ol {
    list-style-type: upper-roman;
}

.piano-wrapper {
    margin: 10px auto;
}

.github-mark {
    height: 1em;
}

.deaf-to-all-but-the-song > img{
    display: block;
    margin: auto auto;
}

.deaf-to-all-but-the-song > .mystia1 {
    position: absolute;
    z-index: 1;
}

.deaf-to-all-but-the-song > .mystia2 {
    position: absolute;
    z-index: 2;
    opacity: 0;
}

.deaf-to-all-but-the-song:hover > .mystia2 {
    opacity: 1;
}

.deaf-to-all-but-the-song > .mystia3 {
    position: relative;
    z-index: 3;
    opacity: 0;
}

.deaf-to-all-but-the-song:active > .mystia3 {
    opacity: 1;
}