.node rect {
    fill: #fff;
    stroke: steelblue;
    stroke-width: 3px;
    cursor: pointer
}

.node text {
    font: 12px sans-serif;
    cursor: pointer;
    user-select: none;
}

.link {
    fill: none;
    stroke: #ccc;
    stroke-width: 2px;
}

.highlight rect {
    fill: yellow;
    stroke: orange;
}

.highlight text {
    font-weight: bold;
}

.bold-text {
    font-style: normal;
    font-weight: bold;
}


.italic-text {
    font-weight: normal;
    font-style: italic;
}

.roman-text {
    font-weight: normal;
    font-style: normal;
    font-family: Times, Roman, serif;
}