.qr {
    border: 5px solid #111;
    width: 100px;
    height: 100px;
    margin: 55px auto;
    object-fit: cover;
}

.strikethru {
    text-decoration: line-through;
}

.madlib-slot {
    font-style: italic;
    font-weight: bold;
}

.piano .blackkey {
   background-color: #333 !important;
   color: white !important; 
}

.piano .whitekey {
    background-color: white !important;
    color: black !important; 
 }