.canvas-widget-root-container {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: stretch;
}

.canvas-widget-control-panel-container {
  width: 20%;
  padding: 5px;
}

.canvas-widget-control-panel-heading {
  background-color: 
}

.canvas-widget-canvas-container {
  width: 80%;
}