.control-group {
    position: absolute;
    margin-left: auto;
    margin-right: auto;
    left: 0;
    right: 0;
    height: 200px;
    bottom: 110px;
    text-align: center;
}

@media only screen and (min-device-width: 600px) {
    .show-large {
        display: block;
    }
    .show-mobile {
        display: none;
    }
}

@media only screen and (max-device-width: 600px) {
    .show-large {
        display: none;
    }
    .show-mobile {
        display: block;
    }
}