<div class="wrapper">
  <div class="grid">
    <div class="sidebar">
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Consectetur rerum, nulla ducimus delenuptates necessitatibus repudiandae hic veritatis, facere atque, corrupti expedita animi. Perferendis, omnis.Sint, ut minima, animi distinctio recusandae cumque! Veritatis ab eius, ad repudiandae eum dolorem sit.</p>
    </div>
    <div class="content">
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Ipsum, fugit maiores optio dolore quos dolorum deserunt atque tempore rerum sunt vel quasi nisi aliquid aliquam inventore molestiae quidem ea eos!Illum eligendi error a libero necessitatibus, sapient maiores similique dolorum ad in distinctio a deleniti blanditiis, voluptate commodi inventore quidem aliquam  
        Excepturi voluptas distinctio in laudantium fugit reicii doloremque illum a praesentium illo ut tempora temporibus, quae beatae maiores cum placeat quisquam pariatur fuga expedita? Error aut ratione adipisci!</p>
    </div>
    <div class="ad">
      This is an ad
    </div>
    <div class="sidebar">
    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Non, libero obcaecati dolore officia suscipit ex, deserunt enim sit eligendi ipsam, quia corporis cumque tempora aliquid debitis perspiciatis, facilis numquam quas!</p></div>
    <div class="content">
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Dignissimos cumque iste necessitatibus quasi, sapiente eos quod eligendi inventore eius nisi culpa error suscipit vel alias nostrum provident assumenda. Inventore, eum.</p>
    </div>
  </div>
</div>
@import url('https://fonts.googleapis.com/css?family=PT+Sans');

.wrapper {
  font-family: 'PT Sans';
  display: flex;
  justify-content: center;
  border: 1px solid #ff4136;
  padding: 30px;
}

.grid {
  display: grid;
  max-width: 800px;
  grid-template-columns: 1fr 2fr;
  grid-template-rows: 1fr 2fr 1fr;
  grid-gap: 20px;
  border: 1px solid black;
  padding: 30px;
  background-color: rgba(0, 0, 0, .05);
}

.ad {
  padding: 20px;
  grid-column-start: 1;
  grid-column-end: 3;
}

.content, .sidebar, .ad {
  font-size: 14px;
  border: 1px dotted #0074d9;
  background-color: rgba(#0074d9, .1);
}

p {
  padding: 0; margin: 0;
}

// Pseudos for demo purposes only

.wrapper,
.grid,
.sidebar,
.content,
.ad {
  position: relative;
}

.wrapper:after,
.grid:after, 
.sidebar:after, 
.content:after,
.ad:after {
  position: absolute;
  text-transform: uppercase;
  left: 0;
  top: 0;
  color: white;
  padding: 5px;
  font-size: 12px;
}

.grid:after {
  content: 'grid';
  background-color: #222;
}

.sidebar:after {
  content: 'sidebar';
  background-color: #0074d9;
}

.ad:after {
  content: 'ad';
  background-color: #0074d9;
}

.content:after {
  content: 'content';
  background-color: #0074d9;
}

.wrapper:after {
  content: 'wrapper';
  background-color: #ff4136;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.