:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  margin: 0 auto; max-width: 46rem; padding: 2rem 1.25rem 4rem;
  font: 16px/1.6 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
header nav a { margin-right: 1rem; text-decoration: none; }
header nav { padding-bottom: 1rem; border-bottom: 1px solid #8884; }
h1 { font-size: 1.6rem; margin: 1.5rem 0 1rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
ul { padding-left: 1.2rem; }
footer { margin-top: 3rem; color: #888; font-size: .9rem; }