:root {
  --navy: #0b1f3a;
  --blue: #0f3460;
  --green: #00c896;
  --green-dark: #008f70;
  --green-50: #e7f8f2;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #16243a;
  --muted: #64748b;
  --border: #dfe7f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

.topbar {
  background: var(--navy);
  color: #fff;
}

.topbar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  color: #fff;
  font-weight: 800;
  font-size: 20px;
  text-decoration: none;
}

.brand span {
  color: var(--green);
}

.langs a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 14px;
  margin-left: 12px;
}

.langs a[aria-current='true'] {
  color: #fff;
  font-weight: 700;
}

.wrap {
  max-width: 820px;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}

.hero {
  background: var(--navy);
  color: #fff;
  padding: 32px 0 56px;
}

.hero h1 {
  font-size: clamp(28px, 6vw, 40px);
  line-height: 1.15;
  margin: 0 0 12px;
}

.hero p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 18px;
  margin: 0;
  max-width: 560px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: -32px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
}

.card h3 {
  margin: 0 0 6px;
  color: var(--navy);
}

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

.doc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin: 24px 0;
}

.doc h1 {
  color: var(--navy);
  font-size: 28px;
  margin: 0 0 4px;
}

.doc h2 {
  color: var(--blue);
  font-size: 18px;
  margin: 28px 0 8px;
}

.doc .updated {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 16px;
}

.notice {
  background: var(--green-50);
  border-radius: 12px;
  padding: 16px;
}

footer {
  color: var(--muted);
  font-size: 14px;
  padding: 24px 0 48px;
}

footer a {
  margin-right: 16px;
}