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HTML

              
                input#toggle(type="checkbox")
label(for="toggle")
.backdrop
.scene
  //- Plane that all the 3D stuff sits on
  .plane
    .shadow
    .seat
      .cuboid
        .cuboid__side
          h1
            span 2
            span 0
            span 2
            span 0
        .cuboid__side
        .cuboid__side
        .cuboid__side
        .cuboid__side
        .cuboid__side
          h1
            span 2
            span 0
            span 2
            span 1
              
            
!

CSS

              
                *
  box-sizing border-box
  transform-style preserve-3d

:root
  --perspective 1200
  --rotate-x -40
  --rotate-y -45
  --transform-style preserve-3d
  --cuboid-width 30
  --cuboid-height calc((270 / 480) * var(--cuboid-width))
  --cuboid-depth calc((270 / 480) * var(--cuboid-width))
  --plane-width var(--cuboid-width)
  --plane-height calc((270 / 480) * var(--cuboid-width))
  --exploded 0
  --transition 0.2s
  --speed 0.5s
  --stagger -0.1s
  --bg 'hsl(205, 32%, %s)' % calc((10 + (var(--toggled, 0) * 20)) * 1%)

// gif 480 x 270

body
  min-height 100vh
  overflow hidden
  background var(--bg)
  margin 0

[type="checkbox"]
  height 0
  width 0
  position absolute
  left 100%

label
  height 100vh
  width 100vw
  position absolute
  // background hsla(280, 50%, 50%, 0.4)
  z-index 10

:checked ~ .scene
:checked ~ .backdrop
  --toggled 1

.shadow
  --bg 'hsl(45, 80%, %s)' % calc((0 + (var(--toggled, 0) * 90)) * 1%)
  height 100%
  width 100%
  position absolute
  background radial-gradient(ellipse, var(--bg), transparent)
  transform translate3d(0, calc((50 - (var(--toggled, 0) * 100)) * 1%), 1px) scale(1.15, 1.3)
  will-change transform
  transition transform 0.2s, background 0.2s
  filter blur(10px)

.seat
  height 100%
  width 100%
  transform-origin 50% 0
  transform translate(0, 50%) rotateX(calc(var(--toggled, 0) * 90deg))
  transition transform 0.2s

.scene
  perspective calc(var(--perspective, 800) * 1px)
  transform-style var(--transform-style)
  height 100vh
  width 100vw
  display flex
  align-items center
  justify-content center
  transform translate3d(0, 0, calc((1 * var(--cuboid-depth)) * 2vmin))

.backdrop
  --bg 'hsl(205, 32%, %s)' % calc((5 + (var(--toggled, 0) * 5)) * 1%)
  height 100vh
  width 100vw
  background var(--bg)
  position fixed
  top 0
  left 0
  transition background var(--transition)

.plane
  height calc(var(--plane-height, 25) * 1vmin)
  width calc(var(--plane-width, 25) * 1vmin)
  transform-style var(--transform-style)
  transform rotateX(calc(var(--rotate-x, -24) * 1deg)) rotateY(calc(var(--rotate-y, -24) * 1deg)) rotateX(90deg) translate3d(0, 0, 0)

// This is what makes the CSS variable powered cuboid
.cuboid
  --width var(--cuboid-width, 15)
  --height var(--cuboid-height, 10)
  --depth var(--cuboid-depth, 4)
  height calc(var(--depth) * 1vmin)
  width calc(var(--width) * 1vmin)
  position absolute
  transform translate3d(calc(var(--x, 0) * 1vmin), calc(var(--y, 0) * 1vmin), calc(var(--z, 0) * 1vmin)) rotateX(calc(var(--rotate-cuboid-x, 0) * 1deg)) rotateY(calc(var(--rotate-cuboid-y, 0) * 1deg)) rotateZ(calc(var(--rotate-cuboid-z, 0) * 1deg))
  transform-style var(--transform-style)

  &__side
    transform-style var(--transform-style)
    transition transform 0.25s ease

  & > div:nth-of-type(1)
    height calc(var(--height) * 1vmin)
    width 100%
    transform-origin 50% 50%
    transform rotateX(-90deg)
    position absolute
    top 50%
    left 50%
    transform translate(-50%, -50%) rotateX(-90deg) translate3d(0, 0, calc((var(--depth) / (2 - var(--exploded))) * 1vmin))

  & > div:nth-of-type(2)
    height calc(var(--height) * 1vmin)
    width 100%
    transform-origin 50% 50%
    transform translate(-50%, -50%) rotateX(-90deg) rotateY(180deg) translate3d(0, 0, calc((var(--depth) / (2 - var(--exploded))) * 1vmin))
    position absolute
    top 50%
    left 50%

  & > div:nth-of-type(3)
    height calc(var(--height) * 1vmin)
    width calc(var(--depth) * 1vmin)
    transform translate(-50%, -50%) rotateX(-90deg) rotateY(90deg) translate3d(0, 0, calc((var(--width) / (2 - var(--exploded))) * 1vmin))
    position absolute
    top 50%
    left 50%

  & > div:nth-of-type(4)
    height calc(var(--height) * 1vmin)
    width calc(var(--depth) * 1vmin)
    transform translate(-50%, -50%) rotateX(-90deg) rotateY(-90deg) translate3d(0, 0, calc((var(--width) / (2 - var(--exploded))) * 1vmin))
    position absolute
    top 50%
    left 50%

  & > div:nth-of-type(5)
    height calc(var(--depth) * 1vmin)
    width calc(var(--width) * 1vmin)
    transform translate(-50%, -50%) translate3d(0, 0, calc((var(--height) / (2 - var(--exploded))) * 1vmin))
    position absolute
    top 50%
    left 50%

  & > div:nth-of-type(6)
    height calc(var(--depth) * 1vmin)
    width calc(var(--width) * 1vmin)
    transform translate(-50%, -50%) translate3d(0, 0, calc((var(--height) / (2 - var(--exploded))) * -1vmin)) rotateX(180deg)
    position absolute
    top 50%
    left 50%

.cuboid
  --z calc(var(--cuboid-height) / 2)

.cuboid div
  background hsl(0, 0%, 3%)

  &:nth-of-type(1)
  &:nth-of-type(3)
  &:nth-of-type(4)
  &:nth-of-type(6)
    overflow hidden

    &:before
      content ''
      height calc((2 * var(--cuboid-height)) * 1vmin)
      width calc((2 * var(--cuboid-width)) * 1vmin)
      position absolute
      background-size cover

  &:nth-of-type(1)
    filter brightness(calc(1 + (var(--toggled, 0) * 1)))
    background-color hsl(0, 0%, 5%)
    h1
      opacity calc(1 - var(--toggled, 0))
      transition opacity var(--transition) calc((1 - var(--toggled, 0)) * var(--transition))

    &:before
      top 0
      left 50%
      transform translate(-50%, 0)
      transform-origin 0 0

  &:nth-of-type(3)
    filter brightness(calc(1 + (var(--toggled, 0) * 2)))
    background-color hsl(0, 0%, 8%)
    &:before
      bottom 100%
      left 0
      transform rotate(-90deg) translate(-100%, 50%)
      transform-origin 0 100%

  &:nth-of-type(4)
    &:before
      top 0
      left 100%
      transform rotate(90deg) translate(0, -50%)
      transform-origin 0 0

  &:nth-of-type(6)
    h1
      opacity var(--toggled, 0)

    &:before
      bottom 0
      left 50%
      transform translate(-50%, 0)

:checked ~ .scene .cuboid div
  &:nth-of-type(1):before
  &:nth-of-type(3):before
  &:nth-of-type(4):before
  &:nth-of-type(6):before
    background-size cover
    background-image url(https://media.giphy.com/media/PmSQHu3vBiWG5CbUZh/giphy.gif)

h1
  margin 0
  position absolute
  font-size 10vmin
  font-weight bold
  color hsl(0, 0%, 100%)
  font-family sans-serif
  top 50%
  left 50%
  transform translate(-50%, -50%)
  white-space nowrap

  span
    display inline-block
    animation jump calc(var(--toggled, 0) * var(--speed)) calc(var(--index) * var(--stagger)) infinite

    &:nth-of-type(1)
      --index 0
    &:nth-of-type(2)
      --index 1
    &:nth-of-type(3)
      --index 2
    &:nth-of-type(4)
      --index 3

.cuboid__side:nth-of-type(1) h1
  color hsl(0, 0%, 70%)
  span
    filter drop-shadow(0 0 2px hsl(0, 0%, 100%))
  span:nth-of-type(4)
    animation blinkers 5s infinite

.cuboid__side:nth-of-type(6) h1
  color hsl(0, 0%, 1000%)
  span
    filter drop-shadow(0 0 5px var(--light, hsl(0, 100%, 50%)))

    &:nth-of-type(1)
      --light hsl(0, 80%, 70%)
    &:nth-of-type(2)
      --light hsl(140, 80%, 70%)
    &:nth-of-type(3)
      --light hsl(210, 80%, 70%)
    &:nth-of-type(4)
      --light hsl(290, 80%, 70%)

@keyframes jump
  0%, 100%
    transform translate(0, 0)
  50%
    transform translate(0, -30%)

@keyframes blinkers
  52%, 54%, 56%
    opacity .1
    filter none
  50%, 53%, 55%, 57%, 100%
    filter drop-shadow(0 0 2px hsl(0, 0%, 100%))
    opacity 1
              
            
!

JS

              
                
              
            
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