<!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"> <link rel="stylesheet" href="{{ url_for('static', filename='css/main.css') }}"> <!-- jinja2 syntax(flask) --> {% block head%}{% endblock %} </head> <body> {% block body%}{% endblock %} </body> </html>