:root {
  --ink: #172b4d; --muted: #5e6c84; --line: #dfe1e6; --bg: #ffffff;
  --accent: #0c66e4; --soft: #f4f5f7; --warn-bg: #fff7d6; --warn-line: #e2b203;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #e6e9ef; --muted: #9aa5b5; --line: #2c3442; --bg: #161a22; --accent: #579dff; --soft: #1f2530; --warn-bg: #3a3218; --warn-line: #b8931a; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: var(--bg); }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; align-items: center; justify-content: space-between; }
header a.brand { font-weight: 600; text-decoration: none; color: var(--ink); }
nav a { color: var(--muted); text-decoration: none; margin-left: 1.25rem; }
nav a[aria-current] { color: var(--accent); font-weight: 600; }
.wrap { max-width: 760px; margin: 0 auto; padding: 1.25rem 1.25rem; }
main.wrap { padding-top: 2rem; padding-bottom: 4rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .25rem; }
h2 { font-size: 1.35rem; margin: 2.25rem 0 .5rem; border-bottom: 1px solid var(--line); padding-bottom: .25rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 .25rem; }
p.lede { color: var(--muted); font-size: 1.1rem; margin-top: 0; }
p.meta { color: var(--muted); font-size: .9rem; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .95rem; }
th, td { text-align: left; vertical-align: top; padding: .5rem .6rem; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
code { background: var(--soft); padding: .1em .35em; border-radius: 4px; font-size: .92em; }
.callout { background: var(--soft); border-left: 4px solid var(--accent); padding: .75rem 1rem; margin: 1.25rem 0; }
.callout.warn { background: var(--warn-bg); border-left-color: var(--warn-line); }
ol.steps li { margin-bottom: .75rem; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
a { color: var(--accent); }
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin: 1.5rem 0; }
.card { border: 1px solid var(--line); border-radius: 8px; padding: 1rem; }
.card h3 { margin-top: 0; }
.card a { text-decoration: none; }