:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --border: #e5e5e5;
  --link: #4f46e5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #ececec;
    --muted: #9a9a9a;
    --border: #2a2a2a;
    --link: #a5b4fc;
  }
}

* {
  box-sizing: border-box;
}

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

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

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

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

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

.updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 2em;
}

a {
  color: var(--link);
}

nav.top {
  display: flex;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

nav.top a {
  text-decoration: none;
  font-weight: 600;
}

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