:root {
  --ink: #001827;
  --body: #3d5163;
  --muted: #6f7a87;
  --line: #e2e9ef;
  --blue: #1181c8;
  --bg: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root { --ink:#e8f4fb; --body:#b9c9d6; --muted:#8899a6; --line:#1e3b4c; --bg:#071722; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 48px 22px 80px; }
header { border-bottom: 1px solid var(--line); padding-bottom: 18px; margin-bottom: 34px; }
.brand { font-size: 20px; font-weight: 800; color: var(--ink); text-decoration: none; letter-spacing: -0.4px; }
nav { margin-top: 10px; display: flex; gap: 16px; flex-wrap: wrap; }
nav a { color: var(--blue); text-decoration: none; font-size: 14px; font-weight: 600; }
nav a:hover { text-decoration: underline; }
h1 { color: var(--ink); font-size: 30px; line-height: 1.2; letter-spacing: -0.6px; margin: 0 0 6px; }
h2 { color: var(--ink); font-size: 19px; margin: 34px 0 8px; letter-spacing: -0.2px; }
h3 { color: var(--ink); font-size: 16px; margin: 22px 0 6px; }
.updated { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
a { color: var(--blue); }
code { background: rgba(127,127,127,.14); padding: 1px 5px; border-radius: 4px; font-size: 90%; }
.callout { border: 1px solid var(--line); border-left: 3px solid var(--blue); border-radius: 8px; padding: 14px 16px; margin: 22px 0; }
footer { border-top: 1px solid var(--line); margin-top: 56px; padding-top: 18px; color: var(--muted); font-size: 14px; }
footer a { color: var(--blue); text-decoration: none; }