body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: sans-serif;
    background-color: #f0f2f5;
}

.player-container {
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    background-color: #e0e0e0;
    width: 250px;
}

.controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

#play-pause-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: none;
    background-color: #6c757d;
    color: #fff;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background-color 0.3s;
}

#play-pause-btn:hover {
    background-color: #5a6268;
}

#volume-slider {
    width: 150px;
    -webkit-appearance: none;
    background: #bbb;
    height: 5px;
    border-radius: 5px;
}

#volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 15px;
    width: 15px;
    border-radius: 50%;
    background: #6c757d;
    cursor: pointer;
}