:root { --bg: #ffffff; --fg: #1c1c1e; --muted: #6e6e73; --accent: #e82e33; --line: #e5e5ea; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #0e0e10; --fg: #f2f2f7; --muted: #a1a1a6; --line: #2c2c2e; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 80px; }
h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 21px; margin: 36px 0 8px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.icon { width: 96px; height: 96px; border-radius: 22px; display: block; margin-bottom: 20px; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 15px; }