:root { --bg:#ffffff; --fg:#111827; --muted:#6b7280; --accent:#1B6FC2; --card:#f3f6fa; }
@media (prefers-color-scheme: dark) { :root { --bg:#0B1F3A; --fg:#f3f6fa; --muted:#9fb0c7; --accent:#5CC3FF; --card:#132a4a; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--fg); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 80px; }
h1 { font-size: 2rem; line-height:1.2; margin: 0 0 .25em; }
h2 { font-size: 1.25rem; margin: 2em 0 .5em; }
p, li { max-width: 62ch; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.brand { display:flex; align-items:center; gap:12px; margin-bottom: 32px; }
.brand img { width:48px; height:48px; border-radius:11px; }
.card { background: var(--card); border-radius: 12px; padding: 16px 20px; margin: 1em 0; }
footer { margin-top: 64px; color: var(--muted); font-size: .9rem; }