One line to rule them
Level 5 of 9Your goal
Make the box 240 × 80 and write its transition as a single transition shorthand: all properties, 0.3s, ease.
Must use
transitiontarget 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.