সিএসএস box-shadow

<!DOCTYPE html>
<html>
<head>
<style>
h1 {
  box-shadow: 5px 5px 10px gray;
  padding: 15px;
  width: fit-content;
}
</style>
</head>
<body>

<h1>সিএসএস</h1>

</body>
</html>