body {font-family:Arial,sans-serif;background:#f4f4f9;color:#333;margin:0;padding:0;}
header {background:#004080;color:#fff;text-align:center;padding:1em;}
nav a {margin:0 1em;color:#fff;text-decoration:none;}
section {max-width:800px;margin:2em auto;padding:0 1em;}
.audio-item {margin-bottom:1.5em;}
.audio-item h3 {margin:0.5em 0 0.2em;}
footer {background:#004080;color:#fff;text-align:center;padding:1em;margin-top:3em;}