<!DOCTYPE html>
<html>
<head>
<title>Stylesheets tests</title>
<meta charset="utf-8">
<style>
main {
margin: 20px;
}
</style>
<link rel="stylesheet" href="stylesheet1.css"/>
</head>
<body>
<main>
<main>
<div>Stylesheet Tests</div>
</main>
</main>
</body>
</html>