:root {
  --bg: #f3f5f7;
  --surface: #ffffff;
  --surface-soft: #e7edf2;
  --text: #152734;
  --text-soft: #506271;
  --brand: #0f4c6c;
  --brand-soft: #dce9f1;
  --accent: #c47a2c;
  --border: #c8d3dc;
  --radius: 14px;
  --maxw: 860px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.shell {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 16px 48px;
}

.hero {
  background: linear-gradient(180deg, #10394d 0%, #0f2f40 100%);
  color: #e9f2f7;
  border: 1px solid #1f4a5f;
  border-radius: 18px;
  padding: 20px;
}

.eyebrow {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: #acc4d2;
  margin: 0 0 8px;
}

h1 {
  margin: 0 0 8px;
  font-size: 34px;
  line-height: 1.1;
}

.lead {
  margin: 0;
  color: #cadeea;
}

.grid {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

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

.card h2 {
  margin: 0 0 6px;
  font-size: 18px;
}

.meta {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
}

.actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  border-radius: 10px;
  padding: 10px 12px;
}

.btn-primary {
  background: var(--accent);
  color: #2d1a07;
}

.btn-secondary {
  background: var(--brand-soft);
  color: var(--brand);
  border: 1px solid #a8becd;
}

.doc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-top: 16px;
}

.doc h1 {
  font-size: 28px;
}

.doc h2 {
  margin-top: 22px;
  margin-bottom: 6px;
  font-size: 18px;
}

.doc p,
.doc li {
  color: var(--text-soft);
}

.topnav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.lang-switch {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

.chip {
  display: inline-block;
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--surface-soft);
  color: var(--text);
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.chip-active {
  background: var(--brand-soft);
  color: var(--brand);
  border-color: #9eb5c4;
}

footer {
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-soft);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: #edf2f6;
  border: 1px solid #d7e0e7;
  border-radius: 6px;
  padding: 2px 6px;
}