html, body{height:100%; margin:0;padding:0}
 
.container-fluid{
  height:100%;
  display:table;
  width: 100%;
  padding: 0;
}
 
.row-fluid {height: 100%; display:table-cell; vertical-align: middle;}
 
.centering {
  float:none;
  margin:0 auto;
}