     }
    </style>

    <style class="editable">
      .grid {
        display: grid;
        gap: 10px;
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        grid-template-rows: masonry;
      }
    </style>
  </head>

  <body>
    <section class="preview">
      <div class="grid">
        <div class="item" style="block-size: 2em"></div>
        <div
          class="item"
          style="block-size: 3em; grid-column-end: span 2"></div>
        <div class="item" style="block-size: