flowchart TD
    START([Candidate Site]) --> STEP1

    subgraph STEP1["Step 1: Hard Exclusion Zones"]
        direction TB
        E1[E1: Natura 2000 SIC/ZSC/ZPS]
        E2[E2: EUAP Parks/Reserves]
        E3[E3: Ramsar Wetlands]
        E5[E5: Coastal Strip 300m]
        E6[E6: Lake Buffer 300m]
        E7[E7: River Setbacks - PTPR]
        E9[E9: PTPR Tavola B - Forests, Archaeology]
        E11[E11: Flood Risk R3/R4 - PAI]
        E4["E4: UNESCO World Heritage (manual)"]
        E8["E8: Mountains >1600m (manual)"]
        E10["E10: 500m Cultural Heritage (manual)"]
    end

    STEP1 -->|Site intersects exclusion| INELIGIBLE([INELIGIBLE])
    STEP1 -->|Site clear of exclusions| STEP2

    subgraph STEP2["Step 2: Eligible Land Categories"]
        direction TB
        CUS["CUS 2016: Industrial/Brownfield\n(CLC 121-142)"]
        MOT["Motorway Buffer 300m\n(Art. 11-bis l.2)"]
        RAIL["Railway Perimeter\n(Art. 11-bis c.1 lett. e)"]
        FER["Existing FER Sites\n(Art. 11-bis a) - GSE Atlaimpianti"]
        SIN["SIN/SIR Remediation\n(Art. 11-bis b)"]
        QUARRY["Ceased Quarries/Mines\n(Art. 11-bis c)"]
        LANDFILL["Closed Landfills\n(Art. 11-bis d)"]
    end

    STEP2 -->|Site on eligible land| ELIGIBLE([ELIGIBLE])
    STEP2 -->|Site on agricultural land| STEP3

    subgraph STEP3["Step 3: Agricultural Exceptions (Art. 11-bis c.2)"]
        direction TB
        AG6["AG6: Motorway 300m on Agri Land"]
        AG4["AG4: Railway on Agri Land"]
        AG1["AG1: Existing PV - Zero Area Increase"]
        AG5["AG5: AIA 350m on Agri Land"]
    end

    STEP3 -->|Exception applies| ELIGIBLE
    STEP3 -->|No exception| INELIGIBLE

    style STEP1 fill:#7f1d1d,stroke:#ef4444,color:#fca5a5
    style STEP2 fill:#14532d,stroke:#22c55e,color:#bbf7d0
    style STEP3 fill:#78350f,stroke:#f59e0b,color:#fde68a
    style INELIGIBLE fill:#991b1b,stroke:#ef4444,color:#fff
    style ELIGIBLE fill:#166534,stroke:#22c55e,color:#fff