diff --git a/docs/contributing/contributing.md b/docs/contributing/contributing.md
index 45b8c31..7229638 100644
--- a/docs/contributing/contributing.md
+++ b/docs/contributing/contributing.md
@@ -31,5 +31,5 @@ We welcome contributions! Please see our [Development Guide](DEVELOPMENT.md) for
 
 ---
 
-**Looking for user documentation?** See the [User Portal](../user/INDEX.md)
-**Need API docs?** See the [Developer Portal](../developer/INDEX.md)
+**Looking for user documentation?** See the [User Portal](../user/user-guide.md)
+**Need API docs?** See the [Developer Portal](../developer/development.md)
diff --git a/docs/developer/api-reference.md b/docs/developer/api-reference.md
index 1024686..3309863 100644
--- a/docs/developer/api-reference.md
+++ b/docs/developer/api-reference.md
@@ -1,7 +1,7 @@
 # Bookhoard API Reference
 
 > **⚠️ Legacy Document**: This is a monolithic API reference (1,600+ lines).
-> For updated, split endpoint documentation with interactive API explorer, see [API Documentation Portal](api/INDEX.md).
+> For updated, split endpoint documentation with interactive API explorer, see [API Documentation Portal](api/api-reference.md).
 >
 > **Use the split docs for:**
 > - Easier navigation by category
diff --git a/docs/developer/development.md b/docs/developer/development.md
index b30a5df..2562071 100644
--- a/docs/developer/development.md
+++ b/docs/developer/development.md
@@ -23,7 +23,7 @@ Welcome to the Bookhoard developer documentation. This section contains API refe
 
 Browse individual endpoint documentation with interactive API Explorer:
 
-- **[API Documentation](api/INDEX.md)** - Split endpoint docs
+- **[API Documentation](api/api-reference.md)** - Split endpoint docs
   - [Authentication](api/authentication/) - Register, login, tokens
   - [Users](api/users/) - Profile management
   - [Libraries](api/libraries/) - Library operations
@@ -73,5 +73,5 @@ Browse individual endpoint documentation with interactive API Explorer:
 
 ---
 
-**Looking for user documentation?** See the [User Portal](../user/INDEX.md)
-**Need to deploy?** See the [Operations Portal](../operations/INDEX.md)
+**Looking for user documentation?** See the [User Portal](../user/user-guide.md)
+**Need to deploy?** See the [Operations Portal](../operations/operations.md)
diff --git a/docs/INDEX.md b/docs/index.md
similarity index 100%
rename from docs/INDEX.md
rename to docs/index.md
diff --git a/docs/operations/operations.md b/docs/operations/operations.md
index 36ee5fe..3d6024a 100644
--- a/docs/operations/operations.md
+++ b/docs/operations/operations.md
@@ -30,5 +30,5 @@ Welcome to the Bookhoard operations documentation. This section contains guides
 
 ---
 
-**Looking for user documentation?** See the [User Portal](../user/INDEX.md)
-**Need API docs?** See the [Developer Portal](../developer/INDEX.md)
+**Looking for user documentation?** See the [User Portal](../user/user-guide.md)
+**Need API docs?** See the [Developer Portal](../developer/development.md)
diff --git a/docs/user/user-guide.md b/docs/user/user-guide.md
index d00e5e5..0a3779f 100644
--- a/docs/user/user-guide.md
+++ b/docs/user/user-guide.md
@@ -49,4 +49,4 @@ Learn how to configure your e-reader devices to sync with Bookhoard:
 
 ---
 
-**Looking for developer documentation?** See the [Developer Portal](../developer/INDEX.md)
+**Looking for developer documentation?** See the [Developer Portal](../developer/development.md)
diff --git a/internal/docs/navigation.go b/internal/docs/navigation.go
index 3de5f3b..8d60774 100644
--- a/internal/docs/navigation.go
+++ b/internal/docs/navigation.go
@@ -104,8 +104,8 @@ func (h *DocsHandler) getDocTitle(docPath string) string {
 
 	// Handle special cases
 	switch filename {
-	case "INDEX.md":
-		return "Documentation Index"
+	case "index.md":
+		return "Index"
 	case "user/user-guide.md":
 		return "User Guide"
 	case "developer/development.md":