23 - Boxception

<div>
<style>
  * {
    background: #F3AC3C;
  }
  div {
    position: fixed;
    width: 100px;
    height: 100px;
    left: 100px;
    top: 150px;
    box-shadow: 50px -50px 0 50px #1A4341, inset 50px 50px #998235;
  }
</style>