<!DOCTYPE html> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>bug 1059167</title> <style type="text/css"> body { width: 200px; height: 200px; border: 1px solid black; } .item { width: 100px; margin-left: 80px; padding: 1rem; background: red; box-sizing: border-box; } p { background: blue; } </style> </head> <body> <div class="item"><p>Content</p></div> </body> </html>