:root {
  --bg: #f2f2f7;
  --card: #ffffff;
  --ink: #1c1c1e;
  --muted: #6c6c70;
  --accent: #007aff;
  --rule: #e5e5ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --ink: #f2f2f7;
    --muted: #98989f;
    --accent: #0a84ff;
    --rule: #38383a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  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: 40px 16px 64px;
}
header { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
header img { width: 48px; height: 48px; border-radius: 11px; }
header a { color: var(--ink); text-decoration: none; font-weight: 600; font-size: 20px; }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 4px; letter-spacing: -0.5px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
.updated { color: var(--muted); margin: 0 0 24px; font-size: 15px; }
.card { background: var(--card); border-radius: 16px; padding: 20px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 20px; margin: 0 0 12px; }
a { color: var(--accent); }
nav { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--rule); color: var(--muted); font-size: 15px; display: flex; gap: 16px; flex-wrap: wrap; }
nav a { color: var(--muted); }