:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #52606d;
  --paper: #fbfcfe;
  --panel: #ffffff;
  --line: #d8e0e8;
  --accent: #2b5876;
  --accent-strong: #183b56;
  --warm: #c98b2e;
  --max: 70rem;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 1rem/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: var(--accent-strong); text-underline-offset: .18em; }
a:hover { color: #8a5515; }
a:focus-visible { outline: 3px solid var(--warm); outline-offset: 3px; border-radius: .15rem; }
.skip-link { position: absolute; left: -9999px; top: 0; }
.skip-link:focus { left: 1rem; top: 1rem; z-index: 10; background: white; padding: .7rem 1rem; }
header { border-bottom: 1px solid var(--line); background: rgba(255,255,255,.95); }
.nav { max-width: var(--max); margin: auto; padding: 1rem 1.25rem; display: flex; gap: 1rem 2rem; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: .7rem; font-weight: 750; text-decoration: none; letter-spacing: .02em; }
.brand-mark { width: 2.1rem; height: 2.1rem; display: grid; place-items: center; border: 2px solid var(--accent); border-radius: 50%; color: var(--accent); }
nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: .5rem 1.25rem; flex-wrap: wrap; }
nav a { text-decoration: none; font-weight: 620; }
main { max-width: var(--max); margin: auto; padding: 3rem 1.25rem 4rem; }
.hero { max-width: 51rem; padding: 2.5rem 0 3rem; }
.eyebrow { color: var(--accent); text-transform: uppercase; font-size: .78rem; letter-spacing: .14em; font-weight: 760; }
h1, h2, h3 { line-height: 1.18; color: #142f43; }
h1 { font-size: clamp(2.35rem, 6vw, 4.8rem); margin: .35rem 0 1rem; letter-spacing: -.035em; }
h2 { font-size: clamp(1.55rem, 3vw, 2.25rem); margin-top: 2.4rem; }
h3 { font-size: 1.15rem; margin-bottom: .3rem; }
.lede { font-size: clamp(1.12rem, 2vw, 1.35rem); color: var(--muted); max-width: 44rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: .8rem; padding: 1.35rem; box-shadow: 0 8px 24px rgba(25, 50, 70, .05); }
.card h2, .card h3 { margin-top: 0; }
.notice { border-left: .3rem solid var(--warm); background: #fff9ee; padding: 1rem 1.2rem; margin: 1.5rem 0; }
.sample { border: 1px solid var(--line); border-radius: .65rem; padding: 1rem 1.15rem; background: #f4f7fa; }
dl { display: grid; grid-template-columns: minmax(8rem, 12rem) 1fr; gap: .55rem 1.2rem; }
dt { font-weight: 730; }
dd { margin: 0; }
footer { border-top: 1px solid var(--line); color: var(--muted); }
.footer-inner { max-width: var(--max); margin: auto; padding: 1.5rem 1.25rem 2.5rem; display: flex; gap: 1rem 2rem; justify-content: space-between; flex-wrap: wrap; }
.footer-inner ul { list-style: none; display: flex; flex-wrap: wrap; gap: 1rem; padding: 0; margin: 0; }
.policy { max-width: 52rem; }
.policy > p:first-of-type { color: var(--muted); }
code { font-size: .92em; background: #edf2f6; padding: .12em .32em; border-radius: .25rem; }
@media (max-width: 42rem) {
  main { padding-top: 2rem; }
  .hero { padding-top: 1rem; }
  dl { grid-template-columns: 1fr; gap: .15rem; }
  dd { margin-bottom: .7rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }