<!-- BEGIN COPY / PASTE -->
    <div class="grid-container">
      <div class="grid-item">Item 1</div>
      <div class="grid-item">Item 2</div>
      <div class="grid-item">Item 3</div>
    </div>

    <style>
      .grid-container {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 2cqw; /* Use container query width for spacing */
        width: 80%; /* Example container width */
        height: 50vh; /* Example container height */
      }

      .grid-item {
        background-color: #f0f0f0;
        padding: 1cqh; /* Use container query height for padding */
        border: 1px solid #ccc;
      }
    </style>
    <!-- END COPY / PASTE -->