:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --link: #0066cc;
  --rule: #e5e5ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --link: #2997ff;
    --rule: #2c2c2e;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 80px; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 21px; margin: 36px 0 8px; }
p, ul { margin: 0 0 14px; }
ul { padding-left: 22px; }
li { margin-bottom: 6px; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
.meta { color: var(--muted); margin-bottom: 28px; }
nav { margin-bottom: 32px; font-size: 15px; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--rule); color: var(--muted); font-size: 15px; }