<html>
<head>
<style>
.test {
background-color: #fec;
display: inline-block;
width: 5em;
height: 5em;
}
.first {
box-shadow: inset 0 0 1px -3px rgba(0,0,10,0.25);
</style>
</head>
<body>
<div class="first test"></div>
</body>
</html>