title: Creating a fixed header with flexbox
body: <p>Using flexbox I'm trying to create a fixed header that includes only two elements and these elements are as far away from each other as possible. I cannot seem to get this to work with <code>justify-content: space-between</code>.</p>
  
  <p>I expected this CSS code to work but the elements are just sitting next to each other.</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>header {
    width: 100%;
    position: fixed;
    display: flex;
    align-content: space-between;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;header&gt;
  &lt;a&gt;
    LOGO
    &lt;/a&gt;
    &lt;a&gt;
    MENU
    &lt;/a&gt;
  &lt;/header&gt;</code></pre>
  </div>
  </div>
  </p>