<!-- BEGIN COPY / PASTE -->
    <div class="grid-container">
      <div class="centered-div">Centered Content</div>
    </div>

    <style>
      .grid-container {
        display: grid;
        height: 100vh; /* Full viewport height */
        place-items: center; /* Centers the items both horizontally and vertically */
      }
      .centered-div {
        width: 200px;
        height: 100px;
        background-color: lightblue;
      }
    </style>
    <!-- END COPY / PASTE -->