#treeview {
  height: 400px;
}

.options {
  padding: 20px;
  position: absolute;
  bottom: 0;
  right: 0;
  width: 260px;
  top: 0;
  background-color: #f5f5f5;
}

.caption {
  font-size: 18px;
  font-weight: 500;
}

.option {
  margin-top: 10px;
}

.option > .dx-selectbox {
  display: inline-block;
  vertical-align: middle;
  max-width: 350px;
  width: 100%;
  margin-top: 5px;
}