#container {
    margin: auto;
}

figure {
    display: flex;
    flex-direction: column;
}

figcaption {
    font-size: 1.8rem;
    margin: 10px auto;
    font-weight: bold;
    text-align: center;
}

.container_div_audio {
    display: flex;
    gap: 10px;
    align-items: center;
    margin: 30px auto;
}

@media screen and (max-width: 768px) {
    .container_div_audio {
        flex-direction: column;
    }
}

.track-btn {
    background-color: #333;
    color: white;
    border: none;
    padding: 5px 10px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
}

.track-btn:hover {
    background-color: #000; /* darker blue on hover */
}

.track-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(30, 30, 30, 0.5);
}

.listen {
    margin: 50px auto;
    font-size: 1.8rem;
    font-weight: bold;
    text-align: center;
}