testimonial-stars { margin-left: auto; color: var(--clr-amber-400); font-size: var(--text-sm); }

.testimonials__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-5);
  margin-top: var(--sp-10);
}
.slider-btn {
  width: 44px; height: 44px;
  border-radius: var(--radius-full);
  border: 1.5px solid rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  transition: all var(--dur-base);
}
.slider-btn:hover {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border-color: rgba(255,255,255,0.4);
}
.slider-dots { display: flex; gap: var(--sp-2); }
.slider-dot {
  width: 8px; height: 8px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.3);
  transition: all var(--dur-base);
}
.slider-dot.active {
  background: #fff;
  width: 24px;
}

/* ============================================
   BLOG
   ============================================ */
.blog { background: var(--clr-neutral-50); }
.blog__grid {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: var(--sp-8);
  align-items: start;
}

.blog-card--featured {
  background: #fff;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--clr-neutral-100);
  transition: all var(--dur-slow) var(--ease-out);
}
.blog-card--featured:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }

.blog-card--featured .blog-card__image {
  position: relative;
  height: 280px;
  overflow: hidden;
}
.blog-card--featured .blog-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}
.blog-card--featured:hover .blog-card__image img { transform: scale(1.04); }

.blog-card__category {
  position: absolute;
  top: var(--sp-3);
  left: var(--sp-3);
  background: var(--clr-primary-600);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}
.blog-card--featured .blog-card__body { padding: var(--sp-6); }
.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-xs);
  color: var(--clr-neutral-500);
  margin-bottom: var(--sp-3);
}
.blog-card__meta img {
  width: 24px; height: 24px;
  border-radius: var(--radius-full);
  object-fit: cover;
}
.dot { color: var(--clr-neutral-300); }
.blog-card__body h3 { font-weight: 700; font-size: var(--text-xl); line-height: 1.4; margin-bottom: var(--sp-3); }
.blog-card__body h3 a { color: var(--clr-neutral-900); transition: color var(--dur-fast); }
.blog-card__body h3 a:hover { color: var(--clr-primary-700); }
.blog-card__body p { font-size: var(--text-sm); color: var(--clr-neutral-500); line-height: 1.6; margin-bottom: var(--sp-4); }
.blog-card__link { font-size: var(--text-sm); font-weight: 600; color: var(--clr-primary-600); transition: color var(--dur-fast); }
.blog-card__link:hover { color: var(--clr-primary-800); }

.blog__side { display: flex; flex-direction: column; gap: var(--sp-4); }
.blog-card--mini {
  display: grid;
  grid-template-columns: 140px 1fr;
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--clr-neutral-100);
  transition: all var(--dur-slow) var(--ease-out);
}
.blog-card--mini:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }
.blog-card--mini .blog-card__image { position: relative; overflow: hidden; }
.blog-card--mini .blog-card__image img { width: 100%; height: 100%; object-fit: cover; }
.blog-card--mini .blog-card__body { padding: var(--sp-4); }
.blog-card--mini h3 { font-size: var(--text-sm); line-height: 1.4; margin-bottom: var(--sp-2); }

.blog__cta { text-align: center; margin-top: var(--sp-10); }

/* ============================================
   FAQ
   ============================================ */
.faq { background: #fff; }
.faq__inner {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--sp-16);
  align-items: start;
}
.faq__list { display: flex; flex-direction: column; gap: var(--sp-3); }
.faq-item {
  border: 1px solid var(--clr-neutral-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--dur-fast);
}
.faq-item.open {
  border-color: var(--clr-primary-200);
  box-shadow: 0 0 0 3px var(--clr-primary-50);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-5);
  text-align: left;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--clr-neutral-800);
  background: #fff;
  transition: background var(--dur-fast);
}
.faq-question:hover { background: var(--clr-neutral-50); }
.faq-item.open .faq-question { color: var(--clr-primary-700); }

.faq-icon {
  flex-shrink: 0;
  color: var(--clr-neutral-400);
  transition: transform var(--dur-base) var(--ease-out);
}
.faq-item.open .faq-icon { transform: rotate(180deg); color: var(--clr-primary-500); }

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-slow) var(--ease-out);
}
.faq-item.open .faq-answer { grid-template-rows: 1fr; }
.faq-answer > p {
  overflow: hidden;
  padding: 0 var(--sp-5) var(--sp-5);
  font-size: var(--text-sm);
  color: var(--clr-neutral-600);
  line-height: 1.7;
}

/* ============================================
   REGISTER
   ============================================ */
.register {
  background: linear-gradient(160deg, var(--clr-primary-50) 0%, var(--clr-teal-50) 50%, #fff 100%);
}
.register__inner {
  display: grid;
  grid-template-columns: 1fr 480px;
  gap: var(--sp-16);
  align-items: center;
}
.register__title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 800;
  line-height: 1.2;
  color: var(--clr-neutral-900);
  margin-bottom: var(--sp-4);
  margin-top: var(--sp-3);
}
.register__subtitle {
  color: var(--clr-neutral-600);
  font-size: var(--text-lg);
  line-height: 1.6;
  margin-bottom: var(--sp-8);
}
.register__benefits {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.register__benefits li {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--text-base);
  color: var(--clr-neutral-700);
}
.register__benefits svg { color: var(--clr-green-500); flex-shrink: 0; }

/* Form */
.register-form {
  background: #fff;
  border-radius: var(--radius-2xl);
  padding: var(--sp-8);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--clr-neutral-100);
}
.form-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: var(--sp-6);
  color: var(--clr-neutral-900);
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
.form-group { display: flex; flex-direction: column; gap: var(--sp-2); margin-bottom: var(--sp-5); }
.form-group label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--clr-neutral-700);
}
.form-group input,
.form-group select {
  padding: var(--sp-3) var(--sp-4);
  border: 1.5px solid var(--clr-neutral-200);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--clr-neutral-800);
  background: #fff;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.form-group input::placeholder { color: var(--clr-neutral-400); }
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--clr-primary-400);
  box-shadow: 0 0 0 3px var(--clr-primary-100);
}
.form-group input.error { border-color: var(--clr-red-500); }
.form-group input.error:focus { box-shadow: 0 0 0 3px rgba(239,68,68,0.1); }

.select-wrap { position: relative; }
.select-wrap select { width: 100%; appearance: none; padding-right: var(--sp-10); cursor: pointer; }
.select-arrow {
  position: absolute;
  right: var(--sp-4);
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--clr-neutral-400);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--clr-red-500);
  min-height: 16px;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--clr-neutral-600);
  line-height: 1.5;
}
.checkbox-label input[type="checkbox"] { display: none; }
.checkbox-custom {
  width: 18px;
  height: 18px;
  border: 2px solid var(--clr-neutral-300);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: all var(--dur-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}
.checkbox-label input:checked + .checkbox-custom {
  background: var(--clr-primary-600);
  border-color: var(--clr-primary-600);
}
.checkbox-label input:checked + .checkbox-custom::after {
  content: '✓';
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.form-success {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  background: var(--clr-green-500);
  color: #fff;
  border-radius: var(--radius-md);
  padding: var(--sp-4);
  margin-top: var(--sp-4);
  font-size: var(--text-sm);
  font-weight: 500;
}
.form-success svg { flex-shrink: 0; }

/* ============================================
   FOOTER
   ============================================ */
.footer { background: var(--clr-neutral-900); color: rgba(255,255,255,0.7); }

.footer__top { padding: var(--sp-16) 0 var(--sp-12); border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer__top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--sp-10);
}

.footer__brand .nav__logo { margin-bottom: var(--sp-4); }
.footer__logo .logo-text { color: #fff; }
.footer__logo .logo-text strong { color: var(--clr-teal-400); }
.footer__brand p { font-size: var(--text-sm); line-height: 1.7; max-width: 280px; }

.footer__social { display: flex; gap: var(--sp-3); margin-top: var(--sp-5); }
.social-link {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  transition: all var(--dur-base);
}
.social-link:hover {
  background: var(--clr-primary-600);
  border-color: var(--clr-primary-600);
  color: #fff;
  transform: translateY(-2px);
}

.footer__col h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}
.footer__col ul { display: flex; flex-direction: column; gap: var(--sp-3); }
.footer__col ul a {
  font-size: var(--text-sm);
  transition: color var(--dur-fast);
}
.footer__col ul a:hover { color: var(--clr-teal-400); }

.footer__contact { margin-top: var(--sp-6); }
.footer__contact h4 { margin-bottom: var(--sp-3); }
.footer__contact a, .footer__contact p {
  display: block;
  font-size: var(--text-sm);
  margin-bottom: var(--sp-2);
  transition: color var(--dur-fast);
}
.footer__contact a:hover { color: var(--clr-teal-400); }

.footer__bottom {
  padding: var(--sp-5) 0;
}
.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  flex-wrap: wrap;
}
.footer__bottom p { font-size: var(--text-sm); }
.footer__legal { display: flex; gap: var(--sp-6); }
.footer__legal a { font-size: var(--text-sm); transition: color var(--dur-fast); }
.footer__legal a:hover { color: var(--clr-teal-400); text-decoration: underline; }

.footer__lang { display: flex; gap: var(--sp-1); }
.lang-btn {
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 700;
  color: rgba(255,255,255,0.6);
  border: 1px solid rgba(255,255,255,0.15);
  transition: all var(--dur-fast);
}
.lang-btn.active, .lang-btn:hover {
  background: var(--clr-primary-600);
  border-color: var(--clr-primary-600);
  color: #fff;
}

/* ============================================
   MODAL
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-6);
}
.modal[hidden] { display: none; }

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(4px);
  animation: fadeIn var(--dur-base) ease;
}
.modal__content {
  position: relative;
  background: #fff;
  border-radius: var(--radius-2xl);
  animation: slideUp var(--dur-slow) var(--ease-out);
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.modal__content--video {
  width: 100%;
  max-width: 800px;
  aspect-ratio: 16/9;
  background: var(--clr-neutral-900);
}
.modal__content--policy {
  width: 100%;
  max-width: 640px;
  overflow-y: auto;
}
.modal__close {
  position: sticky;
  top: var(--sp-4);
  left: 100%;
  float: right;
  width: 36px; height: 36px;
  border-radius: var(--radius-full);
  background: var(--clr-neutral-100);
  color: var(--clr-neutral-600);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--dur-fast);
  z-index: 1;
  margin: var(--sp-4) var(--sp-4) 0 0;
}
.modal__close:hover { background: var(--clr-neutral-200); color: var(--clr-neutral-900); }

.modal__content h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--clr-neutral-900);
  padding: var(--sp-4) var(--sp-8) var(--sp-4);
}
.policy-content { padding: 0 var(--sp-8) var(--sp-8); }
.policy-content h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--clr-neutral-800);
  margin: var(--sp-5) 0 var(--sp-2);
}
.policy-content p { font-size: var(--text-sm); color: var(--clr-neutral-600); line-height: 1.7; margin-bottom: var(--sp-3); }

.video-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  gap: var(--sp-3);
}
.video-play-icon {
  width: 72px; height: 72px;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
}
.video-placeholder p { font-size: var(--text-xl); font-weight: 600; color: #fff; }
.video-placeholder span { font-size: var(--text-sm); }

/* ============================================
   COOKIE BANNER
   ============================================ */
.cookie-banner {
  position: fixed;
  bottom: var(--sp-5);
  left: 50%;
  transform: translateX(-50%);
  z-index: 150;
  background: var(--clr-neutral-900);
  color: rgba(255,255,255,0.85);
  border-radius: var(--radius-xl);
  padding: var(--sp-4) var(--sp-6);
  box-shadow: var(--shadow-xl);
  max-width: 560px;
  width: calc(100% - var(--sp-10));
  border: 1px solid rgba(255,255,255,0.1);
  animation: slideUp var(--dur-slow) var(--ease-out);
}
.cookie-banner.hidden { display: none; }
.cookie-banner__content {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  flex-wrap: wrap;
}
.cookie-banner__content p { font-size: var(--text-sm); flex: 1; min-width: 200px; }
.cookie-banner__actions { display: flex; gap: var(--sp-2); }

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1100px) {
  .hero__title { font-size: var(--text-5xl); }
  .teachers__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__top-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-8); }
  .footer__brand { grid-column: 1/-1; }
}

@media (max-width: 900px) {
  .section { padding: var(--sp-16) 0; }
  .section__title { font-size: var(--text-3xl); }
  .hero__inner { grid-template-columns: 1fr; gap: var(--sp-12); }
  .hero__content { max-width: 100%; text-align: center; }
  .hero__title { font-size: var(--text-4xl); }
  .hero__actions { justify-content: center; }
  .hero__trust { justify-content: center; }
  .hero__visual { max-width: 500px; margin: 0 auto; }
  .badge--streak { display: none; }
  .badge--cert { display: none; }

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

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

  .steps__grid {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
  }
  .step-divider { display: none; }

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

  .faq__inner { grid-template-columns: 1fr; gap: var(--sp-8); }
  .register__inner { grid-template-columns: 1fr; gap: var(--sp-10); }
  .register__form-wrap { max-width: 480px; }

  .testimonials__track { gap: var(--sp-4); }
  .testimonial-card { flex: 0 0 calc(50% - var(--sp-2)); }
}

@media (max-width: 768px) {
  .nav__links, .nav__actions {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--sp-5);
    z-index: 99;
  }
  .nav__links.open, .nav__actions.open { display: flex; }
  .nav__links { padding-bottom: var(--sp-20); }
  .nav__link { font-size: var(--text-xl); }
  .nav__actions {
    position: static;
    display: flex;
    flex-direction: row;
    background: transparent;
    backdrop-filter: none;
    z-index: auto;
    padding-bottom: 0;
  }
  .nav__burger { display: flex; z-index: 100; }

  .hero__title { font-size: var(--text-3xl); }
  .courses__grid { grid-template-columns: 1fr; }
  .teachers__grid { grid-template-columns: 1fr; max-width: 340px; margin: 0 auto; }
  .testimonial-card { flex: 0 0 100%; }
  .blog__side { grid-template-columns: 1fr; }
  .blog-card--mini { grid-template-columns: 1fr; }
  .footer__top-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer__bottom-inner { flex-direction: column; align-items: flex-start; gap: var(--sp-3); }
  .footer__legal { flex-wrap: wrap; gap: var(--sp-3); }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--sp-4); }
  .hero__title { font-size: var(--text-2xl); }
  .hero__actions { flex-direction: column; width: 100%; }
  .hero__actions .btn { width: 100%; justify-content: center; }
  .stats__grid { grid-template-columns: 1fr 1fr; gap: var(--sp-5); }
  .section__title { font-size: var(--text-2xl); }
  .register__title { font-size: var(--text-2xl); }
  .register-form { padding: var(--sp-6); }
  .cookie-banner__content { flex-direction: column; align-items: flex-start; gap: var(--sp-4); }
}