:root {
  --bg: #ffffff; --text: #1a1a1a; --muted: #5a5a5a; --border: #e2e2e2; --accent: #123A5C;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14181d; --text: #e8e8e8; --muted: #9aa0a6; --border: #2a2f36; --accent: #6fb1e8; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.65; font-size: 17px;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 40px 20px 80px; }
h1 { font-size: 26px; margin-bottom: 4px; }
h2 { font-size: 19px; margin-top: 2em; border-top: 1px solid var(--border); padding-top: 1.2em; }
p, li { color: var(--text); }
.updated { color: var(--muted); font-size: 14px; margin-bottom: 2em; }
nav.crumbs { font-size: 14px; margin-bottom: 2em; }
nav.crumbs a { color: var(--accent); text-decoration: none; margin-right: 14px; }
nav.crumbs a:hover { text-decoration: underline; }
a { color: var(--accent); }
code { background: rgba(127,127,127,0.15); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.callout {
  border: 1px solid var(--border); border-left: 4px solid var(--accent);
  padding: 14px 18px; border-radius: 6px; margin: 1.5em 0; background: rgba(127,127,127,0.06);
}
footer { margin-top: 3em; color: var(--muted); font-size: 13px; }
ul { padding-left: 22px; }