#bibliotheque  {
    z-index:50;
    background-color:transparent;
    background-repeat:repeat;
    background-position:left top;
    padding-left:15px;
    padding-right:5px;
}

.etagere {
    margin-top:-3px;
    background-color:transparent;
    background-repeat:no-repeat;
    background-position:10px 0px;
    margin-left:-15px;
    margin-right:-5px;
}

.tranche {
    position:relative;
    z-index:100;
    background-color:white;
}

.bulle {
    border: 1px solid black;
    background-color: white;
    color: black;
    position:absolute;
    z-index:150;
    width:300px;
    height:150px;
    overflow: auto;
    margin-top:-150px;
}

.titre_magazine {
    font-size: 20px;
}

.numero_magazine {
    font-size: 16px;
}

.lien_participer {
    color:blue;
    text-decoration: underline;
}