:root {
  --bg: #fafaf9;
  --text: #1c1917;
  --muted: #78716c;
  --link: #2563eb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1917;
    --text: #f5f5f4;
    --muted: #a8a29e;
    --link: #93c5fd;
  }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { margin: 16px 0 4px; }
h2 { margin-top: 32px; font-size: 20px; }
a { color: var(--link); }
.muted { color: var(--muted); }
li { margin: 6px 0; }