:root { --brand: #04564E; --text: #1c1c1e; --muted: #6e6e73; --bg: #ffffff; }
@media (prefers-color-scheme: dark) {
  :root { --brand: #3fd0bf; --text: #f2f2f7; --muted: #a1a1a6; --bg: #000000; }
}
body { margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 32px 16px 64px; }
.brand { font-weight: 700; font-size: 20px; color: var(--brand); margin: 0 0 24px; }
.brand a { text-decoration: none; }
h1 { font-size: 34px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 32px 0 8px; }
h3 { font-size: 17px; margin: 20px 0 4px; }
.muted { color: var(--muted); }
a { color: var(--brand); }
ul { padding-left: 20px; }
li { margin: 6px 0; }