:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1f2430;
  --muted: #5d6474;
  --line: #e4e1d8;
  --accent: #2458c6;
  --accent-soft: #eef3fd;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171c;
    --surface: #1d2027;
    --ink: #e9eaee;
    --muted: #a3a9b6;
    --line: #2e323b;
    --accent: #8fb0ff;
    --accent-soft: #232b3d;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 20px; }
header { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: baseline; justify-content: space-between; padding-top: 28px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 20px; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
nav { display: flex; gap: 18px; font-size: 15px; }
nav a { color: var(--muted); text-decoration: none; }
nav a[aria-current="page"], nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }
main { padding-top: 36px; padding-bottom: 48px; }
h1 { font-size: 34px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 12px; }
h2 { font-size: 21px; margin: 36px 0 8px; letter-spacing: -0.01em; }
p, li { color: var(--ink); }
.lede { font-size: 19px; color: var(--muted); margin-top: 0; }
.updated { color: var(--muted); font-size: 15px; margin-top: 0; }
.note { background: var(--accent-soft); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin: 24px 0; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
code { font: 15px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--surface); border: 1px solid var(--line); border-radius: 5px; padding: 1px 5px; overflow-wrap: anywhere; }
footer { border-top: 1px solid var(--line); padding-top: 18px; padding-bottom: 40px; color: var(--muted); font-size: 15px; }
footer p { color: var(--muted); margin: 4px 0; }