<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>CSS Reference: Ruby with text-combine-upright annotation</title> <link rel="author" title="Xidorn Quan" href="mailto:csswg@upsuper.org"> <link rel="stylesheet" href="/fonts/ahem.css"> <style> .test { font: 52px Ahem; writing-mode: vertical-rl; } </style> </head> <body> <p>Test passes if the two rectangles are vertically middle aligned.</p> <div class="test"> <ruby><rb>XXXX</rb><rt><span style="writing-mode: horizontal-tb">X</span></rt></ruby> </div> </body> </html>