#3d-graph {
    height: 80vh;
  }
  
  .node {
    fill: #fff;
    stroke: #000;
    stroke-width: 1px;
    cursor: pointer;
  }
  
  .link {
    stroke: #ccc;
    stroke-width: 1px;
    opacity: 0.6;
  }
  
  .link--highlighted {
    stroke: steelblue;
    opacity: 1;
  }
  
  .link--selected {
    stroke: steelblue;
    opacity: 1;
  }
  
  .node--highlighted {
    stroke: steelblue;
    stroke-width: 2px;
  }
  
  .node--selected {
    stroke: steelblue;
    stroke-width: 2px;
  }