body {
  font-family: sans-serif;
  margin: 1em 2em;
  line-height: 1.6;
  color: #222;
  background: #fff;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #ddd;
    background: #1e1e1e;
  }
}

h1 {
  font-size: 1.4em;
}