body {
 margin-left: 5px;
 margin-top: 5px;
 margin-right: 5px;
 margin-bottom: 5px;
}
#centrado {
 position: absolute;
 top: 50%; 
 left: 50%; 
 height: 654px;   /* 600 */
 width: 1052px;   /* 998 */

 margin-top: -300px; 
 margin-left: -499px; 
 background-color: ; 
}
#lateral{
	background-color: ;
	width: 200px;
	height: 500px;
	position: absolute;
	top: 100px;
	left: 0px;
	z-index: 3;
}