diff --git a/apps/editor/components/editor/index.tsx b/apps/editor/components/editor/index.tsx
index 633b2b70..49b90abd 100644
--- a/apps/editor/components/editor/index.tsx
+++ b/apps/editor/components/editor/index.tsx
@@ -37,7 +37,7 @@ export default function Editor() {
       <SidebarProvider className="fixed z-10">
         <AppSidebar />
       </SidebarProvider>
-      <Viewer>
+      <Viewer selectionManager="custom">
         <SelectionManager />
         <ExportManager />
         {/* Editor only system to toggle zone visibility */}
diff --git a/packages/core/src/events/bus.ts b/packages/core/src/events/bus.ts
index df5cbb40..79590943 100644
--- a/packages/core/src/events/bus.ts
+++ b/packages/core/src/events/bus.ts
@@ -1,6 +1,6 @@
 import type { ThreeEvent } from '@react-three/fiber'
 import mitt from 'mitt'
-import type { BuildingNode, CeilingNode, ItemNode, RoofNode, SlabNode, WallNode, ZoneNode } from '../schema'
+import type { BuildingNode, CeilingNode, ItemNode, LevelNode, RoofNode, SlabNode, WallNode, ZoneNode } from '../schema'
 import type { AnyNode } from '../schema/types'
 
 // Base event interfaces
@@ -21,6 +21,7 @@ export interface NodeEvent<T extends AnyNode = AnyNode> {
 export type WallEvent = NodeEvent<WallNode>
 export type ItemEvent = NodeEvent<ItemNode>
 export type BuildingEvent = NodeEvent<BuildingNode>
+export type LevelEvent = NodeEvent<LevelNode>
 export type ZoneEvent = NodeEvent<ZoneNode>
 export type SlabEvent = NodeEvent<SlabNode>
 export type CeilingEvent = NodeEvent<CeilingNode>
@@ -61,6 +62,7 @@ type EditorEvents = GridEvents &
   NodeEvents<'wall', WallEvent> &
   NodeEvents<'item', ItemEvent> &
   NodeEvents<'building', BuildingEvent> &
+  NodeEvents<'level', LevelEvent> &
   NodeEvents<'zone', ZoneEvent> &
   NodeEvents<'slab', SlabEvent> &
   NodeEvents<'ceiling', CeilingEvent> &
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 3187a00d..7f58d8a5 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -6,6 +6,7 @@ export type {
   EventSuffix,
   GridEvent,
   ItemEvent,
+  LevelEvent,
   NodeEvent,
   SlabEvent,
   WallEvent,
diff --git a/packages/viewer/src/components/renderers/level/level-renderer.tsx b/packages/viewer/src/components/renderers/level/level-renderer.tsx
index 0ee20ed9..b81e9c80 100644
--- a/packages/viewer/src/components/renderers/level/level-renderer.tsx
+++ b/packages/viewer/src/components/renderers/level/level-renderer.tsx
@@ -1,19 +1,17 @@
 import { type LevelNode, useRegistry } from '@pascal-app/core'
 import { useRef } from 'react'
 import type { Group } from 'three'
+import { useNodeEvents } from '../../../hooks/use-node-events'
 import { NodeRenderer } from '../node-renderer'
 
 export const LevelRenderer = ({ node }: { node: LevelNode }) => {
   const ref = useRef<Group>(null!)
 
   useRegistry(node.id, node.type, ref)
+  const handlers = useNodeEvents(node, 'level')
 
   return (
-    <group ref={ref}>
-      {/* <mesh receiveShadow>
-        <boxGeometry args={[10, 0.1, 10]} />
-        <meshStandardMaterial color="orange" />
-      </mesh> */}
+    <group ref={ref} {...handlers}>
       {node.children.map((childId) => (
         <NodeRenderer key={childId} nodeId={childId} />
       ))}
diff --git a/packages/viewer/src/components/viewer/index.tsx b/packages/viewer/src/components/viewer/index.tsx
index a1617836..09954fb8 100644
--- a/packages/viewer/src/components/viewer/index.tsx
+++ b/packages/viewer/src/components/viewer/index.tsx
@@ -9,6 +9,7 @@ import { LevelSystem } from '../../systems/level/level-system'
 import { ScanSystem } from '../../systems/scan/scan-system'
 import { SceneRenderer } from '../renderers/scene-renderer'
 import PostProcessing from './post-processing'
+import { SelectionManager } from './selection-manager'
 import { ViewerCamera } from './viewer-camera'
 
 declare module '@react-three/fiber' {
@@ -19,9 +20,10 @@ extend(THREE as any)
 
 interface ViewerProps {
   children?: React.ReactNode
+  selectionManager?: 'default' | 'custom'
 }
 
-const Viewer: React.FC<ViewerProps> = ({ children }) => {
+const Viewer: React.FC<ViewerProps> = ({ children, selectionManager = 'default' }) => {
   return (
     <Canvas
       className={'bg-[#303035]'}
@@ -54,6 +56,7 @@ const Viewer: React.FC<ViewerProps> = ({ children }) => {
       <WallSystem />
       <PostProcessing />
 
+      {selectionManager === 'default' && <SelectionManager />}
       {children}
     </Canvas>
   )
diff --git a/packages/viewer/src/components/viewer/selection-manager.tsx b/packages/viewer/src/components/viewer/selection-manager.tsx
new file mode 100644
index 00000000..c820bc9d
--- /dev/null
+++ b/packages/viewer/src/components/viewer/selection-manager.tsx
@@ -0,0 +1,186 @@
+'use client'
+
+import {
+  type BuildingNode,
+  type LevelNode,
+  type NodeEvent,
+  emitter,
+  sceneRegistry,
+} from '@pascal-app/core'
+import { useEffect } from 'react'
+import useViewer from '../../store/use-viewer'
+
+export const SelectionManager = () => {
+  const selection = useViewer((s) => s.selection)
+
+  useEffect(() => {
+    const { buildingId, levelId, zoneId } = selection
+
+    // Determine current selection depth and what can be clicked
+    // 0: no building → can click buildings
+    // 1: building selected → can click levels
+    // 2: level selected → can click/hover zones
+    // 3: zone selected → can hover items/walls (no click needed)
+
+    const onBuildingClick = (event: NodeEvent<BuildingNode>) => {
+      if (buildingId) return // Already have a building selected
+      event.stopPropagation()
+      useViewer.getState().setSelection({ buildingId: event.node.id })
+    }
+
+    const onBuildingEnter = (event: NodeEvent<BuildingNode>) => {
+      if (buildingId) return
+      event.stopPropagation()
+      useViewer.setState({ hoveredId: event.node.id })
+    }
+
+    const onBuildingLeave = (event: NodeEvent<BuildingNode>) => {
+      if (buildingId) return
+      event.stopPropagation()
+      useViewer.setState({ hoveredId: null })
+    }
+
+    const onLevelClick = (event: NodeEvent<LevelNode>) => {
+      if (!buildingId || levelId) return // Need building, but no level yet
+      event.stopPropagation()
+      useViewer.getState().setSelection({ levelId: event.node.id })
+    }
+
+    const onLevelEnter = (event: NodeEvent<LevelNode>) => {
+      if (!buildingId || levelId) return
+      event.stopPropagation()
+      useViewer.setState({ hoveredId: event.node.id })
+    }
+
+    const onLevelLeave = (event: NodeEvent<LevelNode>) => {
+      if (!buildingId || levelId) return
+      event.stopPropagation()
+      useViewer.setState({ hoveredId: null })
+    }
+
+    const onZoneClick = (event: NodeEvent) => {
+      if (!levelId || zoneId) return // Need level, but no zone yet
+      event.stopPropagation()
+      useViewer.getState().setSelection({ zoneId: event.node.id })
+    }
+
+    const onZoneEnter = (event: NodeEvent) => {
+      if (!levelId) return
+      event.stopPropagation()
+      useViewer.setState({ hoveredId: event.node.id })
+    }
+
+    const onZoneLeave = (event: NodeEvent) => {
+      if (!levelId) return
+      event.stopPropagation()
+      useViewer.setState({ hoveredId: null })
+    }
+
+    // Hover for items/walls when zone is selected
+    const onItemEnter = (event: NodeEvent) => {
+      if (!zoneId) return
+      event.stopPropagation()
+      useViewer.setState({ hoveredId: event.node.id })
+    }
+
+    const onItemLeave = (event: NodeEvent) => {
+      if (!zoneId) return
+      event.stopPropagation()
+      useViewer.setState({ hoveredId: null })
+    }
+
+    // Grid click deselects in reverse order
+    const onGridClick = () => {
+      const { buildingId, levelId, zoneId, selectedIds } = useViewer.getState().selection
+
+      if (selectedIds.length > 0) {
+        useViewer.getState().setSelection({ selectedIds: [] })
+      } else if (zoneId) {
+        useViewer.getState().setSelection({ zoneId: null })
+      } else if (levelId) {
+        useViewer.getState().setSelection({ levelId: null })
+      } else if (buildingId) {
+        useViewer.getState().setSelection({ buildingId: null })
+      }
+    }
+
+    // Subscribe to events
+    emitter.on('building:click', onBuildingClick)
+    emitter.on('building:enter', onBuildingEnter)
+    emitter.on('building:leave', onBuildingLeave)
+
+    emitter.on('level:click', onLevelClick)
+    emitter.on('level:enter', onLevelEnter)
+    emitter.on('level:leave', onLevelLeave)
+
+    emitter.on('zone:click', onZoneClick)
+    emitter.on('zone:enter', onZoneEnter)
+    emitter.on('zone:leave', onZoneLeave)
+
+    emitter.on('item:enter', onItemEnter)
+    emitter.on('item:leave', onItemLeave)
+    emitter.on('wall:enter', onItemEnter)
+    emitter.on('wall:leave', onItemLeave)
+
+    emitter.on('grid:click', onGridClick)
+
+    return () => {
+      emitter.off('building:click', onBuildingClick)
+      emitter.off('building:enter', onBuildingEnter)
+      emitter.off('building:leave', onBuildingLeave)
+
+      emitter.off('level:click', onLevelClick)
+      emitter.off('level:enter', onLevelEnter)
+      emitter.off('level:leave', onLevelLeave)
+
+      emitter.off('zone:click', onZoneClick)
+      emitter.off('zone:enter', onZoneEnter)
+      emitter.off('zone:leave', onZoneLeave)
+
+      emitter.off('item:enter', onItemEnter)
+      emitter.off('item:leave', onItemLeave)
+      emitter.off('wall:enter', onItemEnter)
+      emitter.off('wall:leave', onItemLeave)
+
+      emitter.off('grid:click', onGridClick)
+    }
+  }, [selection])
+
+  return <OutlinerSync />
+}
+
+const OutlinerSync = () => {
+  const selection = useViewer((s) => s.selection)
+  const hoveredId = useViewer((s) => s.hoveredId)
+  const outliner = useViewer((s) => s.outliner)
+
+  useEffect(() => {
+    let idsToHighlight: string[] = []
+
+    // Highlight based on the "deepest" selection
+    if (selection.selectedIds.length > 0) {
+      idsToHighlight = selection.selectedIds
+    } else if (selection.zoneId) {
+      idsToHighlight = [selection.zoneId]
+    } else if (selection.levelId) {
+      idsToHighlight = [selection.levelId]
+    } else if (selection.buildingId) {
+      idsToHighlight = [selection.buildingId]
+    }
+
+    // Sync with the imperative outliner arrays
+    outliner.selectedObjects.length = 0
+    for (const id of idsToHighlight) {
+      const obj = sceneRegistry.nodes.get(id)
+      if (obj) outliner.selectedObjects.push(obj)
+    }
+
+    outliner.hoveredObjects.length = 0
+    if (hoveredId) {
+      const obj = sceneRegistry.nodes.get(hoveredId)
+      if (obj) outliner.hoveredObjects.push(obj)
+    }
+  }, [selection, hoveredId, outliner])
+
+  return null
+}
diff --git a/packages/viewer/src/hooks/use-node-events.ts b/packages/viewer/src/hooks/use-node-events.ts
index 36e33893..64042113 100644
--- a/packages/viewer/src/hooks/use-node-events.ts
+++ b/packages/viewer/src/hooks/use-node-events.ts
@@ -7,6 +7,8 @@ import {
   emitter,
   type ItemEvent,
   type ItemNode,
+  type LevelEvent,
+  type LevelNode,
   type RoofEvent,
   type RoofNode,
   type SlabEvent,
@@ -22,6 +24,7 @@ type NodeConfig = {
   item: { node: ItemNode; event: ItemEvent }
   wall: { node: WallNode; event: WallEvent }
   building: { node: BuildingNode; event: BuildingEvent }
+  level: { node: LevelNode; event: LevelEvent }
   zone: { node: ZoneNode; event: ZoneEvent }
   slab: { node: SlabNode; event: SlabEvent }
   ceiling: { node: CeilingNode; event: CeilingEvent }