<div class="paper">
    Howdy
</div>
.paper {
  background: #fff;
  box-shadow:
    /* The top layer shadow */
    0 -1px 1px rgba(0,0,0,0.15),
    /* The second layer */
    0 -10px 0 -5px #eee,
    /* The second layer shadow */
    0 -10px 1px -4px rgba(0,0,0,0.15),
     /* The third layer */
    0 -20px 0 -10px #eee,
    /* The third layer shadow */
    0 -20px 1px -9px rgba(0,0,0,0.15);
    /* Padding for demo purposes */
    padding: 30px;
}

body {
  background-color: #333;
  padding: 2em;
}

External CSS

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External JavaScript

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