<selection class=s1><div class=d>selection s1</div></selection>
<selection class=s2><div class=d>selection s2</div></selection>
<div class=s3><div class=d>div s3</div></div>

.d {
  margin: 5px;
  padding: 5px;
  width: 200px;
  height: 50px;
  box-shadow: inset 0 0 3px 2px silver;
}

.s1, .s2, .s3 {
  background: azure;
}

.s2 {
  display: block;
}