Write a design token system documentation in a {{tone}} tone for {{target_audience}} in the {{industry}} industry, implemented using {{platform}} and designed in Figma. The goal is to improve customer retention by ensuring UI consistency and reducing cognitive load. Output must follow DTCG format with BEM-like naming. Cover: token architecture philosophy (multi-tier strategy, naming convention, theme support), global primitives (color ramps with 12 steps per hue, spacing scale based on 4px unit, typography, borders, shadows, motion), semantic alias tokens mapping primitives to meaningful names, component tokens for Button, Input field, and Card, theme definitions for light and dark with mapping rules, and an implementation guide covering file formats, build pipeline, Figma syncing, and versioning. Maximum 1500 words. Paste any relevant background information after these instructions before running.