:root {
  color-scheme: light dark;
  --background: #f6f8fb;
  --surface: #ffffff;
  --text: #172333;
  --muted: #536278;
  --link: #1557a6;
  --border: #dce3ec;
  --tint: #eaf1fa;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.65;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--background); color: var(--text); }
a { color: var(--link); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 0.14em; }
a:focus-visible { outline: 3px solid var(--link); outline-offset: 4px; }
.site-header, main, footer { width: min(100% - 2.5rem, 48rem); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 1.5rem; border-bottom: 1px solid var(--border); }
.wordmark { font-weight: 750; font-size: 1.15rem; color: var(--text); text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.95rem; }
main { padding-block: clamp(2.5rem, 7vw, 5rem); }
.eyebrow { margin: 0 0 0.5rem; color: var(--link); font-size: 0.8rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(2.4rem, 7vw, 4rem); line-height: 1.1; letter-spacing: -0.04em; overflow-wrap: anywhere; }
.lead { margin: 1.25rem 0 2.5rem; max-width: 42rem; color: var(--muted); font-size: clamp(1.12rem, 2.8vw, 1.35rem); }
h2 { margin: 0 0 0.65rem; font-size: 1.2rem; line-height: 1.35; letter-spacing: -0.015em; }
section { margin-top: 2.5rem; }
p { margin: 0.8rem 0 0; }
code { overflow-wrap: anywhere; font-size: 0.9em; padding: 0.12rem 0.3rem; border-radius: 0.25rem; background: var(--tint); }
.callout { padding: 1.5rem; background: var(--surface); border: 1px solid var(--border); border-radius: 0.75rem; }
.updated { color: var(--muted); font-size: 0.9rem; }
footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem; padding-block: 1.5rem 2rem; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
.skip-link { position: fixed; top: 0.5rem; left: 0.5rem; padding: 0.75rem 1rem; background: var(--surface); transform: translateY(-200%); z-index: 1; }
.skip-link:focus { transform: translateY(0); }
@media (prefers-color-scheme: dark) {
  :root { --background: #111923; --surface: #192330; --text: #e5edf7; --muted: #a8b8cd; --link: #91bfff; --border: #304155; --tint: #243650; }
}
@media (max-width: 400px) {
  .site-header { align-items: flex-start; }
  nav { flex-direction: column; gap: 0.3rem; }
}