.meia-cell {
  aspect-ratio: 2/1;
  background-color: #f3f3f3;
  border: 2px solid #d3d3d3;
  cursor: pointer;
  transition: border-color .12s;
  width: 100%;
}

.meia-cell.selected { border-color: #488ddd; outline: 3px solid #488ddd; outline-offset: -3px; }