pas2js/demo/webwidget/designdemo/design.css

button[data-widget-class] {
  background-repeat: no-repeat;
  background-position: center;
  width: 36px;
  height: 36px;
}
#toolbar {
  width: 80%;
  background-color: #DDDDDD;
  margin-bottom: 32px;
  padding: 4px 4px 4px 4px;
  margin-left: 30px;
}
#designpage {
  background-color: #A0A0A0;
  width: 80%;
  height: 80vh;
  margin-left: 30px;
  margin-top: 32px;
}

.designerActive {
  position: relative;
  border: 1px dashed #87cefa;
}

.designerToolbar {
  position: absolute;
  top: 0px;
  left: -18px;
  height: 100%;
  display: flex;
  flex-direction: column;
/*  justify-content: space-around;  */
}

.designerDragHandle{
  margin-left: 1px;
}

.designerPlaceholder {
  border: 3px dotted black;
  margin: 1em 1em 1em 1em;
  height: 50px;
}

.source {
  display: flex;
  width: 540px;
  margin: 10px auto;
  font-size: 12px;
}