body {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh; /* 使頁面充滿整個視窗 */
    margin: 0;
}
.audio-player {
    width: 300px;
    padding: 20px;
    background-color: #f5f5f5;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.select-wrapper {
    width: 100%;
    margin-top: 10px;
}

select {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    box-sizing: border-box;
}

.player-wrapper {
    width: 100%;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px; /* 與上方 .audio-player 有所區隔 */
}

audio {
    width: 100%;
}

.audio-player {
    width: 300px;
    padding: 20px;
    background-color: #f5f5f5;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}