.whatsapp-float {
    position: fixed;
    right: 20px;      /* Same as scroll-top */
    bottom: 80px;     /* Place above the arrow */
    width: 50px;      /* Same size */
    height: 50px;     /* Same size */
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 18px rgba(0,0,0,.25);
    z-index: 9992;    /* One above the arrow */
    transition: all .3s ease;
}

.whatsapp-float:hover {
    transform: scale(1.08);
}

.whatsapp-float svg {
    width: 26px;
    height: 26px;
}

@media (max-width:768px){
    .whatsapp-float svg{
        width:30px;
        height:30px;
    }
}