body{
	background:url(../img/bg.jpg);
}

	
.principal{
	position:relative;
	width:600px;
	height:auto;
	text-align:left;
	font-family:Arial, Helvetica, sans-serif;
	font-size:13px;
	color: #393939;
}
.lateral{
	position:absolute;
	top:0px;
	left:0px;
}
.temasDiv{
	position:relative;
	width:230px;
	height:auto;
	background-color:rgba(255,255,255,0.8);
	padding:8px;
	
}
.explicacion{
	padding:10px;
	position:absolute;
	left:260px;
	top:10px;
	
	width:300px;
	min-height:400px;
	height:auto;
	background-color:rgba(255,255,255,0.8);
	border-bottom:1px solid rgba(000,111,210,0.1);
	border-right:1px solid rgba(000,111,210,0.1);

	color:#333;
}