html,body{		
height:100%;
width:100%;
/*	overflow:hidden;*/
/*margin: 0px;*/
}

.circular--square {
border-radius: 55%;
}

.portada {
background: url(../img/background.jpg) no-repeat fixed center;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
height: 85%;
width: 100% ;    
/*width: 800px; otra clase
margin: auto; posicion de manera centrada */
}

.portada2 {
background: url(../img/background2.png) no-repeat fixed center;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
height: 100%;
width: 100% ;    


/*width: 800px; otra clase
margin: auto; posicion de manera centrada */
}


footer{
/*		border: 1px solid red;    */
width: 100%;
height: 40px;
}

.transparencia{	
opacity: 0.8;
}