diff --git a/Assets/_Project/Scripts/Gameplay/TowerPlacementController.cs b/Assets/_Project/Scripts/Gameplay/TowerPlacementController.cs
index 3b71743..9b1db7c 100644
--- a/Assets/_Project/Scripts/Gameplay/TowerPlacementController.cs
+++ b/Assets/_Project/Scripts/Gameplay/TowerPlacementController.cs
@@ -55,7 +55,7 @@ namespace TD.Gameplay
         // ----- Active-placement state -------------------------------------
 
         // Null when placement mode is inactive.
-        private TowerDefinition activeDef;
+        private TowerDefinition activeTowerDefinition;
         private int activeTowerTypeId;
 
         // Set true by a single-shot placement submit; processed at the top of the next
@@ -112,7 +112,7 @@ namespace TD.Gameplay
                 return;
             }
 
-            if (activeDef == null) return;     // idle — nothing to do
+            if (activeTowerDefinition == null) return;     // idle — nothing to do
 
             var mouse = Mouse.current;
             if (mouse == null) return;         // no mouse device connected
@@ -137,10 +137,10 @@ namespace TD.Gameplay
             SetGhostVisible(true);
 
             // Compute the footprint anchor from the hit point.
-            Vector2Int anchor = ComputeAnchor(hitPoint, activeDef.FootprintSize);
+            Vector2Int anchor = ComputeAnchor(hitPoint, activeTowerDefinition.FootprintSize);
 
             // Position the cursor ghost at the footprint center.
-            Vector3 ghostPos = GridCoordinates.GetFootprintCenterWorld(anchor, activeDef.FootprintSize);
+            Vector3 ghostPos = GridCoordinates.GetFootprintCenterWorld(anchor, activeTowerDefinition.FootprintSize);
             ghostPos.y = 0.5f; // lift off the plane so the cube base sits flush
             ghostGO.transform.position = ghostPos;
 
@@ -150,7 +150,7 @@ namespace TD.Gameplay
             {
                 lastAnchor = anchor;
                 lastAnchorValid = true;
-                lastPlacementValid = EvaluateLocalValidity(anchor, activeDef);
+                lastPlacementValid = EvaluateLocalValidity(anchor, activeTowerDefinition);
             }
 
             // Update ghost color.
@@ -182,7 +182,7 @@ namespace TD.Gameplay
             // Cancel any existing placement before starting a new one.
             ExitPlacementMode();
 
-            activeDef = def;
+            activeTowerDefinition = def;
             activeTowerTypeId = towerTypeId;
 
             CreateGhost(def);
@@ -193,7 +193,7 @@ namespace TD.Gameplay
         /// </summary>
         void ExitPlacementMode()
         {
-            activeDef = null;
+            activeTowerDefinition = null;
             activeTowerTypeId = 0;
             lastAnchorValid = false;
 
@@ -203,7 +203,7 @@ namespace TD.Gameplay
         /// <summary>
         /// True when placement mode is currently active.
         /// </summary>
-        public bool IsPlacing => activeDef != null;
+        public bool IsPlacing => activeTowerDefinition != null;
 
         // ----- Modifier helpers -------------------------------------------