html, body {
    background-image: url("CFR_1-modified.png");  
}
.encadrer-un-contenu{ border: 2px solid rgb(255, 255, 255);
                     padding: 10px;
                     background-color: rgb(255, 255, 255);
                     right: 80%;
                     position: relative;
                     top: 650px; 
                     left: 1330px;
                     border-radius : 6px;
                     font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    

 }