"viewport" content="width=device-width, initial-scale=1, user-scalable=no">

    <style>
      h1 {
        border-bottom: 1px solid #ddd;
        margin-bottom: 2rem;
        width: 100%;
      }

      h3 {
        width: 100%;
      }

      .example {
        padding: 2rem;
        border: 1px solid #ddd;
        width: 100%;
      }

      .example + h1 {
        margin-top: 5rem;
      }

      .example + h3 {
        margin-top: 3rem;
      }
    </style>
  </head>

  <body>
    <div class="grid-cont