/* ============================================================
   Shared top navigation — three flat items across all pages.
   Token-only; sits on the --color-surface navbar. Loaded by
   index.html (Chat), rag.html (RAG management), create.html.
   ============================================================ */
.lb-topnav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.lb-navlink {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  line-height: 1.4;
  color: var(--color-text-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}
.lb-navlink:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.lb-navlink.active {
  color: var(--color-accent);
  background: var(--color-accent-soft);
  font-weight: var(--weight-semibold);
}
.lb-navlink:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}

@media (max-width: 640px) {
  .lb-navlink { padding: var(--space-1) var(--space-2); font-size: var(--text-xs); }
}