:root {
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --bg: #ffffff;
  --card: #f4f4f6;
  --accent: #0a6cff;
  --rule: #e2e2e6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #f2f2f7;
    --muted: #a0a0a8;
    --bg: #111113;
    --card: #1c1c1f;
    --accent: #4d9bff;
    --rule: #2c2c30;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { padding-top: 24px; padding-bottom: 12px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; border-bottom: 1px solid var(--rule); }
header a.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; color: var(--fg); text-decoration: none; }
header a.brand img { width: 60px; height: 60px; border-radius: 22%; display: block; }
nav a { margin-left: 16px; color: var(--accent); text-decoration: none; }
nav a:hover { text-decoration: underline; }
main { padding-top: 28px; padding-bottom: 40px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.3rem; margin: 2rem 0 0.5rem; }
h3 { font-size: 1.05rem; margin: 1.4rem 0 0.3rem; }
p, li { margin: 0.5rem 0; }
a { color: var(--accent); }
.updated { color: var(--muted); font-size: 0.9rem; }
.card { background: var(--card); border-radius: 14px; padding: 4px 18px 12px; margin: 1.2rem 0; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.95rem; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--rule); }
th { color: var(--muted); font-weight: 600; }
footer { padding-top: 16px; padding-bottom: 40px; color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--rule); }
footer a { color: var(--muted); margin-right: 14px; }