svg {
    cursor: crosshair;
    display: block;
    margin: auto;
    background-color: #FFFFFF;
}

.edge {
    stroke: #888;
    stroke-width: 2px;
    stroke-linecap: round;
    stroke-linejoin: round;
    cursor: default;
}

.edge:hover,
.dragLine {
    stroke: #333;
    stroke-width: 3px;
}

.vertex {
    cursor: pointer;
}

.vertex:hover {
    stroke: #333;
    opacity: 0.8;
}

.dragLine.hidden {
    stroke-width: 0;
}