#zero-opacity {
    text-opacity: 0%;
}

#quarter-opacity {
    text-opacity: 25%;
}

#half-opacity {
    text-opacity: 50%;
}

#three-quarter-opacity {
    text-opacity: 75%;
}

#full-opacity {
    text-opacity: 100%;
}

Label {
    height: 1fr;
    width: 100%;
    text-align: center;
    text-style: bold;
}