text {
    font-family: sans-serif;
    font-size: 14px;
}

rect {
    stroke-width: 1px;
}

rect.SCC {
    stroke-width: 2px;
    fill-opacity: 0;
    fill: #FFF;
}

rect.stack {
    fill: #FFF;
}

svg {
    display: block;
    margin: 0 auto;
}