<!DOCTYPE html> <!-- https://github.com/servo/servo/issues/9306 --> <style> body { margin: 0; } .green { background: #0F0; height: 40px; width: 400px; top: 40px; left: 50%; margin-left: -300px; position: absolute; padding: 0px 100px; } .red { background: #F00; position: absolute; right: 0; } </style> <div class="green"> <span class="red">x</span> </div>