#playlist-player {
    padding: 15px;
    max-width: 600px;
    margin: 0 auto;
}

#playlist-header {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 8px;
    color: red;
    text-align: center;
}

#playlist-subheader {
    font-size: 18px;
    margin-bottom: 12px;
    text-align: center;
}

#playlist-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

#playlist-list li {
    padding: 10px;
    border-bottom: 1px solid #ccc;
    font-size: 18px;
}

#playlist-list li.marked {
    background: yellow;
}

#ab-switch {
    margin: 10px 0;
    padding: 10px 16px;
    font-size: 16px;
}