Untitled

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
<style id="jsbin-css">
.block {
  height: 100px;
  padding: 10px;
  margin: 10px;
  border: 1px solid pink;
  background: #ccc;
}
</style>
</head>
<body>

  <div class="block">
    hello
  </div>


<script id="jsbin-source-css" type="text/css">.block {
  height: 100px;
  padding: 10px;
  margin: 10px;
  border: 1px solid pink;
  background: #ccc;
}</script>
</body>
</html>