body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
  margin: 0 auto;
  padding: 1rem;
  max-width: 38rem;
  line-height: 1.5;
  color-scheme: light dark;
}
nav {
  margin-bottom: 1.5rem;
}
nav a {
  margin-right: 0.75rem;
}
nav a, a {
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}
a:hover, a:focus {
  text-decoration: underline;
}
h1 {
  font-weight: 700;
  font-size: 1.75rem;
  margin-top: 0;
}
footer {
  margin-top: 2rem;
  font-size: 0.9rem;
}
@media (prefers-color-scheme: light) {
  body { color: #111; }
  a { color: #0056b3; }
}
@media (prefers-color-scheme: dark) {
  body { color: #eee; }
  a { color: #6bb6ff; }
}