:root {
  color-scheme: light;
  --background: #f7f9fb;
  --surface: #ffffff;
  --text: #18202a;
  --muted: #5d6875;
  --border: #dfe6ee;
  --accent: #1e6f8f;
  --accent-strong: #15506a;
  --max-width: 920px;
}

* {
  box-sizing: border-box;
}

html {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--background);
}

body {
  margin: 0;
  min-width: 320px;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-strong);
}

a:focus-visible {
  outline: 3px solid rgba(30, 111, 143, 0.35);
  outline-offset: 4px;
  border-radius: 4px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 24px 12px;
}

.brand {
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.95rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a[aria-current="page"] {
  color: var(--text);
  font-weight: 700;
}

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 56px 24px 72px;
}

.hero {
  padding: 40px 0 48px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 0.9rem;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 20px;
  font-size: clamp(2.25rem, 8vw, 4rem);
  line-height: 1.15;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(1.35rem, 4vw, 1.8rem);
  line-height: 1.3;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.2rem;
  line-height: 1.35;
}

p {
  margin-bottom: 16px;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1.05rem, 3vw, 1.25rem);
}

.section {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.card {
  max-width: 680px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.text-link {
  font-weight: 700;
}

.link-list {
  display: grid;
  gap: 12px;
}

.link-list h2 {
  margin-bottom: 4px;
}

.document .section {
  max-width: 760px;
}

.updated {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 32px;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-top: 22px;
  }

  .page {
    padding-top: 28px;
  }

  .hero {
    padding-top: 20px;
  }

  .card {
    padding: 20px;
  }
}