:root {
  --bg: #07080d;
  --panel: #10131c;
  --panel-hover: #161a27;
  --line: #232838;
  --text: #eef1f8;
  --muted: #9aa3b8;
  --cyan: #5ee7ff;
  --pink: #ff4fd8;
  --radius: 16px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(255, 79, 216, 0.14), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(94, 231, 255, 0.12), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}

main, .top, .foot {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.top { padding-top: 22px; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand svg { width: 32px; height: 32px; }

.hero { padding: 72px 0 48px; max-width: 760px; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.lede { margin: 0; color: var(--muted); font-size: 19px; }

.section-title {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.card:hover, .card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--cyan);
  background: var(--panel-hover);
  outline: none;
}

.thumb {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #0c0e15;
}

.thumb--empty {
  display: grid;
  place-items: center;
  background:
    linear-gradient(180deg, transparent 55%, rgba(7, 8, 13, 0.9)),
    repeating-linear-gradient(90deg, rgba(94, 231, 255, 0.09) 0 1px, transparent 1px 48px),
    linear-gradient(160deg, #1c2a4a, #3a1f4d 60%, #0c0e15);
}

.thumb--empty span {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-shadow: 0 0 24px rgba(94, 231, 255, 0.6);
}

.card-body { display: flex; flex-direction: column; gap: 6px; padding: 18px 20px 20px; flex: 1; }

.card-body h3 { margin: 4px 0 0; font-size: 22px; }

.card-body p { margin: 0; color: var(--muted); flex: 1; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }

.chip {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
}

.chip--mode { border-color: rgba(255, 79, 216, 0.5); color: var(--pink); }

.play { margin-top: 10px; color: var(--cyan); font-weight: 700; }

.how { padding: 64px 0 24px; max-width: 760px; }

.how ol { margin: 0; padding-left: 22px; }

.how li { margin-bottom: 8px; }

.note { color: var(--muted); font-size: 15px; }

.foot { padding-top: 40px; padding-bottom: 40px; color: var(--muted); font-size: 14px; }

@media (max-width: 600px) {
  main, .top, .foot { padding-left: 16px; padding-right: 16px; }
  .hero { padding: 44px 0 32px; }
  .grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
  .card:hover { transform: none; }
}