/*codice css specifico per chrome e safari */  
@media screen and (-webkit-min-device-pixel-ratio:0) {  
#contenuto{ margin-top: 110px;
margin-bottom: 57%px;
margin-left: 0px;
 }  
}   
 

#libri1 {
	position:absolute;
	left: 150px;
	bottom: 20px;

}

#contenuto{
margin: 0 auto;
border: 0px solid black;
position: relative;
}

#lettera{
color:#000;
opacity:0.25;
}