This is an old design remade using CSS grid. The problem is the borders of the box. Borders don't collapse into one another so they'd be twice the size set in the middle but not on the edges.

The trick used was to set left and top borders for the whole grid container then only set right and bottom borders for the grid items. The second to last box had the bottom border removed border: none;.

The text was aligned using absolute positioning. Though it might have been better to set it within the grid, perhaps using grid-areas.

The font used is Jura, available both at fontlibrary.org and google fonts.