/* 虚拟钢琴样式 */
.virtual-piano {
    position: relative;
    height: 200px;
    margin: 20px auto;
    width: fit-content;
}

.piano-key {
    cursor: pointer;
    user-select: none;
    transition: all 0.1s;
    box-sizing: border-box;
    position: absolute;
}

.piano-key.white {
    width: 40px;
    height: 180px;
    background: white;
    border: 2px solid #333;
    border-radius: 0 0 5px 5px;
    z-index: 1;
}

.piano-key.black {
    width: 28px;
    height: 110px;
    background: #333;
    border: 2px solid #000;
    border-radius: 0 0 3px 3px;
    z-index: 2;
}

.piano-key:hover {
    filter: brightness(0.9);
}

.piano-key.active {
    transform: translateY(3px);
    filter: brightness(0.8);
}

.key-label {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    font-weight: bold;
}

.piano-key.white .key-label {
    color: #333;
}

.piano-key.black .key-label {
    color: white;
    font-size: 10px;
}