<!DOCTYPE html> <link rel="help" href="https://drafts.csswg.org/css-align-3/#synthesize-baseline"> <link rel="match" href="../reference/ref-filled-green-100px-square.xht"> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div style="display: flex; align-items: baseline; writing-mode: vertical-lr; background: red;"> <div style="height: 50px; width: 100px; background: green;"></div> <div style="height: 50px; width: 100px; background: green; line-height: 0;"> <span style="width: 100px; height: 10px; display: inline-block;"></span> </div> </div>