Flexi Diagram Tuner Edition

flowchart TD
  %% ========================================
  %% GraphPro Feature Showcase
  %% ========================================

  %% Start/End terminals (rounded)
  Start([Start Process]) --> Input[/User Input/]
  
  %% Subgraph: Data Processing
  subgraph DataProcessing[Data Processing Pipeline]
      Input --> Validate{Valid?}
      Validate -->|Yes| Transform[Transform Data]
      Validate -->|No| ErrorHandle[Handle Error]
      ErrorHandle --> Retry{Retry?}
      Retry -->|Yes| Input
      Retry -->|No| Abort([Abort])
  end

  %% Subgraph: Business Logic
  subgraph BusinessLogic[Business Logic Layer]
      Transform --> Calculate[[Calculate Metrics]]
      Calculate --> Decision{Route?}
      Decision -->|Path A| ProcessA[Process A<br/>Standard Flow]
      Decision -->|Path B| ProcessB[Process B<br/>Priority Flow]
      Decision -->|Path C| ProcessC[(Database<br/>Storage)]
  end

  %% Subgraph: Output Handling
  subgraph OutputLayer[Output & Notifications]
      ProcessA --> Merge[Merge Results]
      ProcessB --> Merge
      ProcessC --> Merge
      Merge --> Format[/Format Output/]
      Format --> Notify{Notify?}
      Notify -->|Email| Email[Send Email]
      Notify -->|SMS| SMS[Send SMS]
      Notify -->|None| Skip[Skip Notification]
  end

  %% Final convergence
  Email --> Complete([Complete])
  SMS --> Complete
  Skip --> Complete

  %% Custom styles for different node types
  classDef terminal fill:#d4edda,stroke:#28a745,stroke-width:2px
  classDef process fill:#e7f1ff,stroke:#4a90d9,stroke-width:2px
  classDef decision fill:#fff3cd,stroke:#ffc107,stroke-width:2px
  classDef database fill:#f8d7da,stroke:#dc3545,stroke-width:2px
  classDef io fill:#e2d5f1,stroke:#9b59b6,stroke-width:2px

  class Start,Complete,Abort terminal
  class Transform,Calculate,ProcessA,ProcessB,Merge,ErrorHandle process
  class Validate,Decision,Retry,Notify decision
  class ProcessC database
  class Input,Format io