.col-1 {width: 10%;}
.col-2 {width: 15%;}
.col-3 {width: 25%;}
.col-4 {width: 36.5%;}
.col-5 {width: 41.66%;}
.col-6 {width: 48%;}
.col-7 {width: 58.33%;}
.col-8 {width: 66.66%;}
.col-9 {width: 75%;}
.col-10 {width: 80%;}
.col-11 {width: 90%;}
.col-12 {width: 100%;}
.col-13 {width: 40%;}
.col-14 {width: 15%;}
[class*="col-"] {
    float: left;
    padding: 0px;
    border: 0px solid red;
}

.row::after {
    content: "";
    clear: both;
    display: table;
}		

@media screen and (min-width: 1500px) {
.col-2 {width: 11.6%;}
.col-4 {width: 25%;}
.col-6 {width: 63%;}
.item-galleria {width:16.55%;}
}