:root {
  color-scheme: light dark;
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #f6f7fb;
  --card: #fff;
  --text: #202230;
  --muted: #626777;
  --accent: #6558d3;
  --border: #dde0e9;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
header, main, footer { width: min(760px, calc(100% - 32px)); margin: auto; }
header { padding: 36px 0 18px; }
nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
nav a, a { color: var(--accent); }
main { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: clamp(24px, 5vw, 48px); }
h1 { line-height: 1.15; margin-top: 0; }
h2 { margin-top: 2rem; line-height: 1.25; }
p, li { max-width: 70ch; }
.muted { color: var(--muted); }
.links { display: grid; gap: 12px; margin: 28px 0; }
.links a { padding: 14px 16px; border: 1px solid var(--border); border-radius: 10px; text-decoration: none; }
dl { display: grid; grid-template-columns: minmax(130px, 1fr) 2fr; gap: 10px 20px; }
dt { font-weight: 700; }
dd { margin: 0; overflow-wrap: anywhere; }
footer { padding: 22px 0 40px; color: var(--muted); font-size: .9rem; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #12131a; --card: #1b1d27; --text: #f2f3f7; --muted: #b5b9c8; --border: #353846; --accent: #b4aaff; }
}
@media (max-width: 520px) { dl { grid-template-columns: 1fr; gap: 2px; } dd { margin-bottom: 12px; } }