:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #64748b;
  --blue: #3767ff;
  --purple: #7953f7;
  --line: #dbe4f3;
  --surface: rgba(255, 255, 255, 0.92);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(145deg, #f8faff 0%, #eef3ff 55%, #f8f5ff 100%);
  line-height: 1.65;
}

a {
  color: var(--blue);
}

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  padding: 24px 0;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: var(--ink);
  font-size: 22px;
  font-weight: 850;
  text-decoration: none;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.hero {
  padding: 72px 0 42px;
}

.eyebrow {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 12px 0 18px;
  font-size: clamp(42px, 8vw, 74px);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.lead {
  max-width: 700px;
  color: var(--muted);
  font-size: 19px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  padding: 28px 0 72px;
}

.card,
.document {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: 0 18px 45px rgba(67, 91, 150, 0.1);
}

.card {
  padding: 24px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

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

.document {
  margin: 32px auto 72px;
  padding: clamp(24px, 5vw, 52px);
}

.document h1 {
  font-size: clamp(34px, 6vw, 52px);
  letter-spacing: -0.04em;
}

.document h2 {
  margin-top: 32px;
  font-size: 21px;
}

.document p,
.document li {
  color: #475569;
}

.updated {
  color: var(--muted);
  font-size: 14px;
}

footer {
  padding: 24px 0 36px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

@media (max-width: 760px) {
  nav {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero {
    padding-top: 42px;
  }
}