.whatsapp {
    position: fixed;
    width: 75px;
    height: 75px;
    bottom: 175px;
    right: 11px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    z-index: 100;
    padding-top: 16px;
}

.whatsapp:after {
    position: fixed;
    transition: .25s ease;
    opacity: 0;
    border-radius: 50%;
}

.whatsapp .icon-whatsapp{
    transition: .2s;
}

@media (max-width: 1199px) {
    .whatsapp {
        width: 52px;
        height: 52px;
        margin: 5px;
        padding-top: 11px;
    }
}

@media (max-width: 991px) {
    .whatsapp {
        bottom: 120px;
        left: 1px !important;
    }
    .icon-whatsapp {
        font-size: 30px !important;
    }
}

@media (hover: hover) {
    .whatsapp:hover .icon-whatsapp {
        color: #fff;
    }

    .whatsapp:hover .icon-whatsapp:after {
        background-color: #fff;
    }

    .whatsapp:hover:after {
        top: -5%;
        left: -5%;

        opacity: 1;
    }

    .whatsapp,
    .whatsapp:hover,
    .whatsapp:focus {
        text-decoration: none;
    }

    .whatsapp:hover .icon-whatsapp {
        margin-top: -10px;
    }

    .whatsapp:hover .icon-whatsapp:after {
        height: 20px;
    }
}