:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5d6678;
  --line: #dfe4ec;
  --surface: #ffffff;
  --soft: #f4f7fb;
  --accent: #2458d6;
  --accent-strong: #163d9c;
  --success: #087f5b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--soft);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

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

.shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
}

.nav {
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--ink);
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 20px;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.hero {
  padding: 84px 0 56px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.18;
  letter-spacing: -0.025em;
}

h1 {
  max-width: 780px;
  margin: 14px 0 20px;
  font-size: clamp(2.35rem, 6vw, 4.4rem);
}

h2 {
  margin-top: 0;
  font-size: clamp(1.45rem, 3vw, 2rem);
}

h3 {
  margin-bottom: 8px;
}

.lede {
  max-width: 740px;
  color: var(--muted);
  font-size: 1.15rem;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 24px;
  padding: 8px 12px;
  border: 1px solid #bce3d6;
  border-radius: 999px;
  background: #edf9f5;
  color: var(--success);
  font-size: 0.9rem;
  font-weight: 700;
}

.status::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 64px;
}

.card,
.paper {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(20, 35, 68, 0.06);
}

.card {
  padding: 26px;
}

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

.paper {
  margin: 48px auto 72px;
  padding: clamp(28px, 5vw, 56px);
}

.paper h2 {
  margin-top: 36px;
}

.paper h2:first-of-type {
  margin-top: 24px;
}

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

.notice {
  margin: 28px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  background: #eef3ff;
}

footer {
  padding: 28px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .nav-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 16px 0;
  }

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

  .hero {
    padding-top: 56px;
  }
}