Let supply cards move onto another line when space runs out. This completed preview shows the layout before you edit the next exercise.
In style.css, .supply-row controls the section. flex-wrap: wrap allows another row. The flex shorthand on each card sets grow, shrink, and a 9rem starting width; compare the cards at narrow and wide preview widths.
Checkpoint: inspect the card positions in Preview and locate flex-wrap: wrap in the stylesheet.
Change flex-wrap temporarily to nowrap, run Preview, and compare the positions. Restore wrap before moving to the exercise.
Open style.css and change one declaration at a time.
Run Preview after each change; restore the value before the exercise.