The primary goal is to open the main navigation menu on freizeitpark-plohn.de. Identify and click on the element that triggers the off-canvas menu, which is currently hidden. Once the menu is open, confirm its visibility by identifying at least one visible link within it.
Navigate to 'freizeitpark-plohn.de'. Inspect the visible header area for any interactive elements (buttons, icons, links) that are not part of the currently hidden off-canvas menu. Prioritize elements that visually resemble a menu toggle (e.g., a hamburger icon) or have attributes like 'data-toggle'. Click on the identified menu toggle element. After clicking, verify that the off-canvas menu is now visible and identify at least one clickable link within the newly opened menu (e.g., 'Parkplan', 'Attraktionen', 'Preise').
The agent successfully clicks an element that causes the off-canvas menu to become visible. The agent explicitly states that the menu is now open. The agent identifies and states the text or href of at least one visible link within the newly opened menu, confirming successful menu activation.