body{
    background-color: aqua;
}
.box{
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

h1{
    text-transform: uppercase;
    font-size: 90px;
    text-align: center;
}

p{
    text-align: center;
    font-size: 30px;
    font-weight: bold;
}

.leftCorner{
    border-radius: 0px 0px 0px 100px;
}

.rightCorner{
    border-radius: 0px 0px 100px 0px;
}

.black p{
    color: white;
}

.piano{
    display: flex;
}

.key{
    height: calc(var(--width) * 4);
    width: var(--width);
}

.black{
    --width: 60px;
    background-color: black;
    margin-left: calc(var(--width) / -2);
    margin-right: calc(var(--width) / -2);
    z-index: 2;
}

.white{
    --width: 100px;
    border: 1px solid #333;
    background-color: white;
}

.white.active {
    background-color: #cccccc;
}

.black.active {
    background-color: gray;
}