<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        {% block head %}
        <title>{% block title %}{% endblock %}</title>
        {% endblock %}
    </head>

    <body>
        {% block body %}{% endblock %}
    </body>
    {% block extra %}{% endblock %}
</html>
