#gauche{
    margin-top:2%;
    float:left;
    width:45%;
    
    padding:10px;
    text-align:center;
    
}

#droite{
    margin-top:2%;
    float:right;
    width:45%;
    border: 1px solid black;
    padding:10px;
}

#haut{
    height:30%;
    border: 1px solid black;
    text-align:center;
}

#bas{
    height:30%;
    border: 1px solid black;
    text-align:center;
}

#entete{
    width:100%;
    top:0;
    text-align:center;
    font-weight:bold;
    font-size:large;
    
}