/* drag-and-drop */

.dragCurtain {
  display: none;
  pointer-events: none;
  justify-content: center;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1;
}
.dragCurtain div {
  color: #11f;
  background: white;
  border: 2px solid #11f;
  padding: 2rem;
  font-size: 1.5rem;
  font-weight: bold;
}
.dragging .dragCurtain {
  display: flex;
}