/* D3 Hover Tip Style */
.d3-tip {
    line-height: 1.5;
    /* font-weight: bold; */
    padding: 12px;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    border-radius: 2px;
    pointer-events: none;
    /* font-family: 'Open Sans', sans-serif; */
    font-family: 'Roboto', sans-serif;
    font-size: 14px;
  }
  
  /* Creates a small triangle extender for the tooltip */
  .d3-tip:after {
    box-sizing: border-box;
    display: inline;
    font-size: 10px;
    width: 100%;
    line-height: 1;
    color: rgba(0, 0, 0, 0.8);
    position: absolute;
    pointer-events: none;
  }
  
  /* Northward tooltips */
  .d3-tip.n:after {
    /* content: "\25BC"; */
    margin: -1px 0 0 0;
    top: 100%;
    left: 0;
    text-align: center;
  }
  
  /* Eastward tooltips */
  .d3-tip.e:after {
    /* content: "\25C0"; */
    margin: -4px 0 0 0;
    top: 50%;
    left: -8px;
  }
  
  /* Southward tooltips */
  .d3-tip.s:after {
    /* content: "\25B2"; */
    margin: 0 0 1px 0;
    top: -8px;
    left: 0;
    text-align: center;
  }
  
  /* Westward tooltips */
  .d3-tip.w:after {
    /* content: "\25B6"; */
    margin: -4px 0 0 -1px;
    top: 50%;
    left: 100%;
  }