title: Background image not covering entire page?
body: <p>I've just begun learning about HTML and CSS (and a little Bootstrap) and I'm trying to make a simple scrolling webpage. My problem is that I cannot get the div background image to cover the full height of the page -- it only covers as far as the h2 text, like it thinks the end of that element is the end of the page. I have no idea why it's doing this and I haven't been able to fix it. This has really stumped me and I'm sure it has a really simple solution that I've missed. Any advice would be hugely appreciated. </p>
  
  <p>Here is the <a href="https://codepen.io/rasseda/pen/GMKaLr" rel="nofollow noreferrer">codepen</a>: </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>body {
    background-color: rgb(255, 255, 255);
  }
  
  #front {
    background: url("https://image.ibb.co/mjTmwv/port34.png") no-repeat;
    overflow: hidden;
    background-size: cover;
    width: 100%;
    height: 100%;
  }
  
  #h1 {
    color: white;
    font-size: 50px;
    margin-top: 40vh;
    padding: 10px;
    background: rgba(43, 142, 255, 0.4);
  }
  
  #pt {
    color: white;
    font-size: 30px;
    background: rgba(39, 220, 130, 0.4);
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;ul style="z-index:9;"&gt;
    &lt;li&gt;
      &lt;a class="active" href="#"&gt;&lt;img class="img-fluid" style="width:auto;height:auto;max-height:26px;max-width:20px;" src="https://image.ibb.co/mg1s3a/lyreimage27.png" alt="website icon"&gt;&lt;/img&gt; placeholder inc.&lt;/a&gt;
    &lt;/li&gt;
    &lt;li&gt;&lt;a href="#"&gt;About
        &lt;/a&gt;
    &lt;/li&gt;
    &lt;li&gt;&lt;a style="text-decoration:none" href="#"&gt;Portfolio&lt;/a&gt;
    &lt;/li&gt;
    &lt;li&gt;&lt;a href="#"&gt;Contact&lt;/a&gt;
    &lt;/li&gt;
  &lt;/ul&gt;
  
  &lt;header&gt;
    &lt;div id="front"&gt;
      &lt;div class="container-fluid"&gt;
        &lt;h1 id="h1" class="text-center"&gt;Placeholder&lt;/h1&gt;
        &lt;h2 id="pt" class="text-center"&gt;Placeholder Text&lt;/h2&gt;
  &lt;/header&gt;</code></pre>
  </div>
  </div>
  </p>