.gv-whatsapp-button{
    display:block;
    width:100%;
    text-align:center;
    background:#25D366;
    color:#fff !important;
    padding:14px 20px;
    margin-top:12px;
    border-radius:6px;
    font-weight:600;
    text-decoration:none;
    transition:0.2s;
}

.gv-whatsapp-button:hover{
    opacity:0.9;
    color:#fff !important;
}