#package {
    height: 100%;
    display: grid;
    grid-template-rows : 5% 10% 80% 5%;
    grid-template-columns: 5% 90% 5%;
}

#back{
    grid-column : 1;
    grid-row : 1;
}

#titre{
    grid-column : 1 / span 3;
    grid-row : 2;
}

#conteneur{
    grid-column : 2;
    grid-row : 3;

    display: grid;
    grid-template-columns: 5% 40% 10% 40% 5%;
    grid-template-rows : 5% 10% 80% 5%;
}


#g1{
    grid-column : 2;
    grid-row : 2;
    box-sizing: border-box;
}

#g2{
    grid-column : 4;
    grid-row : 2;
    box-sizing: border-box;
}