/* assets/css/whatsapp_button.css */
#whatsapp-button {
    position: fixed;
    bottom: 100px;
    right: 20px;
    z-index: 1000;
}

#whatsapp-button a {
    display: block;
    width: 50px;
    height: 50px;
    background: url(..//images/icon/whatsapp.png) no-repeat;
    background-size: cover;
}