:root {
  --bg: #fdfcf8;
  --fg: #222;
  --muted: #666;
  --accent: #b5651d;
  --rule: #e5e1d8;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #161616; --fg: #e8e6e1; --muted: #9a968e; --accent: #e09a5a; --rule: #2e2e2e; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 32px 16px 64px; }
header { border-bottom: 1px solid var(--rule); margin-bottom: 24px; padding-bottom: 12px; }
header a.brand { font-weight: 700; font-size: 1.3rem; color: var(--fg); text-decoration: none; }
nav { margin-top: 6px; font-size: 0.95rem; }
nav a { margin-right: 14px; }
a { color: var(--accent); }
h1 { font-size: 1.7rem; margin: 0 0 4px; }
h2 { font-size: 1.2rem; margin-top: 28px; }
.updated { color: var(--muted); font-size: 0.9rem; margin-top: 0; }
footer { border-top: 1px solid var(--rule); margin-top: 40px; padding-top: 12px; color: var(--muted); font-size: 0.85rem; }
.todo { background: #fff3c4; color: #5a4500; padding: 0 4px; border-radius: 3px; }
@media (prefers-color-scheme: dark) { .todo { background: #4a3d00; color: #ffe58a; } }