:root {
  --bg: #faf8f4;
  --ink: #1f1d1a;
  --muted: #6b665e;
  --link: #2f6fb3;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171a;
    --ink: #ecebe8;
    --muted: #a19d96;
    --link: #7fb2ea;
  }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 640px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
a { color: var(--link); }
.muted { color: var(--muted); margin-top: 0; }
.crumb { font-size: 0.9rem; margin: 0 0 24px; }
.crumb a { color: var(--muted); text-decoration: none; }
.crumb a:hover { text-decoration: underline; }
ul { padding-left: 1.2em; }
li { margin-bottom: 6px; }