Shopify Hidden Menu Integration

I want to tuck a discreet “Limited Edition” link into my store’s home menu so that only shoppers who spot the link can access a hidden page featuring my limited-edition products. The task is to modify my existing Shopify theme (Liquid, CSS, navigation settings) so that:

• the new link appears exactly where I specify in the menu structure, blending in naturally with my current design
• clicking “Limited Edition” opens a private collection page that is otherwise invisible to normal browsing and search
• the link and page inherit my shop’s styling, work across desktop and mobile, and do not slow page load

Please handle all theme edits, create or configure the hidden collection, and test thoroughly before hand-off. I’ll provide theme access and product details once we start; you return clean, well-commented code and a quick guide on how to toggle the link on or off in the future.