body{
	margin: 0px;
	overflow-x: hidden;
}

body:before{
	content: ' ';
	background: url(recursos/banner.jpg);
	background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center center;
    display: block;
    position: fixed;
	left: 0;
    top: 0;
	width: 100%;
    height: 100%;
    opacity: 0.1;
    z-index: -1;
}