<html xmlns="http://www.w3.org/1999/xhtml"> <head> <style type="text/css"> html, body { margin: 0; padding: 0; } html { background-color: white; } body { background-color: red; margin: 20px 0; } div { background-color: green; margin: 10px 0; height: 100px; } </style> </head> <body> <div></div> </body> </html>
