Multi-Branched POS management system for retails and wholesales

Design a professional POS interface for a restaurant management system called PaxRest. Important: The application already has a left sidebar navigation and top header, so do not generate a new dashboard layout. Only design the main POS workspace area that appears inside the existing layout. Design Style Use a modern enterprise SaaS design similar to the Stripe Dashboard and Linear. Requirements: clean professional interface minimal icons no emojis neutral colors (white, gray, subtle blue) clear typography optimized for fast order entry responsive for tablets and POS touch screens avoid flashy UI or gradients