Design a polished desktop and tablet interface concept for an AI study assistant that helps learners organize courses, ask questions, review weak topics and plan focused sessions. Present one dominant desktop dashboard with a smaller tablet companion screen behind it on a clean presentation canvas. Include a left navigation rail, course cards, progress rings, weekly study plan, knowledge-map panel, chat assistant area, citation cards and a focused review queue. Use a high-fidelity modern product UI with an accessible light theme, soft depth, restrained rounded components and a consistent education technology design system. Compose a 4:3 landscape view with clear hierarchy and generous spacing. Use warm white, graphite, cobalt blue, mint and small coral status accents. Use only clean abstract lines, simple icons and unlabeled data blocks. No logo, no trademark, no fake brand, no garbled text, no people, no excessive glassmorphism, no watermark.