body
{
	margin: 0;
	padding: 0;
	width:100%;
	height:100%;
}

html{
        background: url(web_back.jpg) no-repeat center center fixed;
        -webkit-background-size: cover;
        -moz-background-size: cover;
        -o-background-size: cover;
        background-size: cover;
}

#logo{
	width: 600px;
	height: 504px;
	position: absolute;
	left: 50%;
	top: 50%;
	margin-left: -300px;
	margin-top: -252px;
	background-image: url(logo.png);
	background-repeat: no-repeat;

	
}