:root {
  color-scheme: light dark;
  --bg: #ffffff; --fg: #16181d; --muted: #5b6169; --border: #e4e6ea;
  --accent: #2a78d6; --surface: #f7f8fa;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16181b; --fg: #f2f3f5; --muted: #9aa1a9; --border: #2c3036;
          --accent: #6fa8f5; --surface: #1e2126; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 46rem; margin: 0 auto; padding: 3rem 1.5rem 5rem; }
header { border-bottom: 1px solid var(--border); }
header .wrap { padding: 1.1rem 1.5rem; display: flex; gap: 1.25rem; align-items: baseline; }
header a { color: var(--muted); text-decoration: none; font-size: .9rem; }
header a:hover { color: var(--fg); }
header .brand { color: var(--fg); font-weight: 650; font-size: 1rem; margin-right: auto; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .4rem; letter-spacing: -.02em; }
h2 { font-size: 1.15rem; margin: 2.4rem 0 .6rem; letter-spacing: -.01em; }
h3 { font-size: 1rem; margin: 1.6rem 0 .4rem; }
p, li { color: var(--fg); }
.lede { color: var(--muted); margin: 0 0 2rem; }
.updated { color: var(--muted); font-size: .85rem; }
a { color: var(--accent); }
code { background: var(--surface); padding: .12em .4em; border-radius: 4px; font-size: .88em; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .93rem; }
th, td { text-align: left; padding: .55rem .7rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.callout {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 1rem 1.15rem; margin: 1.5rem 0;
}
.callout p:first-child { margin-top: 0; } .callout p:last-child { margin-bottom: 0; }
footer { border-top: 1px solid var(--border); margin-top: 4rem; }
footer .wrap { padding: 1.5rem; color: var(--muted); font-size: .85rem; }