/* Navegação institucional compartilhada, independente do conteúdo das páginas. */
.top-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 24px;
  padding: 16px 20px;
  background-color: var(--bg-main);
  border-bottom: 1px solid rgba(255,255,255,0.18);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
}
.top-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 6px 4px;
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border-bottom: 3px solid transparent;
}
.top-nav a:hover {
  color: var(--color-primary);
}
.top-nav a[aria-current] {
  color: var(--color-primary);
  border-bottom-color: currentColor;
}
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid currentColor;
  outline-offset: 4px;
}
@media (max-width: 480px) {
  .top-nav { gap: 4px 12px; padding: 12px; }
}

input:focus-visible, textarea:focus-visible {
  outline-color: var(--color-primary);
}