.whatsapp-button {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 70px;
    right: 15px;
    color: #fff;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    z-index: 1000;
}
.whatsapp-button img {
    width: 100%;
    height: 100%;
    border-radius: 50px;
}