:root { --bg: #f7f8fb; --fg: #1d2333; --muted: #5d6578; --line: #dfe3ec; --card: #ffffff; --link: #1f5fd6; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #11141c; --fg: #e8ebf2; --muted: #a3abbd; --line: #2a3040; --card: #181c27; --link: #7aa7ff; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 1.8rem; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 1.2rem; margin: 32px 0 8px; }
h3 { margin: 0 0 4px; }
a { color: var(--link); }
.lead { font-size: 1.15rem; color: var(--muted); }
.meta, .crumb { color: var(--muted); font-size: 0.9rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; }
ul { padding-left: 20px; }
li { margin: 6px 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }