:root { --bg: #ffffff; --fg: #1d1d1f; --muted: #5f6368; --rule: #e3e3e3; --link: #0b57d0; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #141414; --fg: #ececec; --muted: #a8a8a8; --rule: #2e2e2e; --link: #8ab4f8; }
}
html { background: var(--bg); color: var(--fg); }
body { font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
       max-width: 44rem; margin: 0 auto; padding: 2.5rem 1rem 4rem; }
h1 { font-size: 1.6rem; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 .5rem; }
p, li { margin: .4rem 0; }
.muted { color: var(--muted); }
nav { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); }
nav a { margin-right: 1.25rem; }
a { color: var(--link); }