scratch-www/src/components/masonrygrid/masonrygrid.scss

@import "../../frameless";
$tile-width: ( 4 * ($column + $gutter) - $gutter);

.masonry {
    column-gap: $gutter;
    column-width: $tile-width;
    -webkit-perspective: 1;
}

// working around Firefox issue that requires column-count, using explicit -moz-column-count
//4 columns
@media only screen and (max-width: $mobile - 1) {

    .masonry {
        -moz-column-count: 1;
    }
}

//6 columns
@media only screen and (min-width: $mobile) and (max-width: $tablet - 1) {
    .masonry {
        -moz-column-count: 1;
    }
}


//8 columns
@media only screen and (min-width: $tablet) and (max-width: $desktop - 1) {
    .masonry {
        -moz-column-count: 2;
    }
}

// 12 columns
@media only screen and (min-width: $desktop) {
    .masonry {
        -moz-column-count: 3;
    }
}