| <!DOCTYPE html> |
| <!-- |
| | If the element has "position: absolute", the containing block is established |
| | by the padding edge of the nearest ancestor with a "position" of "absolute". |
| | https://www.w3.org/TR/CSS21/visudet.html#containing-block-details |
| --> |
| <html> |
| <head> |
| <style> |
| body { |
| margin: 0px; |
| } |
| .absolutely-positioned { |
| position: absolute; |
| } |
| .level-1 { |
| background-color: #b3e5fc; |
| padding: 10px; |
| } |
| .level-2 { |
| background-color: #40c4ff; |
| padding: 20px; |
| } |
| .level-3 { |
| background-color: #00b0ff; |
| padding: 40px; |
| } |
| .level-4 { |
| background-color: #0091ea; |
| height: 120px; |
| width: 120px; |
| } |
| .topleftquadrant { |
| left: 0px; |
| top: 0px; |
| width: 25%; |
| height: 25%; |
| } |
| .bottomrightquadrant { |
| right: 0%; |
| bottom: 0%; |
| width: 25%; |
| height: 25%; |
| } |
| .bottomrightextended { |
| right: -25%; |
| bottom: -25%; |
| width: 50%; |
| height: 50%; |
| } |
| .absolutely-positioned.level-4 { |
| background-color: #01579b; |
| } |
| .absolutely-positioned.level-5 { |
| background-color: #0277bd; |
| } |
| .zindex { |
| z-index: -1; |
| } |
| </style> |
| </head> |
| <body> |
| <div class="absolutely-positioned level-1"> |
| <div class="absolutely-positioned level-2"> |
| <div class="level-3"> |
| <div class="level-4"></div> |
| <div class="absolutely-positioned topleftquadrant level-4"> |
| <div class="absolutely-positioned bottomrightextended level-5"></div> |
| </div> |
| <div class="absolutely-positioned bottomrightquadrant level-4"> |
| <div class="absolutely-positioned bottomrightextended level-5 zindex"></div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </body> |
| </html> |
