.colonna-storia-sing {
    display: flex;
    flex-direction: row;
    position: relative;
}

.colonna-storia-sing::before {
    position: absolute;
    content: '';
    height: 100%;
    width: 3px;
    background-color: #16905D;
    left: 50%;
    transform: translate(-50%, 0);
    top: 0;
    bottom: 0;
}


.anno.titolo-dots {
    position: absolute;
    left: 50%;
    transform: translate(-50%, 0);
    background: #fff;
    padding: 10px;
}

.colonna-storia-sing > div {
    flex-grow: 1;
    flex-basis: 50%;
    order: 3;
}

.colonna-storia-sing:nth-child(2n+1) > div.singola-colonna {
    order: 2;
}


.colonna-storia-sing div.singola-colonna {

}

.colonna-storia-sing div.singola-colonna .anno-spacer {
    padding-top: 60px;
}


.colonna-storia-sing div.singola-colonna .contenuto {
    position: relative;
    padding: 45px;
}

.colonna-storia-sing div.singola-colonna .contenuto::after {
    position: absolute;
    content: '';
    height: 20px;
    width: 20px;
    background-color: #fff;
    border: 3px solid #16905D;
    border-radius: 100%;
    left: 0;
    transform: translate(-50%, -50%);
    top: 50%;


}

.colonna-storia-sing:nth-child(2n+1) > div.singola-colonna .contenuto::after {
    right: 0;
    transform: translate(50%, -50%);
    left: unset;
}

.colonna-storia-sing div.singola-colonna .contenuto .descrizione {
    margin-bottom: 40px;
}


@media screen and (max-width: 768px) {
    body .colonna-storia-sing > div {
        order: 1;
    }

    /*riga verticale*/
    body .colonna-storia-sing::before {
        left: 0;
        transform: unset;
    }

    body .colonna-storia-sing {
        display: block;

    }

    body .colonna-storia-sing:nth-child(2n+1) > div.singola-colonna .contenuto::after {
        left: 0;
        transform: translate(-50%, -50%);
        right: unset;
    }
}