Fuji Admin is a drop-in theme for ActiveAdmin that upgrades every default surface — tables, forms, filters, panels, pagination, scopes, batch actions — into a cohesive, modern design system without requiring any changes to your app/admin files. Ships with a card-based responsive layout, slide-in filter drawer with active-filter chips, animated floating labels on text inputs and textareas, row-action dropdowns, and a runtime palette switcher with 30 built-in palettes (8 curated full themes) that repaint surfaces, text, borders, and primary accents live. Mobile posture is first-class: panels flatten into sections, index tables get compact padding with opt-in column wrapping, and wide tables scroll horizontally. Every design token (color, shadow, radius, space, font) is an overridable SCSS variable so brands can customize without forking.