:root {
  color-scheme: dark;
  --accent: #67e8f9;
  --border: #25304a;
  --muted: #a8b3cf;
  --panel: #11182a;
  --text: #f8fafc;
}

* { box-sizing: border-box; }

body {
  background: radial-gradient(circle at 80% 0, #102e47 0, #070b17 38rem);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0 auto;
  max-width: 1120px;
  min-height: 100vh;
  padding: 0 24px;
}

a { color: var(--accent); }

.site-header,
footer {
  align-items: center;
  display: flex;
  justify-content: space-between;
}

.site-header {
  border-bottom: 1px solid var(--border);
  min-height: 72px;
}

.brand {
  color: var(--text);
  font-weight: 750;
  text-decoration: none;
}

nav { display: flex; gap: 24px; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover,
nav a[aria-current="page"] { color: var(--text); }

main { padding: 72px 0; }

.hero { max-width: 800px; padding: 56px 0 80px; }
.eyebrow { color: var(--accent); font-size: 13px; font-weight: 750; letter-spacing: .14em; text-transform: uppercase; }
h1 { font-size: clamp(42px, 7vw, 76px); letter-spacing: -.045em; line-height: 1.02; margin: 16px 0 24px; }
h2 { line-height: 1.25; }
.lede { color: var(--muted); font-size: 20px; max-width: 720px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { border: 1px solid var(--border); border-radius: 10px; color: var(--text); font-weight: 700; padding: 11px 18px; text-decoration: none; }
.button.primary { background: #4f46e5; border-color: #4f46e5; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(3, 1fr); }
.grid article,
.notice {
  background: color-mix(in srgb, var(--panel) 90%, transparent);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
}
.grid p,
.notice p { color: var(--muted); }
.notice { margin-top: 16px; }

.document { max-width: 780px; }
.document h1 { font-size: clamp(42px, 6vw, 64px); }
.document h2 { margin-top: 40px; }
.document p,
.document li { color: #d6dbea; }
.document code { background: var(--panel); border-radius: 4px; padding: 2px 5px; }

footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
  padding: 24px 0 40px;
}

@media (max-width: 720px) {
  .site-header { align-items: flex-start; flex-direction: column; gap: 10px; justify-content: center; }
  main { padding-top: 40px; }
  .hero { padding-top: 32px; }
  .grid { grid-template-columns: 1fr; }
  footer { align-items: flex-start; flex-direction: column; gap: 8px; }
}