angular/devtools/src/app/demo-app/zippy.component.scss

:host {
  user-select: none;
}

header {
  max-width: 120px;
  border: 1px solid #ccc;
  padding-left: 10px;
  padding-right: 10px;
  cursor: pointer;
}

div {
  max-width: 120px;
  border-left: 1px solid #ccc;
  border-right: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
  padding: 10px;
}