<!DOCTYPE html> <html> <head> <style> .slr { writing-mode: sideways-lr; } </style> </head> <body> <div style="height:0px;width:0px;overflow:visible"> <div style="height:100px;width:120px;background:rgba(0,255,0,0.8);display:inline-block;margin-top:calc(100vh - 316px);"></div> </div> <div style="height:0px;width:0px;overflow:visible"> <div style="height:100px;width:150px;background:rgba(255,0,0,0.8);display:inline-block;margin-top:calc(100vh - 216px);"></div> </div> <div class="slr" style="background:silver; height: calc(100vh - 16px);"> <div style="height:100px;">This text should appear BELOW the red and green blocks.</div> </div> </body> </html>