.tdfa30403-button
{
    text-align: center;
    font-size: 24px;
    border-radius: 8px;
    padding: 1.5rem;
    cursor: pointer;
    border: solid 1px #0078d4;
    background-color: white;
    color: #0078d4;
}
.tdfa30403-button.on {
    background-color: #0078d4;
    color: white;
}
.tdfa30403-button.locked {
    border: solid 1px #eee;
    background-color: #eee;
    color: #888;
}