html{
height: 100%;
min-height: 100%;
/* Permalink - use to edit and share this gradient: http://colorzilla.com/gradient-editor/#ffffff+0,c0deed+100 */
background: #ffffff; /* Old browsers */
background: -moz-linear-gradient(top,  #ffffff 0%, #c0deed 100%); /* FF3.6-15 */
background: -webkit-linear-gradient(top,  #ffffff 0%,#c0deed 100%); /* Chrome10-25,Safari5.1-6 */
background: linear-gradient(to bottom,  #ffffff 0%,#c0deed 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#c0deed',GradientType=0 ); /* IE6-9 */
}



.frame {
    height: 100%;      /* equals max image height */
    width: 100%;
    
    
    text-align: center; margin: 1em 0;
}

.helper {
    display: inline-block;
    height: 100%;
    vertical-align: middle;
}