p { 
font-weight : bold;
color: Sienna;
margin-left: 20;
margin-right: 20;
width:"640px";
max-width: 640px;
}

h1 {
align: center;
font-weight : bold;
position: center;
color: Sienna;
}

body {
background-color: gainsboro;
width: "640px";
text-align: center;
position: center;
align: center;
max-width: 640px;
margin-left: auto;
  margin-right: auto;
  width: 640;
}

.bloc-fixe { text-align: center;
margin-left: 20;
margin-right: 20;
width: 640px;
align: center;
font-weight : bold;
position: center;
color: Sienna;
max-width: 640px;
}

#entete {
align: center;
border-color : gray;
border-radius :"20px";
text-align : center; 
width :"640px";
}

#qrcode {
border-color: gray;
 border-radius :"10px";
text-align : center;
}

#guitareDeJP {
position: left;
}

#trompetteImage {
position: right;
}