s the content of the td)
                       instead of directly using the height property,
                       because sizing on table cells is complicated and out of scope for this. */
}

div {
  font-size: 20px;
  color: transparent;
}

/* Sizing the reference divs using the actual 0 (after which the ch unit is based) in the inline dimensions,
   and using the ch unit in the block dimension,
   to make sure that the ch unit itself works well in the general case.
   If it doesn't, or if writing mode