async def style():
    """Return styles."""
    return """
      <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css">
      <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css" integrity="sha384-oS3vJWv+0UjzBfQzYUhtDYW+Pj2yciDJxpsK1OYPAYjqT085Qq/1cq5FLXAZQ7Ay" crossorigin="anonymous">
      <script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/js/materialize.min.js"></script>
      <style>
        .yaml {
            font-family: monospace, monospace;
            font-size: 1em;
            border-style: solid;
            border-width: thin;
            margin: 0;
        }
        a {
          color: #ffab40;
        }
      </style>
    """