.control-section .dual-list-wrapper {
    width: 80%;
    margin: 0 auto 10px;
    display: flex;
}
.dual-list-groupa{
    width: 50%;
}

.dual-list-groupb {
    width: 50%;
}
.dual-list-groupb .e-listbox-wrapper,
.dual-list-groupb h6 {
    width: 87%;
    margin-left: 15px;
}
@media screen and (max-width: 590px) {
    .control-section .dual-list-wrapper {
        width: 100%;
    }
    .dual-list-groupa {
        width: 56%;
    }
    .dual-list-groupb {
        width: 44%;
    }
}
@media screen and (max-width: 400px) {
    .dual-list-groupa {
        width: 59%;
    }
    .dual-list-groupb {
        width: 41%;
    }
}
#listbox-control {
    margin: auto;
}
@media screen and (max-width: 590px) {
    #listbox-control {
        width: 100%;
    }
}