Sticky Footer into main app

index.html

<main>
  <section class="container">
    <footer class="footer"></footer>
  </section>  
</main>

style.css

/* your reset*/

html, 
body {
  height:100%;
}

.container {
  position:relative;
  min-height:100%; 
  width:1000px; 
  margin:0 auto;
  background:#ccc;
}

.container:after {
  content:'';
  height:200px;
  display:block;
}

.footer {
  position:absolute;
  bottom:0;
  height:200px;
  width:1000px;
  background:#999
}