.items_ok .tn-atom: {
       position: relative;
}

.items_ok .tn-atom:before {
    content: "";
    background: url(https://static.tildacdn.com/tild3463-6134-4236-a636-636136376639/9004773_tick_check_m.svg);
    position: absolute;
    right: 10px;
    top: 10px;
    width: 18px;
    height: 18px;
    z-index: 99;
    background-size: 100%;
}