.node {
  border: solid 1px white;
  font: 10px sans-serif;
  line-height: 12px;
  overflow: hidden;
  position: absolute;
  text-indent: 2px;
  padding: 0px;  /* form div giving top 1px */
  box-sizing: content-box;  /* otherwise inheriting border-box */
}

.treemap-container {
  position: relative;
  margin: auto;
}