:root {
  --bg: #faf8f5;
  --fg: #1f1d1a;
  --muted: #6b655c;
  --accent: #c2410c;
  --card: #ffffff;
  --line: #e7e2da;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171513;
    --fg: #ede9e3;
    --muted: #a39b8f;
    --accent: #f97316;
    --card: #211e1b;
    --line: #36312b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center; justify-content: space-between; padding-top: 24px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
header .brand { font-weight: 700; font-size: 18px; color: var(--accent); text-decoration: none; }
nav { display: flex; gap: 16px; flex-wrap: wrap; }
nav a { color: var(--fg); text-decoration: none; font-size: 15px; }
nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }
main { padding-top: 24px; padding-bottom: 40px; }
h1 { font-size: 28px; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
h3 { font-size: 17px; margin: 20px 0 6px; }
p, li { color: var(--fg); }
.muted { color: var(--muted); font-size: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; margin: 16px 0; }
.vi { border-left: 3px solid var(--accent); padding-left: 14px; }
a { color: var(--accent); }
ul { padding-left: 22px; }
footer { padding-top: 16px; padding-bottom: 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }