Why is my page not displaying?

I have the files in the same folder, it was just working…

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>TEST</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" type="text/css" media="screen" href="style.css" />
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">

<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
	<section>
		<article>
			
			<div class="box"></div>
			
			
			
			
			
			
			
			
			
			
			
			
			
			
			
		</article>
</section>
</body>
</html>
body {
	background: black;
}

.box {
	background: white;
	width: 300px;
	height: 300px;
	position: relative;
	margin: 0 auto;
	top: 200px;
}

Hi,

Place the link to your style.css after the bootstrap css cdn link.