:root {
  --bg: #fbfaf7; --surface: #ffffff; --ink: #1b1d22; --muted: #565b66; --rule: #dcd8cf;
  --accent: #1f5f4a; --accent-ink: #ffffff; --code-bg: #f1eee7; --focus: #b3541e;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121417; --surface: #1a1d21; --ink: #ecebe6; --muted: #a9adb5; --rule: #2e3238;
    --accent: #7fcfaf; --accent-ink: #0e1a15; --code-bg: #20242a; --focus: #f0a46b; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 var(--sans); }
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; }
.skip:focus { left: 16px; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }
header.top { border-bottom: 1px solid var(--rule); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 16px; }
.brand { font-weight: 800; font-size: 1.35rem; letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
nav ul { list-style: none; display: flex; gap: 20px; margin: 0; padding: 0; }
main { padding: 48px 0 72px; }
h1 { font-size: clamp(2rem, 6vw, 3.1rem); line-height: 1.1; letter-spacing: -0.03em; margin: 0 0 16px; text-wrap: balance; }
h2 { font-size: 1.5rem; letter-spacing: -0.01em; margin: 56px 0 12px; }
h3 { font-size: 1.15rem; margin: 0 0 6px; }
p { max-width: 66ch; }
.lede { font-size: 1.2rem; color: var(--muted); }
.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); margin-top: 20px; }
.card { background: var(--surface); border: 1px solid var(--rule); border-radius: 10px; padding: 20px; }
.card p { margin: 6px 0 0; color: var(--muted); }
.tag { display: inline-block; font: 600 0.75rem/1 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); margin-bottom: 10px; }
code, pre { font-family: var(--mono); font-size: 0.9rem; }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }
pre { background: var(--code-bg); padding: 16px; border-radius: 8px; overflow-x: auto; line-height: 1.5; }
pre code { background: none; padding: 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
ul.ticks { padding-left: 20px; }
footer { border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.9rem; padding: 24px 0 40px; }
@media (max-width: 520px) { nav ul { gap: 14px; } body { font-size: 16px; } }