What problem does it solve? Frontend work across Laravel and OpenCart projects often suffers from inconsistent technology choices and missed mobile layout issues. This Skill standardizes decisions about Tailwind versions, Alpine.js versus jQuery, CSS patterns, and responsive verification so UI work stays consistent with each project's existing stack. ## Core Features & Use Cases - Tailwind Guidance: Detects the configured Tailwind version (v3 config file or v4 CSS-based config) before writing utility classes, and prefers the latest stable version for new setups. - JavaScript Framework Selection: Directs Alpine.js for Laravel/Livewire interactivity while accepting jQuery in legacy OpenCart projects that already ship with it. - Responsive & Dark Mode Verification: Requires proactive small-viewport checks (~390px via Playwright or similar) and dual light/dark theme validation on any UI work. - Use Case: When building a new modal component in a Laravel project, the Skill ensures Alpine.js is used instead of jQuery, classes follow a readable grouping, and the layout is verified at mobile width in both themes. ## Quick Start Review this new checkout form component against the frontend-stack conventions and verify it works at a 390px viewport in both light and dark mode.