.dlk-radio input[type="radio"],
.dlk-radio input[type="checkbox"] 
{
    margin-left:-99999px;
    display:none;
}
.dlk-radio input[type="radio"] + .fa ,
.dlk-radio input[type="checkbox"] + .fa {
     opacity:0.15
}
.dlk-radio input[type="radio"]:checked + .fa,
.dlk-radio input[type="checkbox"]:checked + .fa{
    opacity:1
}