.node rect {
    cursor: move;
    fill-opacity: .9;
    shape-rendering: crispEdges;
}

.node text {
    pointer-events: none;
    text-shadow: 0 1px 0 #fff;
    fill: white;
}

.link {
    fill: none;
    stroke: #000;
    stroke-opacity: .3;
}

.link:hover {
    stroke-opacity: 1;
}