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

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

:root {
  --indigo:    #1B1F5E;
  --indigo-d:  #13163F;
  --amber:     #F5A623;
  --amber-l:   #FFC55A;
  --sky:       #E8F4F8;
  --sky-d:     #C8E6F0;
  --white:     #FFFFFF;
  --ink:       #2D2D2D;
  --ink-m:     #5A5A72;
  --ink-l:     #9090A8;
  --border:    #DDE4EF;
  --radius:    12px;
  --radius-l:  20px;
  --shadow:    0 4px 24px rgba(27,31,94,.10);
  --shadow-m:  0 8px 40px rgba(27,31,94,.15);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  font-family: 'Unbounded', sans-serif;
  line-height: 1.2;
  color: var(--indigo);
}

/* ── Utility ──────────────────────────────────────── */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: transform .18s, box-shadow .18s, background .18s;
  border: none;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--amber);
  color: var(--indigo);
  box-shadow: 0 4px 16px rgba(245,166,35,.35);
}
.btn-primary:hover { background: var(--amber-l); box-shadow: 0 8px 24px rgba(245,166,35,.45); }

.btn-outline {
  background: transparent;
  border: 2px solid var(--white);
  color: var(--white);
}
.btn-outline:hover { background: rgba(255,255,255,.1); }

.btn-dark {
  background: var(--indigo);
  color: var(--white);
}
.btn-dark:hover { background: var(--indigo-d); }

.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.tag-amber { background: rgba(245,166,35,.15); color: #B8780F; }
.tag-indigo { background: rgba(27,31,94,.1); color: var(--indigo); }

/* ── Header / Nav ─────────────────────────────────── */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(27,31,94,.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

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

.logo-img { width: 40px; height: 40px; }

.logo-text {
  font-family: 'Unbounded', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--white);
  letter-spacing: -.01em;
}
.logo-text span { color: var(--amber); }

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,.75);
  font-size: .9rem;
  font-weight: 500;
  transition: color .18s;
}
.nav-links a:hover { color: var(--white); }

.nav-cta .btn { padding: 10px 24px; font-size: .88rem; }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  background: var(--indigo-d);
  padding: 20px 24px 28px;
  gap: 20px;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  color: rgba(255,255,255,.8);
  font-weight: 500;
  font-size: 1rem;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.nav-mobile a:hover { color: var(--amber); }

/* ── Hero ─────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--indigo-d) 0%, var(--indigo) 60%, #2A307A 100%);
  display: flex;
  align-items: center;
  padding-top: 72px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(245,166,35,.18) 0%, transparent 70%);
  top: -100px; right: -100px;
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(200,230,240,.1) 0%, transparent 70%);
  bottom: -80px; left: 10%;
  border-radius: 50%;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 80px 0;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--amber);
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero-eyebrow::before {
  content: '';
  width: 28px; height: 2px;
  background: var(--amber);
  border-radius: 2px;
}

.hero-title {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -.02em;
  margin-bottom: 24px;
}
.hero-title em {
  font-style: normal;
  color: var(--amber);
  display: block;
}

.hero-desc {
  color: rgba(255,255,255,.72);
  font-size: 1.05rem;
  margin-bottom: 40px;
  max-width: 480px;
  line-height: 1.7;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 36px;
  margin-top: 52px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,.12);
}

.hero-stat-num {
  font-family: 'Unbounded', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--amber);
  line-height: 1;
}

.hero-stat-lbl {
  font-size: .82rem;
  color: rgba(255,255,255,.55);
  margin-top: 4px;
}

.hero-visual {
  position: relative;
}

.hero-img-wrap {
  border-radius: var(--radius-l);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.hero-badge {
  position: absolute;
  bottom: -16px; left: -20px;
  background: var(--white);
  border-radius: var(--radius);
  padding: 14px 20px;
  box-shadow: var(--shadow-m);
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-badge-icon {
  width: 42px; height: 42px;
  background: rgba(245,166,35,.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.hero-badge-txt strong {
  display: block;
  font-size: .9rem;
  color: var(--indigo);
  font-weight: 700;
}
.hero-badge-txt span { font-size: .77rem; color: var(--ink-m); }

/* ── Ticker / Marquee ─────────────────────────────── */
.ticker {
  background: var(--amber);
  padding: 14px 0;
  overflow: hidden;
  white-space: nowrap;
}

.ticker-inner {
  display: inline-flex;
  animation: marquee 30s linear infinite;
}

.ticker-item {
  font-family: 'Unbounded', sans-serif;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--indigo);
  padding: 0 40px;
  text-transform: uppercase;
}
.ticker-item::before { content: '◆ '; }

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ── Section ──────────────────────────────────────── */
.section { padding: 96px 0; }
.section-sky { background: var(--sky); }
.section-white { background: var(--white); }
.section-dark { background: var(--indigo); }

.section-head { text-align: center; max-width: 680px; margin: 0 auto 60px; }

.section-eyebrow {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 14px;
}

.section-title { font-size: clamp(1.7rem, 3vw, 2.5rem); margin-bottom: 16px; }
.section-desc { color: var(--ink-m); font-size: 1rem; line-height: 1.7; }

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

.feature-card {
  background: var(--white);
  border-radius: var(--radius-l);
  padding: 36px 32px;
  border: 1px solid var(--border);
  transition: box-shadow .2s, transform .2s;
}

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

.feature-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--indigo), #3A4099);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 24px;
}

.feature-title {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--indigo);
}

.feature-text { font-size: .93rem; color: var(--ink-m); line-height: 1.65; }

/* ── Courses ──────────────────────────────────────── */
.courses-filter {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 22px;
  border-radius: 24px;
  border: 2px solid var(--border);
  background: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: .88rem;
  font-weight: 600;
  color: var(--ink-m);
  cursor: pointer;
  transition: all .18s;
}
.filter-btn:hover, .filter-btn.active {
  border-color: var(--indigo);
  background: var(--indigo);
  color: var(--white);
}

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

.course-card {
  background: var(--white);
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: box-shadow .2s, transform .2s;
  display: flex;
  flex-direction: column;
}
.course-card:hover { box-shadow: var(--shadow-m); transform: translateY(-4px); }

.course-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--sky-d);
  position: relative;
}

.course-img img { width: 100%; height: 100%; object-fit: cover; }
.course-img .img-placeholder {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sky-d);
  color: var(--ink-l);
  font-size: .82rem;
  font-style: italic;
  text-align: center;
  padding: 12px;
}

.course-badge {
  position: absolute;
  top: 12px; left: 12px;
}

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

.course-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
}

.course-meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: .8rem;
  color: var(--ink-m);
}

.course-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--indigo);
}

.course-desc { font-size: .88rem; color: var(--ink-m); line-height: 1.6; margin-bottom: 20px; flex: 1; }

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

.course-price {
  font-family: 'Unbounded', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--indigo);
}

.course-price small {
  font-size: .72rem;
  font-weight: 400;
  color: var(--ink-l);
  display: block;
  font-family: 'Inter', sans-serif;
}

/* ── Stats Banner ─────────────────────────────────── */
.stats-banner {
  background: linear-gradient(135deg, var(--indigo-d), var(--indigo));
  border-radius: var(--radius-l);
  padding: 64px 60px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stats-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.stat-item { position: relative; z-index: 1; }

.stat-num {
  font-family: 'Unbounded', sans-serif;
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--amber);
  line-height: 1;
  display: block;
}

.stat-label {
  font-size: .88rem;
  color: rgba(255,255,255,.65);
  margin-top: 8px;
  line-height: 1.4;
}

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

.testimonial-card {
  background: var(--white);
  border-radius: var(--radius-l);
  padding: 32px 28px;
  border: 1px solid var(--border);
  transition: box-shadow .2s;
}
.testimonial-card:hover { box-shadow: var(--shadow); }

.testimonial-stars {
  color: var(--amber);
  font-size: 1rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: .93rem;
  color: var(--ink);
  line-height: 1.7;
  margin-bottom: 24px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-ava {
  width: 44px; height: 44px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--sky-d);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .95rem;
  color: var(--indigo);
}

.author-name {
  font-weight: 700;
  font-size: .9rem;
  color: var(--indigo);
}
.author-role { font-size: .8rem; color: var(--ink-m); }

/* ── Team ─────────────────────────────────────────── */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.team-card {
  text-align: center;
  background: var(--white);
  border-radius: var(--radius-l);
  padding: 32px 20px;
  border: 1px solid var(--border);
  transition: box-shadow .2s, transform .2s;
}
.team-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }

.team-photo {
  width: 100px; height: 100px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 20px;
  background: var(--sky-d);
  border: 3px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-l);
  font-size: .72rem;
  font-style: italic;
  text-align: center;
  padding: 8px;
}
.team-photo img { width: 100%; height: 100%; object-fit: cover; }

.team-name { font-size: 1rem; font-weight: 700; color: var(--indigo); margin-bottom: 4px; }
.team-role { font-size: .83rem; color: var(--ink-m); }

/* ── FAQ ──────────────────────────────────────────── */
.faq-list { max-width: 760px; margin: 0 auto; }

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  text-align: left;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--indigo);
  transition: color .18s;
}
.faq-question:hover { color: var(--amber); }

.faq-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.1rem;
  color: var(--indigo);
  transition: transform .25s, background .18s, border-color .18s;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--indigo);
  border-color: var(--indigo);
  color: var(--white);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-answer-inner {
  padding-bottom: 22px;
  font-size: .95rem;
  color: var(--ink-m);
  line-height: 1.7;
}

/* ── Contact / Form ───────────────────────────────── */
.contact-section {
  background: var(--sky);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.contact-info-title { font-size: 2rem; margin-bottom: 20px; }
.contact-info-text { color: var(--ink-m); line-height: 1.7; margin-bottom: 40px; }

.contact-list { list-style: none; display: flex; flex-direction: column; gap: 20px; }

.contact-list-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.contact-list-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--indigo);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-list-label { font-size: .78rem; color: var(--ink-l); margin-bottom: 2px; }
.contact-list-value { font-size: .95rem; font-weight: 600; color: var(--indigo); }

.contact-form-card {
  background: var(--white);
  border-radius: var(--radius-l);
  padding: 44px 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.form-title {
  font-size: 1.4rem;
  margin-bottom: 8px;
}
.form-subtitle { color: var(--ink-m); font-size: .9rem; margin-bottom: 32px; }

.form-group { margin-bottom: 20px; }

.form-label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--indigo);
  margin-bottom: 7px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: .93rem;
  color: var(--ink);
  background: var(--white);
  outline: none;
  transition: border-color .18s, box-shadow .18s;
}
.form-control::placeholder { color: var(--ink-l); }
.form-control:focus {
  border-color: var(--indigo);
  box-shadow: 0 0 0 3px rgba(27,31,94,.1);
}
.form-control.error { border-color: #E53935; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

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

select.form-control { cursor: pointer; }

.form-error {
  font-size: .78rem;
  color: #E53935;
  margin-top: 5px;
  display: none;
}
.form-error.show { display: block; }

.form-consent {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.form-consent input[type="checkbox"] {
  width: 18px; height: 18px;
  accent-color: var(--indigo);
  flex-shrink: 0;
  margin-top: 2px;
}

.form-consent label {
  font-size: .82rem;
  color: var(--ink-m);
  line-height: 1.5;
}

.form-consent a { color: var(--indigo); text-decoration: underline; }

.form-submit { width: 100%; justify-content: center; font-size: 1rem; padding: 16px; }

.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}
.form-success.show { display: block; }

.form-success-icon {
  width: 64px; height: 64px;
  background: rgba(27,31,94,.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 20px;
}
.form-success h3 { font-size: 1.3rem; margin-bottom: 10px; }
.form-success p { color: var(--ink-m); font-size: .93rem; }

/* ── CTA Banner ───────────────────────────────────── */
.cta-banner {
  background: linear-gradient(135deg, var(--indigo-d) 0%, var(--indigo) 100%);
  border-radius: var(--radius-l);
  padding: 64px 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-title {
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  color: var(--white);
  max-width: 560px;
}
.cta-title span { color: var(--amber); }

/* ── Footer ───────────────────────────────────────── */
.footer {
  background: var(--indigo-d);
  color: rgba(255,255,255,.65);
  padding-top: 72px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 60px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.footer-brand-text {
  font-size: .88rem;
  line-height: 1.7;
  margin: 16px 0 24px;
  max-width: 300px;
}

.footer-social { display: flex; gap: 10px; }

.social-link {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: rgba(255,255,255,.65);
  transition: background .18s, color .18s;
}
.social-link:hover { background: var(--amber); color: var(--indigo); border-color: var(--amber); }

.footer-col-title {
  font-family: 'Unbounded', sans-serif;
  font-size: .85rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: .88rem;
  color: rgba(255,255,255,.55);
  transition: color .18s;
}
.footer-links a:hover { color: var(--amber); }

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .88rem;
  color: rgba(255,255,255,.55);
  margin-bottom: 12px;
}
.footer-contact-item a:hover { color: var(--amber); }

.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom-copy { font-size: .82rem; }

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

.footer-bottom-links a {
  font-size: .82rem;
  color: rgba(255,255,255,.4);
  transition: color .18s;
}
.footer-bottom-links a:hover { color: rgba(255,255,255,.75); }

/* ── Back to top ──────────────────────────────────── */
.back-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  background: var(--indigo);
  color: var(--white);
  border: none;
  border-radius: 12px;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow-m);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .25s, transform .25s;
  z-index: 90;
}
.back-top.visible { opacity: 1; transform: translateY(0); }
.back-top:hover { background: var(--amber); color: var(--indigo); }

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { display: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-banner { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-inner { grid-template-columns: 1fr; }
  .cta-banner { flex-direction: column; text-align: center; }
}

@media (max-width: 720px) {
  .nav-links, .nav-cta { display: none; }
  .burger { display: flex; }
  .section { padding: 64px 0; }
  .features-grid { grid-template-columns: 1fr; }
  .courses-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .stats-banner { grid-template-columns: 1fr 1fr; padding: 40px 28px; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .contact-form-card { padding: 28px 20px; }
  .cta-banner { padding: 36px 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}