:root { --bg: #f6f7f9; --surface: #fff; --text: #13151a; --muted: #6b7180; --border: #e4e6eb; --brand: #4f46e5; color-scheme: light; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d0f13; --surface: #15181e; --text: #eceef2; --muted: #8e95a3; --border: #262b34; --brand: #7c74ff; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.7 "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
header { border-bottom: 1px solid var(--border); background: var(--surface); }
header .in, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header .in { display: flex; align-items: center; gap: 10px; height: 64px; }
.logo { width: 32px; height: 32px; border-radius: 10px; background: linear-gradient(135deg, #4f46e5, #7c3aed); }
header b { font-size: 18px; }
header a { color: inherit; text-decoration: none; display: flex; align-items: center; gap: 10px; }
main { padding-top: 40px; padding-bottom: 40px; }
h1 { font-size: 32px; line-height: 1.2; letter-spacing: -.02em; margin: 0 0 6px; }
.updated { color: var(--muted); margin: 0 0 32px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
a { color: var(--brand); }
ul, ol { padding-left: 22px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 18px 22px; margin: 20px 0; }
footer { color: var(--muted); font-size: 14px; padding-top: 24px; padding-bottom: 40px; border-top: 1px solid var(--border); display: flex; gap: 16px; flex-wrap: wrap; }