.moon
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body
  background: #12203d
  
.moon
  position: absolute
  background: #25343f
  border-radius: 50%
  box-shadow: inset 30px -20px 0px 10px #eec881, 0px 0px 200px -20px #7d665d
  width: 200px
  height: 200px
  top: 50%
  left: 50%
  margin: -100px -100px
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External CSS

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