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;
}
$none: rgba(#fff, 0);
$blk: #000;
$crater: lighten($blk, 50);
$lte: #fff;

html,
body,
div {
  height: 100%;
}

html {
  font-size: 1vmin;
  background: $blk;
}

body {
  margin: auto;
  overflow: hidden;
}

div {
  transform-style: preserve-3d;
  perspective: 100em;
  position: relative;

*,
  *:before,
  *:after,
  &:after {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    box-sizing: border-box;
    transform-style: preserve-3d;
    backface-visibility: hidden;
  }

&:after {
    width: 50rem;
    height: 50rem;
    background: radial-gradient(
      circle at 40% 40%,
      $none,
      $blk,
      rgba($blk, 0.7)
    );
    transform: translate3d(0, 0, 40rem);
    margin: auto;
    bottom: 0;
    right: 0;
  }
}

moon {
  margin: auto;
  inset: 0;
  width: 81rem;
  height: 81rem;
  background: lighten($crater, 30);
  border-radius: 50%;
  animation: wobble 2s linear infinite;

spin {
    animation: r 10s linear infinite;
    width: 80rem;
    height: 0;
    margin: auto;
    inset: 0;
  }

c {
    width: 80rem;
    height: 1rem;
    z-index: 1;
    font-size: 5rem;

&:before,
    &:after {
      width: 5rem;
      height: 5rem;
      border-radius: 50%;
      transform: rotateY(-90deg);
      background: rgba($blk, 0.05);
      animation: light 10s linear infinite;
      opacity: 0.75;
      border: 0.2rem dashed $none;
    }

&:after {
      background: $lte;
    }
  }

@for $i from 1 through 36 {
    $scale: random(10) * 0.1;

c:nth-of-type(#{$i}) {
      transform: rotate((random(60)) * 1deg) rotateY(#{$i * 10}deg);

&:before,
      &:after {
        animation-delay: -#{$i * 0.277}s;
      }

&:before {
        transform: rotateY(-90deg) scale($scale);
      }

&:after {
        transform: translate3d(-75rem, 0, 0)
          rotateY(90deg)
          scale(random(10) / 10);
      }
    }
  }

@keyframes r {
    to {
      transform: rotateY(360deg);
    }
  }
  @keyframes wobble {
    20% {
      transform: translate3d(0.25rem, 0, 0);
    }

70% {
      transform: translate3d(-0.25rem, 0, 0);
    }
  }

@keyframes light {
    40% {
      box-shadow: 3rem 1rem #000, inset 3rem 1rem #000;
    }

10% {
      box-shadow: -2rem 0.5rem #000, inset -2rem 0.5rem #000;
    }

25% {
      box-shadow: 0.5rem 0.5rem #000, inset 0.5rem 0.5rem #000;
    }
  }
}

.sig {
  &,
  * {
    height: 9.25em;
    overflow: hidden;
    border-radius: 0.5em;
  }

position: absolute;
  left: auto;
  right: 1rem;
  top: 1rem;
  font-size: 0.5rem;
  color: $lte;
  width: 10em;
  transform: skewX(10deg) scaleY(0.45) rotate(2deg);
  mix-blend-mode: difference;

&:before,
  *:before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 5em;
    height: 5em;
    background: currentColor;
    transform: translate3d(-2.5em, 0, 0) rotate(-45deg);
    box-shadow: -3em 3em 0 0 currentColor;
    border-radius: 0.5em 2em 0.5em 2em;
  }

* {
    width: 5em;
    transform: translate3d(3.75em, 0, 0) scaleY(0.95);
    display: block !important;

&:before {
      transform: translate3d(-3em, -2em, 0) rotate(-45deg);
      box-shadow: -3em 3em 0 0 currentColor, -6em 6em 0 0 currentColor;
      border-radius: 0.5em;
    }
  }
}

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