title: HTML Nav bar links not clickable
body: <p>This past week I've been learning HTML and CSS and decided to mess around with a navigation bar. I have it all set up but now the links up top are not clickable?
  I've checked to make sure I didn't miss anything basic like a closing tag but couldn't find anything like that.</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>* {
    margin: 0;
    padding: 0;
  }
  
  html {
    background-color: #808080;
    background-image: url("https://hdqwalls.com/download/simple-gray-abstract-background-wi-1920x1080.jpg");
    background-repeat: no-repeat;
  }
  
  #landing__container {
    height: 100vh;
    width: 100%;
  }
  
  header {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: rgba(255, 0, 0, 0.4);
  }
  
  header h1 {
    color: white;
    font-family: impact;
    font-weight: normal;
  }
  
  header ul {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    height: 30px;
  }
  
  header ul li {
    list-style: none;
  }
  
  header a {
    font-family: helvetica;
    font-weight: bold;
    font-size: 18px;
    text-decoration: none;
    color: white;
    margin: 30px;
  }
  
  #landing__center {
    display: flex;
    flex-direction: column;
    text-align: center;
    justify-content: center;
    align-items: center;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    position: absolute;
  }
  
  #landing__center h2 {
    padding-bottom: 20px;
    color: white;
    font-family: Impact;
    font-weight: normal;
    font-size: 40px;
  }
  
  #landing__center p {
    padding-top: 20px;
    color: white;
    font-family: helvetica;
    font-weight: normal;
    font-size: 20px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
    &lt;head&gt;
      &lt;meta charset="UTF-8" /&gt;
      &lt;meta name="viewport" content="width=device-width, initial-scale=1.0" /&gt;
      &lt;meta http-equiv="X-UA-Compatible" content="ie=edge" /&gt;
      &lt;title&gt;Navigation Bar Practice&lt;/title&gt;
      &lt;link rel="stylesheet" type="text/css" href="style.css" /&gt;
    &lt;/head&gt;
  
    &lt;body&gt;
      &lt;div id="landing__container"&gt;
        &lt;!-- Navigation Bar --&gt;
        &lt;header&gt;
          &lt;nav id="nav__bar"&gt;
            &lt;ul&gt;
              &lt;li&gt;&lt;a href="#"&gt;Home&lt;/a&gt;&lt;/li&gt;
              &lt;li&gt;&lt;a href="#"&gt;Documentation&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 href="#"&gt;Contact&lt;/a&gt;&lt;/li&gt;
            &lt;/ul&gt;
          &lt;/nav&gt;
        &lt;/header&gt;
  
        &lt;section id="landing__center"&gt;
          &lt;h2&gt;Testing&lt;/h2&gt;
          &lt;p&gt;
            Lorem, ipsum dolor sit amet consectetur adipisicing elit. Rem
            voluptatum asperiores illum maiores aliquid quo perferendis,
            blanditiis facere temporibus laudantium!
          &lt;/p&gt;
        &lt;/section&gt;
      &lt;/div&gt;
    &lt;/body&gt;
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>I know the code may not be perfect and/or clean but keep in mind I have been doing this for a week.</p>