div.css

path.link {
    fill: none;
    stroke: #666;
    stroke-width: 1.5px;
}

path.link:hover {stroke: red;stroke-width: 4px}

path.link.licensing {
    stroke: green;
}

path.link.resolved {
    stroke-dasharray: 0,2 1;
}

circle {
    fill: #ccc;
    stroke: #333;
    stroke-width: 1.5px;
}

text {
    font: 10px sans-serif;
    pointer-events: none;
}

text.shadow {
    stroke: #fff;
    stroke-width: 3px;
    stroke-opacity: .8;
}