.axis text {
    font-size: 12px;
    fill: #333;
}

rect.bar { fill: #99c2eb; }
rect.bar { fill: #64abeb; }
rect.bar:hover { fill: #73aadc ; }
rect.bar:hover { fill: #3b93db; }

.axis {}
.x .domain { stroke: #131e24; stroke-width:.75; }
.tick text {
  fill: #a6a6a6;
  font-size: 14px;
}

.chart-buttons {
  display: flex;
  justify-content: center;
  margin-top: 30px;
}
.chart-button {
  background-color: #eff1f3;
  color: #333333;
  border: 1px solid #fff;
  cursor: pointer;
  display: inline;
  padding: 7px 15px 8px;
} 
.chart-button:hover {
  background-color: #e6e6e6;
}
.chart-buttons .checked {
  background-color: #bdccd4;
  color: #000; 
  cursor: default;
}