def html(title, body):
    """Wrap the body HTML in a mobile-friendly HTML5 page with given title and CSS file
    'style.css' from the static content directory."""
    return """<!DOCTYPE html>
<HTML>
<HEAD>
<TITLE>{}</TITLE>
<META name="viewport" content="width=device-width, initial-scale=1.0">
<LINK rel="stylesheet" href="/style.css" type="text/css">
</HEAD>
<BODY>
{}
</BODY>
</HTML>
""".format(title, body)