diff --git a/program/Language.cs b/program/Language.cs
index a9afd86..8b89a70 100644
--- a/program/Language.cs
+++ b/program/Language.cs
@@ -6,10 +6,14 @@
 
 public class Language
 {
-    private const string EngCssPath = "lang_eng.css";
-    private const string JpnCssPath = "lang_jpn.css";
-    private const string EngCsvPath = "info_eng.csv";
-    private const string JpnCsvPath = "info_jpn.csv";
+    // private const string EngCssPath = "lang_eng.css";
+    // private const string JpnCssPath = "lang_jpn.css";
+    // private const string EngCsvPath = "info_eng.csv";
+    // private const string JpnCsvPath = "info_jpn.csv";
+    private static readonly string EngCssPath = Paths.Get("lang_eng.css");
+    private static readonly string JpnCssPath = Paths.Get("lang_jpn.css");
+    private static readonly string EngCsvPath = Paths.Get("info_eng.csv");
+    private static readonly string JpnCsvPath = Paths.Get("info_jpn.csv");
 
     private readonly Dictionary<string, string> _engText;
     private readonly Dictionary<string, string> _jpnText;
diff --git a/program/MainWindow.cs b/program/MainWindow.cs
index b68f449..d2c513d 100644
--- a/program/MainWindow.cs
+++ b/program/MainWindow.cs
@@ -50,7 +50,7 @@
     private static Builder CreateBuilder()
     {
         var builder = new Builder();
-        builder.AddFromFile("homepageall.glade");
+        builder.AddFromFile(Paths.Get("homepageall.glade"));
         return builder;
     }
 
diff --git a/program/Makefile b/program/Makefile
new file mode 100644
index 0000000..f50b32c
--- /dev/null
+++ b/program/Makefile
@@ -0,0 +1,459 @@
+# ===================================================================== config
+APP         := ears
+VERSION     := 1.0.0
+MAINTAINER  := Kazi <kazi.m@chiba-u.jp>
+SUMMARY     := Auscultation training software
+HOMEPAGE     = https://nlab.tms.chiba-u.jp/
+YEAR        := $(shell date +%Y)
+DATESTAMP   := $(shell date -R)
+
+# literal '#', so make never eats shebangs or comment lines as its own comments
+H           := \#
+
+PREFIX      ?= /usr
+DESTDIR     ?=
+LIBDIR      := $(PREFIX)/lib/$(APP)
+BINDIR      := $(PREFIX)/bin
+
+MCS         := mcs
+PKGS        := -pkg:gtk-sharp-3.0
+MCSFLAGS    := -optimize+ -langversion:latest -warn:4
+
+# ------------------------------------------------------------- source discovery
+# Uses src/ and data/ when present, otherwise the project root.
+SRCDIR      ?= $(if $(wildcard src/*.cs),src,.)
+DATADIR     ?= $(if $(wildcard data/*.glade),data,.)
+
+# .cs files in SRCDIR that must NOT be compiled (old WinForms code, scratch files)
+EXCLUDE     ?= Form1.cs Form2.cs
+
+SRC  := $(filter-out $(addprefix $(SRCDIR)/,$(EXCLUDE)),$(wildcard $(SRCDIR)/*.cs))
+DATA := $(wildcard $(DATADIR)/*.glade) $(wildcard $(DATADIR)/*.css) \
+        $(wildcard $(DATADIR)/*.csv)   $(wildcard $(DATADIR)/*.png)
+
+# ---------------------------------------------------------------- output layout
+OUT     := bin
+LOUT    := $(OUT)/linux
+LINST   := $(LOUT)/installer
+LGEN    := $(LINST)/gen
+LROOT   := $(LINST)/root
+EXE     := $(LOUT)/$(APP).exe
+DEB     := $(LINST)/$(APP)_$(VERSION)_all.deb
+
+WOUT    := $(OUT)/windows
+WBUNDLE := $(WOUT)/$(APP)
+WINST   := $(WOUT)/installer
+WGEN    := $(WINST)/gen
+DBGEXE  := $(WBUNDLE)/$(APP)-debug.exe
+WINZIP  := $(WOUT)/$(APP)-$(VERSION)-windows.zip
+SETUP   := $(WINST)/$(APP)-$(VERSION)-setup.exe
+
+# gtk-sharp managed assemblies + their dllmap .config files (for the Win bundle)
+GTKSHARP := $(shell pkg-config --variable=Libraries gtk-sharp-3.0 2>/dev/null)
+ifeq ($(strip $(GTKSHARP)),)
+GTKSHARP := $(wildcard /usr/lib/cli/*/*.dll)
+endif
+GTKSHARP_CFG := $(wildcard $(addsuffix .config,$(GTKSHARP)))
+
+MSYS2 ?= /c/msys64
+MINGW := $(MSYS2)/mingw64
+ISCC  ?= iscc
+
+.DEFAULT_GOAL := all
+.PHONY: all build run debug clean distclean dep-check show
+.PHONY: gen install uninstall deb deb-install deb-remove deb-test lint
+.PHONY: win win-gtk installer everything
+
+all: deb
+build: $(EXE)
+everything: deb win
+
+$(LOUT) $(LGEN) $(LROOT) $(WBUNDLE) $(WGEN):
+	mkdir -p $@
+
+# ================================================================== 1. compile
+$(EXE): $(SRC) | $(LOUT)
+	@test -n "$(strip $(SRC))" || { \
+	  echo "ERROR: no .cs files found (SRCDIR=$(SRCDIR)). Run 'make show'."; exit 1; }
+	$(MCS) -target:winexe $(PKGS) $(MCSFLAGS) -out:$@ $(SRC)
+
+# console build: -target:exe keeps Console.WriteLine visible on Windows
+$(DBGEXE): $(SRC) | $(WBUNDLE)
+	@test -n "$(strip $(SRC))" || { \
+	  echo "ERROR: no .cs files found (SRCDIR=$(SRCDIR)). Run 'make show'."; exit 1; }
+	$(MCS) -target:exe -debug -define:DEBUG $(PKGS) -out:$@ $(SRC)
+
+debug: $(DBGEXE)
+
+run: build
+	EARS_DATADIR=$(CURDIR)/$(DATADIR) mono $(EXE)
+
+clean:
+	rm -rf $(OUT)
+distclean: clean
+
+show:
+	@echo "SRCDIR  = $(SRCDIR)"
+	@echo "DATADIR = $(DATADIR)"
+	@echo "SRC     = $(words $(SRC)) file(s)"
+	@$(foreach f,$(SRC),echo "          $(f)";)
+	@echo "DATA    = $(words $(DATA)) file(s)"
+	@$(foreach f,$(DATA),echo "          $(f)";)
+	@echo "EXE     = $(EXE)"
+	@echo "DEB     = $(DEB)"
+	@echo "GTK#    = $(words $(GTKSHARP)) managed assemblies"
+
+dep-check:
+	@command -v $(MCS) >/dev/null || { echo "missing: mono-devel (mcs)"; exit 1; }
+	@pkg-config --exists gtk-sharp-3.0 || { echo "missing: gtk-sharp3"; exit 1; }
+	@command -v dpkg-deb >/dev/null || { echo "missing: dpkg-dev"; exit 1; }
+	@echo "toolchain OK"
+
+# ========================================================== 2. generated files
+define GEN_WRAPPER
+$(H)!/bin/sh
+$(H) $(APP) launcher - generated by make, do not edit
+: "$${EARS_DATADIR:=$(LIBDIR)}"
+export EARS_DATADIR
+exec /usr/bin/mono "$(LIBDIR)/$(APP).exe" "$$@"
+endef
+
+define GEN_DESKTOP
+[Desktop Entry]
+Type=Application
+Name=EARS
+GenericName=Serial control panel
+Comment=$(SUMMARY)
+Exec=$(APP)
+Icon=$(APP)
+Terminal=false
+Categories=Utility;Electronics;
+Keywords=serial;esp32;arduino;
+StartupNotify=true
+endef
+
+define GEN_ICON
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="128" height="128" viewBox="0 0 128 128">
+  <rect x="8" y="8" width="112" height="112" rx="24" fill="rgb(31,111,235)"/>
+  <g fill="none" stroke="rgb(255,255,255)" stroke-width="8" stroke-linecap="round">
+    <path d="M40 82 V54 a24 24 0 0 1 48 0 V82"/>
+    <path d="M34 82 h20 M74 82 h20"/>
+  </g>
+  <circle cx="64" cy="100" r="7" fill="rgb(255,255,255)"/>
+</svg>
+endef
+
+define GEN_UDEV
+$(H) generated by make - serial adapters used by $(APP)
+$(H) TAG+="uaccess" gives the device to the active desktop user with no group.
+$(H) GROUP="dialout" is the fallback for ssh / headless / WSL sessions.
+ACTION!="add", GOTO="ears_end"
+SUBSYSTEM!="tty", GOTO="ears_end"
+ATTRS{idVendor}=="303a", MODE="0660", GROUP="dialout", TAG+="uaccess"
+ATTRS{idVendor}=="10c4", MODE="0660", GROUP="dialout", TAG+="uaccess"
+ATTRS{idVendor}=="1a86", MODE="0660", GROUP="dialout", TAG+="uaccess"
+ATTRS{idVendor}=="0403", MODE="0660", GROUP="dialout", TAG+="uaccess"
+ATTRS{idVendor}=="2341", MODE="0660", GROUP="dialout", TAG+="uaccess"
+LABEL="ears_end"
+endef
+
+define GEN_CONTROL
+Package: $(APP)
+Version: $(VERSION)
+Section: utils
+Priority: optional
+Architecture: all
+Depends: mono-runtime (>= 6.0), gtk-sharp3, libgtk-3-0 | libgtk-3-0t64, libmono-system4.0-cil | mono-complete
+Recommends: mono-complete
+Installed-Size: @SIZE@
+Maintainer: $(MAINTAINER)
+Homepage: $(HOMEPAGE)
+Description: $(SUMMARY)
+ GTK$(H)3 front end that talks to an ESP32 over a serial port, with
+ English/Japanese language switching and a live device log.
+ .
+ Architecture is "all" because the payload is architecture-neutral CIL
+ executed by the Mono runtime.
+endef
+
+define GEN_POSTINST
+$(H)!/bin/sh
+set -e
+case "$$1" in
+configure)
+    if command -v udevadm >/dev/null 2>&1; then
+        udevadm control --reload-rules >/dev/null 2>&1 || true
+        udevadm trigger --subsystem-match=tty >/dev/null 2>&1 || true
+    fi
+
+    if [ -n "$$SUDO_USER" ] && getent group dialout >/dev/null 2>&1; then
+        if ! id -nG "$$SUDO_USER" 2>/dev/null | tr ' ' '\n' | grep -qx dialout; then
+            usermod -aG dialout "$$SUDO_USER" >/dev/null 2>&1 || true
+            echo "$(APP): added '$$SUDO_USER' to group 'dialout'."
+            echo "$(APP): log out and back in for serial access to take effect."
+        fi
+    fi
+
+    if command -v update-desktop-database >/dev/null 2>&1; then
+        update-desktop-database -q /usr/share/applications || true
+    fi
+    if command -v gtk-update-icon-cache >/dev/null 2>&1; then
+        gtk-update-icon-cache -qtf /usr/share/icons/hicolor || true
+    fi
+    ;;
+esac
+exit 0
+endef
+
+define GEN_POSTRM
+$(H)!/bin/sh
+set -e
+if command -v update-desktop-database >/dev/null 2>&1; then
+    update-desktop-database -q /usr/share/applications || true
+fi
+if command -v gtk-update-icon-cache >/dev/null 2>&1; then
+    gtk-update-icon-cache -qtf /usr/share/icons/hicolor || true
+fi
+exit 0
+endef
+
+define GEN_CHANGELOG
+$(APP) ($(VERSION)) stable; urgency=medium
+
+  * Package generated by make.
+
+ -- $(MAINTAINER)  $(DATESTAMP)
+endef
+
+define GEN_COPYRIGHT
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: $(APP)
+
+Files: *
+Copyright: $(YEAR) $(MAINTAINER)
+License: proprietary
+ All rights reserved.
+endef
+
+gen: | $(LGEN)
+	@$(file >$(LGEN)/$(APP).sh,$(GEN_WRAPPER))
+	@$(file >$(LGEN)/$(APP).desktop,$(GEN_DESKTOP))
+	@$(file >$(LGEN)/$(APP).svg,$(GEN_ICON))
+	@$(file >$(LGEN)/60-$(APP)-serial.rules,$(GEN_UDEV))
+	@$(file >$(LGEN)/control,$(GEN_CONTROL))
+	@$(file >$(LGEN)/postinst,$(GEN_POSTINST))
+	@$(file >$(LGEN)/postrm,$(GEN_POSTRM))
+	@$(file >$(LGEN)/changelog,$(GEN_CHANGELOG))
+	@$(file >$(LGEN)/copyright,$(GEN_COPYRIGHT))
+	@chmod 755 $(LGEN)/postinst $(LGEN)/postrm $(LGEN)/$(APP).sh
+	@echo "generated packaging sources in $(LGEN)"
+
+# =========================================================== 3. make install
+install: build gen
+	install -d $(DESTDIR)$(LIBDIR) $(DESTDIR)$(BINDIR)
+	install -m 644 $(EXE) $(DESTDIR)$(LIBDIR)/$(APP).exe
+	@if [ -n "$(strip $(DATA))" ]; then \
+	  echo "install -m 644 <$(words $(DATA)) data files> $(DESTDIR)$(LIBDIR)/"; \
+	  install -m 644 $(DATA) $(DESTDIR)$(LIBDIR)/; \
+	else \
+	  echo "WARNING: no data files found in '$(DATADIR)'"; \
+	fi
+	install -m 755 $(LGEN)/$(APP).sh $(DESTDIR)$(BINDIR)/$(APP)
+	install -D -m 644 $(LGEN)/$(APP).desktop \
+	  $(DESTDIR)$(PREFIX)/share/applications/$(APP).desktop
+	install -D -m 644 $(LGEN)/$(APP).svg \
+	  $(DESTDIR)$(PREFIX)/share/icons/hicolor/scalable/apps/$(APP).svg
+	install -D -m 644 $(LGEN)/60-$(APP)-serial.rules \
+	  $(DESTDIR)/lib/udev/rules.d/60-$(APP)-serial.rules
+	install -D -m 644 $(LGEN)/copyright \
+	  $(DESTDIR)$(PREFIX)/share/doc/$(APP)/copyright
+	gzip -9nc $(LGEN)/changelog > $(LGEN)/changelog.gz
+	install -D -m 644 $(LGEN)/changelog.gz \
+	  $(DESTDIR)$(PREFIX)/share/doc/$(APP)/changelog.Debian.gz
+
+uninstall:
+	rm -rf $(DESTDIR)$(LIBDIR) $(DESTDIR)$(PREFIX)/share/doc/$(APP)
+	rm -f  $(DESTDIR)$(BINDIR)/$(APP) \
+	       $(DESTDIR)$(PREFIX)/share/applications/$(APP).desktop \
+	       $(DESTDIR)$(PREFIX)/share/icons/hicolor/scalable/apps/$(APP).svg \
+	       $(DESTDIR)/lib/udev/rules.d/60-$(APP)-serial.rules
+
+# ==================================================================== 4. .deb
+deb: build gen
+	rm -rf $(LROOT)
+	$(MAKE) --no-print-directory install DESTDIR=$(CURDIR)/$(LROOT) PREFIX=/usr
+	install -d $(LROOT)/DEBIAN
+	install -m 755 $(LGEN)/postinst $(LGEN)/postrm $(LROOT)/DEBIAN/
+	sed "s|@SIZE@|$$(du -ks --exclude=DEBIAN $(LROOT) | cut -f1)|" \
+	  $(LGEN)/control > $(LROOT)/DEBIAN/control
+	cd $(LROOT) && find . -type f ! -path './DEBIAN/*' -printf '%P\0' \
+	  | LC_ALL=C sort -z | xargs -0 md5sum > DEBIAN/md5sums
+	find $(LROOT) -type d -exec chmod 755 {} +
+	dpkg-deb --build --root-owner-group $(LROOT) $(DEB)
+	@echo
+	@echo "==> $(DEB)"
+	@echo "    sudo apt install ./$(DEB)      # the ./ is required"
+
+deb-install: deb
+	sudo apt install -y ./$(DEB)
+
+deb-remove:
+	sudo apt remove -y $(APP)
+
+lint: deb
+	-lintian --no-tag-display-limit $(DEB)
+
+deb-test: deb
+	docker run --rm -v "$(CURDIR)/$(LINST)":/pkg:ro ubuntu:24.04 sh -c '\
+	  set -e; \
+	  apt-get update -qq; \
+	  DEBIAN_FRONTEND=noninteractive apt-get install -y -qq \
+	    /pkg/$(notdir $(DEB)) xvfb >/dev/null; \
+	  echo "--- files:"; dpkg -L $(APP) | head -20; \
+	  echo "--- runtime:"; mono --version | head -1; \
+	  echo "--- smoke test:"; \
+	  timeout 15 xvfb-run -a $(APP) || echo "exit=$$? (124 = window stayed open, OK)"'
+
+# ================================================================= 5. windows
+define GEN_WINBAT
+@echo off
+setlocal
+set "HERE=%~dp0"
+set "EARS_DATADIR=%HERE%"
+if exist "%HERE%gtk\bin" set "PATH=%HERE%gtk\bin;%PATH%"
+if exist "%HERE%gtk\lib\gdk-pixbuf-2.0\2.10.0\loaders.cache" set "GDK_PIXBUF_MODULE_FILE=%HERE%gtk\lib\gdk-pixbuf-2.0\2.10.0\loaders.cache"
+if exist "%HERE%gtk\share\glib-2.0\schemas" set "GSETTINGS_SCHEMA_DIR=%HERE%gtk\share\glib-2.0\schemas"
+if exist "%HERE%gtk\share" set "XDG_DATA_DIRS=%HERE%gtk\share;%XDG_DATA_DIRS%"
+set "MONO=mono"
+where mono >nul 2>&1 || set "MONO=%ProgramFiles%\Mono\bin\mono.exe"
+if /i not "%MONO%"=="mono" if not exist "%MONO%" (
+  echo Mono for Windows was not found.
+  echo Install it from https://www.mono-project.com/download/stable/
+  pause
+  exit /b 1
+)
+start "" "%MONO%" "%HERE%$(APP).exe" %*
+endef
+
+define GEN_WINBATDBG
+@echo off
+setlocal
+set "HERE=%~dp0"
+set "EARS_DATADIR=%HERE%"
+if exist "%HERE%gtk\bin" set "PATH=%HERE%gtk\bin;%PATH%"
+if exist "%HERE%gtk\lib\gdk-pixbuf-2.0\2.10.0\loaders.cache" set "GDK_PIXBUF_MODULE_FILE=%HERE%gtk\lib\gdk-pixbuf-2.0\2.10.0\loaders.cache"
+if exist "%HERE%gtk\share\glib-2.0\schemas" set "GSETTINGS_SCHEMA_DIR=%HERE%gtk\share\glib-2.0\schemas"
+if exist "%HERE%gtk\share" set "XDG_DATA_DIRS=%HERE%gtk\share;%XDG_DATA_DIRS%"
+set "MONO=mono"
+where mono >nul 2>&1 || set "MONO=%ProgramFiles%\Mono\bin\mono.exe"
+set "MONO_LOG_LEVEL=warning"
+echo Running $(APP) with console output. Close this window to quit.
+"%MONO%" "%HERE%$(APP)-debug.exe" %*
+echo.
+echo exit code %ERRORLEVEL%
+pause
+endef
+
+win: build debug | $(WBUNDLE)
+	cp $(EXE) $(WBUNDLE)/$(APP).exe
+	@if [ -n "$(strip $(DATA))" ]; then cp $(DATA) $(WBUNDLE)/; \
+	 else echo "WARNING: no data files found in '$(DATADIR)'"; fi
+	@if [ -n "$(strip $(GTKSHARP))" ]; then \
+	  cp $(GTKSHARP) $(WBUNDLE)/; \
+	  echo "copied $(words $(GTKSHARP)) gtk-sharp assemblies"; \
+	 else echo "WARNING: gtk-sharp managed assemblies not found"; fi
+	@if [ -n "$(strip $(GTKSHARP_CFG))" ]; then cp $(GTKSHARP_CFG) $(WBUNDLE)/; fi
+	@$(file >$(WBUNDLE)/$(APP).bat,$(GEN_WINBAT))
+	@$(file >$(WBUNDLE)/$(APP)-debug.bat,$(GEN_WINBATDBG))
+	-$(MAKE) --no-print-directory win-gtk MSYS2=$(MSYS2)
+	cd $(WOUT) && rm -f $(notdir $(WINZIP)) && zip -qr $(notdir $(WINZIP)) $(APP)
+	@echo "==> $(WINZIP)"
+
+win-gtk: | $(WBUNDLE)
+	@test -d $(MINGW)/bin || { \
+	  echo "MSYS2 not found at $(MINGW) - shipping without native GTK."; \
+	  echo "  pacman -S mingw-w64-x86_64-gtk3 mingw-w64-x86_64-librsvg mingw-w64-x86_64-ntldd"; \
+	  echo "  then: make win MSYS2=/path/to/msys64"; exit 1; }
+	rm -rf $(WBUNDLE)/gtk
+	mkdir -p $(WBUNDLE)/gtk/bin $(WBUNDLE)/gtk/share $(WBUNDLE)/gtk/lib
+	@echo "resolving native GTK dependencies..."
+	@if command -v ntldd >/dev/null 2>&1; then \
+	  for root in libgtk-3-0.dll librsvg-2-2.dll libgdk_pixbuf-2.0-0.dll; do \
+	    [ -f $(MINGW)/bin/$$root ] || continue; \
+	    ntldd -R $(MINGW)/bin/$$root \
+	      | grep -io '[a-z]:[\\/][^ ]*mingw64[\\/]bin[\\/][^ ]*\.dll' \
+	      | tr '\\' '/' | sort -u \
+	      | while read -r dll; do cp -u "$$dll" $(WBUNDLE)/gtk/bin/ 2>/dev/null || true; done; \
+	    cp -u $(MINGW)/bin/$$root $(WBUNDLE)/gtk/bin/; \
+	  done; \
+	else \
+	  echo "ntldd missing - copying all of mingw64/bin (larger bundle)"; \
+	  cp -u $(MINGW)/bin/*.dll $(WBUNDLE)/gtk/bin/; \
+	fi
+	-cp -r $(MINGW)/lib/gdk-pixbuf-2.0 $(WBUNDLE)/gtk/lib/
+	-cp -r $(MINGW)/share/glib-2.0     $(WBUNDLE)/gtk/share/
+	-cp -r $(MINGW)/share/icons        $(WBUNDLE)/gtk/share/
+	-cp -r $(MINGW)/share/themes       $(WBUNDLE)/gtk/share/
+	@echo "gtk runtime staged ($$(du -sh $(WBUNDLE)/gtk | cut -f1))"
+
+define GEN_ISS
+[Setup]
+AppName=$(APP)
+AppVersion=$(VERSION)
+AppPublisher=$(MAINTAINER)
+DefaultDirName={autopf}\$(APP)
+DefaultGroupName=$(APP)
+OutputBaseFilename=$(APP)-$(VERSION)-setup
+OutputDir=.
+Compression=lzma2/max
+SolidCompression=yes
+ArchitecturesInstallIn64BitMode=x64compatible
+PrivilegesRequired=admin
+UninstallDisplayIcon={app}\$(APP).exe
+WizardStyle=modern
+
+[Files]
+Source: "..\..\$(APP)\*"; DestDir: "{app}"; Flags: recursesubdirs createallsubdirs ignoreversion
+
+[Icons]
+Name: "{group}\$(APP)"; Filename: "{app}\$(APP).bat"; IconFilename: "{app}\$(APP).exe"
+Name: "{group}\$(APP) (console)"; Filename: "{app}\$(APP)-debug.bat"; IconFilename: "{app}\$(APP).exe"
+Name: "{autodesktop}\$(APP)"; Filename: "{app}\$(APP).bat"; IconFilename: "{app}\$(APP).exe"; Tasks: desktopicon
+
+[Tasks]
+Name: "desktopicon"; Description: "Create a desktop shortcut"; GroupDescription: "Additional icons:"
+
+[Run]
+Filename: "{app}\$(APP).bat"; Description: "Launch $(APP)"; Flags: postinstall nowait skipifsilent shellexec
+
+[Code]
+function MonoPresent(): Boolean;
+begin
+  Result := FileExists(ExpandConstant('{commonpf}\Mono\bin\mono.exe')) or
+            FileExists(ExpandConstant('{commonpf32}\Mono\bin\mono.exe')) or
+            RegKeyExists(HKLM, 'SOFTWARE\Novell\Mono') or
+            RegKeyExists(HKLM, 'SOFTWARE\WOW6432Node\Novell\Mono');
+end;
+
+function InitializeSetup(): Boolean;
+var Code: Integer;
+begin
+  Result := True;
+  if not MonoPresent() then
+    if MsgBox('Mono for Windows was not detected. Open the download page now?',
+              mbConfirmation, MB_YESNO) = IDYES then
+      ShellExec('open', 'https://www.mono-project.com/download/stable/',
+                '', '', SW_SHOW, ewNoWait, Code);
+end;
+endef
+
+installer: win | $(WGEN)
+	@$(file >$(WGEN)/$(APP).iss,$(GEN_ISS))
+	@command -v $(ISCC) >/dev/null 2>&1 || { \
+	  echo "Inno Setup compiler '$(ISCC)' not found."; \
+	  echo "  Windows: make installer ISCC=\"/c/Program Files (x86)/Inno Setup 6/ISCC.exe\""; \
+	  echo "  Linux:   make installer ISCC=\"wine /path/to/ISCC.exe\""; exit 1; }
+	cd $(WGEN) && $(ISCC) $(APP).iss
+	mv $(WGEN)/$(APP)-$(VERSION)-setup.exe $(SETUP)
+	@echo "==> $(SETUP)"
\ No newline at end of file
diff --git a/program/Paths.cs b/program/Paths.cs
new file mode 100644
index 0000000..16cf392
--- /dev/null
+++ b/program/Paths.cs
@@ -0,0 +1,33 @@
+using System;
+using System.IO;
+using System.Reflection;
+
+public static class Paths
+{
+    static readonly string ExeDir =
+        Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+
+    public static readonly string DataDir = Resolve();
+
+    const string Probe = "homepageall.glade";
+
+    static string Resolve()
+    {
+        string[] candidates = {
+            Environment.GetEnvironmentVariable("EARS_DATADIR"),
+            ExeDir,
+            Path.Combine(ExeDir, "data"),
+            Path.Combine(ExeDir, "..", "data"),   // make run from bin/linux
+            "/usr/lib/ears",
+            "/usr/local/lib/ears",
+        };
+
+        foreach (var c in candidates)
+            if (!string.IsNullOrEmpty(c) && File.Exists(Path.Combine(c, Probe)))
+                return Path.GetFullPath(c);
+
+        return ExeDir;
+    }
+
+    public static string Get(string name) => Path.Combine(DataDir, name);
+}
\ No newline at end of file
diff --git a/program/tempMakefile.txt b/program/tempMakefile.txt
new file mode 100644
index 0000000..dc9aa0b
--- /dev/null
+++ b/program/tempMakefile.txt
@@ -0,0 +1,101 @@
+APP     := ears
+VERSION := 1.0.0
+OUT     := bin/linux/installer
+DIST    := dist
+STAGE   := $(HOME)/.cache/$(APP)-build
+PKGDIR  := $(STAGE)/$(APP)_$(VERSION)_all
+
+SRC     := $(filter-out Form1.cs Form2.cs, $(wildcard *.cs))
+GLADE   := $(wildcard *.glade)
+ASSETS  := $(wildcard map sound)
+
+.ONESHELL:
+.SHELLFLAGS := -ec
+.PHONY: all run clean deb init-packaging list
+
+all: $(OUT)/program.exe
+
+$(OUT)/program.exe: $(SRC) $(GLADE)
+	mkdir -p $(OUT)
+	mcs -target:winexe -pkg:gtk-sharp-3.0 \
+	    $(foreach f,$(GLADE),-resource:$(f),$(notdir $(f))) \
+	    $(SRC) -out:$@
+run: all
+	mono $(OUT)/program.exe
+
+deb: all
+	rm -rf "$(PKGDIR)"
+	install -Dm755 packaging/launcher.sh    "$(PKGDIR)/usr/bin/$(APP)"
+	install -Dm644 $(OUT)/program.exe       "$(PKGDIR)/usr/lib/$(APP)/program.exe"
+	install -Dm644 packaging/app.desktop    "$(PKGDIR)/usr/share/applications/$(APP).desktop"
+	install -Dm644 packaging/udev.rules     "$(PKGDIR)/lib/udev/rules.d/99-$(APP).rules"
+	install -Dm644 packaging/control        "$(PKGDIR)/DEBIAN/control"
+	install -Dm755 packaging/postinst       "$(PKGDIR)/DEBIAN/postinst"
+	install -Dm755 packaging/postrm         "$(PKGDIR)/DEBIAN/postrm"
+	if [ -n "$(ASSETS)" ]; then cp -r $(ASSETS) "$(PKGDIR)/usr/lib/$(APP)/"; fi
+	find "$(PKGDIR)" -type d -exec chmod 755 {} +
+	find "$(PKGDIR)" -type f -exec chmod 644 {} +
+	chmod 755 "$(PKGDIR)/usr/bin/$(APP)" \
+	          "$(PKGDIR)/DEBIAN/postinst" "$(PKGDIR)/DEBIAN/postrm"
+	sed -i 's/\r$$//' "$(PKGDIR)/usr/bin/$(APP)" \
+	                  "$(PKGDIR)/DEBIAN/postinst" "$(PKGDIR)/DEBIAN/postrm"
+	mkdir -p $(DIST)
+	dpkg-deb --build --root-owner-group "$(PKGDIR)" $(DIST)/$(APP)_$(VERSION)_all.deb
+	dpkg -c $(DIST)/$(APP)_$(VERSION)_all.deb
+
+clean:
+	rm -rf $(OUT) $(DIST) "$(STAGE)"
+
+list:
+	@grep -E '^[a-zA-Z_-]+:' Makefile | cut -d: -f1
+
+init-packaging:
+	mkdir -p packaging
+	cat > packaging/launcher.sh <<-'EOF'
+	#!/bin/sh
+	cd /usr/lib/$(APP) || exit 1
+	exec /usr/bin/mono ./program.exe "$$@"
+	EOF
+	cat > packaging/app.desktop <<-EOF
+	[Desktop Entry]
+	Type=Application
+	Name=EARS
+	Comment=Auscultation Training Software
+	Exec=$(APP)
+	Icon=$(APP)
+	Terminal=false
+	Categories=Utility;Electronics;
+	EOF
+	cat > packaging/control <<-EOF
+	Package: $(APP)
+	Version: $(VERSION)
+	Section: utils
+	Priority: optional
+	Architecture: all
+	Depends: mono-runtime (>= 6.0), gtk-sharp3, libgtk-3-0
+	Maintainer: kazi <kazi.chiba-u.hp>
+	Description: Arduino serial control tool
+	 GTK# application that connects to the device over USB serial.
+	EOF
+	cat > packaging/udev.rules <<-'EOF'
+	SUBSYSTEM=="tty", ATTRS{idVendor}=="10c4", TAG+="uaccess", ENV{ID_MM_DEVICE_IGNORE}="1"
+	SUBSYSTEM=="tty", ATTRS{idVendor}=="1a86", TAG+="uaccess", ENV{ID_MM_DEVICE_IGNORE}="1"
+	SUBSYSTEM=="tty", ATTRS{idVendor}=="303a", TAG+="uaccess", ENV{ID_MM_DEVICE_IGNORE}="1"
+	SUBSYSTEM=="tty", ATTRS{idVendor}=="2341", TAG+="uaccess", ENV{ID_MM_DEVICE_IGNORE}="1"
+	EOF
+	cat > packaging/postinst <<-'EOF'
+	#!/bin/sh
+	set -e
+	udevadm control --reload-rules || true
+	udevadm trigger --subsystem-match=tty || true
+	update-desktop-database -q /usr/share/applications || true
+	exit 0
+	EOF
+	cat > packaging/postrm <<-'EOF'
+	#!/bin/sh
+	set -e
+	udevadm control --reload-rules || true
+	exit 0
+	EOF
+	chmod 755 packaging/launcher.sh packaging/postinst packaging/postrm
+	echo "packaging/ created — edit control and udev.rules, then run: make deb"
\ No newline at end of file