.command-logger {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0px;
  left: 0px;
  background: #1e1e1e;
  color: #eee;
  overflow: auto;
  z-index: 99;
  padding: 20px;
}

.command-logger .category-header {
  text-align: center;
  padding-bottom: 10px;
}

.command-logger .tree-map {
  margin: auto;
  position: relative;
  width: 960px;
  height: 700px;
  background-color: #efefef;
}

.command-logger .node text {
  font-size: 10px;
  fill: #111;
}

.command-logger {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0px;
  left: 0px;
  background: #1e1e1e;
  color: #eee;
  overflow: auto;
  z-index: 99;
  padding: 20px;
}

.command-logger .category-header {
  text-align: center;
  padding-bottom: 10px;
}

.command-logger .tree-map {
  margin: auto;
  position: relative;
  width: 960px;
  height: 700px;
  background-color: #efefef;
  border: 1px solid #999;
}

.command-logger .node text {
  font-size: 10px;
  fill: #111;
}

Add border to tree map
Add border to tree map
