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HTML 

              
                mixin egg()
  block.egg-wrapper
    .shadow
      .main
      .secondary
    .egg
      .fill
      .shading
      .key
      .highlight
      .egg-shadow
    .egg-wrapper.rotate
      .egg
        .fill
        .shading
        .key
        .highlight
        .egg-shadow

input(type='checkbox' checked)

.stage
  .light

- for (var i = 0; i < 3; i++)
  +egg

.title
!

CSS 

              
                html
  height: 100%

body
  background: radial-gradient(#CCC, #222)
  display: flex
  align-items: center
  justify-content: center
  height: 100%
  overflow: hidden

.title
  position: fixed
  left: 0
  right: 0
  bottom: 50%
  margin-bottom: 14vw
  text-align: center
  font-weight: 100
  font-size: 3vw
  color: #FFF
  opacity: 0.25
  
.egg-wrapper + .title::before
  content: 'css egg'

.egg-wrapper + .egg-wrapper + .title::before
  content: 'css eggs'

input
  position: fixed
  z-index: 1
  bottom: 50%
  width: 15vw
  height: 20vw
  cursor: pointer
  opacity: 0
  margin-bottom: -10vw
  
.stage
  position: absolute
  z-index: -2
  width: 100vw
  height: 150vw
  perspective: 50vw
  transition: filter 2s
  
  .light
    width: 100%
    height: 100%
    background: #FFF
    border-radius: 50%
    transform: rotateX(80deg)

.egg-wrapper
  position: relative
  width: 15vw
  height: 20vw
  margin: 0 0.3vw
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%
  
  &:not(.rotate)
    animation-name: move
    animation-duration: 3s
    animation-timing-function: cubic-bezier(0.455, 0.030, 0.515, 0.955)
    animation-iteration-count: infinite
  
  &.rotate
    transform: scale(1,-1)
    z-index: -1
    opacity: 1
    margin-top: -1vw
    opacity: 0.25
    -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0) 0%,rgba(0,0,0,1) 100%)
  
  .egg
    position: relative
    width: 100%
    height: 100%
    border-radius: inherit
    overflow: hidden
    background: #DDD
    transform: translate3d(0,0,0) rotate(0deg)
    transform-origin: center 60% !important
    animation-name: wobble
    animation-duration: 3s
    animation-timing-function: cubic-bezier(0.455, 0.030, 0.515, 0.955)
    animation-iteration-count: infinite
  
    .fill
      position: absolute
      left: -12%
      top: -10%
      width: 130%
      height: 124%
      border-radius: inherit
      box-shadow: inset 0 0 0 2.5vw #FFF
      opacity: 0.4
      transition: filter 2s

    .shading
      position: absolute
      left: 10%
      top: 27%
      width: 60%
      height: 85%
      background: #000
      border-radius: inherit
      transform: rotate(-20deg)
      opacity: 0.25
      transition-property: filter, opacity
      transition-duration: 2s

    .key
      position: absolute
      left: 55%
      top: 5%
      width: 35%
      height: 55%
      background: #F4F4F4
      border-radius: inherit
      transform: rotate(-20deg)
      transition-property: filter, background
      transition-duration: 2s

    .highlight
      position: absolute
      left: 70%
      top: 5%
      width: 20%
      height: 30%
      background: #FFF
      border-radius: inherit
      transform: rotate(-20deg)
      transition: filter 2s
    
    .egg-shadow
      position: absolute
      right: -33%
      top: 36%
      width: 40%
      height: 50%
      border-radius: 50%
      background: #000
      opacity: 0.2
      transition-property: filter, opacity
      transition-duration: 2s
      animation-name: move
      animation-duration: 3s
      animation-timing-function: cubic-bezier(0.455, 0.030, 0.515, 0.955)
      animation-iteration-count: infinite
  
  .shadow
    position: absolute
    left: 8.6vw
    top: 3.5vw
    width: 100%
    height: 100%
    border-radius: inherit
    perspective: 50vw
    transition-property: filter, opacity
    transition-duration: 2s
    
    .main
      position: absolute
      right: 0
      width: 400%
      height: 88%
      border-radius: inherit
      transform-origin: center bottom
      transform: rotateX(90deg) rotateZ(90deg)
      opacity: 0.57
    
      &::before
        content: ''
        display: block
        width: 100%
        height: 100%
        border-radius: inherit
        background: #000
        transition: filter 2s
    
    .secondary
      position: absolute
      z-index: 2
      left: -4.8vw
      top: 13.5vw
      width: 6vw
      height: 6vw
      background: #000
      border-radius: 50%
      transform: rotateX(-66deg)
      transition: filter 2s

block:last-of-type .egg-shadow
  display: none
      
input:checked
  ~ .stage
    filter: blur(8vw)
  ~ .egg-wrapper
    .fill
      filter: blur(0.6vw)
    .shading
      filter: blur(3vw)
      opacity: 0.6
    .key
      background: #FFFFFF
      filter: blur(2.3vw)
    .highlight
      filter: blur(1.2vw)
    .egg-shadow
      filter: blur(2vw)
      opacity: 0.5
    .shadow
      filter: blur(0.5vw)
      .main::before
        filter: blur(5vw)
      .secondary
        filter: blur(2.7vw)

@keyframes wobble
  0%
    transform: translate3d(0,0,0) rotate(-8deg)
  50%
    transform: translate3d(0,0,0) rotate(8deg)
  100%
    transform: translate3d(0,0,0) rotate(-8deg)

@keyframes move
  0%
    transform: translate(-1vw)
  50%
    transform: translate(1vw)
  100%
    transform: translate(-1vw)
!

JS
!
999px

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