.whatsapp-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 999;
    background-color: #25D366;
    color: #fff;
    text-decoration: none;
    font-family: Arial, sans-serif;
    font-size: 16px;
    padding: 10px 20px;
    border-radius: 5px;
}

.whatsapp-button img {
    width: 30px;
    height: 30px;
    vertical-align: middle;
    margin-right: 10px;
    border-radius: 50%;
}