.d-whatsapp-btn {
    position: fixed;
    bottom: 0px;
    right: 10px;
    background: #4AC959;
    color: #FFF;
    z-index: 9999;
    padding: 10px 15px;
    border-top-left-radius: 4px;
    border-top-right-radius: 4px;
    font-size: 18px;
    font-weight: 600;
}

.d-whatsapp-btn:hover {
    opacity: 0.8;
}


@media only screen and (max-width: 600px) {
    .d-whatsapp-btn span{
        display: none;
    }

    .d-whatsapp-btn {
        padding: 10px 15px;
        border-radius: 50px;
        font-size: 20px;
        bottom: 10px;
    }

    .d-whatsapp-btn:hover {
        opacity: 1;
    }
}