main.css

* {
  box-sizing: border-box;
}

#ChartArea {
  background-color: #ddd;
  width: 690px;
  height: 300px;
  margin: 0 auto;
}
#ChartArea svg {
  clear: both;
}

.arrow {
  display: block;
  height: 100%;
  float: left;
  width: 20px;
  border: 1px solid red;
  text-align: center;
  line-height: 300px;
}
.arrow.right {
  float: right;
}

.bar {
  display: inline-block;
  width: 60px;
  height: 150px; /* Gets overriden by D3-assigned height below */
  margin-right: 5px;
  /*background-color: #face3d;*/
  fill: #face3d;
}

.special {
  stroke: green;
}

.axis path,
.axis line {
  fill: none;
  stroke: black;
  shape-rendering: crispEdges;
}
.axis text {
  font-family: sans-serif;
  font-size: 11px;
}