f;
        font-size: 16px;
        padding: 4px;
        border-radius: 3px;
        color: #eee;
        background: rgba(0,0,0,0.65);
        visibility: hidden; /* by default */
        }

        .force-graph-container .clickable {
        cursor: pointer;
        }

        .force-graph-container .grabbable {
        cursor: move;
        cursor: grab;
        cursor: -moz-grab;
        cursor: -webkit-grab;
        }

        .force-graph-container .grabbable:active {
        cursor: grabbing;
      