.pimcel_icon_import {
    background: url(/bundles/pimcelconnector/img/import.png) center center no-repeat !important;
}

.pimcore_main_nav_icon_celum {
    background-image: url(/bundles/pimcelconnector/img/celum.png);
    background-size: contain;
    top: 12px;
    left: 17px;
    width: 24px;
    height: 24px;
}