* {
    margin: 0;
    padding: 0;
}
header{
    background-color: white;
    text-align: center;
    padding-top: 5px;
    font-family:'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-size: 35px;
}

.grille_haut {
    display: flex;
    flex-wrap: wrap;
}

.grille_haut div {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
    grid-gap: 5px;
}

.grille_haut div div {
    background-color: rgb(182, 182, 182);
    border-radius: 5px;
    width: 45px;
    height: 45px;

}

footer{
    display: flex;
    flex-wrap: wrap;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    justify-content: space-evenly;
}

footer div {
    padding-bottom: 5px;
}