* {margin: auto; padding:0; }

body { 
	background: url("background.png") repeat center top fixed;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

logo {
	text-align:center; }
contato {
	background-position: center;
	}