graph TB
    subgraph Clients ["Client Layer (Bilingual RTL/LTR)"]
        PWA["Next.js 16 / React 19 PWAs (elitk.com, ops.bagbacktech.com)"]
        Mobile["Android Ops App (Kotlin / Jetpack Compose)"]
        WebGL["3D WebGL Canvas (Three.js / MediaPipe Vision AI)"]
        Commerce["Multi-Vendor Storefront (bagback.shop / Cyber Bento)"]
    end

    subgraph Edge ["Edge & Reverse Proxy Routing"]
        Proxy["Caddy 2 Edge Reverse Proxy / Automated ACME TLS"]
        Gateway["Express API Gateway & JWT Session Validator"]
        Cloudflare["Cloudflare CDN & DDoS Shielding (<45ms TTFB)"]
    end

    subgraph Microservices ["Microservices & AI Compute Layer"]
        API["ELITK Marketing API (Express 5 + SSE Streaming)"]
        FastAPI["AI Workspace Backend (Python 3.12 + Cloud Run)"]
        Laravel["BAGBACK Multi-Vendor Core (Laravel 9 + Sanctum)"]
        Mail["Webmail Worker (IMAPFlow + Mailparser + Gemini)"]
    end

    subgraph Persistence ["Persistence & Cache Layer (ACID)"]
        Postgres[("PostgreSQL 16 (Drizzle ORM)")]
        Maria[("MariaDB / MySQL 8 (Commission Ledger)")]
        Redis[("Redis 7.2 (Pub/Sub & Task Queues)")]
        SQLite[("Better-SQLite3 (Local Admin CMS)")]
    end

    Clients --> Cloudflare
    Cloudflare --> Proxy
    Proxy --> Gateway
    Gateway --> API
    Gateway --> FastAPI
    Gateway --> Laravel
    Gateway --> Mail
    API --> Postgres
    API --> Redis
    FastAPI --> Postgres
    Laravel --> Maria
    Laravel --> Redis
    Mail --> SQLite