Hello, please assess my solution for https://developer.mozilla.org/en-US/docs/Learn/CSS/Building_blocks/Selectors/Box_Model_Tasks
1: https://codepen.io/gojanpaolo/pen/gOPxWYb
2: https://codepen.io/gojanpaolo/pen/ExPvmYp
3: https://codepen.io/gojanpaolo/pen/KKVvmKq
Thanks!