title: Using CSS, how to I change the vertical order of div blocks?
body: <p>I've got a header/logo with div blocks on the right and left:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>  .wrap .title-area {
      position: absolute;
      top: 0;
      width: 100%
    }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="wrap"&gt;
    &lt;div class="header-left-box"&gt;
      &lt;p&gt;abcd-left box&lt;/p&gt;
    &lt;/div&gt;
    &lt;div class="title-area"&gt;
      &lt;p&gt;abcd-header&lt;/p&gt;
    &lt;/div&gt;
    &lt;div class="header-right-box"&gt;
      &lt;p&gt;abcd right box&lt;/p&gt;
    &lt;/div&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>I styled it with 30%, 40%, 30% width and each has float:left to give the results I need. On reduced screen size, I give each div box 100% width so they stack. But because I want the logo box at the top, I give the style.</p>
  
  <p>That brings the header to the top but the header-left-box also stays at the top, under the header. How can I arrange those as needed without them overlapping?</p>