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                <div class="cntr">



  font-family 'Lato', sans-serif
  position relative
  background #000
  border 0
  padding 14px 42px
  border-radius 3px
  cursor pointer
  overflow hidden
  outline none
  font-weight 400
  font-size 12px
  color #fff
  letter-spacing .2em
  box-shadow 0 8px 32px rgba(#000,.2)
  transition all .2s ease
    content ''
    position absolute
    top 0
    left -200%
    width 200%
    height 100%
    transform skewX(-20deg)
    background-image linear-gradient(to right,transparent,rgba(#fff,.3),transparent)    
    animation shine 1.6s ease
    transform translateY(1px)
    box-shadow 0 4px 16px rgba(#000,.2)
  position absolute
  top 50%
  left 50%
  transform translate(-50%, -50%)   

@keyframes shine
    left 200%