.gdc-install-btn {
    position: fixed;
    bottom: 20px;
    font-size: 1em;
    left: 20px;
    text-decoration: none;
}

.gdc-install-btn div {
    text-align: center;
    color: #444;
    font-weight: bold;
}

.gdc-hidden {
    display: none;
}