body {
  max-width: 42rem;
  margin: 0 auto;
  padding: 3rem 1.25rem;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #222;
  background: #fff;
}

header {
  margin-bottom: 2.5rem;
}

h1,
h2 {
  line-height: 1.2;
}

h1 {
  margin: 0;
  font-size: 2rem;
}

h2 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
}

p {
  margin: 0 0 1rem;
}

section {
  margin-top: 2.5rem;
}

ul {
  margin: 0;
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.25rem;
}

a {
  color: #0645ad;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

footer {
  margin-top: 3rem;
  color: #666;
  font-size: 0.9rem;
}

footer p {
  margin-bottom: 0;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #eee;
    background: #181818;
  }

  a {
    color: #8ab4f8;
  }

  footer {
    color: #aaa;
  }
}