ul {
  display: flex;
  /* Try this too! */
  /* flex-direction: column; */
  gap: 1rem;
  list-style: none;
  padding: 0;
}

li {
  border: 2px solid black;
  cursor: grab;
  padding: 1rem;
}

li:active {
  cursor: grabbing;
}

.over {
  border-style: dashed;
  opacity: 0.5;
}