| <!DOCTYPE html> |
| <!-- |
| | Within each stacking context, the following layers are painted |
| | in back-to-front order: |
| | - the background and borders of the element forming the stacking context. |
| | - the child stacking contexts with negative stack levels (most negative |
| | first). |
| | |
| | https://www.w3.org/TR/CSS21/visuren.html#z-index |
| --> |
| <html> |
| <head> |
| <style> |
| .outer { |
| border: 5px solid #00b0ff; |
| background-color: #0091ea; |
| height: 100px; |
| position: absolute; |
| width: 100px; |
| z-index: 0; |
| } |
| .inner { |
| border: 5px solid #00e676; |
| background-color: #00c853; |
| height: 100px; |
| left: 50px; |
| position: absolute; |
| top: 50px; |
| width: 100px; |
| z-index: -1; |
| } |
| </style> |
| </head> |
| <body> |
| <div class="outer"> |
| <div class="inner"></div> |
| </div> |
| </body> |
| </html> |
