:root {
  color-scheme: dark;
  --bg: #061019;
  --panel: #0d1b25;
  --text: #f3f7f8;
  --muted: #9cabb3;
  --mint: #6bf0c3;
  --gold: #efc06a;
  --line: rgba(255,255,255,.09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: radial-gradient(circle at 85% 0%, rgba(107,240,195,.08), transparent 32rem), var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--mint); }
a:hover { color: #a6f9dc; }
.shell { width: min(920px, calc(100% - 40px)); margin: 0 auto; }
header { border-bottom: 1px solid var(--line); }
nav { min-height: 76px; display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.brand { color: var(--text); text-decoration: none; font-weight: 850; letter-spacing: .18em; margin-right: auto; }
nav a:not(.brand) { color: var(--muted); text-decoration: none; font-size: 15px; }
nav a:not(.brand):hover { color: var(--text); }
main { padding: 72px 0 96px; }
.hero { padding: 42px; background: linear-gradient(145deg, rgba(107,240,195,.08), rgba(255,255,255,.02)); border: 1px solid var(--line); border-radius: 28px; }
.eyebrow { color: var(--mint); font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1 { font-size: clamp(38px, 7vw, 64px); line-height: 1.05; letter-spacing: -.04em; margin: 14px 0 22px; }
h2 { font-size: 27px; line-height: 1.2; margin: 48px 0 12px; }
h3 { font-size: 20px; margin-top: 30px; }
p, li { color: #ccd5d9; }
.lede { color: var(--muted); font-size: 20px; max-width: 720px; }
.meta { color: var(--muted); font-size: 14px; }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 24px; }
.card { display: block; padding: 24px; border-radius: 20px; border: 1px solid var(--line); background: var(--panel); color: var(--text); text-decoration: none; }
.card:hover { border-color: rgba(107,240,195,.4); transform: translateY(-1px); }
.card strong { display: block; margin-bottom: 5px; }
.card span { color: var(--muted); font-size: 15px; }
.notice { padding: 18px 20px; border-left: 3px solid var(--gold); background: rgba(239,192,106,.08); border-radius: 8px 16px 16px 8px; }
footer { border-top: 1px solid var(--line); color: var(--muted); padding: 28px 0 44px; font-size: 14px; }
ul, ol { padding-left: 24px; }
code { color: var(--gold); }

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 28px 22px; }
  main { padding-top: 42px; }
  nav { gap: 14px; }
}