Use solid backgrounds on category sections for a cleaner, more modern look

Updates CSS to use solid background colors instead of gradients for section elements.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: dec54137-d5a2-4406-8ad4-5f2f9fb110bf
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/f8c208d1-a7dd-46e2-b7f9-f3b112ddab24.jpg

replit.md

@@ -234,7 +234,9 @@ Preferred communication style: Simple, everyday language.
 - ✅ Modern search interface with clear result counting and active search indicators
 - ✅ Dual export options (PDF and CSV) for regulatory compliance reporting
 - ✅ Enhanced save button with more prominent green color for better visibility
-- ✅ Added subtle background colors to each form category (vendor, product, client, identity)
+- ✅ Added visible solid background colors to each form category (vendor, product, client, identity)
+- ✅ Removed section borders for cleaner design with color-coded backgrounds
+- ✅ Added border to reset button for better visibility
 - ✅ Optimized border thickness for better balance between visibility and aesthetics
 
 ### Docker Configuration & Cleanup (January 9, 2025)