What problem does it solve? Building card-based interfaces often leads to inconsistent spacing, broken responsive behavior, missing hover/focus states, and accessibility failures. This Skill provides concrete layout patterns, spacing rules, and WCAG guidance so card grids, bento layouts, and media cards render correctly across viewports. ## Core Features & Use Cases - Layout Patterns: Covers card grids with auto-fill/auto-fit columns, bento grids with col-span/row-span mosaics, horizontal scroll-snap rails, and media cards with fixed aspect ratios. - Responsive & Spacing Rules: Enforces mobile-first breakpoints (1 to 4 columns), 4px/8px spacing grids, consistent gutters, and max card widths for readability. - Interaction & Accessibility: Defines default, hover, focus, and active states plus WCAG 2.2 AA contrast, keyboard focus, and prefers-reduced-motion support. - Use Case: When building a pricing page or dashboard, ask for a responsive card grid and receive guidance on grid-template-columns, gap values, hover lift effects, and focus rings that pass accessibility audits. ## Quick Start Ask the assistant to design a responsive three-column pricing card grid with hover lift effects and keyboard-accessible focus states.