814  * CUBE TRANSITION
821 .reveal.cube .slides {  class
825 .reveal.cube .slides section {  class
832 	.reveal.center.cube .slides section {  class
835 	.reveal.cube .slides section:not(.stack):before {  class
847 	.reveal.cube .slides section:not(.stack):after {  class
863 .reveal.cube .slides>section.stack {  class
868 .reveal.cube .slides>section.past {  class
873 .reveal.cube .slides>section.future {  class
878 .reveal.cube .slides>section>section.past {  class
883 .reveal.cube .slides>section>section.future {  class