:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  line-height: 1.75;
}

body {
  margin: 0;
  padding: 32px 18px;
  background: #f7f8fb;
  color: #18202b;
}

main {
  max-width: 820px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid #e4e8ef;
  border-radius: 12px;
  padding: 28px;
}

h1 {
  margin-top: 0;
  font-size: 28px;
  line-height: 1.35;
}

h2 {
  margin-top: 28px;
  font-size: 20px;
}

a {
  color: #0366d6;
}

li + li {
  margin-top: 6px;
}

@media (prefers-color-scheme: dark) {
  body {
    background: #10151d;
    color: #e8edf5;
  }

  main {
    background: #161d27;
    border-color: #2b3645;
  }

  a {
    color: #66b6ff;
  }
}