.card-certificazione-after:after{
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    -webkit-transform: translateX(-50%);
    width: calc(100% - calc(var(--bs-gutter-x) * 1));
    height: calc(100% - 150px);
    background-color: #F3F3F3;
    border-radius: 5px;
}