title: How to align div above and below?
body: <p>Below are two div's that have another two div's below it. I would like to layer them so that they are perfectly aligned below.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.box {
    display: flex;
  }
  
  .left {
    flex: 1;  /* grow */
    border: 1px dashed #f0f;
  }
  
  .right {
    flex: 0 0 250px; /* do not grow, do not shrink, start at 250px */
    border: 1px dashed #00f;
  }
  
  .leftTop {
    position: absolute;
    /* what to do here? */
  }
    
  .rightTop {
    position: absolute;
    /* what to do here? */
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="box"&gt;
    &lt;div class="left"&gt;Left&lt;/div&gt;
    &lt;div class="right"&gt;Right 250px&lt;/div&gt;
    &lt;div class="leftTop"&gt;Left Top Layer&lt;/div&gt;
    &lt;div class="rightTop"&gt;Right Top Layer&lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>I do not get the same effect for the top layer when I duplicate the left and right for the top.</p>