:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #172033;
  --muted: #4b5563;
  --brand: #0f4c81;
  --brand-2: #0a6a6f;
  --border: #dbe2ea;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--brand); }

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid #2563eb;
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: #111827;
  color: #fff;
  padding: .6rem .8rem;
  z-index: 10;
}

.skip-link:focus {
  left: .5rem;
  top: .5rem;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 3;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .8rem 0;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}

.main-menu {
  display: none;
  gap: .9rem;
}

.main-menu.is-open {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.main-menu a {
  text-decoration: none;
  padding: .35rem .55rem;
  border-radius: .45rem;
}

.main-menu a.active {
  background: #e8f1fb;
  color: #09345a;
}

.menu-toggle {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: .4rem;
  padding: .45rem .7rem;
}

.hero {
  display: grid;
  gap: 1rem;
  align-items: center;
  padding: 1.5rem 0;
}

.hero img {
  width: 100%;
  height: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .8rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--brand-2);
  font-weight: 600;
  font-size: .85rem;
}

.btn {
  display: inline-block;
  margin-top: .7rem;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  padding: .6rem .95rem;
  border-radius: .5rem;
}

.btn-secondary { background: var(--brand-2); }

.notice,
.toc,
.cta,
.card,
details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .8rem;
  padding: 1rem;
}

.toc ol,
.list-links {
  padding-left: 1.2rem;
}

.card-grid {
  display: grid;
  gap: .9rem;
}

.card h3 { margin-top: 0; }

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 0;
  margin: 0 0 1rem;
}

.breadcrumbs li::after {
  content: '/';
  margin-left: .5rem;
  color: var(--muted);
}

.breadcrumbs li:last-child::after { content: ''; }

.faq-list {
  display: grid;
  gap: .7rem;
}

summary {
  cursor: pointer;
  font-weight: 600;
}

.site-footer {
  margin-top: 2rem;
  background: #0d2234;
  color: #dce6ef;
  padding: 1.5rem 0;
}

.site-footer a { color: #c2dcff; }

.footer-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .menu-toggle { display: none; }

  .main-menu {
    display: flex;
  }

  .main-menu.is-open {
    width: auto;
    flex-direction: row;
  }

  .hero {
    grid-template-columns: 1.1fr .9fr;
    padding: 2rem 0;
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}