:root {
  color-scheme: light dark;
}

body {
  max-width: 40rem;
  margin: 2rem auto;
  padding: 0 1rem;
  font-family: system-ui, sans-serif;
  line-height: 1.5;
}

nav a {
  margin-right: 1rem;
}

h1, h2, h3 {
  line-height: 1.2;
}

pre, code {
  font-family: ui-monospace, monospace;
}

pre {
  overflow-x: auto;
  padding: 0.75rem;
  border-radius: 4px;
}

@media (prefers-color-scheme: dark) {
  pre { background: #222; }
}

@media (prefers-color-scheme: light) {
  pre { background: #eee; }
}