What problem does it solve? Frontend code drifts from the approved prototype when developers hardcode colors, fonts, and spacing values. This Skill provides a single source of truth for the StapleTech AI Marketing Platform's visual design system, extracted from the prototype, so every component matches the intended warm dark theme with terracotta accents. ## Core Features & Use Cases - Design Token Enforcement: Defines CSS custom properties and Tailwind config mappings for colors, typography (Instrument Serif + DM Sans), border radius, shadows, and animation keyframes, banning hardcoded hex values in .tsx files. - Component Patterns: Specifies five canonical patterns (hoverable cards, status badges, overline labels, progress bars, type icons) with exact class strings and semantic color mappings. - Layout & Accessibility Rules: Fixes the three-panel workspace layout widths (64px/220px/320px) and enforces WCAG AA contrast, focus rings, reduced-motion support, and aria-labels. - Use Case: When building a new campaign dashboard page, apply the token system, StatusBadge color mappings, and fixed panel widths so the ui-reviewer subagent passes the code without violations. ## Quick Start Apply the frontend-design skill to build a new campaign card component that follows the StapleTech design tokens and component patterns.