/* Area positioning */
  grid-area: header; /* You can use a named grid area from the container */

  grid-area: 2 / 1 / 4 / 2; /* Or you can use positioning. This is equivalent to... */
  grid-row-start: 2;
  grid-column-start: 1;
  grid-row-end: 4;
  grid-column-end: 2;