:root { --bg: #f7f8fc; --fg: #16181d; --muted: #5b6070; --link: #3b5bdb; --line: #dde1ea; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #11151f; --fg: #e8eaf0; --muted: #a3a9b8; --link: #8ea6ff; --line: #2a3140; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 64px; }
nav { font-size: 15px; color: var(--muted); margin-bottom: 8px; }
section { border-top: 1px solid var(--line); padding-top: 16px; margin-top: 24px; }
h1 { font-size: 28px; line-height: 1.25; margin: 8px 0; }
h2 { font-size: 20px; margin: 28px 0 8px; }
.meta { color: var(--muted); font-size: 15px; }
a { color: var(--link); }
li { margin: 6px 0; }