/* Fondo especial para opciones de nivel 1 en Select2 */
.select2-container--default .select2-results__option--nivel1 {
  background: #e6f0ff !important;
  font-weight: bold;
  color: #1a237e;
}
.select2-container--default .select2-results__option--nivel1[aria-disabled=true] {
  opacity: 1;
  color: #607d8b;
}