der"></div>

  <div class="px-4 pt-5 my-5 text-center border-bottom">
    <h1 class="display-4 fw-bold">Centered screenshot</h1>
    <div class="col-lg-6 mx-auto">
      <p class="lead mb-4">Quickly design and customize responsive mobile-first sites with Bootstrap, the world’s most popular front-end open source toolkit, featuring Sass variables and mixins, responsive grid system, extensive prebuilt components, and powerful JavaScript plugins.</p>
      <div class="d-grid gap-2 d-sm-flex justify-content-sm