.wa-floating-btn {
    position: fixed !important;
    bottom: 90px !important;
    right: 20px !important;
    width: 65px !important;
    height: 65px !important;
    z-index: 999999 !important;
    text-decoration: none !important;
    display: block !important;
    font-size: 0 !important;
    color: transparent !important;
    
    /* INCOLLA QUI SOTTO IL LINK COMPLETO DEL TUO SITO */
    background-image: url('https://www.hackerhouse.it/shop/images/whatsapp-3d.png') !important;
    
    background-size: contain !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
    background-color: transparent !important; 
    border-radius: 0 !important;
    box-shadow: none !important;
    transition: transform 0.2s ease-in-out !important;
}

.wa-floating-btn:hover {
    transform: scale(1.1) !important;
}