title: Fill remaining vertical space - only CSS
body: <p>I need to fill the <strong>remaining vertical space</strong> of <code>#wrapper</code> under <code>#first</code> with <code>#second</code> div.</p>
  
  <p>I need an only CSS solution.</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>#wrapper {
    width: 300px;
    height: 100%;
  }
  
  #first {
    width: 300px;
    height: 200px;
    background-color: #F5DEB3;
  }
  
  #second {
    width: 300px;
    height: 100%;
    background-color: #9ACD32;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="wrapper"&gt;
    &lt;div id="first"&gt;&lt;/div&gt;
    &lt;div id="second"&gt;&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>