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

h1 {
	font-size: 300%;
 	font-family : Trebuchet;
 	color: #000;
	padding: 0px;
	margin: 20px;
    text-align: center;
}