CodePen Embed - How to Give Box Shadow a Border Radius

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div {
  background: #ffd200;
  box-shadow: rgba(0, 0, 0, 0.75) -10px 10px 0px 0px;
  border-radius: 4px;
  height: 250px;
  margin: auto;
  width: 250px;
}

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This Pen is owned by Chandler Moisen on CodePen.

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