Redesign the existing UI while preserving all core functionality and content. Transform it into a modern, premium, and highly professional interface that follows current UI/UX best practices. Design Requirements: Keep all existing features and user flows intact. Create a clean, minimal, and elegant layout with excellent visual hierarchy. Improve spacing, alignment, padding, and overall consistency using an 8px spacing system. Use modern typography with clear heading, subheading, and body text styles. Replace outdated components with sleek, contemporary UI elements. Design intuitive cards, buttons, input fields, navigation, and dialogs with consistent styling. Apply subtle shadows, rounded corners, and smooth transitions where appropriate. Improve accessibility by ensuring proper contrast, readable font sizes, and touch-friendly interactive elements. Use a cohesive color palette with a professional appearance while maintaining the existing brand identity (or enhance it if necessary). Make the design responsive for mobile, tablet, and desktop. Reduce visual clutter and improve readability. Use consistent iconography and modern illustrations only where they add value. Ensure every screen feels polished, premium, and production-ready. UX Improvements: Simplify navigation and reduce unnecessary user actions. Improve information architecture and content organization. Highlight primary actions with clear call-to-action buttons. Add appropriate empty states, loading states, success states, and error states. Ensure forms provide clear validation and helpful feedback. Visual Style: Modern SaaS aesthetic. Minimalistic and elegant. Soft shadows and subtle gradients (avoid excessive effects). Consistent border radius. Balanced use of whitespace. Professional animations and micro-interactions. Output Expectations: Do not remove or change any functionality unless it significantly improves usability. Redesign every screen for a cohesive design system. Create reusable components following modern design system principles. Deliver a polished interface comparable to high-quality products from Stripe, Notion, Linear, Airbnb, or Apple. The final result should feel like a premium, enterprise-grade application ready for production.