I create a fiddle here: http://jsfiddle.net/WayDf/27/
How can I get the four white boxes which is contained within a ul to be horizontally centered within the red bar? I've tried many things to footer #social ul I just cannot figure it out. I have ready through the many posts on this topic and have tried many things which have been suggested before, none which I can get to work on my particular issue. What am I missing?
footer {
  width: 100%;
  position: relative;
  background-color: #C5C5C5;
  display: block;
  overflow: hidden;
}
footer section#footer-content {
  max-width: 1440px;
  min-height: 50px;
  margin: 30px auto;
  padding: 0 .694444%;
  /* 10px / 1440px */
  position: relative;
  display: block;
  overflow: hidden;
}
footer #social {
  height: 30px;
  margin: 0 auto;
  background-color: red;
  width: 600px;
  position: relative;
}
footer #social ul {
  list-style: none;
  width: 100%;
  margin: 0 50%;
}
footer #social li {
  float: left;
  margin: 0 .3em;
  position: relative;
  display: block;
  width: 30px;
  height: 30px;
  overflow: hidden;
}
footer #social a {
  text-decoration: none;
  color: #CC7D29;
  background: #ffffff;
  display: block;
  text-align: center;
  height: 30px;
}<footer>
  <section id="footer-content">
    <div id="social">
      <ul>
        <li>
          <a href="#"></a>
        </li>
        <li>
          <a href="#"></a>
        </li>
        <li>
          <a href="#"></a>
        </li>
        <li>
          <a href="#"></a>
        </li>
      </ul>
    </div>
  </section>
</footer> 
    