:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #1f5fbf;
  --border: #e3e3e3;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111214; --fg: #e8e8e8; --muted: #a0a0a0; --accent: #7aa7ff; --border: #2a2c30; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
header, footer { border-color: var(--border); }
header { border-bottom: 1px solid var(--border); }
footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; }
.wrap { max-width: 760px; margin: 0 auto; padding: 16px; }
nav a { margin-right: 18px; color: var(--accent); text-decoration: none; }
nav a.active { font-weight: 600; text-decoration: underline; }
.brand { font-weight: 700; margin-right: 24px; color: var(--fg); text-decoration: none; }
main { padding: 24px 16px 48px; }
h1 { font-size: 30px; margin: 0 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
.meta { color: var(--muted); margin-bottom: 24px; }
a { color: var(--accent); }
ul { padding-left: 22px; }
table { border-collapse: collapse; width: 100%; margin: 12px 0; }
th, td { text-align: left; border-bottom: 1px solid var(--border); padding: 8px 6px; vertical-align: top; }
code { background: rgba(127,127,127,.12); padding: 1px 5px; border-radius: 4px; }
.note { border-left: 3px solid var(--accent); padding: 8px 14px; background: rgba(127,127,127,.06); }