.N23B862C7-div {
  overflow: hidden;
}
.N23B862C7-div:empty {
  border: 2px dashed rgba(0,0,0,0.5);
  padding: 30px;
  line-height: 1em;
  font-family: sans-serif;
  font-size: 1.5em;
  color: rgba(0,0,0,0.5);
  text-align: center;
}
.N23B862C7-div:empty::after {
  content: "drop contents";
}