.whatsapp_h {
    z-index: 99;
    bottom: 13%;
    position: fixed;
    width: 46px;
    height: 45px;
    left: 20px;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    box-shadow: 2px 2px 3px #999;
    background-color: #25d366;
}

.whatsapp_h .fa {
    font-size: 39px;
    margin-top: 3px;

}