The fastest way to debug CSS layout issues:

1. Add `outline: 1px solid red` to the element
2. Add `* { outline: 1px solid rgba(255,0,0,0.2) }` to see ALL boxes
3. Open DevTools → Elements → check computed styles

90% of layout bugs are:
- Unexpected padding/margin
- Missing display:flex/grid
- An overflow:hidden eating content
- A z-index stacking issue

Don't guess — make the boxes visible.

#webdev #css #frontend #debugging