body{
	width: 100%;
	height: 100%;
	}
	
.el_fondo { border:1px solid red;
	position:absolute;
	background-color:white; 
	padding:15px; 
	z-index:15;
	
	left: 50%; 
	top: 50%; 
	margin-top: -270px;   
	margin-left: -400px; padding:0px;	
	}

.el_fondo p {
	margin:15px; 
	}
	
.el_fondo2 { 
	position: absolute;
	left: 50%; 
	top: 50%; 
	margin-top: -270px;   
	margin-left: -400px; 	
	}
	
		
.el_oscurito { 
	position: absolute; 
	background-color:black; 
	display:block;
	width:100%;	
	height:100%;
	z-index:15;
	}