lours.net/user/themes/le_style_de_lours/css/bricklayer.css

.bricklayer {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: start;
    -webkit-align-items: flex-start;
    -ms-flex-align: start;
    align-items: flex-start;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
}

.bricklayer-column-sizer {
    width: 100%;
    display: none;
}

@media screen and (min-width: 640px) {
    .bricklayer-column-sizer {
        width: 100%;
    }
}

@media screen and (min-width: 980px) {
    .bricklayer-column-sizer {
        width: 50%;
    }
}

/*@media screen and (min-width: 1200px) {*/
    /*.bricklayer-column-sizer {*/
        /*width: 33.33333%;*/
    /*}*/
/*}*/

.bricklayer-column {
    -webkit-box-flex: 1;
    -webkit-flex: 1;
    -ms-flex: 1;
    flex: 1;
    padding-left: 5px;
    padding-right: 5px;
}