web-layout-spacing

Proper layout and spacing in modern web design — 8px grid systems, modular scales, vertical rhythm, CSS Grid/Flexbox patterns, fluid spacing with clamp(), container queries, and whitespace as design element. Activate on 'spacing', 'layout spacing', 'grid system', 'whitespace', '8px grid', 'vertical rhythm', 'spacing scale', 'gap', 'padding ratio', 'layout primitives', 'responsive spacing', 'clamp spacing', 'container queries layout'. NOT for animation/motion (use motion-design-web), not for color/typography alone (use typography-expert), not for design system creation (use design-system-bootstrap).