Makes Polaroid products page grid responsive via flexbox

polaroid-product-grid.css

body.all-products #main-content .product-box {
    -webkit-box-flex: 0;
        -ms-flex: 0 0 auto;
            flex: 0 0 auto;
    margin: 0 5px 15px!important;
}

.category-feature {
    width: 100%;
    min-width: 445px;
    max-width: 445px;
}

.category-feature.product-box.first {height: 316px!important;}

body.all-products #main-content {
    margin: 135px auto 35px;
    padding: 10px 0% 0;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
        -ms-flex-flow: row wrap;
            flex-flow: row wrap;
    overflow: hidden;
}