mermaid
stateDiagram-v2
    classDef normal fill:#fff,stroke:#333,stroke-width:2px
    classDef selected fill:#f9f,stroke:#f66,stroke-width:2px
    classDef caution fill:#ff9,stroke:#f66,stroke-width:2px
    classDef warning fill:#f99,stroke:#f00,stroke-width:2px

    [*] --> Normal
    Normal --> Autopilot : Engage Autopilot
    Autopilot --> Normal : Disengage Autopilot

    Normal --> FlightControls : Adjust Flight Controls
    FlightControls --> Normal : Flight Controls Set

    Normal --> LandingGear : Lower Landing Gear
    LandingGear --> Normal : Landing Gear Down

    Normal --> Lights : Toggle Lights
    Lights --> Normal : Lights On

    Normal --> Emergency : Activate Emergency Procedures
    Emergency --> Normal : Emergency Resolved

    Normal --> Selected : Select Flight Controls
    Selected --> Normal : Flight Controls Selected

    Normal --> Caution : Caution Alert
    Caution --> Normal : Caution Acknowledged

    Normal --> Warning : Warning Alert
    Warning --> Normal : Warning Acknowledged