:root { --bg: #ffffff; --fg: #1c2430; --muted: #5a6676; --accent: #0b5cad; --line: #e3e7ec; --card: #f6f8fa; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f141a; --fg: #e6ebf1; --muted: #9aa6b4; --accent: #6cb1ff; --line: #263040; --card: #161d26; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; justify-content: space-between; padding-top: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
header .brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; color: var(--fg); text-decoration: none; }
nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }
main { padding-top: 24px; padding-bottom: 40px; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 8px 0 12px; }
h2 { font-size: 1.2rem; margin: 32px 0 8px; }
p, li { color: var(--fg); }
.lead { font-size: 1.1rem; color: var(--muted); }
.meta { color: var(--muted); font-size: .9rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px; margin: 16px 0; }
a { color: var(--accent); }
footer { padding-top: 16px; padding-bottom: 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
footer a { color: var(--muted); }