<div class='box'></div>
$r: 2em;

.box {
	overflow: hidden;
	position: relative;
  outline: solid 3px #000;
  max-width: 15em;
  min-height: 10em;
	
	&:before {
    position: absolute;
		margin: -$r;
    padding: $r;
		border-radius: 50%;
		box-shadow: 0 0 7px #b53;
		background: #f90;
    content: ''
  }
}
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