text {
    font-family: sans-serif;
    font-size: 10px;
}

div.tooltip-urgap-node {
    position: absolute;
    text-align: center;
    padding: .5rem;
    background: #CCC;
    color: #313639;
    border: 1px solid #313639;
    border-radius: 8px;
    pointer-events: none;
    font-size: 0.75rem;
    z-index: 13;
}

.svg-container {
    display: inline-block;
    position: relative;
    width: 100%;
    padding-bottom: 100%;
    vertical-align: middle;
    overflow: hidden;
}