<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <style type="text/css">
      #wrapper {
        display: block;
        max-width: 680px;
        margin: 0 auto;
      }

      #pages {
        display: flex;
      }

      #log-output {
        margin-top: 50px;
        border-top: 1px solid #ccc;
      }
      #log-output p {
        color: #666;
        margin: 2px 0;
      }
      #log-output p::before {
        content: '> ';
      }
    </style>
  </head