<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>CSS Reftest Reference</title> <link rel="author" title="Kyle Zentner" href="mailto:zentner.kyle@gmail.com"> <style> body { margin: 0; } #a { width: 100px; height: 100px; background: green; margin: 50px; } </style> </head> <body> <div id="a"></div> </body> </html>