.tete,
.pied {
    position: absolute;
    background-color: var(--couleur-dominante);
    height: 60px;
    width: 100%;
    transition: .4s;
    z-index: 1;
}

.tete {
    display: flex; justify-content: center; align-items: center
}

.tete img {
    height: 40px;
    margin: 10px;
}

.tete .titre-principal {
    margin: 10px 0 2px 0;
    text-align: center;
    font-size: 1.3em;
    text-shadow: none;
}

.tete .sous-titre {
    margin: 2px 0 10px 0;
    text-align: center;
    font-size: .7em;
    text-shadow: none;
}

.tete a {
    color: #fffafa;
    text-decoration: none;
}

.pied {
    bottom: 0;
    overflow: hidden;
}

.pied img {
    height: 24px;
    margin: 18px 10px;
    float: right;
}

.pied .lien-chant img,
.pied .tiret {
    float: left;
    height: 1vw;
    margin: calc((60px - 1vw) / 2) .25vw;
    transition: .3s;
}

.lien-chant img:hover {
    transform: scale(1.8);
}

#menu-btn .ligne-menu {
    display: block;
    background-color: var(--blanc-casse);
    width: 100%;
    height: 4px;
    margin: 6px 0;
    border-radius: 3px;
    transition: .6s;
}
.ligne-menu:first-child{
    margin-top: 2px;
}
.ligne-menu:last-child{
    margin-bottom: 2px;
}

#menu-btn {
    cursor: pointer;
    display: none;
    float: right;
    width: 30px;
    height: 40px;
    padding: 10px 15px;
}
#menu-mobile{
    display: flex;
    justify-content: space-around;
    overflow: hidden;
    position: absolute;
    z-index: 3;
    height: 0;
    width: 100%;
    margin-top: 59px;
    background-color: var(--couleur-dominante);
    transition: .6s;
}
#menu-mobile img{
    height: 32px;
    margin: 14px 5px;
}
@media only screen and (max-width: 700px), (max-height: 500px) {
    .tete{
        justify-content: space-between;
    }
    .tete img{
        height: 35px;
        margin: 13px 10px;
    }
    #menu-btn {
        display: block;
    }

    #menu-btn.ouvert .ligne-menu:first-child {
        width: 40px;
        transform: rotate(45deg) translate(4px, 8px);;
    }
    #menu-btn.ouvert .ligne-menu:nth-child(2) {
        background-color: transparent;
    }
    #menu-btn.ouvert .ligne-menu:last-child {
        width: 40px;
        transform: rotate(-45deg) translate(7px, -10px);
    }
    #menu-btn{
        height: 30px;
        padding: 15px 15px;
    }
}