:root {
  color-scheme: light dark;
  --accent: #287a78;
  --accent-strong: #175f5d;
  --background: #f4f6f5;
  --surface: rgba(255, 255, 255, 0.82);
  --text: #17201f;
  --secondary: #5d6967;
  --border: rgba(23, 32, 31, 0.1);
  --shadow: 0 20px 60px rgba(28, 55, 52, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #72cbc7;
    --accent-strong: #9adbd8;
    --background: #0d1211;
    --surface: rgba(29, 37, 36, 0.84);
    --text: #f1f6f5;
    --secondary: #aebbb9;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.3);
  }
}

* {
  box-sizing: border-box;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  line-height: 1.55;
  background: var(--background);
  color: var(--text);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 15% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 34rem),
    var(--background);
}

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

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}

.site-header,
.site-footer,
main {
  width: min(100% - 40px, 780px);
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-block: 28px 18px;
}

.wordmark {
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 700;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 18px;
  font-size: 0.95rem;
}

nav a {
  color: var(--secondary);
  font-weight: 600;
  text-decoration: none;
}

main {
  padding-block: 36px 56px;
}

.hero {
  padding-block: 54px 68px;
}

.eyebrow {
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 660px;
  margin: 12px 0 18px;
  font-size: clamp(2.35rem, 8vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.page-title {
  font-size: clamp(2.2rem, 7vw, 3.7rem);
}

.lede {
  max-width: 630px;
  margin: 0;
  color: var(--secondary);
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.card,
.document {
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.card {
  display: block;
  padding: 28px;
  color: var(--text);
  text-decoration: none;
}

.card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  transform: translateY(-2px);
}

.card h2 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

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

.document {
  padding: clamp(28px, 6vw, 54px);
}

.document h2 {
  margin: 2.4rem 0 0.65rem;
  font-size: 1.25rem;
}

.document h2:first-of-type {
  margin-top: 2rem;
}

.document p,
.document li {
  color: var(--secondary);
}

.document strong {
  color: var(--text);
}

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

.site-footer {
  padding-block: 0 36px;
  color: var(--secondary);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

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

  main {
    padding-top: 18px;
  }

  .hero {
    padding-block: 32px 48px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .card {
    transition: transform 160ms ease, border-color 160ms ease;
  }
}