.whatsapp-float{
    position:fixed;
    right:15px;
    bottom:90px;
    width:55px;
    height:55px;
    background:#25D366;
    color:#fff;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:30px;
    text-decoration:none;
    box-shadow:0 4px 10px rgba(0,0,0,.25);
    z-index:9999;
    transition:.3s;
}

.whatsapp-float:hover{
    transform:scale(1.1);
    background:#f2f2f2;
}