Code Playground

@charset "UTF-8";
@import url(https://fonts.googleapis.com/css?family=Nunito+Sans:300,400,600,700,800);
*,
:after,
:before {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
$background: #4d6d5d;

$yellow: #f5fccd;
$brown: #ff7d66;
$nose: #eac5a1;
$black: #000038;
$white: #fff;
$blue: #419197;
$light-blue: #78d6c6;

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  padding: 0;
  background-color: $background;
  overflow: hidden;
}

.toggle {
  $component-class: &;
  position: relative;
  display: flex;
  justify-content: space-between;
  width: 20rem;
  height: 10rem;
  border-radius: 5rem;
  background: radial-gradient(circle at 50% 0, $yellow, $brown 300%);
  cursor: pointer;
  overflow: hidden;
  transition: all 0.5s ease;
  &:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAMAAAAp4XiDAAAAUVBMVEWFhYWDg4N3d3dtbW17e3t1dXWBgYGHh4d5eXlzc3OLi4ubm5uVlZWPj4+NjY19fX2JiYl/f39ra2uRkZGZmZlpaWmXl5dvb29xcXGTk5NnZ2c8TV1mAAAAG3RSTlNAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEAvEOwtAAAFVklEQVR4XpWWB67c2BUFb3g557T/hRo9/WUMZHlgr4Bg8Z4qQgQJlHI4A8SzFVrapvmTF9O7dmYRFZ60YiBhJRCgh1FYhiLAmdvX0CzTOpNE77ME0Zty/nWWzchDtiqrmQDeuv3powQ5ta2eN0FY0InkqDD73lT9c9lEzwUNqgFHs9VQce3TVClFCQrSTfOiYkVJQBmpbq2L6iZavPnAPcoU0dSw0SUTqz/GtrGuXfbyyBniKykOWQWGqwwMA7QiYAxi+IlPdqo+hYHnUt5ZPfnsHJyNiDtnpJyayNBkF6cWoYGAMY92U2hXHF/C1M8uP/ZtYdiuj26UdAdQQSXQErwSOMzt/XWRWAz5GuSBIkwG1H3FabJ2OsUOUhGC6tK4EMtJO0ttC6IBD3kM0ve0tJwMdSfjZo+EEISaeTr9P3wYrGjXqyC1krcKdhMpxEnt5JetoulscpyzhXN5FRpuPHvbeQaKxFAEB6EN+cYN6xD7RYGpXpNndMmZgM5Dcs3YSNFDHUo2LGfZuukSWyUYirJAdYbF3MfqEKmjM+I2EfhA94iG3L7uKrR+GdWD73ydlIB+6hgref1QTlmgmbM3/LeX5GI1Ux1RWpgxpLuZ2+I+IjzZ8wqE4nilvQdkUdfhzI5QDWy+kw5Wgg2pGpeEVeCCA7b85BO3F9DzxB3cdqvBzWcmzbyMiqhzuYqtHRVG2y4x+KOlnyqla8AoWWpuBoYRxzXrfKuILl6SfiWCbjxoZJUaCBj1CjH7GIaDbc9kqBY3W/Rgjda1iqQcOJu2WW+76pZC9QG7M00dffe9hNnseupFL53r8F7YHSwJWUKP2q+k7RdsxyOB11n0xtOvnW4irMMFNV4H0uqwS5ExsmP9AxbDTc9JwgneAT5vTiUSm1E7BSflSt3bfa1tv8Di3R8n3Af7MNWzs49hmauE2wP+ttrq+AsWpFG2awvsuOqbipWHgtuvuaAE+A1Z/7gC9hesnr+7wqCwG8c5yAg3AL1fm8T9AZtp/bbJGwl1pNrE7RuOX7PeMRUERVaPpEs+yqeoSmuOlokqw49pgomjLeh7icHNlG19yjs6XXOMedYm5xH2YxpV2tc0Ro2jJfxC50ApuxGob7lMsxfTbeUv07TyYxpeLucEH1gNd4IKH2LAg5TdVhlCafZvpskfncCfx8pOhJzd76bJWeYFnFciwcYfubRc12Ip/ppIhA1/mSZ/RxjFDrJC5xifFjJpY2Xl5zXdguFqYyTR1zSp1Y9p+tktDYYSNflcxI0iyO4TPBdlRcpeqjK/piF5bklq77VSEaA+z8qmJTFzIWiitbnzR794USKBUaT0NTEsVjZqLaFVqJoPN9ODG70IPbfBHKK+/q/AWR0tJzYHRULOa4MP+W/HfGadZUbfw177G7j/OGbIs8TahLyynl4X4RinF793Oz+BU0saXtUHrVBFT/DnA3ctNPoGbs4hRIjTok8i+algT1lTHi4SxFvONKNrgQFAq2/gFnWMXgwffgYMJpiKYkmW3tTg3ZQ9Jq+f8XN+A5eeUKHWvJWJ2sgJ1Sop+wwhqFVijqWaJhwtD8MNlSBeWNNWTa5Z5kPZw5+LbVT99wqTdx29lMUH4OIG/D86ruKEauBjvH5xy6um/Sfj7ei6UUVk4AIl3MyD4MSSTOFgSwsH/QJWaQ5as7ZcmgBZkzjjU1UrQ74ci1gWBCSGHtuV1H2mhSnO3Wp/3fEV5a+4wz//6qy8JxjZsmxxy5+4w9CDNJY09T072iKG0EnOS0arEYgXqYnXcYHwjTtUNAcMelOd4xpkoqiTYICWFq0JSiPfPDQdnt+4/wuqcXY47QILbgAAAABJRU5ErkJggg==);
    opacity: 0.6;
  }
  &:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 5rem;
    box-shadow: inset 0 0.1rem 0.4rem 0 black;
    outline: 1rem solid $background;
    z-index: 1;
    transition: all 0.5s ease;
  }
  &:hover {
    &:after {
      box-shadow: inset 0 0.1rem 0.6rem 0 black;
    }
  }
  &__eyelid {
    position: absolute;
    top: 2.6rem;
    width: 6rem;
    height: 5.5rem;
    border-radius: 50%;
    background: radial-gradient($brown -200%, transparent);
    &:before {
      content: "";
      position: absolute;
      top: -1.5rem;
      width: 9rem;
      height: 7rem;
      border-radius: 50%;
      background: linear-gradient($brown -100%, transparent 50%);
      transition: top 0.5s ease;
    }
    &--left {
      left: 2rem;
      &:before {
        left: -2rem;
      }
    }
    &--right {
      right: 2rem;
      &:before {
        right: -2rem;
      }
    }
  }
  &__eye {
    position: relative;
    width: 6rem;
    height: 5rem;
    margin: 2.5rem 2rem 1.5rem;
    background-color: $white;
    border-radius: 50%;
    border-top: 0.5rem solid $black;
    overflow: hidden;
    transition: all 0.5s ease;
    &:before {
      content: "";
      position: absolute;
      top: calc(50% - 2rem);
      left: 1rem;
      width: 4rem;
      height: 4rem;
      border-radius: 50%;
      background: radial-gradient($black, $black 30%, $blue 30%, $light-blue);
    }
    &:after {
      content: "";
      position: absolute;
      top: calc(50% - 1.8rem);
      left: 2rem;
      width: 2rem;
      height: 1rem;
      background: linear-gradient($white, transparent 200%);
      border-radius: 50%;
    }
  }
  &__nose {
    position: absolute;
    bottom: 0;
    left: calc(50% - 2rem);
    border-left: 1rem solid transparent;
    border-right: 0rem solid transparent;
    border-bottom: 5rem solid $nose;
    &:after {
      content: "";
      position: absolute;
      top: 0;
      left: 2rem;
      border-left: 0rem solid transparent;
      border-right: 1rem solid transparent;
      border-bottom: 5rem solid $nose;
    }
  }
  &:not(&--active) {
    #{$component-class}__eyelid--right {
      &:before {
        top: -1rem;
      }
    }
    #{$component-class}__eye--right {
      height: 0;
      margin-top: 5.6rem;
      border-top: 2px solid $black;
      border-bottom: 1px solid $black;
    }
  }
  &--active {
    #{$component-class}__eyelid--left {
      &:before {
        top: -1rem;
      }
    }
    #{$component-class}__eye--left {
      height: 0;
      margin-top: 5.6rem;
      border-top: 2px solid $black;
      border-bottom: 1px solid $black;
    }
  }
}

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