:root {
  color-scheme: light dark;
  --max-width: 720px;
  --fg: #1a1a1a;
  --bg: #ffffff;
  --muted: #5c5c5c;
  --accent: #2454c7;
  --border: #e2e2e2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --bg: #121212;
    --muted: #aaaaaa;
    --accent: #7aa2ff;
    --border: #2a2a2a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 2.5rem 1.25rem 4rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
}

h1 {
  font-size: 1.75rem;
  margin-bottom: 0.25rem;
}

h2 {
  font-size: 1.15rem;
  margin-top: 2rem;
}

p, li {
  color: var(--fg);
}

.subtitle {
  color: var(--muted);
  margin-top: 0;
  margin-bottom: 2rem;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

nav.top-links {
  margin-bottom: 2rem;
}

nav.top-links a {
  margin-right: 1.25rem;
}

footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

.updated {
  color: var(--muted);
  font-size: 0.9rem;
}