content
header
content
grid-column and
grid-row.grid-column is a shorthand for
grid-column-start and grid-column-end who takes two parameters, the first
define where the element should start and the second where he should end on the column line.grid-row.grid-column: 2 / -1 and grid-row: 1 / 2.div.header then we try to place our element after the div.menu
so on the column line with grid-column we will indicate 2 for
for the second column and -1 who define the last column of our grid this is helpful
when you don't know exactly how many columns you have in your grid, it's the same process for
grid-row.