Create a complete, premium e-commerce web app for a medical store named "Lavkush Pharmacy" using React and Tailwind CSS. The app should include:

1. A modern header with the name "Lavkush Pharmacy", search bar, and shopping cart counter.
2. A hero banner highlighting online medicine delivery, COD, and instant Razorpay secure checkout.
3. A product catalog section displaying common medicines/healthcare items with prices, quantities, and an "Add to Cart" button.
4. A functional shopping cart drawer/page where users can review items.
5. A checkout modal/section that gives the user two payment options: "Cash on Delivery (COD)" and "Pay Online via Razorpay", with order confirmation success messages.
   Make the design look professional, medical-themed (using clean blues and emerald greens), and fully respo
   nsive.