style.css

#root {
    box-sizing: border-box;
}
.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
h1 { 
    position: relative;
    top: 120px;
    color: white;
    font-size: 30px;
    font-family: 'Press Start 2P', cursive;
    z-index: 3;
}
.piano-layer-1 {
    background-color: red;
    width: 700px;
    height: 300px;
    border-radius: 25% 25% 3rem 2rem / 35% 20% 10% 25%;
    position: relative;
}
.piano-key-1 {
    position: absolute;
    right: 586px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-2 {
    position: absolute;
    right: 544px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-3 {
    position: absolute;
    right: 502px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-4 {
    position: absolute;
    right: 460px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-5 {
    position: absolute;
    right: 418px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-6 {
    position: absolute;
    right: 376px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-7 {
    position: absolute;
    right: 334px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-8 {
    position: absolute;
    right: 292px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-9 {
    position: absolute;
    right: 250px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-10 {
    position: absolute;
    right: 208px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-11 {
    position: absolute;
    right: 166px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-12 {
    position: absolute;
    right: 124px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-13 {
    position: absolute;
    right: 82px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-key-14 {
    position: absolute;
    right: 40px;
    top: 145px;
    width: 40px;
    height: 150px;
    background-color: white;
    border-radius: 0 0 1rem 1rem;
    z-index: 1;
    transition: all .07s ease;
}
.piano-blk-key-1 {
    position: absolute;
    right: 570px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
}
.piano-blk-key-2 {
    position: absolute;
    right: 528px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
}
.piano-blk-key-3 {
    position: absolute;
    right: 486px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
}
.piano-blk-key-4 {
    position: absolute;
    right: 402px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
}
.piano-blk-key-5 {
    position: absolute;
    right: 360px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
}
.piano-blk-key-6 {
    position: absolute;
    right: 276px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
}
.piano-blk-key-7 {
    position: absolute;
    right: 234px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
}
.piano-blk-key-8 {
    position: absolute;
    right: 192px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
}
.piano-blk-key-9 {
    position: absolute;
    right: 108px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
   
}
.piano-blk-key-10 {
    position: absolute;
    right: 66px;
    top: 145px;
    width: 30px;
    height: 90px;
    background-color: black;
    border-radius: 0 0 45% 45%;
    z-index: 2;
    transition: all .07s ease;
}
.playing {
    transform: scale(1.1);
    background-color: grey;
  }