.placeholder {
    background-color: magenta;
}

.playing-card {
    /*64mm x 89mm*/
    width: 6.4em;
    height: 8.9em;
    background-color: #f5f1e4;
    color: #111;
}

.hand-reference {
    position: fixed;
    right: 0;
    padding: 1em;
    top: calc(50% - 8em);
    background-color: #f5f1e4;
    color: #111;
    border-radius: 1em 0 0 1em;
    z-index: 99999;
}
.hand-reference-button {
    position: fixed;
    right: 0;
    top: calc(50% - 8em);
    z-index: 9999;
}

.hidden {
    display: none;
}