Designing for all 5 UI states (Ideal, Empty, Error, Loading, Success) and auditing feedback loops using Norman’s 7 Stages of Action. Building production-grade buttons, input fields, and cards with nested variants, component properties, and state overrides.

Utilizing string, boolean, and number variables to drive no-code UI logic, dynamic counters, and price calculations. Keyboard navigation, inline validation, focus states, input masking, and real-time visual feedback loops.

Dan Saffer’s micro-interaction framework applied to hover, press, drag, and swipe interactions (e.g., card decks, pull-to-refresh). Applying Fitts's Law to touch targets, gesture conflict resolution, and specifying haptic/auditory cues alongside micro-copy.

Maintaining visual context across screens using shared elements, master-detail transitions, and spatial continuity. Applying custom easing curves (ease-in, ease-out, cubic-bezier), duration rules (200ms–400ms), and spring physics to UI elements.

Drafting task scenarios, success metrics, and setting up rapid unmoderated usability tests using tools like Maze or Useberry. Analyzing user testing metrics (misclick rates, task completion time, drop-off points) to identify and fix interaction bottlenecks.

Refining motion timing based on user test results, fixing edge-case behaviors, and ensuring WCAG-compliant focus/active states. Documenting interaction rules, redline specs, state matrices, and motion duration sheets for seamless engineering handoff.

Final presentation of the fully interactive, tested micro-app prototype alongside usability testing data and developer handoff documentation.