:root { --bg: #ffffff; --fg: #1d1f23; --muted: #5f6368; --line: #e4e6ea; --accent: #1a73e8; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #1f2125; --fg: #e8eaed; --muted: #9aa0a6; --line: #3c4043; --accent: #8ab4f8; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
header img { width: 48px; height: 48px; }
h1 { font-size: 28px; margin: 0; line-height: 1.2; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p, li { color: var(--fg); }
.muted { color: var(--muted); }
a { color: var(--accent); }
ul { padding-left: 22px; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }