@charset "utf-8";
/* =============================== */
/* BOUTON RETOUR EN HAUT — CHEVRON */
/* =============================== */
/* RESET uniquement du conteneur */
/* =============================== */
/* RESET DU CONTENEUR (pas de reset sur la flèche) */
/* =============================== */

/* RESET */
#backToTopBtn {
    all: unset;
    display: flex;
    box-sizing: border-box;
}

/* STYLE + FADE */
#backToTopBtn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 34px;
    height: 34px;
    background: rgba(0,0,0,0.3);
    border-radius: 6px;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 999999999;

    /* ✔ invisible sans flou */
    opacity: 0;
    pointer-events: none;

    /* ✔ transition propre */
    transition: opacity 0.35s ease, background 0.3s ease, transform 0.3s ease;
}

/* ✔ visible */
#backToTopBtn.show {
    opacity: 1;
    pointer-events: auto;
}

#backToTopBtn:hover {
    background: rgba(0,0,0,0.40);
    transform: scale(1.08);
}

/* CHEVRON */
.arrow-up {
    width: 0;
    height: 0;
    border-left: 7px solid transparent;
    border-right: 7px solid transparent;
    border-bottom: 10px solid rgba(255,255,255,0.9); /* flèche vers le haut */
}

}