flowchart TB
    subgraph Foundation["Foundation"]
        EC["1. Execution Context"] --> CS["2. Call Stack"]
        CS --> Hoisting["3. Hoisting"]
        Hoisting --> FVE["4. Functions & Variable Env"]
        FVE --> Window["5. window & this"]
        Window --> Undef["6. undefined vs not defined"]
    end

    subgraph Scoping["Scoping & Closures"]
        Scope["7. Scope Chain & Lexical Env"] --> TDZ["8. let/const & TDZ"]
        TDZ --> Block["9. Block Scope & Shadowing"]
        Block --> Closures["10. Closures"]
        Closures --> SetTime["11. setTimeout + Closures"]
        SetTime --> Interview["12. Interview Questions ft. Closures"]
    end

    subgraph Functions["Functions & Async"]
        FCF["13. First Class Functions"] --> CB["14. Callback Functions"]
        CB --> EventLoop["15. Event Loop"] --> V8["16. V8 Architecture"]
        V8 --> Trust["17. Trust issues with setTimeout"]
        Trust --> HOF["18. Higher-Order Functions"]
        HOF --> MFR["19. map, filter & reduce"]
    end

    subgraph Season2["Season 2 - Promises & Async"]
        CHell["20. Callback Hell & IoC"] --> Prom["21. Promises"]
        Prom --> CreateP["22. Creating a Promise & Chaining"]
        CreateP --> PAPI["23. Promise APIs"]
        PAPI --> AsyncAwait["24. async / await"]
        AsyncAwait --> ThisKw["25. this keyword"]
    end

    Foundation --> Scoping --> Functions --> Season2

    style Foundation fill:#7c3aed,color:#fff
    style Scoping fill:#4f46e5,color:#fff
    style Functions fill:#059669,color:#fff
    style Season2 fill:#b45309,color:#fff