.chart_label_item:hover {
  fill: rgba(0,0,0,.3);
}

.chart_label_item {
    -moz-transition: all 0.3s;
    -o-transition: all 0.3s;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
}

.d3-tip {
  line-height: 1.3;
  padding: 12px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 0, 0, 0.2);
  color: #000;
  border-radius: 2px;
}

/* 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);
  content: "\25BC";
  position: absolute;
  text-align: center;
}

/* Style northward tooltips differently */
.d3-tip.n:after {
  margin: -1px 0 0 0;
  top: 100%;
  left: 0;
}