graph LR
                            %% External Access & Security
                            User([External Access])
                            CF[Cloudflare Tunnel & Zero Trust]
                            TS[Tailscale Subnet Router & Mesh VPN]

                            %% Core Server Stack
                            subgraph Core Server Stack [Docker Environment]
                                HA[Home Assistant]
                                NC[Nextcloud - Local Backup]
                                Traccar[Traccar Fleet Monitoring]
                            end

                            %% AI & Vision
                            subgraph Security & Vision [AI NVR]
                                Frigate[Frigate NVR]
                                Coral[Google Coral TPU]
                                Cameras[ESP32-CAMs & IP Cameras]
                            end

                            %% Network & Brokers
                            subgraph IoT Gateway [Raspberry Pi Zero 2 W]
                                Z2M[Zigbee2MQTT]
                                MQTT[DIY MQTT Broker]
                                PiHole[Pi-hole Ad Blocking]
                            end

                            %% Edge Nodes & Sensors
                            subgraph Edge Devices & Sensors
                                ESP[ESP32 Room Nodes via ESPHome]
                                BLE[Bluetooth Proxies & iBeacons]
                                ZigbeeSensors[Xiaomi / Tuya / Tapo Devices]
                                RF[433MHz RF Sensors]
                            end

                            %% Connections - External to Core
                            User <-->|Secure Web| CF
                            User <-->|Direct VPN| TS
                            CF <--> HA
                            TS <--> HA
                            TS <--> NC

                            %% NVR Integration
                            Cameras -->|Video Stream| Frigate
                            Frigate <-->|AI Inference| Coral
                            Frigate -->|Occupancy/Events| HA

                            %% IoT Gateway Integration
                            Z2M -->|Payloads| MQTT
                            MQTT <-->|Telemetry| HA
                            PiHole -->|DNS Queries| HA

                            %% Edge Device Integration
                            ZigbeeSensors <-->|Zigbee Network| Z2M
                            RF -->|RF Signals| HA
                            ESP <-->|API / WiFi| HA
                            BLE -->|Presence Tracking| ESP