/* 
--date-time-grid-columns 
--date-time-cell-width
--date-time-grid-row-gap

задаются сверху
*/

.DateTimeGrid {
  display: grid;
  grid-template-columns: repeat(var(--date-time-grid-columns), var(--date-time-cell-width));
  grid-row-gap: var(--date-time-grid-row-gap);
  -webkit-box-pack: start;
      -ms-flex-pack: start;
          justify-content: start;
}