Create a high-fidelity mobile UI presentation for a personal finance and expense tracker app. Show one large central smartphone with a balance overview, monthly spending chart, category budgets and recent transactions, plus two slightly offset supporting screens for category analytics and savings goals. Include clear visual states for upcoming bills, goal progress and adding an expense. Use a vertical 3:4 product presentation with warm off-white surfaces, deep navy structure, emerald primary actions and restrained lilac and coral category accents. Build a polished accessible design system with consistent spacing, rounded cards, clear hierarchy and legible chart shapes. Represent content with abstract lines, familiar icons and unlabeled data blocks only. No logos, no trademarked bank identity, no bank name, no readable paragraphs, no garbled text, no hands, no people, no glass effects, no watermark.