.contenu{
	background-image: url(http://i.giphy.com/awGYEZoCjwnfi.gif);
	width: 100%;
	height: 100%;
	background-position: center;
	background-position: absolute;
	background-repeat: no-repeat;

}
#bravo
{text-align: center;font-size: 55px;}

#titre{
	margin-top:30px; 
	font-size:70px; 
	text-align:center;
	}