| <!DOCTYPE html> | |
| <style> | |
| html { | |
| margin: 0; | |
| font-size: 20px; | |
| } | |
| body { | |
| margin: 1em; | |
| border: 1px solid blue; | |
| } | |
| body > div { | |
| margin-bottom: 2em; | |
| border: 1px solid black; | |
| } | |
| </style> | |
| <body> | |
| <div style="writing-mode: vertical-lr; height: 1em"> | |
| <div><span>a</span></div> | |
| </div> | |
| <div style="writing-mode: vertical-lr; height: 1em"> | |
| <div><span>a</span></div> | |
| </div> | |
| </body> |