:root {
  --bg: #f4f2ec;
  --ink: #1d1f24;
  --muted: #6b6d73;
  --link: #3553c9;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16181d; --ink: #e9e7e1; --muted: #9a9ca3; --link: #8fa6ff; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 0.5em; }
h2 { font-size: 1.15rem; margin: 2em 0 0.4em; }
a { color: var(--link); }
ul { padding-left: 1.2em; }
.muted { color: var(--muted); font-size: 0.9rem; }
.crumb { margin: 0 0 1.5em; font-weight: 600; }
.crumb a { text-decoration: none; }