I have an existing ASP.NET web application that needs a fresh, contemporary look. My top priority is a modern design with a fully responsive layout that works seamlessly on mobile phones, tablets, and desktop computers. Here’s what I’d like delivered: • A clean, minimalist user interface built on ASP.NET (C#) with a responsive framework such as Bootstrap or Tailwind. • Page templates and master-layout updates so every screen automatically adapts to each device size. • Polished HTML / CSS and Razor views optimized for fast load times. • Room in the codebase for future SEO enhancements and AI-driven marketing features (I’m happy to discuss these as a follow-on phase). I’ll provide the current solution, design references, and access to a staging server. Please outline your approach for implementing the new layout, any design tools you prefer, and a realistic timeline for handing over the updated project.