:root { color-scheme: light dark; --accent: #1f9d55; }
* { box-sizing: border-box; }
body {
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  margin: 0; padding: 0 20px 60px; background: Canvas; color: CanvasText;
}
main { max-width: 720px; margin: 0 auto; }
header { padding: 40px 0 8px; }
header a.brand { font-weight: 700; font-size: 1.25rem; color: inherit; text-decoration: none; }
nav { margin-top: 6px; }
nav a { margin-right: 16px; color: var(--accent); text-decoration: none; font-weight: 500; }
nav a:hover { text-decoration: underline; }
h1 { font-size: 2rem; line-height: 1.2; margin: 28px 0 6px; }
h2 { font-size: 1.25rem; margin: 32px 0 6px; }
p, li { color: inherit; }
ul { padding-left: 1.25rem; }
a { color: var(--accent); }
.updated, .muted { opacity: .65; font-size: .9rem; }
.card { border: 1px solid color-mix(in srgb, CanvasText 18%, transparent); border-radius: 12px; padding: 14px 18px; margin: 18px 0; }
footer { margin-top: 48px; opacity: .65; font-size: .9rem; }