Before After Z-Index

css - z-index when using ::after under element - Stack Overflow

The Lowdown on :before and :after in CSS

Understanding Pseudo-Element :before and :after - Hongkiat

The Z-index Property: How to Control Stacking in Your Webpages ...

Understanding Pseudo-Element :before and :after - Hongkiat

Multiple Backgrounds and Borders with CSS 2.1 \u2013 Nicolas Gallagher

css3 | 9photoshop.com

z-index | CSS-Tricks

A Whole Bunch of Amazing Stuff Pseudo Elements Can Do | CSS-Tricks

The Z-index Property: How to Control Stacking in Your Webpages ...