Judge the page at desktop size. Focus on the overall visual result and how well it answers the prompt.
Original prompt
I need a pricing page for a product.
Please make it include:
- a top heading that introduces the pricing
- exactly three plan cards, and put the class `pricing-tier` on each card's outer element
- for each plan: a name, a monthly price, a short feature list, and a "Sign up" button
- a layout that stays responsive and does not create horizontal scrolling on a typical desktop screen
Return only the complete HTML document.