#container  { margin-right: 500px; margin-left: 65px; right: 5%; left: 5%; width: 90%; max-width: 800px }

* html #container { 
	margin-left: -420px;
	margin-right: auto;
	left: 50%;
	right: auto;
	width: 800px;
}

*+html #container { 
	margin-left: -420px;
	margin-right: auto;
	left: 50%;
	right: auto;
	width: 800px;
}