<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Scheduled maintenance</title>
<style type="text/css">
h1 { text-align: center; }
</style>
</head>
<body>
<h1>Site temporarily unavailable due to scheduled maintenance</h1>
</body>
</html>
Also see: Tab Triggers