#sbiricuda {
    border: 1px solid #ccc;
}

.node {
    fill: lightsteelblue;
    stroke: #FFFFFF;
    stroke-width: 3px;
}
.leaf {
    stroke: #fff;
    stroke-width: 1.5px;
}
.hull {
    fill: lightsteelblue;
    fill-opacity: 0.3;
}
.link {
    stroke: #333;
    stroke-opacity: 0.5;
    pointer-events: none;
}