:root { --bg: #ffffff; --fg: #1d1d1f; --muted: #6e6e73; --accent: #0b3d91; --card: #f5f5f7; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1426; --fg: #f2f2f7; --muted: #a1a1aa; --accent: #ffd60a; --card: #14213d; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 20px 64px; }
header { display: flex; gap: 16px; align-items: center; margin-bottom: 24px; }
header img { width: 64px; height: 64px; border-radius: 14px; }
header a { color: inherit; text-decoration: none; }
h1 { font-size: 28px; margin: 0; }
h2 { font-size: 21px; margin-top: 32px; }
h3 { font-size: 18px; margin-top: 24px; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: 15px; }
.card { background: var(--card); border-radius: 14px; padding: 16px 20px; margin: 16px 0; }
nav { display: flex; gap: 20px; flex-wrap: wrap; margin: 8px 0 24px; }
hr { border: 0; border-top: 1px solid var(--muted); opacity: .3; margin: 40px 0; }
footer { margin-top: 48px; }