# Kalei — Claude Code Implementation Instructions > **Purpose:** This document tells Claude Code everything it needs to know to build pixel-perfect, interactive HTML mockups for every screen in the Kalei app. > > **Read this file first, then follow the build order at the bottom.** --- ## 1. What You're Building You are building **64 interactive HTML mockup screens** for Kalei, a mobile mental wellness app. Each screen is a standalone `.html` file that: - Renders at **390 × 844px** (iPhone 14 viewport) inside a rounded device frame - Uses the shared `design-system.css` for all tokens, typography, components, and layout - References SVG assets from the `assets/` folder for icons, patterns, decorations, and visualizations - Includes micro-interactions and state transitions using CSS animations + minimal vanilla JS - Can be viewed in any browser by opening the file directly (no build step, no server) **Output format:** Single-file HTML per screen. All CSS beyond `design-system.css` goes in a `