ODT UI for Ruby on Rails brings the ODT Design System directly into Rails applications with a Standalone CSS First architecture. Key Features: * Standalone CSS First: Ships pre-compiled design tokens and component styles with zero host build tools required (compatible with Propshaft, Sprockets, or no asset pipeline). * Seamless Tailwind CSS v4 Interop: Full @theme preset configuration allowing custom utility classes to merge cleanly. * Hotwire & Turbo Ready: Out-of-the-box ActionView helpers for Flash Toasts, Turbo Stream notifications, and Stimulus-powered Modals. * Complete Component Set: Buttons, Badges, Cards, Alerts, Toasts, Modals, Headings, Text, Avatars, Inputs, Selects, Checkboxes, Radios, and Form Groups. * Type Checked: Full RBS type signatures included for Ruby LSP and Solargraph autocompletion.