:root {
  color-scheme: light dark;
  --background: #f4f7f6;
  --surface: #ffffff;
  --text: #17211f;
  --muted: #5d6a67;
  --accent: #147d70;
  --accent-dark: #0d5c53;
  --border: #d7e0de;
  --notice: #eaf6f3;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #101715;
    --surface: #18211f;
    --text: #ecf5f2;
    --muted: #a9b8b4;
    --accent: #68cbbb;
    --accent-dark: #8cdbcf;
    --border: #34423f;
    --notice: #18312c;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

a {
  color: var(--accent-dark);
}

.container {
  width: min(760px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  padding: 88px 0 64px;
  background: linear-gradient(145deg, #0f6f64, #174f61);
  color: white;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.8;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2.2rem, 7vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h2 {
  margin-top: 2.2rem;
  font-size: 1.35rem;
  line-height: 1.3;
}

.lead {
  max-width: 650px;
  margin: 0;
  font-size: 1.2rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  padding-block: 48px;
}

.card {
  display: block;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  box-shadow: 0 8px 28px rgb(14 51 45 / 8%);
  transition: transform 150ms ease, border-color 150ms ease;
}

.card:hover,
.card:focus-visible {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card span {
  font-size: 1.5rem;
}

.card h2 {
  margin: 12px 0 6px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.breadcrumb {
  padding-top: 28px;
}

.breadcrumb a {
  font-weight: 650;
  text-decoration: none;
}

.document {
  padding-block: 48px;
}

.document h1 {
  font-size: clamp(2rem, 6vw, 3.4rem);
}

.document p,
.document li {
  max-width: 70ch;
}

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

.notice {
  margin-block: 32px;
  padding: 20px 22px;
  border: 1px solid var(--border);
  border-left: 5px solid var(--accent);
  border-radius: 10px;
  background: var(--notice);
}

.notice p {
  margin: 4px 0 0;
}

.site-footer {
  padding-block: 28px 48px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-reduced-motion: reduce) {
  .card {
    transition: none;
  }
}