.treemap text {
    pointer-events: none;
  }
  
  .treemap .grandparent text {
    font-weight: bold;
  }
  
  .treemap rect {
    fill: none;
    stroke: #fff;
  }
  
  .treemap rect.parent,
  .treemap .grandparent rect {
    stroke-width: 2px;
  }
  
  .treemap rect.parent {
      pointer-events: none;
  }
  
  .treemap .grandparent rect {
    fill: #eee;
  }
  
  .treemap .grandparent:hover rect {
    fill: #aaa;
  }
  
  .treemap .children rect.parent,
  .treemap .grandparent rect {
    cursor: pointer;
  }
  
  .treemap .children rect.parent {
    fill: #bbb;
    fill-opacity: .5;
  }
  
  .treemap .children:hover rect.child {
    fill: #bbb;
  }