diff --git a/README.md b/README.md
index 4c35c16..8d2858a 100644
--- a/README.md
+++ b/README.md
@@ -16,14 +16,14 @@
 ## Tech Stack
 
 - [Jetpack](https://developer.android.com/jetpack)
-    - Compose - Define your UI programmatically with composable functions that describe its shape
-      and data dependencies.
-    - Hilt - Extend the functionality of Dagger Hilt to enable dependency injection.
-    - Lifecycle - Build lifecycle-aware components that can adjust behavior based on the current
-      lifecycle state
-    - Room - Create, store, and manage persistent data backed by a SQLite database.
-    - ViewModel - Store and manage UI-related data in a lifecycle conscious.
-    - App Startup - initialize components at app startup.
+  - Compose - Define your UI programmatically with composable functions that describe its shape
+    and data dependencies.
+  - Hilt - Extend the functionality of Dagger Hilt to enable dependency injection.
+  - Lifecycle - Build lifecycle-aware components that can adjust behavior based on the current
+    lifecycle state
+  - Room - Create, store, and manage persistent data backed by a SQLite database.
+  - ViewModel - Store and manage UI-related data in a lifecycle conscious.
+  - App Startup - initialize components at app startup.
 - Clean Architecture (multi module)
 - MVVM pattern
 - Kotlin
@@ -65,5 +65,26 @@
     └── setting
 ```
 
-## Module Graphs
+The file structure is similar to Now in Android, but to follow Clean Architecture, the domain layer
+does not reference the data layer.
+
+## Nested NavHosts
+
+```mermaid
+graph TD
+    A[Main NavHost] --> B[BottomBar]
+    A --> C[Detail]
+    B --> D[Bottom NavHost]
+    D --> E[List]
+    D --> F[Favorite]
+    D --> G[Setting]
+```
+
+Even though using nested NavHosts makes things more complex, this approach was chosen to achieve screen transition animations similar to those between Activities.
+
+(One NavHost needs to manage how to hide the bottom navigation and apply animations during screen transitions.)
+
+# Module Graphs
+
 ![](project.dot.png)
+