.whatsapp-float{
    position:fixed;
    width: 100px;
    height:100px;
    bottom:40px;
    right:40px;
    background-color:#25d366;
    color:#FFF;
    border-radius:50px;
    text-align: center;
    font-size:60px;
    box-shadow: 4px 2px 3px #2568e4;
    z-index:100;
}

.whatsapp-float:hover{
    background-color:#95929e;
    color:#FFF;
    box-shadow: 2px 2px 3px #666;
    text-decoration:none;
}