:root {
  color-scheme: light dark;
  --background: #f5faf9;
  --surface: #ffffff;
  --text: #10282c;
  --muted: #51666a;
  --accent: #006c72;
  --accent-strong: #004f54;
  --border: #cbdcda;
  --focus: #bd5300;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0d181a;
    --surface: #142326;
    --text: #edf8f7;
    --muted: #b9cdca;
    --accent: #77dce1;
    --accent-strong: #a7f1f3;
    --border: #355054;
    --focus: #ffb56b;
  }
}

* {
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 100%;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.15em;
}

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

a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 10;
  padding: 0.65rem 0.85rem;
  background: var(--surface);
  border: 2px solid var(--focus);
  color: var(--text);
}

.skip-link:focus {
  top: 1rem;
}

header,
main,
footer {
  width: min(100% - 2rem, 48rem);
  margin-inline: auto;
}

header {
  padding-block: 2.5rem 1rem;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav a {
  display: inline-block;
  min-height: 44px;
  padding-block: 0.55rem;
}

main {
  padding-block: 1rem 3rem;
}

.document,
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: clamp(1.15rem, 3vw, 2.5rem);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
  gap: 1rem;
}

h1,
h2 {
  line-height: 1.2;
}

h1 {
  margin-top: 0;
  font-size: clamp(2rem, 7vw, 3rem);
}

h2 {
  margin-top: 2.25rem;
  font-size: clamp(1.3rem, 4vw, 1.65rem);
}

.card h2 {
  margin-top: 0;
}

p,
li {
  max-width: 72ch;
}

.updated,
.note {
  color: var(--muted);
}

.email {
  overflow-wrap: anywhere;
}

footer {
  border-top: 1px solid var(--border);
  padding-block: 1.5rem 3rem;
  color: var(--muted);
}

@media print {
  nav,
  .skip-link {
    display: none;
  }

  body,
  .document,
  .card {
    background: #ffffff;
    color: #000000;
    border-color: #888888;
  }

  a {
    color: #000000;
  }
}