.gm-style-iw-d {
    font-family: Arial, Helvetica, sans-serif;
}

.gm-style-iw-d button {
    background: linear-gradient(180deg, #01a8af 53%, #3b6cb6 100%);
    border-radius: 10px;
    border: #ffffff solid 2px;
    /* Double shadow for more visibility */
    /*text-shadow: 0px 0px 15px rgb(0, 0, 0), 0px 0px 10px rgb(0, 0, 0);*/
    cursor: pointer;
    color: #ffffff;
    padding: 2px;
}