input.slb-checkbox[type="checkbox"]:not(:checked) + label:before,
input.slb-checkbox[type="checkbox"]:checked + label:before {
    top: 0px !important;
    width: 23px !important;
    height: 23px !important;
    border: 1px solid #bbb !important;
    background: #fff !important;
    transform: translateY(0) !important;
}

input.slb-checkbox[type="checkbox"]:not(:checked) + label:after,
input.slb-checkbox[type="checkbox"]:checked + label:after {
    transform: translateY(0) !important;
}