.select2-container .select2-selection--single {
    height: 40px !important;          /* altura del contenedor */
}

.select2-container .select2-selection__rendered {
    line-height: 40px !important;      /* centra el texto */
}

.select2-container .select2-selection__arrow {
    height: 40px !important;
}

/* Altura del dropdown */
.select2-container .select2-results__options {
    max-height: 500px !important;  /* MÁS alto que el default (~200px) */
}