:root {
  --bg: #f6f4f1;
  --surface: #ffffff;
  --text: #111318;
  --muted: #4b4f58;
  --accent: #b93c0b;
  --border: #e4e0da;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --surface: #1a1c22;
    --text: #f6f2ee;
    --muted: #b4bac4;
    --accent: #ff8a4c;
    --border: #2c3038;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 40px 20px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
header img { width: 48px; height: 48px; border-radius: 11px; }
header a { color: var(--text); text-decoration: none; font-weight: 700; font-size: 18px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.02em; }
h2 { font-size: 19px; margin: 32px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); font-size: 14px; }
a { color: var(--accent); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 20px;
  margin: 20px 0;
}
nav.links { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 40px; font-size: 15px; }