:root {
  --bg: #070b14;
  --bg-alt: #0d1424;
  --surface: #121b2e;
  --border: #24304a;
  --text: #eef2ff;
  --muted: #94a3b8;
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --accent-hover: #6d4df5;
  --success: #34d399;
  --radius: 16px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(7, 11, 20, 0.85);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 16px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo span { color: var(--accent-2); }

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  font-size: 0.9375rem;
  transition: color 0.15s;
}

.nav a:hover { color: var(--text); }

.nav-cta {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text) !important;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 1.1rem;
  cursor: pointer;
}

.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(circle at top right, rgba(124, 92, 255, 0.25), transparent 35%),
    radial-gradient(circle at bottom left, rgba(34, 211, 238, 0.15), transparent 30%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  align-items: center;
}

.badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.15);
  border: 1px solid rgba(124, 92, 255, 0.35);
  color: #c4b5fd;
  font-size: 0.8125rem;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.hero-text {
  color: var(--muted);
  font-size: 1.0625rem;
  max-width: 620px;
  margin-bottom: 24px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s, border-color 0.15s;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #5b21b6);
  color: #fff;
}

.btn-primary:hover { background: linear-gradient(135deg, var(--accent-hover), #4c1d95); }

.btn-outline {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}

.btn-outline:hover { border-color: var(--accent-2); }

.btn-block { width: 100%; }

.hero-stats {
  list-style: none;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-stats strong {
  font-size: 1.5rem;
  color: var(--accent-2);
}

.hero-stats span {
  font-size: 0.8125rem;
  color: var(--muted);
}

.hero-card-inner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.hero-card-label {
  color: var(--accent-2);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.hero-card-inner h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.hero-card-inner p {
  color: var(--muted);
  margin-bottom: 20px;
}

.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-head {
  max-width: 720px;
  margin-bottom: 32px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.section-head p { color: var(--muted); }

.cards {
  display: grid;
  gap: 20px;
}

.cards-3 { grid-template-columns: repeat(3, 1fr); }

.cards-catalog { grid-template-columns: repeat(3, 1fr); }

.card, .course-card, .review {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.card h3, .course-card h3 {
  margin-bottom: 10px;
  font-size: 1.125rem;
}

.card p, .course-card p { color: var(--muted); }

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

.course-card.featured {
  border-color: rgba(124, 92, 255, 0.65);
  box-shadow: 0 0 0 1px rgba(124, 92, 255, 0.25);
}

.course-tag {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--accent-2);
}

.course-card ul {
  list-style: none;
  color: var(--muted);
  font-size: 0.875rem;
  display: grid;
  gap: 6px;
  margin-top: auto;
  padding-top: 8px;
}

.course-card ul li::before {
  content: "▸ ";
  color: var(--accent-2);
}

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

.advantage {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.advantage span {
  display: inline-block;
  color: var(--accent-2);
  font-weight: 800;
  margin-bottom: 10px;
}

.advantage h3 { margin-bottom: 8px; }

.advantage p { color: var(--muted); }

.steps {
  list-style: none;
  display: grid;
  gap: 16px;
  counter-reset: step;
}

.steps li {
  display: grid;
  gap: 4px;
  padding: 20px 20px 20px 68px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  position: relative;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 20px;
  top: 20px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(124, 92, 255, 0.18);
  color: #c4b5fd;
  font-weight: 800;
}

.steps strong { font-size: 1rem; }

.steps span { color: var(--muted); font-size: 0.9375rem; }

.review p {
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 16px;
}

.review footer { color: var(--muted); font-size: 0.875rem; }

.faq {
  display: grid;
  gap: 12px;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.faq summary::-webkit-details-marker { display: none; }

.faq p {
  color: var(--muted);
  margin-top: 10px;
}

.contacts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.contact-list {
  list-style: none;
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.contact-list a { color: var(--accent-2); }

.contact-form {
  display: grid;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.contact-form label {
  display: grid;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  padding: 11px 12px;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-2);
}

.form-note {
  color: var(--muted);
  font-size: 0.75rem;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 32px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: 16px;
}

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

@media (max-width: 960px) {
  .hero-grid,
  .contacts-grid,
  .cards-3,
  .cards-catalog,
  .advantages {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }

  .nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    background: rgba(7, 11, 20, 0.98);
    border-bottom: 1px solid var(--border);
  }

  .nav.open { display: flex; }

  .header-inner { position: relative; }

  .hero { padding-top: 48px; }
}