body {
    font-family: 'Poppins', sans-serif;
    background: #f5f5f5;
    color: #333;
    margin: 0;
    padding: 0;
}

header {
    background-color: #2c3e50;
    color: #fff;
}

.audio-player {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #fff;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

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

#playlist li {
    background-color: #f1f1f1;
    margin: 10px 0;
    padding: 10px;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#playlist li.active {
    background-color: #2980b9;
    color: #fff;
}

#playlist li:hover {
    background-color: #ecf0f1;
}

#playlist li a {
    text-decoration: none;
    color: inherit;
}

#playlist li .duration {
    font-size: 0.9rem;
    color: #7f8c8d;
}

.progress {
    width: 100%;
    height: 10px;
    margin-top: 10px;
}

.progress-bar {
    background-color: #2980b9;
}