d-4 themed-grid-col">.col-6 .col-md-4</div>
    <div class="col-6 col-md-4 themed-grid-col">.col-6 .col-md-4</div>
    <div class="col-6 col-md-4 themed-grid-col">.col-6 .col-md-4</div>
  </div>
  <div class="row mb-3">
    <div class="col-6 themed-grid-col">.col-6</div>
    <div class="col-6 themed-grid-col">.col-6</div>
  </div>

  <hr class="my-4">

  <h2 class="mt-4">Mixed: mobile, tablet, and desktop</h2>
  <div class="row mb-3">
    <div class="col-sm-6 col-lg-8 themed-grid-col">.col-sm-6 .col-lg-8</d