.banner_principal {
    width: 100%;
}

.proximamente {
    margin: 0;
}

/* s - Mobile Devices <= 600px */
@media only screen and (max-width: 600px){
    .galeria .row .col {
        clear: right;
        margin-bottom: 1em;
    }
}

/* Tablet Devices > 600px */
@media only screen and (min-width: 601px) and (max-width: 991px){
    .galeria .row .col:nth-child(2n) {
        clear: right;
        margin-bottom: 2em;
    }
}

/* Desktop Devices > 992px */
@media only screen and (min-width: 992px) and (max-width: 1199px){
    .galeria .row .col:nth-child(3n) {
        clear: right;
        margin-bottom: 3em;
    }
}

/* Large Desktop Devices > 1200px */
@media only screen and (min-width: 1200px){
    .galeria .row .col:nth-child(4n) {
        clear: right;
        margin-bottom: 4em;
    }
}