.d-p-d3 .d3-chart {
    position: relative;
    display: inline-block;
    width: 100%;
    /*padding-bottom: 100%;*/
    vertical-align: middle;
    overflow: hidden;
}

.d-p-d3 .d3-chart svg {
    position: absolute;
    display: inline-block;
    top: 0;
    left: 0;
}