:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1b1b1f;
  --muted: #5b5b66;
  --rule: #e2e2e8;
  --link: #2f5fd0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131316;
    --fg: #e6e6ea;
    --muted: #a0a0ac;
    --rule: #2c2c33;
    --link: #8fb0ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 2.5rem 1.25rem 4rem;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 42rem;
  margin: 0 auto;
}

h1 {
  font-size: 1.75rem;
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.125rem;
  margin: 2.25rem 0 0.5rem;
}

.lead {
  color: var(--muted);
  font-size: 1.0625rem;
}

ul { padding-left: 1.25rem; }

li { margin: 0.35rem 0; }

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.updated {
  color: var(--muted);
  font-size: 0.9375rem;
}

footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
}