:root {
  color-scheme: light dark;
  --background: #eef8f9;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --text: #0b2730;
  --muted: #506b73;
  --border: #c8dfe3;
  --primary: #007c91;
  --primary-strong: #005e70;
  --primary-soft: #d9f1f4;
  --warning: #73510b;
  --warning-soft: #fff2cf;
  --shadow: 0 18px 50px rgba(9, 55, 64, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.6;
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at top right, rgba(0, 124, 145, 0.16), transparent 38rem),
    var(--background);
  color: var(--text);
  margin: 0;
  min-height: 100vh;
}

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

a:hover {
  text-decoration-thickness: 0.14em;
}

a:focus-visible {
  border-radius: 0.3rem;
  outline: 3px solid var(--primary);
  outline-offset: 3px;
}

.site-header,
.site-footer,
main {
  margin-inline: auto;
  max-width: 72rem;
  width: min(100% - 2rem, 72rem);
}

.site-header {
  align-items: center;
  display: flex;
  gap: 1.5rem;
  justify-content: space-between;
  padding-block: 1.25rem;
}

.brand {
  align-items: center;
  color: var(--text);
  display: inline-flex;
  font-size: 1rem;
  font-weight: 800;
  gap: 0.65rem;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  background: var(--primary);
  border-radius: 0.75rem;
  color: #ffffff;
  display: inline-flex;
  font-size: 0.78rem;
  height: 2.15rem;
  justify-content: center;
  letter-spacing: 0.04em;
  width: 2.15rem;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
}

nav a {
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

main {
  padding-block: 3.25rem 4.5rem;
}

.hero {
  max-width: 52rem;
  padding-block: 2.5rem 3rem;
}

.eyebrow {
  color: var(--primary-strong);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  margin: 0 0 0.8rem;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.35rem, 7vw, 4.7rem);
  letter-spacing: -0.045em;
  margin: 0;
  max-width: 15ch;
}

.document h1 {
  font-size: clamp(2.25rem, 6vw, 3.8rem);
  max-width: 20ch;
}

h2 {
  font-size: clamp(1.45rem, 3vw, 2rem);
  letter-spacing: -0.02em;
  margin-block: 0 0.8rem;
}

h3 {
  font-size: 1.08rem;
  margin-block: 0 0.45rem;
}

p,
li {
  color: var(--muted);
}

.lead {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  margin-block: 1.25rem 0;
  max-width: 42rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  background: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 999px;
  color: #ffffff;
  display: inline-flex;
  font-weight: 800;
  padding: 0.7rem 1.15rem;
  text-decoration: none;
}

.button.secondary {
  background: var(--surface-strong);
  border-color: var(--border);
  color: var(--primary-strong);
}

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

.card,
.document-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
  padding: clamp(1.25rem, 4vw, 2rem);
}

.card p:last-child,
.document-section p:last-child {
  margin-bottom: 0;
}

.document {
  max-width: 52rem;
}

.document-header {
  margin-bottom: 2rem;
}

.updated {
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 0.8rem;
}

.document-section + .document-section {
  margin-top: 1rem;
}

.document-section ul,
.document-section ol {
  padding-left: 1.35rem;
}

.notice {
  background: var(--warning-soft);
  border: 1px solid color-mix(in srgb, var(--warning), transparent 65%);
  border-radius: 1rem;
  color: var(--warning);
  margin-top: 1.25rem;
  padding: 1rem 1.15rem;
}

.notice p {
  color: inherit;
  margin: 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  padding-block: 1.5rem 2.5rem;
}

@media (max-width: 42rem) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }

  main {
    padding-top: 1.5rem;
  }

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

@media (prefers-color-scheme: dark) {
  :root {
    --background: #071c22;
    --surface: rgba(13, 43, 51, 0.9);
    --surface-strong: #0d2b33;
    --text: #effbfc;
    --muted: #b2cbd0;
    --border: #2a515a;
    --primary: #4dc8d6;
    --primary-strong: #82dce5;
    --primary-soft: #103d46;
    --warning: #f0ca75;
    --warning-soft: #382b13;
    --shadow: none;
  }

  .button {
    color: #052229;
  }

  .button.secondary {
    color: var(--primary-strong);
  }
}