The ratio survives resizing
Level 3 of 9Your goal
Give the full-width box a 16 : 9 ratio so its height follows its width: 420 × 236 on the 420px stage and 700 × 394 on the 700px stage.
Must use
aspect-ratioChecked at 2 stage widths (420px, 700px) — every stage below has to match.
stage 420px
stage 700px
target content boxtarget outer edge (green = matched, red = not yet)
Feedback updates as you type, and your CSS is saved in this browser. Exact target numbers are in the Target panel.