Common Layout Bugs and How to Fix Them

The seven layout bugs almost everyone meets, from a page that scrolls sideways to a z-index that won't work, each with its symptom, its cause and the fix that removes the cause instead of hiding it.

Updated

Cheat sheet: Common Layout Bugs and How to Fix Them
Category
CSS
Level
Journeyman
Tags
CSS, Margin collapsing, Overflow, Stacking context, Sticky positioning, Viewport, web-development