diff --git a/Makefile b/Makefile
index c65d273..d83ab9e 100644
--- a/Makefile
+++ b/Makefile
@@ -17,21 +17,21 @@ UUID     := simple-tiling@domoel
 VERSION  := 7.5
 EXTDIR   := $(HOME)/.local/share/gnome-shell/extensions
 
-COMMON_FILES    := schemas exceptions.txt locale *.css README.md LICENSE
-LEGACY_PREFS    := prefs_legacy.js
-ENTERPRISE_PREFS:= prefs_enterprise.js
-INTERIM_PREFS   := prefs_interim.js
-MODERN_PREFS    := prefs_modern.js
+COMMON_FILES     := schemas exceptions.txt locale *.css README.md LICENSE
+LEGACY_PREFS     := prefs_legacy.js
+ENTERPRISE_PREFS := prefs_enterprise.js
+INTERIM_PREFS    := prefs_interim.js
+MODERN_PREFS     := prefs_modern.js
 
 ###############################################################################
 # Helper: copies <file list> <dest>
 ###############################################################################
 define copies
-    @for f in $(1) ; do \
-        if [ -e $$f ] ; then \
-            cp -r $$f $(2)/ ; \
-        fi ; \
-    done
+	@for f in $(1) ; do \
+		if [ -e $$f ] ; then \
+			cp -r $$f $(2)/ ; \
+		fi ; \
+	done
 endef
 
 .PHONY: build build-legacy build-enterprise build-interim build-modern \
@@ -43,104 +43,104 @@ build: build-legacy build-enterprise build-interim build-modern
 # Erzeugt Legacy-ZIP (Shell 3.38)
 ###############################################################################
 build-legacy:
-    @echo "==> Building LEGACY zip (for GNOME 3.38)..."
-    @rm -rf build && mkdir -p build/$(UUID)
-    $(call copies,$(COMMON_FILES),build/$(UUID))
-    @glib-compile-schemas build/$(UUID)/schemas
-    @cp legacy.js       build/$(UUID)/extension.js
-    @cp $(LEGACY_PREFS)  build/$(UUID)/prefs.js
-    @sed -e "s/__UUID__/$(UUID)/g" \
-         -e "s/__VERSION__/$(VERSION)/g" \
-         metadata_legacy.json.in > build/$(UUID)/metadata.json
-    @cd build && zip -qr ../$(UUID)-legacy-v$(VERSION).zip .
-    @rm -rf build
-    @echo "✓  $(UUID)-legacy-v$(VERSION).zip created"
+	@echo "==> Building LEGACY zip (for GNOME 3.38)..."
+	@rm -rf build && mkdir -p build/$(UUID)
+	$(call copies,$(COMMON_FILES),build/$(UUID))
+	@glib-compile-schemas build/$(UUID)/schemas
+	@cp legacy.js       build/$(UUID)/extension.js
+	@cp $(LEGACY_PREFS)  build/$(UUID)/prefs.js
+	@sed -e "s/__UUID__/$(UUID)/g" \
+		 -e "s/__VERSION__/$(VERSION)/g" \
+		 metadata_legacy.json.in > build/$(UUID)/metadata.json
+	@cd build && zip -qr ../$(UUID)-legacy-v$(VERSION).zip .
+	@rm -rf build
+	@echo "✓  $(UUID)-legacy-v$(VERSION).zip created"
 
 ###############################################################################
 # Erzeugt Enterprise-ZIP (Shell 40)
 ###############################################################################
 build-enterprise:
-    @echo "==> Building ENTERPRISE zip (for GNOME 40)..."
-    @rm -rf build && mkdir -p build/$(UUID)
-    $(call copies,$(COMMON_FILES),build/$(UUID))
-    @glib-compile-schemas build/$(UUID)/schemas
-    @cp enterprise.js       build/$(UUID)/extension.js
-    @cp $(ENTERPRISE_PREFS)  build/$(UUID)/prefs.js
-    @sed -e "s/__UUID__/$(UUID)/g" \
-         -e "s/__VERSION__/$(VERSION)/g" \
-         metadata_enterprise.json.in > build/$(UUID)/metadata.json
-    @cd build && zip -qr ../$(UUID)-enterprise-v$(VERSION).zip .
-    @rm -rf build
-    @echo "✓  $(UUID)-enterprise-v$(VERSION).zip created"
+	@echo "==> Building ENTERPRISE zip (for GNOME 40)..."
+	@rm -rf build && mkdir -p build/$(UUID)
+	$(call copies,$(COMMON_FILES),build/$(UUID))
+	@glib-compile-schemas build/$(UUID)/schemas
+	@cp enterprise.js       build/$(UUID)/extension.js
+	@cp $(ENTERPRISE_PREFS)  build/$(UUID)/prefs.js
+	@sed -e "s/__UUID__/$(UUID)/g" \
+		 -e "s/__VERSION__/$(VERSION)/g" \
+		 metadata_enterprise.json.in > build/$(UUID)/metadata.json
+	@cd build && zip -qr ../$(UUID)-enterprise-v$(VERSION).zip .
+	@rm -rf build
+	@echo "✓  $(UUID)-enterprise-v$(VERSION).zip created"
 
 ###############################################################################
 # Erzeugt Interim-ZIP (Shell 41-44)
 ###############################################################################
 build-interim:
-    @echo "==> Building INTERIM zip (for GNOME 41-44)..."
-    @rm -rf build && mkdir -p build/$(UUID)
-    $(call copies,$(COMMON_FILES),build/$(UUID))
-    @glib-compile-schemas build/$(UUID)/schemas
-    @cp interim.js       build/$(UUID)/extension.js
-    @cp $(INTERIM_PREFS)  build/$(UUID)/prefs.js
-    @sed -e "s/__UUID__/$(UUID)/g" \
-         -e "s/__VERSION__/$(VERSION)/g" \
-         metadata_interim.json.in > build/$(UUID)/metadata.json
-    @cd build && zip -qr ../$(UUID)-interim-v$(VERSION).zip .
-    @rm -rf build
-    @echo "✓  $(UUID)-interim-v$(VERSION).zip created"
+	@echo "==> Building INTERIM zip (for GNOME 41-44)..."
+	@rm -rf build && mkdir -p build/$(UUID)
+	$(call copies,$(COMMON_FILES),build/$(UUID))
+	@glib-compile-schemas build/$(UUID)/schemas
+	@cp interim.js       build/$(UUID)/extension.js
+	@cp $(INTERIM_PREFS)  build/$(UUID)/prefs.js
+	@sed -e "s/__UUID__/$(UUID)/g" \
+		 -e "s/__VERSION__/$(VERSION)/g" \
+		 metadata_interim.json.in > build/$(UUID)/metadata.json
+	@cd build && zip -qr ../$(UUID)-interim-v$(VERSION).zip .
+	@rm -rf build
+	@echo "✓  $(UUID)-interim-v$(VERSION).zip created"
 
 ###############################################################################
 # Erzeugt Modern-ZIP (Shell 45+)
 ###############################################################################
 build-modern:
-    @echo "==> Building MODERN zip (for GNOME 45+)..."
-    @rm -rf build && mkdir -p build/$(UUID)
-    $(call copies,$(COMMON_FILES),build/$(UUID))
-    @glib-compile-schemas build/$(UUID)/schemas
-    @cp modern.js       build/$(UUID)/extension.js
-    @cp $(MODERN_PREFS)  build/$(UUID)/prefs.js
-    @sed -e "s/__UUID__/$(UUID)/g" \
-         -e "s/__VERSION__/$(VERSION)/g" \
-         metadata_modern.json.in > build/$(UUID)/metadata.json
-    @cd build && zip -qr ../$(UUID)-modern-v$(VERSION).zip .
-    @rm -rf build
-    @echo "✓  $(UUID)-modern-v$(VERSION).zip created"
+	@echo "==> Building MODERN zip (for GNOME 45+)..."
+	@rm -rf build && mkdir -p build/$(UUID)
+	$(call copies,$(COMMON_FILES),build/$(UUID))
+	@glib-compile-schemas build/$(UUID)/schemas
+	@cp modern.js       build/$(UUID)/extension.js
+	@cp $(MODERN_PREFS)  build/$(UUID)/prefs.js
+	@sed -e "s/__UUID__/$(UUID)/g" \
+		 -e "s/__VERSION__/$(VERSION)/g" \
+		 metadata_modern.json.in > build/$(UUID)/metadata.json
+	@cd build && zip -qr ../$(UUID)-modern-v$(VERSION).zip .
+	@rm -rf build
+	@echo "✓  $(UUID)-modern-v$(VERSION).zip created"
 
 ###############################################################################
 # Installiert die verschiedenen Versionen
 ###############################################################################
 install-legacy: build-legacy
-    @echo "==> Installing LEGACY Extension..."
-    @rm -rf $(EXTDIR)/$(UUID)
-    @unzip -q $(UUID)-legacy-v$(VERSION).zip -d $(EXTDIR)/$(UUID)
-    @rm -f $(UUID)-legacy-v$(VERSION).zip
-    @echo "✓  Legacy Extension installed to $(EXTDIR)/$(UUID). Restart GNOME Shell to apply."
+	@echo "==> Installing LEGACY Extension..."
+	@rm -rf $(EXTDIR)/$(UUID)
+	@unzip -q $(UUID)-legacy-v$(VERSION).zip -d $(EXTDIR)/$(UUID)
+	@rm -f $(UUID)-legacy-v$(VERSION).zip
+	@echo "✓  Legacy Extension installed to $(EXTDIR)/$(UUID). Restart GNOME Shell to apply."
 
 install-enterprise: build-enterprise
-    @echo "==> Installing ENTERPRISE Extension..."
-    @rm -rf $(EXTDIR)/$(UUID)
-    @unzip -q $(UUID)-enterprise-v$(VERSION).zip -d $(EXTDIR)/$(UUID)
-    @rm -f $(UUID)-enterprise-v$(VERSION).zip
-    @echo "✓  Enterprise Extension installed to $(EXTDIR)/$(UUID). Restart GNOME Shell to apply."
+	@echo "==> Installing ENTERPRISE Extension..."
+	@rm -rf $(EXTDIR)/$(UUID)
+	@unzip -q $(UUID)-enterprise-v$(VERSION).zip -d $(EXTDIR)/$(UUID)
+	@rm -f $(UUID)-enterprise-v$(VERSION).zip
+	@echo "✓  Enterprise Extension installed to $(EXTDIR)/$(UUID). Restart GNOME Shell to apply."
 
 install-interim: build-interim
-    @echo "==> Installing INTERIM Extension..."
-    @rm -rf $(EXTDIR)/$(UUID)
-    @unzip -q $(UUID)-interim-v$(VERSION).zip -d $(EXTDIR)/$(UUID)
-    @rm -f $(UUID)-interim-v$(VERSION).zip
-    @echo "✓  Interim Extension installed to $(EXTDIR)/$(UUID). Restart GNOME Shell to apply."
+	@echo "==> Installing INTERIM Extension..."
+	@rm -rf $(EXTDIR)/$(UUID)
+	@unzip -q $(UUID)-interim-v$(VERSION).zip -d $(EXTDIR)/$(UUID)
+	@rm -f $(UUID)-interim-v$(VERSION).zip
+	@echo "✓  Interim Extension installed to $(EXTDIR)/$(UUID). Restart GNOME Shell to apply."
 
 install-modern: build-modern
-    @echo "==> Installing MODERN Extension..."
-    @rm -rf $(EXTDIR)/$(UUID)
-    @unzip -q $(UUID)-modern-v$(VERSION).zip -d $(EXTDIR)/$(UUID)
-    @rm -f $(UUID)-modern-v$(VERSION).zip
-    @echo "✓  Modern Extension installed to $(EXTDIR)/$(UUID). Restart GNOME Shell to apply."
+	@echo "==> Installing MODERN Extension..."
+	@rm -rf $(EXTDIR)/$(UUID)
+	@unzip -q $(UUID)-modern-v$(VERSION).zip -d $(EXTDIR)/$(UUID)
+	@rm -f $(UUID)-modern-v$(VERSION).zip
+	@echo "✓  Modern Extension installed to $(EXTDIR)/$(UUID). Restart GNOME Shell to apply."
 
 ###############################################################################
 # Bereinigt das Ausgangsverzeichnis
 ###############################################################################
 clean:
-    @rm -f $(UUID)-*.zip
-    @echo "Build directory and ZIPs removed."
+	@rm -f $(UUID)-*.zip
+	@echo "Build directory and ZIPs removed."