title: Overflow div inside fixed div
body: <p>Pretty much I already have what I want. The <code>overflow-y</code> I want to be able to be scrolled through if it goes off screen inside the div#scrollable, but once the overflow is there it will not scroll down all the way to option 8 leaving it not visible. Why is this so, and how can I fix it?</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;
  }
  #fixed {
    width: 300px;
    height: 100%;
    max-height: 345px;
    position: fixed;
    background: #333;
    border: 2px solid #333;
  }
  #menu {
    background: pink;
    line-height: 25px;
    padding-left: 20px;
  }
  #scrollable {
    position: absolute;
    height: 100%;
    width: 100%;
    overflow-y: auto;
  }
  
  ul {
    list-style: none;
  }
  ul li a {
    color: white;
    line-height: 40px;
    padding-left: 20px;
    display: block;
  }
  ul li a:hover {
    background: blue;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="fixed"&gt;
    &lt;div id="menu"&gt;
      Hello
    &lt;/div&gt;
    &lt;div id="scrollable"&gt;
      &lt;ul&gt;
        &lt;li&gt;&lt;a&gt;Option 1&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a&gt;Option 2&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a&gt;Option 3&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a&gt;Option 4&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a&gt;Option 5&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a&gt;Option 6&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a&gt;Option 7&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a&gt;Option 8&lt;/a&gt;&lt;/li&gt;
      &lt;/ul&gt;
    &lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p><a href="https://jsfiddle.net/3hm1rxut/2/" rel="nofollow noreferrer">https://jsfiddle.net/3hm1rxut/2/</a></p>