.panelrt {
    margin: 0%;
    width: 100%;
    height: 55%;  
    position: absolute;
    -webkit-perspective: 400px;
    -moz-perspective: 400px;
    -ms-perspective: 400px;
    -o-perspective: 400px;
}
/* -- make sure to declare a default for every property that you want animated -- */
/* -- general styles, including Y axis rotation -- */
.panelrt .frontrt {
    
    cursor:pointer;
    position: absolute;
    
    top: 0%;
    z-index: 900;
    width: inherit;
    height: 100%;
    text-align: center;
    -webkit-transform: rotateX(0deg) rotateY(0deg);
    -webkit-transform-style: preserve-3d;
    -webkit-backface-visibility: hidden;
    
    -ms-transform: rotateX(0deg) rotateY(0deg);
    -ms-transform-style: preserve-3d;
    -ms-backface-visibility: hidden;
    
    -o-transform: rotateX(0deg) rotateY(0deg);
    -o-transform-style: preserve-3d;
    -o-backface-visibility: hidden;
    
    -moz-transform: rotateX(0deg) rotateY(0deg);
    -moz-transform-style: preserve-3d;
    -moz-backface-visibility: hidden;
    /* -- transition is the magic sauce for animation -- */
    
    -o-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -webkit-transition: all .4s ease-in-out;
    transition: all .4s ease-in-out;
}
.panelrt.flip .frontrt {
    z-index: 900;
    -webkit-transform: rotateY(180deg);
    -moz-transform: rotateY(180deg);
    -ms-transform: rotateY(180deg);
    -o-transform: rotateY(180deg);
}
.panelrt .backrt {
    position: absolute;
    top: 0%;
    z-index: 800;
    width: inherit;
    height: 100%;

    text-align: center;
    -webkit-transform: rotateY(-180deg);
    -webkit-transform-style: preserve-3d;
    -webkit-backface-visibility: hidden;
    
    -ms-transform: rotateY(-180deg);
    -ms-transform-style: preserve-3d;
    -ms-backface-visibility: hidden;
    
    -o-transform: rotateY(-180deg);
    -o-transform-style: preserve-3d;
    -o-backface-visibility: hidden;

    -moz-transform: rotateY(-180deg);
    -moz-transform-style: preserve-3d;
    -moz-backface-visibility: hidden;
    /* -- transition is the magic sauce for animation -- */
    -o-transition: all .4s ease-in-out;
    -ms-transition: all .4s ease-in-out;
    -moz-transition: all .4s ease-in-out;
    -webkit-transition: all .4s ease-in-out;
    transition: all .4s ease-in-out;
}
.panelrt.flip .backrt {
    z-index: 1000;
    -webkit-transform: rotateX(0deg) rotateY(0deg);
    -moz-transform: rotateX(0deg) rotateY(0deg);
    -ms-transform: rotateX(0deg) rotateY(0deg);
    -o-transform: rotateX(0deg) rotateY(0deg);
}