#keymaster {
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    background: rgba(0, 0, 0, 0.8);
}
#keymaster div.keymaster_message {
    width: 20em;
    margin: 1em auto;
    padding: 1em;
    border-radius: 1em;
    background: #fc0;
    color: black;
    overflow: auto;
}
#keymaster p {
    font-weight: bold;
}
#keymaster div.keymaster_buttons {
    text-align: right;
}
#keymaster button {
    padding: 0.5em 1em;
}