Create a captivating and responsive user interface for the refer & earn landing page using React js. The UI should be visually appealing, intuitive, and include a "Refer Now" button that triggers a popup modal with referral form for referring a course. Requirements: Refer & Earn Landing Page: Hero section with a "Refer Now" button. Popup Modal: Mention all the necessary form fields required for capturing the referrer and referee details. Design Considerations: Tailwind CSS for building components and achieving a modern and visually appealing design. Implement form validation for mandatory fields. Note:- do not change any config file of tailwind css and keep the tailwind css as much as orginal and simple but the ui designs looks mordern and also generate the ui component wise. | A shadcn/ui and v0 generation - v0