.whatsapp {
    width: 60px;
    height: 60px;
    bottom: 40px;
    right: 40px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    z-index: 100;

}

.whatsapp-icon {
    margin-top: 13px;
}

.fab {
    margin: 15px;
}



@media only screen and (max-width: 600px) {
    .whatsapp {
        position: fixed;
    }

    .fab .fa-whatsapp {
        margin-top: 15px
    }
}