body {
    font-family: sans-serif;
    text-align: center;
    padding: 30px;
    background: #f0f0f0;
}

h1 {
    font-size: 2em;
    color: #333;
}

#track {
    font-size: 1.5em;
    margin: 10px 0 30px;
    color: #0077cc;
}

audio {
    width: 80%;
    max-width: 400px;
}