.div_generale
{
	position:fixed;
	height:100px;
	left:50%;
	top:0;
	transform: translate(-50%, 0);
	border:0px solid red;
	width:100%;
	z-index:100;
	background-color:white;
}

.div_logo{
	position:absolute;
	left:50%;
	top:0;
	transform: translate(-50%, 0);
}