:root {
  --ink: #17212b;
  --navy: #17324d;
  --navy-deep: #0d2235;
  --blue: #245f86;
  --teal: #327f83;
  --gold: #c59a43;
  --cream: #f5f2ea;
  --paper: #ffffff;
  --mist: #eaf0f3;
  --line: #ccd7de;
  --muted: #5d6b76;
  --shadow: 0 12px 28px rgba(13, 34, 53, .10);
  --radius: 14px;
  --content: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 17px/1.6 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: var(--blue); }
a:hover { color: var(--navy-deep); }
img { max-width: 100%; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 999; padding: .7rem 1rem; background: #fff; color: #000; border: 2px solid #000; }
.skip-link:focus { top: 1rem; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.header-inner { width: min(var(--content), calc(100% - 2rem)); margin: auto; min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { display: flex; align-items: center; gap: .8rem; color: var(--navy); text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 50px; height: 50px; border-radius: 12px; color: #fff; background: linear-gradient(135deg, var(--navy), var(--teal)); font-weight: 800; letter-spacing: .04em; }
.brand-copy { display: grid; line-height: 1.25; }
.brand-copy small { color: var(--muted); }
.primary-nav { display: flex; gap: 1.25rem; }
.primary-nav a { color: var(--navy); text-decoration: none; font-weight: 650; }
.nav-toggle { display: none; font-size: 1.5rem; border: 0; background: none; color: var(--navy); }
.hero { color: #fff; background: radial-gradient(circle at 82% 18%, rgba(50,127,131,.72), transparent 34%), linear-gradient(135deg, var(--navy-deep), var(--navy)); }
.hero-inner { width: min(var(--content), calc(100% - 2rem)); min-height: 620px; margin: auto; display: grid; grid-template-columns: 1.45fr .8fr; gap: clamp(2rem, 6vw, 6rem); align-items: center; padding: 5rem 0; }
.eyebrow { margin: 0 0 .45rem; color: var(--gold); font-size: .82rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.18; color: var(--navy-deep); }
h1 { margin: 0; color: #fff; font-size: clamp(2.5rem, 5.4vw, 5.2rem); letter-spacing: -.035em; }
h2 { margin: .2rem 0 1rem; font-size: clamp(2rem, 3.4vw, 3.2rem); letter-spacing: -.025em; }
h3 { margin-top: 0; }
.hero-lede { max-width: 760px; font-size: 1.25rem; color: #dbe7ed; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button { display: inline-block; padding: .8rem 1.15rem; border-radius: 9px; text-decoration: none; font-weight: 750; }
.button-primary { color: var(--navy-deep); background: var(--gold); }
.button-primary:hover { color: var(--navy-deep); background: #dbb65e; }
.button-secondary { color: #fff; border: 1px solid rgba(255,255,255,.6); }
.button-secondary:hover { color: #fff; background: rgba(255,255,255,.1); }
.hero-card { padding: 1.5rem; border: 1px solid rgba(255,255,255,.25); border-radius: var(--radius); background: rgba(255,255,255,.08); box-shadow: var(--shadow); }
.hero-card h2 { color: #fff; font-size: 1.35rem; }
.hero-card dl { margin: 0; }
.hero-card dl div { display: grid; grid-template-columns: 70px 1fr; gap: .8rem; padding: .75rem 0; border-top: 1px solid rgba(255,255,255,.18); }
.hero-card dt { color: var(--gold); font-weight: 850; }
.hero-card dd { margin: 0; color: #edf4f6; }
.section { padding: 5.5rem max(1rem, calc((100% - var(--content))/2)); }
.section-tinted { background: var(--cream); }
.section-dark { color: #e6eef2; background: var(--navy-deep); }
.section-heading { max-width: 820px; margin-bottom: 2.6rem; }
.section-heading > p:last-child { color: var(--muted); font-size: 1.08rem; }
.section-heading.light h2 { color: #fff; }
.card-grid, .artifact-grid, .rule-grid { display: grid; gap: 1.2rem; }
.card-grid.three { grid-template-columns: repeat(3, 1fr); }
.card, .artifact-grid article { padding: 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.artifact-grid { grid-template-columns: repeat(4, 1fr); }
.artifact-grid article { box-shadow: none; }
.process-list { display: grid; gap: 1rem; margin: 0; padding: 0; list-style: none; }
.process-list li { display: grid; grid-template-columns: 82px 1fr; gap: 1.2rem; padding: 1.4rem; border-radius: var(--radius); background: #fff; border: 1px solid #ded9cc; }
.step-number { color: var(--teal); font-size: 1.65rem; font-weight: 850; }
.process-list h3 { margin-bottom: .35rem; }
.process-list p { margin: .3rem 0; }
.output { color: var(--muted); }
.rule-grid { grid-template-columns: repeat(3, 1fr); }
.rule-grid article { padding: 1.25rem; border-top: 3px solid var(--gold); background: rgba(255,255,255,.06); }
.rule-grid h3 { color: #fff; }
.checklist-layout { display: grid; grid-template-columns: 1.4fr .8fr; gap: 2rem; }
.checklist { display: grid; gap: .55rem; }
.checklist label { padding: .8rem 1rem; border: 1px solid var(--line); border-radius: 9px; background: #fff; }
.checklist input { width: 1.15rem; height: 1.15rem; margin-right: .7rem; accent-color: var(--teal); }
.text-button { width: fit-content; margin-top: .5rem; padding: .55rem .8rem; border: 1px solid var(--navy); border-radius: 8px; background: #fff; color: var(--navy); font-weight: 700; cursor: pointer; }
.reference-card { align-self: start; padding: 1.5rem; border-radius: var(--radius); background: var(--mist); }
.reference-card ul { padding-left: 1.25rem; }
.site-footer { display: flex; justify-content: space-between; gap: 2rem; padding: 2.2rem max(1rem, calc((100% - var(--content))/2)); color: #d9e3e8; background: #081925; }
.site-footer p { margin: .2rem 0 0; }
.site-footer a { color: #fff; }
@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .primary-nav { display: none; position: absolute; top: 78px; left: 0; right: 0; flex-direction: column; padding: 1rem; background: #fff; border-bottom: 1px solid var(--line); }
  .primary-nav.open { display: flex; }
  .hero-inner, .checklist-layout { grid-template-columns: 1fr; }
  .card-grid.three, .rule-grid { grid-template-columns: 1fr 1fr; }
  .artifact-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  body { font-size: 16px; }
  .brand-copy small { display: none; }
  .hero-inner { min-height: auto; padding: 4rem 0; }
  .card-grid.three, .artifact-grid, .rule-grid { grid-template-columns: 1fr; }
  .process-list li { grid-template-columns: 1fr; }
  .step-number { font-size: 1.2rem; }
  .site-footer { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }