html, body, #container {
  height: 100%;
  margin: 0;
  overflow: hidden;
}

header, footer {
  display: block;
}

@headerheight: 153px;
@footerheight: 25px;

#container {
  //Set padding on container so that #main can take 100% height
  //If we don't do it, the scrollbars will be too large.
  padding: @headerheight 0 @footerheight;
}

header {
  height: @headerheight;
  //Substract #container padding
  margin-top: -@headerheight;
}

#main {
  height: 100%;
  display: block;
  overflow-y: auto;
}

footer {
  //This starts at the beginning of the #container padding, all fine.
  height: @footerheight;
  line-height: @footerheight;
}