:root { color-scheme: light dark; --bg: #fff; --text: #16161a; --muted: #5b5b66; --line: #e4e4e8; --accent: #17996a; }
@media (prefers-color-scheme: dark) { :root { --bg: #000; --text: #f5f5f7; --muted: #a1a1aa; --line: #26262b; --accent: #22c55e; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 40px 20px 64px; }
header { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
header img { width: 48px; height: 48px; }
header b { font-size: 20px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.02em; }
h2 { font-size: 19px; margin: 32px 0 8px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
a { color: var(--accent); }
ul { padding-left: 20px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0 16px; }