Untitled

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Overlay UI</title>
  <link rel="stylesheet" href="overlay.css">
</head>
<body>
  <div id="overlay">
    <h1>Hello, Overlay!</h1>
    <button id="close-btn">Close</button>
  </div>
  <script src="overlay.js"></script>
</body>
</html>
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