title: HTML5 / CSS: Is there a benefit in using multiple wrapper-divs within section-elements?
body: <p>Years ago I have learned to made a website by putting everything below the body-tag into a div with a class "wrapper". 
  These makes sense (without doubt) because that way one can align the whole content vertically and horizontally. </p>
  
  <p>Yesterday I have seen this <a href="https://youtu.be/kXHoNdomHAs" rel="nofollow noreferrer">video-tutorial</a></p>
  
  <p>At 07:15 he tells that the technique I have described above shouldn't be used any longer. Instead one should use multiple section-tags and <strong>within</strong> that sections a div of class "wrapper". </p>
  
  <p>So that the section-tags are full-screen and the content can be aligned with the wrapper-divs.</p>
  
  <p>I've made this demo to tinker with such a structure:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>$color1: rgba(173, 216, 230, 1.0);
  html,
  body {
    height: 100%;
  }
  
  body {
    background-color: #bbb;
    margin: 0 1%;
  }
  
  .wrap {
    width: 100%;
    max-width: 800px;
    margin: 5vh auto;
    background-color: white;
    text-align: center;
  }
  
  .content .wrap p {
    padding: 20px 5%;
  }
  
  .footer .wrap {
    background-color: #999;
    color: white;
    font-weight: 900;
    letter-spacing: 1.2px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;link href="https://cdnjs.cloudflare.com/ajax/libs/foundation/6.3.0/css/foundation.min.css" rel="stylesheet" /&gt;
  &lt;section class="header"&gt;
    &lt;div class="wrap"&gt;
      &lt;div class="callout secondary"&gt;
        &lt;h1&gt;This is a Top-Headline.&lt;/h1&gt;
        &lt;p&gt;This is a Sub-Header.&lt;/p&gt;
      &lt;/div&gt;
    &lt;/div&gt;
  &lt;/section&gt;
  
  &lt;section class="content"&gt;
    &lt;div class="wrap"&gt;
      &lt;p&gt;Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium
        quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium.&lt;/p&gt;
      &lt;p&gt;Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus. Aenean leo ligula, porttitor eu, consequat vitae, eleifend ac, enim. Aliquam lorem ante, dapibus in, viverra quis, feugiat a, tellus. Phasellus viverra
        nulla ut metus varius laoreet. Quisque rutrum. Aenean imperdiet. Etiam ultricies nisi vel augue. Curabitur ullamcorper ultricies nisi. Nam eget dui. Etiam rhoncus. Maecenas tempus, tellus eget condimentum rhoncus, sem quam semper libero, sit amet
        adipiscing sem neque sed ipsum. Nam quam nunc, blandit vel, luctus pulvinar, hendrerit id, lorem. Maecenas nec odio et ante tincidunt tempus. Donec vitae sapien ut libero venenatis faucibus. Nullam quis ante. Etiam sit amet orci eget eros faucibus
        tincidunt. Duis leo. Sed fringilla mauris sit amet nibh. Donec sodales sagittis magna.&lt;/p&gt;
    &lt;/div&gt;
  &lt;/section&gt;
  
  &lt;section class="footer"&gt;
    &lt;div class="wrap"&gt;
      &lt;p&gt;&amp;copy; 2017 by xyz&lt;/p&gt;
    &lt;/div&gt;
  &lt;/section&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>I mean: It works. Of course ...</p>
  
  <p>But I don't get the idea what's the concrete benefit. Currently I think it's just more HTML. </p>
  
  <p>On the other hand I don't want to reject the idea without doing some inquiry. </p>
  
  <p>Therefore:</p>
  
  <p><strong>Can someone show me a concrete example of how one can benefit from having such a nested section-wrap structure? Respectively what purpose does it serve?</strong></p>