diff --git a/package.json b/package.json
index 55cfe58..a63fcac 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "photo-renamer",
   "version": "2.0.0",
   "description": "사진 파일 이름 정리 앱",
-  "main": "src/main.js",
+  "main": "src/main/index.js",
   "scripts": {
     "start": "electron .",
     "build": "electron-builder --mac --dir",
diff --git a/src/main.js b/src/main/index.js
similarity index 92%
rename from src/main.js
rename to src/main/index.js
index 08f1f6b..54d7036 100644
--- a/src/main.js
+++ b/src/main/index.js
@@ -20,7 +20,7 @@ function createWindow() {
     show: false,
   });
 
-  mainWindow.loadFile(path.join(__dirname, 'index.html'));
+  mainWindow.loadFile(path.join(__dirname, '../renderer/index.html'));
 
   mainWindow.once('ready-to-show', () => {
     mainWindow.show();
diff --git a/src/ipc/files.js b/src/main/ipc/files.js
similarity index 100%
rename from src/ipc/files.js
rename to src/main/ipc/files.js
diff --git a/src/ipc/folder.js b/src/main/ipc/folder.js
similarity index 100%
rename from src/ipc/folder.js
rename to src/main/ipc/folder.js
diff --git a/src/ipc/index.js b/src/main/ipc/index.js
similarity index 100%
rename from src/ipc/index.js
rename to src/main/ipc/index.js
diff --git a/src/preload.js b/src/main/preload.js
similarity index 100%
rename from src/preload.js
rename to src/main/preload.js
diff --git a/src/handlers/dragDrop.js b/src/renderer/handlers/drag-drop.js
similarity index 100%
rename from src/handlers/dragDrop.js
rename to src/renderer/handlers/drag-drop.js
diff --git a/src/handlers/pinchZoom.js b/src/renderer/handlers/pinch-zoom.js
similarity index 100%
rename from src/handlers/pinchZoom.js
rename to src/renderer/handlers/pinch-zoom.js
diff --git a/src/handlers/selection.js b/src/renderer/handlers/selection.js
similarity index 100%
rename from src/handlers/selection.js
rename to src/renderer/handlers/selection.js
diff --git a/src/index.html b/src/renderer/index.html
similarity index 100%
rename from src/index.html
rename to src/renderer/index.html
diff --git a/src/renderer.js b/src/renderer/renderer.js
similarity index 98%
rename from src/renderer.js
rename to src/renderer/renderer.js
index faaae73..ac96e02 100644
--- a/src/renderer.js
+++ b/src/renderer/renderer.js
@@ -1,7 +1,7 @@
 import { state }     from './state.js';
-import * as pinchZoom from './handlers/pinchZoom.js';
+import * as pinchZoom from './handlers/pinch-zoom.js';
 import * as selection  from './handlers/selection.js';
-import * as dragDrop   from './handlers/dragDrop.js';
+import * as dragDrop   from './handlers/drag-drop.js';
 
 // ── DOM ──────────────────────────────────────────────
 const grid          = document.getElementById('grid');
diff --git a/src/state.js b/src/renderer/state.js
similarity index 100%
rename from src/state.js
rename to src/renderer/state.js
diff --git a/src/style.css b/src/renderer/style.css
similarity index 100%
rename from src/style.css
rename to src/renderer/style.css