body {
  background: radial-gradient(1200px 800px at 10% -10%, rgba(111,179,145,0.12), transparent),
              radial-gradient(700px 700px at 90% 0%, rgba(211,154,71,0.12), transparent),
              var(--bg);
}

.doc-hero {
  padding: 56px 0 24px;
}

.doc-hero h1 {
  margin: 0 0 12px;
}

.doc-grid {
  display: grid;
  grid-template-columns: minmax(220px, 260px) 1fr;
  gap: 24px;
}

.doc-nav {
  position: sticky;
  top: 110px;
  align-self: start;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 16px;
}

.doc-nav h4 {
  margin: 0 0 10px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.doc-nav a {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  color: var(--text);
}

.doc-section {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 18px;
}

.doc-section h2 {
  margin: 0 0 12px;
  font-size: 22px;
}

.doc-section p {
  margin: 0 0 12px;
  color: var(--muted);
}

.doc-section ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.doc-section code {
  color: #d7d2c6;
}

@media (max-width: 900px) {
  .doc-grid {
    grid-template-columns: 1fr;
  }
  .doc-nav {
    position: relative;
    top: 0;
  }
}