.demo {
  border: 2px dashed #ccc;
  margin-bottom: 1rem;
  min-width: 320px;
}
.demo:not(.no-resize) {
  overflow: auto;
  padding: 2rem 1rem;
  position: relative;
  resize: horizontal;

  &:after {
    color: #666;
    font-size: 0.825rem;
    line-height: 0;
    position: absolute;
    bottom: 0.75rem;
    content: "Resize me!";
    right: 0.85rem;
  }
}