/* FastSec Edu — тёмная тема, токены внизу файла в :root. */

:root {
  --bg: #0a0e17;
  --bg-soft: #0d1220;
  --surface: #131a2b;
  --surface-2: #182138;
  --border: #22304e;
  --border-soft: #1a2540;
  --text: #e8edf6;
  --muted: #9aa8c2;
  --muted-2: #6b7a99;
  --accent: #4f8cff;
  --accent-2: #22d3ee;
  --accent-grad: linear-gradient(135deg, #4f8cff, #22d3ee);
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 18px 48px rgba(2, 6, 16, 0.55);
  --shadow-soft: 0 8px 24px rgba(2, 6, 16, 0.35);
  --header-h: 68px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

[hidden] { display: none !important; }

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; letter-spacing: -0.01em; }

h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); }
h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); }
h3 { font-size: 1.15rem; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

::selection { background: rgba(79, 140, 255, 0.35); }

.container { max-width: 1160px; margin: 0 auto; padding: 0 20px; }

.section { padding: 72px 0; }
.section + .section { padding-top: 0; }

.section-head { max-width: 640px; margin-bottom: 40px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 12px;
}

.lead { color: var(--muted); font-size: 1.05rem; margin-top: 12px; }

/* ---------- шапка ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(10, 14, 23, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner { display: flex; align-items: center; gap: 28px; height: var(--header-h); }

.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.12rem; color: var(--text); }
.logo:hover { text-decoration: none; }
.logo-mark { width: 30px; height: 30px; }
.logo-text b { color: var(--accent-2); font-weight: 700; }

.nav { display: flex; gap: 22px; margin-left: 12px; }
.nav a { color: var(--muted); font-weight: 500; font-size: 0.95rem; padding: 6px 2px; }
.nav a:hover { color: var(--text); text-decoration: none; }

.header-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }

.btn-menu {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0 10px;
}
.btn-menu span { display: block; height: 2px; border-radius: 2px; background: var(--text); transition: transform 0.2s, opacity 0.2s; }
.btn-menu[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.btn-menu[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.btn-menu[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- кнопки ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent-grad);
  color: #061020;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
}
.btn-primary:hover { box-shadow: 0 10px 30px rgba(34, 211, 238, 0.4); }

.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); background: rgba(79, 140, 255, 0.08); }

.btn-lg { padding: 14px 28px; font-size: 1.02rem; border-radius: 14px; }
.btn-sm { padding: 8px 16px; font-size: 0.88rem; border-radius: 10px; }
.btn:disabled { opacity: 0.45; cursor: default; transform: none; }
.btn:disabled:hover { box-shadow: none; }

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 84px;
  border-bottom: 1px solid var(--border-soft);
  background:
    radial-gradient(ellipse 60% 45% at 70% 10%, rgba(79, 140, 255, 0.14), transparent 65%),
    radial-gradient(ellipse 45% 40% at 15% 85%, rgba(34, 211, 238, 0.1), transparent 60%),
    var(--bg);
}

.hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(79, 140, 255, 0.09);
  color: var(--accent-2);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 22px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 10px var(--ok); }

.hero-lead { color: var(--muted); font-size: 1.14rem; max-width: 520px; margin-top: 18px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 40px;
  margin-top: 52px;
}
.stat-value { font-size: 1.6rem; font-weight: 800; background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { color: var(--muted-2); font-size: 0.85rem; margin-top: 2px; }

/* мок-превью плеера в hero */
.hero-preview {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: rotate(0.6deg);
}
.preview-screen { position: relative; }
.preview-thumb {
  aspect-ratio: 16 / 8.2;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(140deg, rgba(6, 16, 32, 0), rgba(6, 16, 32, 0.3)), var(--thumb-grad, linear-gradient(135deg, #4f8cff, #22d3ee));
}
.preview-thumb svg { width: 62px; height: 62px; opacity: 0.9; filter: drop-shadow(0 6px 18px rgba(2, 6, 16, 0.5)); }
.preview-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.9rem;
}
.preview-bar .preview-time { color: var(--muted-2); font-variant-numeric: tabular-nums; }
.preview-list { padding: 10px 12px; }
.preview-row { display: flex; align-items: center; gap: 12px; padding: 9px 10px; border-radius: 10px; color: var(--muted); font-size: 0.9rem; }
.preview-row.active { background: rgba(79, 140, 255, 0.1); color: var(--text); }
.preview-dot { width: 22px; height: 22px; border-radius: 8px; background: var(--surface-2); border: 1px solid var(--border); display: inline-flex; align-items: center; justify-content: center; font-size: 0.7rem; color: var(--muted-2); flex: none; }
.preview-row.active .preview-dot { background: var(--accent-grad); color: #061020; border-color: transparent; }

/* ---------- карточки ---------- */

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.18s, border-color 0.18s, box-shadow 0.18s;
}
.card:hover { transform: translateY(-3px); border-color: var(--border); box-shadow: var(--shadow-soft); }

.course-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.course-card a.card-link { display: flex; flex-direction: column; flex: 1; color: var(--text); }
.course-card a.card-link:hover { text-decoration: none; }
.course-card a.card-link:hover .course-title { color: var(--accent-2); }

.course-thumb {
  aspect-ratio: 16 / 8.5;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.course-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 70% at 75% 20%, rgba(255, 255, 255, 0.14), transparent 55%);
}
.course-thumb svg { width: 58px; height: 58px; color: rgba(6, 16, 32, 0.82); filter: drop-shadow(0 4px 14px rgba(2, 6, 16, 0.35)); z-index: 1; }

.course-body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.course-title { font-size: 1.08rem; font-weight: 700; transition: color 0.15s; }
.course-desc { color: var(--muted); font-size: 0.92rem; flex: 1; }

.course-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--muted-2);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-soft);
  padding-top: 14px;
  margin-top: 4px;
}
.course-meta span { display: inline-flex; align-items: center; gap: 6px; }
.course-meta svg { width: 14px; height: 14px; }

/* цветовые темы карточек/курсов */
.theme-basics   { --thumb-grad: linear-gradient(135deg, #3b82f6, #22d3ee); }
.theme-network  { --thumb-grad: linear-gradient(135deg, #8b5cf6, #6366f1); }
.theme-networks { --thumb-grad: linear-gradient(135deg, #10b981, #34d399); }
.theme-crypto   { --thumb-grad: linear-gradient(135deg, #f59e0b, #ef6c2f); }
.theme-linux    { --thumb-grad: linear-gradient(135deg, #06b6d4, #3b82f6); }

.course-thumb.theme { background: var(--thumb-grad); }

/* ---------- бейджи и чипы ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(79, 140, 255, 0.12);
  color: var(--accent-2);
  border: 1px solid rgba(79, 140, 255, 0.25);
}
.badge-green { background: rgba(52, 211, 153, 0.1); color: var(--ok); border-color: rgba(52, 211, 153, 0.25); }
.badge-amber { background: rgba(251, 191, 36, 0.1); color: var(--warn); border-color: rgba(251, 191, 36, 0.25); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.86rem;
}
.chip svg { width: 14px; height: 14px; color: var(--accent-2); }

.meta-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }

/* ---------- фичи и шаги ---------- */

.feature-icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: var(--accent-grad);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
}
.feature-icon svg { width: 24px; height: 24px; color: #061020; }
.feature-card h3 { margin-bottom: 8px; }
.feature-card p { color: var(--muted); font-size: 0.94rem; }

.step-num {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-2);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  display: block;
}
.step-card h3 { margin-bottom: 8px; }
.step-card p { color: var(--muted); font-size: 0.94rem; }

/* ---------- отзывы ---------- */

.quote-card { display: flex; flex-direction: column; gap: 16px; }
.quote-text { color: var(--text); font-size: 0.98rem; }
.quote-text::before { content: "«"; color: var(--accent-2); }
.quote-text::after { content: "»"; color: var(--accent-2); }
.quote-author { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #061020;
  background: var(--accent-grad);
  flex: none;
}
.quote-author b { display: block; font-size: 0.92rem; }
.quote-author span { color: var(--muted-2); font-size: 0.82rem; }

/* ---------- FAQ ---------- */

.faq { max-width: 760px; margin: 0 auto; display: grid; gap: 12px; }

.faq-item, .tab {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}
.faq-item summary, .tab summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.faq-item summary::-webkit-details-marker, .tab summary::-webkit-details-marker { display: none; }
.faq-item summary::after, .tab summary::after {
  content: "+";
  font-size: 1.3rem;
  color: var(--accent-2);
  transition: transform 0.2s;
  flex: none;
}
.faq-item[open] summary::after, .tab[open] summary::after { transform: rotate(45deg); }
.faq-answer { padding: 0 22px 20px; color: var(--muted); }

/* ---------- CTA ---------- */

.cta-band {
  border-top: 1px solid var(--border-soft);
  background:
    radial-gradient(ellipse 55% 90% at 50% 120%, rgba(79, 140, 255, 0.16), transparent 70%),
    var(--bg-soft);
}
.cta-inner { text-align: center; padding: 72px 20px; }
.cta-inner p { color: var(--muted); margin: 14px auto 28px; max-width: 480px; }

/* ---------- страница курса ---------- */

.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; color: var(--muted-2); font-size: 0.88rem; margin-bottom: 22px; }
.breadcrumbs a { color: var(--muted); }
.breadcrumbs b { color: var(--text); font-weight: 600; }

.course-hero {
  padding: 44px 0 52px;
  border-bottom: 1px solid var(--border-soft);
  background:
    radial-gradient(ellipse 55% 60% at 80% 0%, rgba(79, 140, 255, 0.12), transparent 65%),
    var(--bg);
}
.course-hero-row { display: flex; gap: 40px; align-items: flex-start; justify-content: space-between; }
.course-hero h1 { margin-top: 16px; font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
.course-lead { color: var(--muted); max-width: 620px; margin-top: 12px; }
.course-hero-art { flex: none; width: 150px; height: 150px; border-radius: 28px; background: var(--thumb-grad, var(--accent-grad)); display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-soft); }
.course-hero-art svg { width: 72px; height: 72px; color: rgba(6, 16, 32, 0.82); }

.course-section { padding-top: 48px; }

.course-layout { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 32px; align-items: start; }

.player-shell { scroll-margin-top: calc(var(--header-h) + 16px); }

.player-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #05080f;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.player-frame video { width: 100%; height: 100%; }

.player-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 12, 22, 0.88);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 2;
}
.player-overlay[hidden] { display: none; }
.overlay-box { text-align: center; padding: 24px; max-width: 420px; }
.overlay-logo { width: 54px; height: 54px; margin: 0 auto 18px; }
.overlay-text { font-weight: 600; font-size: 1.02rem; margin-top: 16px; }
.overlay-hint { color: var(--muted); font-size: 0.88rem; margin-top: 6px; }
.overlay-next { margin-top: 18px; }

.spinner {
  width: 34px;
  height: 34px;
  margin: 0 auto;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent-2);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.player-overlay.no-spinner .spinner { display: none; }

.player-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding: 16px 4px 0;
}
.player-title-row { min-width: 0; }
.lesson-counter { color: var(--accent-2); font-size: 0.84rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; }
.player-title-row h2 { font-size: 1.2rem; margin-top: 3px; }
.lesson-duration-inline { color: var(--muted-2); font-size: 0.88rem; }
.player-nav { display: flex; gap: 10px; }

.course-tabs { display: grid; gap: 12px; margin-top: 28px; }
.tab-body { padding: 0 22px 20px; }

.prose p { color: var(--muted); margin-bottom: 12px; }
.prose p:last-child { margin-bottom: 0; }
.prose ul, .prose ol { color: var(--muted); padding-left: 20px; display: grid; gap: 8px; margin-top: 6px; }
.prose li::marker { color: var(--accent-2); }

.lesson-panel {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 18px;
}
.lesson-panel h3 { padding: 4px 8px 12px; font-size: 1rem; }
.lesson-list { list-style: none; max-height: 58vh; overflow: auto; display: grid; gap: 4px; padding-right: 4px; }

.lesson-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  background: none;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  transition: background 0.15s, border-color 0.15s;
}
.lesson-item:hover { background: var(--surface-2); }
.lesson-item.active { background: rgba(79, 140, 255, 0.12); border-color: rgba(79, 140, 255, 0.3); }

.lesson-num {
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  color: var(--muted-2);
  font-size: 0.8rem;
  font-weight: 700;
}
.lesson-item.active .lesson-num { background: var(--accent-grad); color: #061020; border-color: transparent; }

.lesson-body { min-width: 0; flex: 1; display: grid; gap: 1px; }
.lesson-title { font-size: 0.92rem; font-weight: 500; line-height: 1.35; }
.lesson-duration { color: var(--muted-2); font-size: 0.8rem; font-variant-numeric: tabular-nums; }
.lesson-play { flex: none; width: 15px; height: 15px; color: var(--muted-2); }
.lesson-item.active .lesson-play { color: var(--accent-2); }

.related { padding-bottom: 72px; }
.related h2 { margin-bottom: 24px; }

/* ---------- обычные страницы (about, contacts, legal) ---------- */

.page-hero {
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--border-soft);
  background:
    radial-gradient(ellipse 55% 70% at 25% 0%, rgba(34, 211, 238, 0.1), transparent 60%),
    var(--bg);
}
.page-hero p.lead { max-width: 640px; }

.numbers-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 40px 0; border-bottom: 1px solid var(--border-soft); }
.number-tile { text-align: center; padding: 20px; }

.team-card { text-align: center; }
.team-card .avatar { width: 64px; height: 64px; font-size: 1.2rem; margin: 0 auto 16px; border-radius: 20px; }
.team-card b { display: block; }
.team-card span { color: var(--muted-2); font-size: 0.88rem; display: block; margin-top: 2px; }
.team-card p { color: var(--muted); font-size: 0.9rem; margin-top: 12px; }

.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }

.contact-list { display: grid; gap: 18px; margin-top: 24px; }
.contact-row { display: flex; gap: 14px; align-items: flex-start; }
.contact-row .feature-icon { width: 40px; height: 40px; border-radius: 11px; margin: 0; flex: none; }
.contact-row .feature-icon svg { width: 20px; height: 20px; }
.contact-row b { display: block; font-size: 0.95rem; }
.contact-row span { color: var(--muted); font-size: 0.92rem; }

.form-card { background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 28px; }
.field { display: grid; gap: 6px; margin-bottom: 16px; }
.field label { font-size: 0.88rem; font-weight: 600; color: var(--muted); }
.field input, .field textarea {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 12px 14px;
  color: var(--text);
  font: inherit;
  transition: border-color 0.15s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.field textarea { min-height: 130px; resize: vertical; }
.form-status { margin-top: 14px; font-size: 0.92rem; min-height: 1.4em; }
.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--danger); }

.legal-wrap { max-width: 780px; }
.legal-wrap .prose h3 { margin: 28px 0 10px; }
.legal-wrap .prose h3:first-child { margin-top: 0; }
.legal-meta { color: var(--muted-2); font-size: 0.9rem; margin-top: 12px; }

/* ---------- 404 ---------- */

.error-page { min-height: 60vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 60px 20px; }
.error-code { font-size: clamp(4rem, 12vw, 7rem); font-weight: 800; background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; color: transparent; line-height: 1; }
.error-page p { color: var(--muted); margin: 16px 0 28px; }

/* ---------- подвал ---------- */

.site-footer { border-top: 1px solid var(--border-soft); background: var(--bg-soft); margin-top: 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  padding: 52px 20px 36px;
}
.footer-col h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted-2); margin-bottom: 14px; }
.footer-col a { display: block; color: var(--muted); font-size: 0.92rem; padding: 4px 0; }
.footer-col a:hover { color: var(--text); text-decoration: none; }
.footer-brand p { color: var(--muted); font-size: 0.92rem; margin-top: 12px; max-width: 300px; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 26px;
  border-top: 1px solid var(--border-soft);
  color: var(--muted-2);
  font-size: 0.86rem;
}
.footer-bottom a { color: var(--muted); }

/* ---------- адаптив ---------- */

@media (max-width: 1020px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-preview { max-width: 560px; }
  .course-layout { grid-template-columns: 1fr; }
  .lesson-panel { position: static; }
  .lesson-list { max-height: none; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .section { padding: 52px 0; }
  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 4px;
    background: #0a0e17;
    box-shadow: 0 18px 32px rgba(2, 6, 16, 0.55);
    border-bottom: 1px solid var(--border-soft);
    padding: 12px 20px 18px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 10px 4px; font-size: 1rem; }
  .btn-menu { display: flex; }
  .header-cta { display: none; }
  .hero { padding: 64px 0 56px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .course-hero-row { flex-direction: column; }
  .course-hero-art { display: none; }
  .player-bar { flex-direction: column; align-items: flex-start; }
  .numbers-band { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}