<!DOCTYPE html>
<html>
<head>
<title>404 Not Found</title>
<style>
body { font-family: Arial, sans-serif; text-align: center; padding: 50px; }
h1 { color: #333; }
p { color: #666; }
</style>
</head>
<body>
<h1>404 Not Found</h1>
<p>The requested resource was not found on this server.</p>
</body>
</html>