body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 20px;
}
header {
    background-color: #fff;
    padding: 10px;
    border-bottom: 1px solid #ccc;
    text-align: center;
}
h1 {
    color: #333;
    font-size: 28px;
    text-align: center;
    margin-top: 40px;
}
audio {
    display: block;
    margin: 20px auto;
}