css-layout-debugger

Use when a user reports CSS, layout, or styling issues in a Next.js application — "element overlapping," "spacing is wrong," "responsive layout broken," "dark mode not working," "Tailwind classes not applying," or "alignment off." Diagnoses through a 6-phase pipeline that mirrors browser evaluation order, covering token resolution, cascade conflicts, layout models, stacking contexts, and viewport responsiveness. Handles Tailwind, CSS Modules, styled-components, and vanilla CSS. Not for JavaScript logic bugs, data fetching issues, or server-side rendering errors — route those to ui-bug-investigator.