.pianoK{
    position: relative;
    display: flex;
    align-items: stretch;
    list-style-type: none;
    height: 160px;
    width: 800px;
}
.w,.b{
    border-style: solid;
    border-color: black;
    border-width: 0.2px;
    border-radius: 0 0 1.5px 1.5px;
    margin: 0 0.2px;
    top: 0px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    flex-direction:column;
    font-size: 100%;
    box-shadow: 1px 1px 2px rgb(87, 87, 87);
}
.w{
    background-color: white;
    width: 100%;
    height: 100%;
    color: black;
    box-shadow: 1px 2.8px 4px rgb(87, 87, 87);
}
.b{
    background-color: black;
    position: absolute;
    right: -9px;
    width: 50%;
    height: 70%;
    z-index: 10;
    color: white;
    box-shadow: inset 2.1px -1px 2px rgb(199, 198, 198), 0.4px 0.9px 2.1px rgb(87, 87, 87);
}
li{
    position: relative;
    display: inline-flex;
    flex-grow: 1;
    justify-content: center;
    cursor: pointer;
}