<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
.box {
width: 180px;
height: 180px;
background: #d9dbda;
margin: 20px 50px;
}
.inner-border {
border: 20px solid #d9dbda;
box-shadow: inset 0px 0px 0px 10px #969696;
box-sizing: border-box;
}
.inner-outline {
outline: 10px solid lightblue;
outline-offset: -30px;
}
</style>
</head>
<body>
<h2>Border inside a Div</h2>
<div class="box inner-border"></div>
<h2>Outline Inside a Div</h2>
<div class="box inner-outline"></div>
</body>
</html>