:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #1a1d24;
  background: #ffffff;
}
main, header, footer { max-width: 44rem; margin: 0 auto; padding: 0 1.25rem; }
header { padding-top: 1.5rem; padding-bottom: 0.5rem; }
header nav { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.95rem; }
header .brand { font-weight: 700; margin-right: auto; color: inherit; text-decoration: none; }
main { padding-top: 1rem; padding-bottom: 2rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 1.5rem 0 0.5rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.5rem; }
p, li { max-width: 40rem; }
a { color: #0b57d0; }
a:focus-visible { outline: 3px solid #0b57d0; outline-offset: 2px; }
.updated { color: #4a5160; font-size: 0.95rem; }
footer { padding-top: 1rem; padding-bottom: 3rem; color: #4a5160; font-size: 0.9rem; border-top: 1px solid #d7dae1; }
@media (prefers-color-scheme: dark) {
  body { color: #e8eaf0; background: #12141a; }
  a { color: #8ab4f8; }
  .updated, footer { color: #aab0bd; }
  footer { border-top-color: #2b303b; }
}