:root {
  --teal: #308890;
  --teal-dark: #266c73;
  --mint: #E8F0F0;
  --ink: #1a2628;
  --muted: #5a6e72;
  --rule: #d8e3e4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Avenir Next",
    Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--mint);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

header.site {
  background: var(--teal);
  color: white;
  padding: 28px 20px;
}

header.site .wrap {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

header.site a.brand {
  color: white;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.2px;
}

header.site nav a {
  color: white;
  text-decoration: none;
  margin-left: 18px;
  opacity: 0.92;
  font-size: 0.95rem;
}

header.site nav a:hover { opacity: 1; text-decoration: underline; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 36px 20px 80px;
}

main h1 {
  font-size: 2rem;
  margin: 0 0 8px;
  color: var(--teal-dark);
}

main .updated {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

main h2 {
  margin-top: 36px;
  font-size: 1.25rem;
  color: var(--teal-dark);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 6px;
}

main h3 {
  margin-top: 24px;
  font-size: 1.05rem;
  color: var(--ink);
}

main p, main li { font-size: 1rem; }

main a { color: var(--teal-dark); }

.notice {
  background: #fff8e1;
  border-left: 4px solid #f0b400;
  padding: 12px 16px;
  margin: 24px 0;
  border-radius: 4px;
  font-size: 0.95rem;
}

footer.site {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 24px 20px 36px;
}

.hero {
  text-align: center;
  padding: 24px 0 8px;
}

.hero h1 {
  font-size: 2.5rem;
  margin: 8px 0;
}

.hero p {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 520px;
  margin: 0 auto;
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 32px;
}

.links a {
  background: var(--teal);
  color: white;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
}

.links a:hover { background: var(--teal-dark); }
.links a.ghost { background: white; color: var(--teal-dark); border: 1px solid var(--rule); }