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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              ul.threeD
   li
      a(href="#") 
         span.down one
         span.up one
         
   li
      a(href="#") 
         span.down two   
         span.up two
   li
      a(href="#")  
         span.down three
         span.up three
         
   li
      a(href="#") 
         span.down four 
         span.up four
          
            
          
!
            
              @import url(https://fonts.googleapis.com/css?family=Alfa+Slab+One)

@keyframes zIndex
   form
      z-index: 1
   to
      z-index: 0

$height: 50px
$downColor: #779
$upColor: #e87
$time: 250ms


body
   font-family: 'Alfa Slab One', sans-serif
   
ul.threeD
   background: #779
   display: table
   width: 100%
   margin-top: 10px
   li
      display: block
      float: left
      perspective: 200px
      position: relative
      z-index: 0
      animation: zIndex $time ease-in-out
      &:hover 
         z-index: 1
      a
         display: block
         text-decoration: none
         display: block
         text-align: center
         height: $height

         transform-style: preserve-3d
         transition: transform $time ease-in-out
         transform: translateZ( round($height / -2 )) 
         
         .up, .down
            display: block
            height: $height
            line-height: $height
            padding: 0 20px
            
         .up
            color: lighten($upColor, 30%)
            background: darken($upColor, 20%)
            transform: rotateX(90deg) translateZ( round($height * 1.5 ) )
            transition: background $time ease-in-out
         .down
            color: lighten($downColor, 30%)
            background: $downColor
            transform: translateZ( round($height / 2 ) )
            transition: background $time ease-in-out
            
         &:hover 
            transform: translateZ( round($height / -2 ) ) rotateX(-90deg) 

            .up
               background: $upColor
            .down
               background: darken($downColor, 20%)
            
            
            
          
!
999px
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