All basic question types

app/controllers/application_controller.rb

@@ -1,4 +1,16 @@
 class ApplicationController < ActionController::Base
   # Only allow modern browsers supporting webp images, web push, badges, import maps, CSS nesting, and CSS :has.
   allow_browser versions: :modern
+
+  before_action :require_authorization
+
+  def authorized?
+    cookies.signed[:_entrance_exam_authorized].present?
+  end
+
+  private
+
+  def require_authorization
+    redirect_to new_sessions_path unless authorized?
+  end
 end