html, body {
  font-family: Arial, Helvetica, sans-serif;
  height: 100%;
  margin: 0;
  width: 100%;
}

svg {
  font: 8px sans-serif;
}

rect {
  stroke: #fff;
  stroke-width: 0.5px;
}

#hierarchy1 {
  border-right: 1px solid gray;
  float: left;
  height: 100%;
  width: calc(50% - 3px);
}

#hierarchy2 {
  display: inline-block;
  height: 100%;
  width: 50%;
}

#current-node {
  box-sizing: border-box;
  left: 0;
  padding: 16px;
  pointer-events: none;
  position: fixed;
  top: 0;
  width: 50%;
}