bxSlider with captions above images not overlaying

by user2314737

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/bxslider/4.2.12/jquery.bxslider.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bxslider/4.2.12/jquery.bxslider.css">
<section>
  <h1>Pizzas</h1>
  <p>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.</p>
  <p id="caption"></p>
  <ul class="bxslider" id="slider">
    <li><img src="http://lorempizza.com/600/240/?1" title="Pizza 1" width="100%">   
    </li>
    <li><img src="http://lorempizza.com/600/240/?2" title="Pizza 2" width="100%">
    </li>
    <li><img src="http://lorempizza.com/600/240/?3" title="Pizza 3" width="100%">
    </li>
  </ul>
  <p id="pager"></p>
</section>

CSS

.bx-wrapper img {
  margin-top: 2em;
}

.bx-caption {
  position: relative;
  text-align: center;
  top: 0;
  height: 2em;
  line-height: 1em;
}

JavaScript

$(document).ready(function() {
  $("#slider").bxSlider({
    displaySlideQty: 1,
    moveSlideQty: 1,
    default: false,
    randomStart: true,
    default: false,
    captions: true,
    default: false,
    pager: true,
    default: 'full',
    pagerType: 'short',
    
  });
});