:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #fdfdfd;
  --muted: #555;
  --link: #0645ad;
  --code-bg: #eee;
  --rule: #ccc;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8e8e8;
    --bg: #161616;
    --muted: #aaa;
    --link: #8ab4f8;
    --code-bg: #262626;
    --rule: #444;
  }
}

body {
  margin: 0 auto;
  padding: 0 1rem 2rem;
  max-width: 42rem;
  font-family: system-ui, sans-serif;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
}

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

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  position: static;
  display: block;
  padding: 0.5rem 0;
}

header h1 {
  margin-bottom: 0;
  font-size: 2.5rem;
}

header p {
  margin-top: 0.25rem;
  color: var(--muted);
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin: 1rem 0;
  padding: 0.75rem 0;
  list-style: none;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

h2 { margin-top: 2rem; }

pre, code {
  font-family: ui-monospace, monospace;
  background: var(--code-bg);
}

code { padding: 0 0.2em; }

pre {
  padding: 0.75rem 1rem;
  overflow-x: auto;
}

pre code { padding: 0; }

footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
}