templates/base.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>{% block title %}TalkToDoc{% endblock %}</title>
  <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}">
</head>
<body class="{% block body_class %}{% endblock %}">
  <a class="skip-link" href="#main-content">Skip to main content</a>
  <div class="app-shell {% block shell_class %}{% endblock %}">
    {% block header %}{% endblock %}
    <main class="app-main" id="main-content">
      {% block content %}{% endblock %}
    </main>
  </div>
  <div class="toast" id="toast" role="status" aria-live="polite"></div>
  <script src="{{ url_for('static', filename='js/shared.js') }}"></script>
  {% block scripts %}{% endblock %}
</body>
</html>