#contenu {
   
    border: 1px solid #000000;
    color: #000000; /* ecriture contenu */
    margin: 20px auto;
    width: 1300px;
}
header {  
    height: 200px;  /* centre le logo*/
    width: 1250px;
}
 
article { 
    
    padding:20px;
    position:relative;
    width:1250px !important; 
}