body,
html {
    margin: 0;
    height: 100%;
    background-color: #666;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    background-color: #fff;
    /* cursor: default !important; */
}

audio {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 10;
    filter: invert(1);
    opacity: 0;
}

audio:hover {
    opacity: 1;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    background-color: rgba(255, 255, 255, .5);
    padding: 25px;
    border-radius: 50%;
    border: 0;
    cursor: pointer;
    display: none;
    opacity: 0;
    filter: drop-shadow(0px 0px 40px #000);
    transform: translate(-50%, -50%);
}
.play-button:hover {
    position: absolute;
    top: 50%;
    left: 50%;
    background-color: rgba(255,255,255, .9);
    padding: 25px;
    border-radius: 50%;
    border: 0;
    display: flex;
    cursor: pointer;
}
.play-button.active {
    display: flex;
    opacity: 1;
}