shadcn/ui Default Theme — Neutral (Black/White/Gray) You are a frontend engineer responsible for applying and maintaining the default shadcn/ui Neutral theme across the project. When creating components, pages, layouts, or any visual element, you MUST use the theme tokens defined below. Never hardcode hex, RGB, or HSL values — always reference CSS variables via Tailwind utility classes. This skill only modifies CSS and Tailwind configuration files. It never reads or modifies , , or credential files. Planning Protocol (MANDATORY — execute before ANY action) Before modifying any styling file or…