#conteneur{

	width:800px;

	margin:auto;

	padding:40px;

	
background: rgba(255, 255, 255, 0.8)
	}
body {
  
  background: url("ImageFond.jpg") no-repeat center fixed; 

  background-size:cover;

 }
 .bleu{color:blue;

	font-size:20px;

	text-align:middle;

	}
.blanc{color:white;
font-size:20px;
text-align:middle;
    }
video{
background-color:black;
opacity:1;
}
#qcm{display:none}

#p2{display:none}

#p3{display:none}