.logo{
	top:0;
	left:0;
	position:absolute;
	width:590px;
	height:199px;
	background:url("../img/logo_alessio.png") no-repeat left top;
	background-size:590px 199px;
	margin:0;
	opacity:0;
	z-index:1;
}

@media only screen and (max-width: 767px) {
	.logo{
		width:320px;
		height:152px;
		background:url("../img/logo_mobile_alessio.png") no-repeat left top;
		background-size:320px 152px;
		margin:0;
		opacity:0;
	}
}