:root {
  --text: #222;
  --bg: #fdfdfd;
  --accent: #0066cc;
  --muted: #666;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8e8e8;
    --bg: #1a1a1a;
    --accent: #6ab0ff;
    --muted: #999;
  }
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1rem;
}

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

nav a { margin-right: 1rem; }

footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--muted);
  color: var(--muted);
  font-size: 0.9rem;
}