diff --git a/.editorconfig b/.editorconfig
index 8d86e4518e450377768d1de80adafba87984a148..b0b3e1fe2543143896ee06ae7b9984f8bd038f73 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -11,5 +11,8 @@ insert_final_newline = true
 [*.json]
 indent_size = 2
 
+[*.yaml]
+indent_size = 2
+
 [*.md]
 trim_trailing_whitespace = false
diff --git a/.gitignore b/.gitignore
index 361df94f91db934b411ea13244ac8db6f41f3888..54ae0222de3e722adfb2b48c14d77c4d074dafda 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 .buildlog/
 .history
 .svn/
+migrate_working_dir/
 
 # IntelliJ related
 *.iml
diff --git a/assets/fonts/Nunito-Bold.ttf b/assets/fonts/Nunito-Bold.ttf
deleted file mode 100644
index 6519feb781449ebe0015cbc74dfd9e13110fbba9..0000000000000000000000000000000000000000
Binary files a/assets/fonts/Nunito-Bold.ttf and /dev/null differ
diff --git a/assets/fonts/Nunito-Light.ttf b/assets/fonts/Nunito-Light.ttf
deleted file mode 100644
index 8a0736c41cd6c2a1225d356bf274de1d0afc3497..0000000000000000000000000000000000000000
Binary files a/assets/fonts/Nunito-Light.ttf and /dev/null differ
diff --git a/assets/fonts/Nunito-Medium.ttf b/assets/fonts/Nunito-Medium.ttf
deleted file mode 100644
index 88fccdc0638b6f5d6ac49d9d269dc3d518618ad1..0000000000000000000000000000000000000000
Binary files a/assets/fonts/Nunito-Medium.ttf and /dev/null differ
diff --git a/assets/fonts/Nunito-Regular.ttf b/assets/fonts/Nunito-Regular.ttf
deleted file mode 100644
index e7b8375a896ef0cd8e06730a78c84532b377e784..0000000000000000000000000000000000000000
Binary files a/assets/fonts/Nunito-Regular.ttf and /dev/null differ
diff --git a/fastlane/metadata/android/en-US/changelogs/76.txt b/fastlane/metadata/android/en-US/changelogs/76.txt
new file mode 100644
index 0000000000000000000000000000000000000000..65ba5e83570223adc45ccea599a3487b24b8a7dd
--- /dev/null
+++ b/fastlane/metadata/android/en-US/changelogs/76.txt
@@ -0,0 +1 @@
+Use flutter_custom_toolbox for common features.
diff --git a/fastlane/metadata/android/fr-FR/changelogs/76.txt b/fastlane/metadata/android/fr-FR/changelogs/76.txt
new file mode 100644
index 0000000000000000000000000000000000000000..258c624fb3898d91b6b70d7d99db2719c1bf0751
--- /dev/null
+++ b/fastlane/metadata/android/fr-FR/changelogs/76.txt
@@ -0,0 +1 @@
+Utilisation de flutter_custom_toolbox pour les fonctionnalités communes.
diff --git a/lib/config/default_game_settings.dart b/lib/config/default_game_settings.dart
index 5f40e12f49a2ca755b041109d0fbf16019c7cf7d..00d8e20dd7e6853ab97ee9c5ffc3e994479d4623 100644
--- a/lib/config/default_game_settings.dart
+++ b/lib/config/default_game_settings.dart
@@ -1,4 +1,4 @@
-import 'package:sudoku/utils/tools.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 class DefaultGameSettings {
   // available game parameters codes
diff --git a/lib/config/default_global_settings.dart b/lib/config/default_global_settings.dart
index e115b4330b63330bbd7be962a4f3ee9eb7a3cc81..e1c7b20dc0c16ddce5697749fa7a2dcd3a02aa2a 100644
--- a/lib/config/default_global_settings.dart
+++ b/lib/config/default_global_settings.dart
@@ -1,4 +1,4 @@
-import 'package:sudoku/utils/tools.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 class DefaultGlobalSettings {
   // available global parameters codes
diff --git a/lib/config/menu.dart b/lib/config/menu.dart
index 64fb1ac637edb15b3c81d8724e42e4064defd19c..d3c7f1e7c10b0b14424703e8f0b943119e776dd9 100644
--- a/lib/config/menu.dart
+++ b/lib/config/menu.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:unicons/unicons.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/ui/screens/page_about.dart';
 import 'package:sudoku/ui/screens/page_game.dart';
diff --git a/lib/config/theme.dart b/lib/config/theme.dart
deleted file mode 100644
index 74f532fd5abf693979118609564d29167e902009..0000000000000000000000000000000000000000
--- a/lib/config/theme.dart
+++ /dev/null
@@ -1,190 +0,0 @@
-import 'package:flutter/material.dart';
-
-/// Colors from Tailwind CSS (v3.0) - June 2022
-///
-/// https://tailwindcss.com/docs/customizing-colors
-
-const int _primaryColor = 0xFF6366F1;
-const MaterialColor primarySwatch = MaterialColor(_primaryColor, <int, Color>{
-  50: Color(0xFFEEF2FF), // indigo-50
-  100: Color(0xFFE0E7FF), // indigo-100
-  200: Color(0xFFC7D2FE), // indigo-200
-  300: Color(0xFFA5B4FC), // indigo-300
-  400: Color(0xFF818CF8), // indigo-400
-  500: Color(_primaryColor), // indigo-500
-  600: Color(0xFF4F46E5), // indigo-600
-  700: Color(0xFF4338CA), // indigo-700
-  800: Color(0xFF3730A3), // indigo-800
-  900: Color(0xFF312E81), // indigo-900
-});
-
-const int _textColor = 0xFF64748B;
-const MaterialColor textSwatch = MaterialColor(_textColor, <int, Color>{
-  50: Color(0xFFF8FAFC), // slate-50
-  100: Color(0xFFF1F5F9), // slate-100
-  200: Color(0xFFE2E8F0), // slate-200
-  300: Color(0xFFCBD5E1), // slate-300
-  400: Color(0xFF94A3B8), // slate-400
-  500: Color(_textColor), // slate-500
-  600: Color(0xFF475569), // slate-600
-  700: Color(0xFF334155), // slate-700
-  800: Color(0xFF1E293B), // slate-800
-  900: Color(0xFF0F172A), // slate-900
-});
-
-const Color errorColor = Color(0xFFDC2626); // red-600
-
-final ColorScheme lightColorScheme = ColorScheme.light(
-  primary: primarySwatch.shade500,
-  secondary: primarySwatch.shade500,
-  onSecondary: Colors.white,
-  error: errorColor,
-  onSurface: textSwatch.shade500,
-  surface: textSwatch.shade50,
-  surfaceContainerHighest: Colors.white,
-  shadow: textSwatch.shade900.withOpacity(.1),
-);
-
-final ColorScheme darkColorScheme = ColorScheme.dark(
-  primary: primarySwatch.shade500,
-  secondary: primarySwatch.shade500,
-  onSecondary: Colors.white,
-  error: errorColor,
-  onSurface: textSwatch.shade300,
-  surface: const Color(0xFF262630),
-  surfaceContainerHighest: const Color(0xFF282832),
-  shadow: textSwatch.shade900.withOpacity(.2),
-);
-
-final ThemeData lightTheme = ThemeData(
-  colorScheme: lightColorScheme,
-  fontFamily: 'Nunito',
-  textTheme: TextTheme(
-    displayLarge: TextStyle(
-      color: textSwatch.shade700,
-      fontFamily: 'Nunito',
-    ),
-    displayMedium: TextStyle(
-      color: textSwatch.shade600,
-      fontFamily: 'Nunito',
-    ),
-    displaySmall: TextStyle(
-      color: textSwatch.shade500,
-      fontFamily: 'Nunito',
-    ),
-    headlineLarge: TextStyle(
-      color: textSwatch.shade700,
-      fontFamily: 'Nunito',
-    ),
-    headlineMedium: TextStyle(
-      color: textSwatch.shade600,
-      fontFamily: 'Nunito',
-    ),
-    headlineSmall: TextStyle(
-      color: textSwatch.shade500,
-      fontFamily: 'Nunito',
-    ),
-    titleLarge: TextStyle(
-      color: textSwatch.shade700,
-      fontFamily: 'Nunito',
-    ),
-    titleMedium: TextStyle(
-      color: textSwatch.shade600,
-      fontFamily: 'Nunito',
-    ),
-    titleSmall: TextStyle(
-      color: textSwatch.shade500,
-      fontFamily: 'Nunito',
-    ),
-    bodyLarge: TextStyle(
-      color: textSwatch.shade700,
-      fontFamily: 'Nunito',
-    ),
-    bodyMedium: TextStyle(
-      color: textSwatch.shade600,
-      fontFamily: 'Nunito',
-    ),
-    bodySmall: TextStyle(
-      color: textSwatch.shade500,
-      fontFamily: 'Nunito',
-    ),
-    labelLarge: TextStyle(
-      color: textSwatch.shade700,
-      fontFamily: 'Nunito',
-    ),
-    labelMedium: TextStyle(
-      color: textSwatch.shade600,
-      fontFamily: 'Nunito',
-    ),
-    labelSmall: TextStyle(
-      color: textSwatch.shade500,
-      fontFamily: 'Nunito',
-    ),
-  ),
-);
-
-final ThemeData darkTheme = lightTheme.copyWith(
-  colorScheme: darkColorScheme,
-  textTheme: TextTheme(
-    displayLarge: TextStyle(
-      color: textSwatch.shade200,
-      fontFamily: 'Nunito',
-    ),
-    displayMedium: TextStyle(
-      color: textSwatch.shade300,
-      fontFamily: 'Nunito',
-    ),
-    displaySmall: TextStyle(
-      color: textSwatch.shade400,
-      fontFamily: 'Nunito',
-    ),
-    headlineLarge: TextStyle(
-      color: textSwatch.shade200,
-      fontFamily: 'Nunito',
-    ),
-    headlineMedium: TextStyle(
-      color: textSwatch.shade300,
-      fontFamily: 'Nunito',
-    ),
-    headlineSmall: TextStyle(
-      color: textSwatch.shade400,
-      fontFamily: 'Nunito',
-    ),
-    titleLarge: TextStyle(
-      color: textSwatch.shade200,
-      fontFamily: 'Nunito',
-    ),
-    titleMedium: TextStyle(
-      color: textSwatch.shade300,
-      fontFamily: 'Nunito',
-    ),
-    titleSmall: TextStyle(
-      color: textSwatch.shade400,
-      fontFamily: 'Nunito',
-    ),
-    bodyLarge: TextStyle(
-      color: textSwatch.shade200,
-      fontFamily: 'Nunito',
-    ),
-    bodyMedium: TextStyle(
-      color: textSwatch.shade300,
-      fontFamily: 'Nunito',
-    ),
-    bodySmall: TextStyle(
-      color: textSwatch.shade400,
-      fontFamily: 'Nunito',
-    ),
-    labelLarge: TextStyle(
-      color: textSwatch.shade200,
-      fontFamily: 'Nunito',
-    ),
-    labelMedium: TextStyle(
-      color: textSwatch.shade300,
-      fontFamily: 'Nunito',
-    ),
-    labelSmall: TextStyle(
-      color: textSwatch.shade400,
-      fontFamily: 'Nunito',
-    ),
-  ),
-);
diff --git a/lib/cubit/game_cubit.dart b/lib/cubit/game_cubit.dart
index 1fca0d001544ca665042d18c350f522d767e0e91..0faf02ae65ea6778b03818cc739843f2a21bf6b7 100644
--- a/lib/cubit/game_cubit.dart
+++ b/lib/cubit/game_cubit.dart
@@ -1,11 +1,10 @@
 import 'dart:async';
 import 'dart:math';
 
-import 'package:equatable/equatable.dart';
 import 'package:flutter/material.dart';
-import 'package:hydrated_bloc/hydrated_bloc.dart';
-import 'package:sudoku/config/default_global_settings.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
+import 'package:sudoku/config/default_global_settings.dart';
 import 'package:sudoku/models/game/cell.dart';
 import 'package:sudoku/models/game/cell_location.dart';
 import 'package:sudoku/models/game/game.dart';
diff --git a/lib/cubit/nav_cubit.dart b/lib/cubit/nav_cubit.dart
index dda1a09275a96a6f78235db246ccf9a11739f78b..b224fae946671af23e7cbc8eb2f4b05fc8bf1448 100644
--- a/lib/cubit/nav_cubit.dart
+++ b/lib/cubit/nav_cubit.dart
@@ -1,4 +1,4 @@
-import 'package:hydrated_bloc/hydrated_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/menu.dart';
 
diff --git a/lib/cubit/settings_game_cubit.dart b/lib/cubit/settings_game_cubit.dart
index 2ac251742867c9975bcb28831881942aa226eb0e..65111b0ec024e045c6bf304db11b39d94effbe16 100644
--- a/lib/cubit/settings_game_cubit.dart
+++ b/lib/cubit/settings_game_cubit.dart
@@ -1,6 +1,5 @@
-import 'package:equatable/equatable.dart';
 import 'package:flutter/material.dart';
-import 'package:hydrated_bloc/hydrated_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/default_game_settings.dart';
 import 'package:sudoku/models/settings/settings_game.dart';
diff --git a/lib/cubit/settings_global_cubit.dart b/lib/cubit/settings_global_cubit.dart
index f14c602e46a2afb8d0c85ad3d65013f9fd50ff22..e37f2e359bba20b5732b0d6cfcc09671cdb13d8e 100644
--- a/lib/cubit/settings_global_cubit.dart
+++ b/lib/cubit/settings_global_cubit.dart
@@ -1,6 +1,5 @@
-import 'package:equatable/equatable.dart';
 import 'package:flutter/material.dart';
-import 'package:hydrated_bloc/hydrated_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/default_global_settings.dart';
 import 'package:sudoku/models/settings/settings_global.dart';
diff --git a/lib/cubit/theme_cubit.dart b/lib/cubit/theme_cubit.dart
index b793e895dbb0c672d451cd403e0036c3d9ac9b42..1ecab6014c67a0393eabbf704b8b85c9e988705e 100644
--- a/lib/cubit/theme_cubit.dart
+++ b/lib/cubit/theme_cubit.dart
@@ -1,6 +1,5 @@
-import 'package:equatable/equatable.dart';
 import 'package:flutter/material.dart';
-import 'package:hydrated_bloc/hydrated_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 part 'theme_state.dart';
 
diff --git a/lib/main.dart b/lib/main.dart
index c6929f767649ddf90915e9c7b5d7f20f34606c23..d6f6b9d14a5ea586fdfacb19c4050a7be687a110 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -1,15 +1,10 @@
 import 'dart:io';
 
-import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
-import 'package:hive/hive.dart';
-import 'package:hydrated_bloc/hydrated_bloc.dart';
-import 'package:path_provider/path_provider.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/default_global_settings.dart';
-import 'package:sudoku/config/theme.dart';
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/cubit/nav_cubit.dart';
 import 'package:sudoku/cubit/settings_game_cubit.dart';
diff --git a/lib/models/game/board.dart b/lib/models/game/board.dart
index 852cc2195c2d58fe4f5517a50cb4de64d43eb309..aa6d6df2e24d5dfbd6770dc7681949931985fe22 100644
--- a/lib/models/game/board.dart
+++ b/lib/models/game/board.dart
@@ -1,9 +1,10 @@
 import 'dart:math';
 
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
+
 import 'package:sudoku/models/game/cell.dart';
 import 'package:sudoku/models/game/cell_location.dart';
 import 'package:sudoku/models/game/types.dart';
-import 'package:sudoku/utils/tools.dart';
 
 class Board {
   Board({
diff --git a/lib/models/game/cell.dart b/lib/models/game/cell.dart
index 8da6e6a28db6151b55d799dc51b67ebdbf828cfb..ffd7e63567c15754eae955fe69404b34573e6228 100644
--- a/lib/models/game/cell.dart
+++ b/lib/models/game/cell.dart
@@ -1,5 +1,6 @@
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
+
 import 'package:sudoku/models/game/cell_location.dart';
-import 'package:sudoku/utils/tools.dart';
 
 class Cell {
   const Cell({
diff --git a/lib/models/game/cell_location.dart b/lib/models/game/cell_location.dart
index e3c14a8c27cc1368afb9fdd30d4683206c9df987..faab76a9b8941302457f763d3bb869f94944e850 100644
--- a/lib/models/game/cell_location.dart
+++ b/lib/models/game/cell_location.dart
@@ -1,4 +1,4 @@
-import 'package:sudoku/utils/tools.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 class CellLocation {
   final int col;
diff --git a/lib/models/game/game.dart b/lib/models/game/game.dart
index c59d00101f803503025531a00493b0521fa3fcf4..e8490ff8310dcaf57d9fe49f9a1e29e8a85a6808 100644
--- a/lib/models/game/game.dart
+++ b/lib/models/game/game.dart
@@ -1,5 +1,7 @@
 import 'dart:math';
 
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
+
 import 'package:sudoku/config/default_global_settings.dart';
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/data/game_data.dart';
@@ -9,7 +11,6 @@ import 'package:sudoku/models/game/cell_location.dart';
 import 'package:sudoku/models/game/types.dart';
 import 'package:sudoku/models/settings/settings_game.dart';
 import 'package:sudoku/models/settings/settings_global.dart';
-import 'package:sudoku/utils/tools.dart';
 
 class Game {
   Game({
diff --git a/lib/models/settings/settings_game.dart b/lib/models/settings/settings_game.dart
index 17380bd51c0851df263b635596666cb9f1bd17a7..5b7c005acb218c4874b7802dd37b42c28d1147b8 100644
--- a/lib/models/settings/settings_game.dart
+++ b/lib/models/settings/settings_game.dart
@@ -1,5 +1,6 @@
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
+
 import 'package:sudoku/config/default_game_settings.dart';
-import 'package:sudoku/utils/tools.dart';
 
 class GameSettings {
   final String level;
diff --git a/lib/models/settings/settings_global.dart b/lib/models/settings/settings_global.dart
index b96912020563dd4ace4494be96626d80f8da65d6..058d424d6549280f1da5febd88c11e4dba40bd99 100644
--- a/lib/models/settings/settings_global.dart
+++ b/lib/models/settings/settings_global.dart
@@ -1,5 +1,6 @@
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
+
 import 'package:sudoku/config/default_global_settings.dart';
-import 'package:sudoku/utils/tools.dart';
 
 class GlobalSettings {
   String skin;
diff --git a/lib/ui/game/game_bottom.dart b/lib/ui/game/game_bottom.dart
index 954defbe05eb232d3bb9f068093795fe7dff31c3..e6e358d1a1a827ed3cb5d8838bec2772e992d5bf 100644
--- a/lib/ui/game/game_bottom.dart
+++ b/lib/ui/game/game_bottom.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/game.dart';
diff --git a/lib/ui/game/game_end.dart b/lib/ui/game/game_end.dart
index 621336777cd00d8b893dbe3191373bc3b21c2f14..62f2bcddf89514b2b7104b74d4911165d5d904ab 100644
--- a/lib/ui/game/game_end.dart
+++ b/lib/ui/game/game_end.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/game.dart';
diff --git a/lib/ui/game/game_top.dart b/lib/ui/game/game_top.dart
index 5bac69a675b68fae7d3fc6f8ec8f45f37bf9e545..32aace448a3446ec553986c4168515e08bad2587 100644
--- a/lib/ui/game/game_top.dart
+++ b/lib/ui/game/game_top.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/game.dart';
diff --git a/lib/ui/helpers/app_titles.dart b/lib/ui/helpers/app_titles.dart
deleted file mode 100644
index b98107b12fabc3114ebfbec994166b588abcf1ad..0000000000000000000000000000000000000000
--- a/lib/ui/helpers/app_titles.dart
+++ /dev/null
@@ -1,32 +0,0 @@
-import 'package:easy_localization/easy_localization.dart';
-import 'package:flutter/material.dart';
-
-class AppHeader extends StatelessWidget {
-  const AppHeader({super.key, required this.text});
-
-  final String text;
-
-  @override
-  Widget build(BuildContext context) {
-    return Text(
-      tr(text),
-      textAlign: TextAlign.start,
-      style: Theme.of(context).textTheme.headlineMedium!.apply(fontWeightDelta: 2),
-    );
-  }
-}
-
-class AppTitle extends StatelessWidget {
-  const AppTitle({super.key, required this.text});
-
-  final String text;
-
-  @override
-  Widget build(BuildContext context) {
-    return Text(
-      tr(text),
-      textAlign: TextAlign.start,
-      style: Theme.of(context).textTheme.titleLarge!.apply(fontWeightDelta: 2),
-    );
-  }
-}
diff --git a/lib/ui/helpers/outlined_text_widget.dart b/lib/ui/helpers/outlined_text_widget.dart
deleted file mode 100644
index 342eb310db85d9cf969b70003d514441d3794a11..0000000000000000000000000000000000000000
--- a/lib/ui/helpers/outlined_text_widget.dart
+++ /dev/null
@@ -1,51 +0,0 @@
-import 'package:flutter/material.dart';
-
-import 'package:sudoku/utils/color_extensions.dart';
-
-class OutlinedText extends StatelessWidget {
-  const OutlinedText({
-    super.key,
-    required this.text,
-    required this.fontSize,
-    required this.textColor,
-    this.outlineColor,
-  });
-
-  final String text;
-  final double fontSize;
-  final Color textColor;
-  final Color? outlineColor;
-
-  @override
-  Widget build(BuildContext context) {
-    final double delta = fontSize / 30;
-
-    return Text(
-      text,
-      style: TextStyle(
-        inherit: true,
-        fontSize: fontSize,
-        fontWeight: FontWeight.w600,
-        color: textColor,
-        shadows: [
-          Shadow(
-            offset: Offset(-delta, -delta),
-            color: outlineColor ?? textColor.darken(),
-          ),
-          Shadow(
-            offset: Offset(delta, -delta),
-            color: outlineColor ?? textColor.darken(),
-          ),
-          Shadow(
-            offset: Offset(delta, delta),
-            color: outlineColor ?? textColor.darken(),
-          ),
-          Shadow(
-            offset: Offset(-delta, delta),
-            color: outlineColor ?? textColor.darken(),
-          ),
-        ],
-      ),
-    );
-  }
-}
diff --git a/lib/ui/helpers/styled_button.dart b/lib/ui/helpers/styled_button.dart
deleted file mode 100644
index c6102e762db803e22d3dcf5b8a3cd0d8a0d48525..0000000000000000000000000000000000000000
--- a/lib/ui/helpers/styled_button.dart
+++ /dev/null
@@ -1,210 +0,0 @@
-import 'package:auto_size_text/auto_size_text.dart';
-import 'package:flutter/material.dart';
-
-import 'package:sudoku/utils/color_extensions.dart';
-
-class StyledButton extends StatelessWidget {
-  const StyledButton({
-    super.key,
-    required this.color,
-    required this.onPressed,
-    this.onLongPress,
-    required this.child,
-  });
-
-  final Color color;
-  final VoidCallback? onPressed;
-  final VoidCallback? onLongPress;
-  final Widget child;
-
-  factory StyledButton.text({
-    Key? key,
-    required VoidCallback? onPressed,
-    VoidCallback? onLongPress,
-    required String caption,
-    required Color color,
-  }) {
-    final Widget captionWidget = AutoSizeText(
-      caption,
-      maxLines: 1,
-      style: TextStyle(
-        inherit: true,
-        fontWeight: FontWeight.w900,
-        color: color.darken(60),
-        shadows: [
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(2, 2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(2, -2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(-2, 2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(-2, -2),
-          ),
-        ],
-      ),
-    );
-
-    return StyledButton(
-      color: color,
-      onPressed: onPressed,
-      onLongPress: onLongPress,
-      child: captionWidget,
-    );
-  }
-
-  factory StyledButton.icon({
-    Key? key,
-    required VoidCallback? onPressed,
-    VoidCallback? onLongPress,
-    required Icon icon,
-    required Color color,
-    required double iconSize,
-  }) {
-    return StyledButton(
-      color: color,
-      onPressed: onPressed,
-      onLongPress: onLongPress,
-      child: Icon(
-        icon.icon,
-        color: icon.color ?? color.darken(60),
-        size: iconSize,
-        shadows: [
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(2, 2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(2, -2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(-2, 2),
-          ),
-          Shadow(
-            blurRadius: 5.0,
-            color: color.lighten(60),
-            offset: const Offset(-2, -2),
-          ),
-        ],
-      ),
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    const double borderWidth = 4;
-    final Color borderColor = color.darken(40);
-    const double borderRadius = 10;
-
-    return Container(
-      margin: const EdgeInsets.all(2),
-      padding: const EdgeInsets.all(2),
-      decoration: BoxDecoration(
-        color: color,
-        border: Border.all(
-          color: borderColor,
-          width: borderWidth,
-        ),
-        borderRadius: BorderRadius.circular(borderRadius),
-      ),
-      child: CustomPaint(
-        painter: StyledButtonPainter(
-          baseColor: color,
-        ),
-        child: MaterialButton(
-          onPressed: onPressed,
-          onLongPress: onLongPress,
-          padding: const EdgeInsets.all(8),
-          materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
-          minWidth: 40,
-          child: child,
-        ),
-      ),
-    );
-  }
-}
-
-class StyledButtonPainter extends CustomPainter {
-  StyledButtonPainter({
-    required this.baseColor,
-  });
-
-  final Color baseColor;
-
-  @override
-  void paint(Canvas canvas, Size size) {
-    final Color lightColor = baseColor.lighten(20);
-    final Color darkColor = baseColor.darken(20);
-
-    final Paint paint = Paint()..style = PaintingStyle.fill;
-
-    const double cornerRadius = 6;
-
-    Path topPath = Path()
-      ..moveTo(cornerRadius, 0)
-      ..lineTo(size.width - cornerRadius, 0)
-      ..arcToPoint(
-        Offset(size.width, cornerRadius),
-        radius: const Radius.circular(cornerRadius),
-      )
-      ..lineTo(size.width, size.height * .35)
-      ..quadraticBezierTo(
-        size.width * .4,
-        size.height * .1,
-        0,
-        size.height * .3,
-      )
-      ..lineTo(0, cornerRadius)
-      ..arcToPoint(
-        const Offset(cornerRadius, 0),
-        radius: const Radius.circular(cornerRadius),
-      );
-
-    Path bottomPath = Path()
-      ..moveTo(cornerRadius, size.height)
-      ..lineTo(size.width - cornerRadius, size.height)
-      ..arcToPoint(
-        Offset(size.width, size.height - cornerRadius),
-        radius: const Radius.circular(cornerRadius),
-        clockwise: false,
-      )
-      ..lineTo(size.width, size.height * .7)
-      ..quadraticBezierTo(
-        size.width * .6,
-        size.height * .9,
-        0,
-        size.height * .7,
-      )
-      ..lineTo(0, size.height - cornerRadius)
-      ..arcToPoint(
-        Offset(cornerRadius, size.height),
-        radius: const Radius.circular(cornerRadius),
-        clockwise: false,
-      );
-
-    paint.color = lightColor;
-    canvas.drawPath(topPath, paint);
-
-    paint.color = darkColor;
-    canvas.drawPath(bottomPath, paint);
-  }
-
-  @override
-  bool shouldRepaint(CustomPainter oldDelegate) => false;
-}
diff --git a/lib/ui/layouts/game_layout.dart b/lib/ui/layouts/game_layout.dart
index 349f9c241d67edea6675543e659e97b473cef748..0798d0b8cca614dfb7b8036c91585c15efd46950 100644
--- a/lib/ui/layouts/game_layout.dart
+++ b/lib/ui/layouts/game_layout.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/game.dart';
diff --git a/lib/ui/layouts/parameters_layout.dart b/lib/ui/layouts/parameters_layout.dart
index dcb46b68963859294745891612b9d9688ffa8df7..5a16634da4c2bdb932eea9129199f67ed6a123e1 100644
--- a/lib/ui/layouts/parameters_layout.dart
+++ b/lib/ui/layouts/parameters_layout.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/default_game_settings.dart';
 import 'package:sudoku/config/default_global_settings.dart';
diff --git a/lib/ui/parameters/parameter_painter.dart b/lib/ui/parameters/parameter_painter.dart
index 90757c182e7f6e3ddea577af5292a301209b44d8..e83e6fb1aa76a727141fb19bc2fb1e971f036579 100644
--- a/lib/ui/parameters/parameter_painter.dart
+++ b/lib/ui/parameters/parameter_painter.dart
@@ -1,11 +1,11 @@
 import 'dart:math';
 
 import 'package:flutter/material.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/default_game_settings.dart';
 import 'package:sudoku/models/settings/settings_game.dart';
 import 'package:sudoku/models/settings/settings_global.dart';
-import 'package:sudoku/utils/tools.dart';
 
 class ParameterPainter extends CustomPainter {
   const ParameterPainter({
diff --git a/lib/ui/parameters/parameter_widget.dart b/lib/ui/parameters/parameter_widget.dart
index 03d0d171b2a7df73373712a104c05a26a5d1c5fb..09eb967e7afd90a0fb2d4964368f2a193c4c573c 100644
--- a/lib/ui/parameters/parameter_widget.dart
+++ b/lib/ui/parameters/parameter_widget.dart
@@ -1,12 +1,11 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/default_game_settings.dart';
 import 'package:sudoku/config/default_global_settings.dart';
 import 'package:sudoku/models/settings/settings_game.dart';
 import 'package:sudoku/models/settings/settings_global.dart';
-import 'package:sudoku/ui/helpers/styled_button.dart';
 import 'package:sudoku/ui/parameters/parameter_painter.dart';
-import 'package:sudoku/utils/tools.dart';
 
 class ParameterWidget extends StatelessWidget {
   const ParameterWidget({
diff --git a/lib/ui/screens/page_about.dart b/lib/ui/screens/page_about.dart
index f007546869db855ce8f714854307efd1b733fa7f..ab73e304b8138295f6669330b928e0d1d0263565 100644
--- a/lib/ui/screens/page_about.dart
+++ b/lib/ui/screens/page_about.dart
@@ -1,8 +1,5 @@
-import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
-import 'package:package_info_plus/package_info_plus.dart';
-
-import 'package:sudoku/ui/helpers/app_titles.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 class PageAbout extends StatelessWidget {
   const PageAbout({super.key});
diff --git a/lib/ui/screens/page_game.dart b/lib/ui/screens/page_game.dart
index e3a72cde236a4f017b9ab6a72abfce22ba0f03f0..cdd15d84e52574ecb5ccbe1e3fc50aa924044590 100644
--- a/lib/ui/screens/page_game.dart
+++ b/lib/ui/screens/page_game.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/game.dart';
diff --git a/lib/ui/screens/page_settings.dart b/lib/ui/screens/page_settings.dart
index 308e42063b987cc7a00b57f8da4a0d779289e66a..efd7fa5cf17d2564f1a97ce2324b82d3199e3ddf 100644
--- a/lib/ui/screens/page_settings.dart
+++ b/lib/ui/screens/page_settings.dart
@@ -1,6 +1,6 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
-import 'package:sudoku/ui/helpers/app_titles.dart';
 import 'package:sudoku/ui/settings/settings_form.dart';
 
 class PageSettings extends StatelessWidget {
diff --git a/lib/ui/settings/settings_form.dart b/lib/ui/settings/settings_form.dart
index bbde015eed9d2a43e0c1fdc0f4cd24314805920e..6ee0f014747c6575e062a5a4887e76750f457bcb 100644
--- a/lib/ui/settings/settings_form.dart
+++ b/lib/ui/settings/settings_form.dart
@@ -1,6 +1,5 @@
-import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
-import 'package:unicons/unicons.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/ui/settings/theme_card.dart';
 
diff --git a/lib/ui/settings/theme_card.dart b/lib/ui/settings/theme_card.dart
index 39b3d6de49c7445a98b62c08a76948968d986643..6f39e8581bebe0383b4e04bd6d5b3773db251f19 100644
--- a/lib/ui/settings/theme_card.dart
+++ b/lib/ui/settings/theme_card.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/theme_cubit.dart';
 
diff --git a/lib/ui/skeleton.dart b/lib/ui/skeleton.dart
index dc4027b379ff137d67d1b97c423f212526d1b8e6..f235f48d501f7d2dd3a68d638cecbe6ea15acb32 100644
--- a/lib/ui/skeleton.dart
+++ b/lib/ui/skeleton.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/menu.dart';
 import 'package:sudoku/cubit/nav_cubit.dart';
diff --git a/lib/ui/widgets/actions/button_delete_saved_game.dart b/lib/ui/widgets/actions/button_delete_saved_game.dart
index dc9b55283975c8c98214b7e4bcd697693d8c0c8e..dea6d4fa92efb3a66d54eeeef0e2b0b01d729747 100644
--- a/lib/ui/widgets/actions/button_delete_saved_game.dart
+++ b/lib/ui/widgets/actions/button_delete_saved_game.dart
@@ -1,8 +1,7 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
-import 'package:sudoku/ui/helpers/styled_button.dart';
 
 class DeleteSavedGameButton extends StatelessWidget {
   const DeleteSavedGameButton({super.key});
diff --git a/lib/ui/widgets/actions/button_game_quit.dart b/lib/ui/widgets/actions/button_game_quit.dart
index b3b7cfb34ced9c4968762389d1c59808aeeb0627..56d80c9e1c5f37faa5d44589e94bad2131a294ed 100644
--- a/lib/ui/widgets/actions/button_game_quit.dart
+++ b/lib/ui/widgets/actions/button_game_quit.dart
@@ -1,8 +1,7 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
-import 'package:sudoku/ui/helpers/styled_button.dart';
 
 class QuitGameButton extends StatelessWidget {
   const QuitGameButton({super.key});
diff --git a/lib/ui/widgets/actions/button_game_start_new.dart b/lib/ui/widgets/actions/button_game_start_new.dart
index 2b69947ee7a05ef45ee422eaeebc25ddd1591e4c..87ecf843e23c373f14a91bb044e8da4e586e9132 100644
--- a/lib/ui/widgets/actions/button_game_start_new.dart
+++ b/lib/ui/widgets/actions/button_game_start_new.dart
@@ -1,10 +1,9 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/cubit/settings_game_cubit.dart';
 import 'package:sudoku/cubit/settings_global_cubit.dart';
-import 'package:sudoku/ui/helpers/styled_button.dart';
 
 class StartNewGameButton extends StatelessWidget {
   const StartNewGameButton({super.key});
diff --git a/lib/ui/widgets/actions/button_resume_saved_game.dart b/lib/ui/widgets/actions/button_resume_saved_game.dart
index 0ab9f5b30e3328c47217746e34e3656e2d261471..3b45393a362cd63ed7d940aacf9f946c30e74580 100644
--- a/lib/ui/widgets/actions/button_resume_saved_game.dart
+++ b/lib/ui/widgets/actions/button_resume_saved_game.dart
@@ -1,8 +1,7 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
-import 'package:sudoku/ui/helpers/styled_button.dart';
 
 class ResumeSavedGameButton extends StatelessWidget {
   const ResumeSavedGameButton({super.key});
diff --git a/lib/ui/widgets/game/bar_select_cell_value.dart b/lib/ui/widgets/game/bar_select_cell_value.dart
index 875135122c80fa6765da1446e1eaf55451f556a4..be62f999868173b3f393cbef8af68b5c7e0d9a8f 100644
--- a/lib/ui/widgets/game/bar_select_cell_value.dart
+++ b/lib/ui/widgets/game/bar_select_cell_value.dart
@@ -1,7 +1,7 @@
 import 'dart:math';
 
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/cell.dart';
diff --git a/lib/ui/widgets/game/button_show_conflicts.dart b/lib/ui/widgets/game/button_show_conflicts.dart
index e077306aed958f14ac74eb0e171381536b4fa57a..0ba35cf38196892eeb74860135dd6867f891528e 100644
--- a/lib/ui/widgets/game/button_show_conflicts.dart
+++ b/lib/ui/widgets/game/button_show_conflicts.dart
@@ -1,9 +1,8 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/game.dart';
-import 'package:sudoku/ui/helpers/styled_button.dart';
 
 class ButtonShowConflicts extends StatelessWidget {
   const ButtonShowConflicts({super.key});
diff --git a/lib/ui/widgets/game/button_show_tip.dart b/lib/ui/widgets/game/button_show_tip.dart
index ce66b0ab380a8ac0141542410618cda149a50b8f..55dc9044a8c7e40f160b7a142eb1afcc23013bfb 100644
--- a/lib/ui/widgets/game/button_show_tip.dart
+++ b/lib/ui/widgets/game/button_show_tip.dart
@@ -1,11 +1,10 @@
 import 'package:badges/badges.dart' as badges;
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/default_global_settings.dart';
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/game.dart';
-import 'package:sudoku/ui/helpers/styled_button.dart';
 
 class ButtonShowTip extends StatelessWidget {
   const ButtonShowTip({super.key});
diff --git a/lib/ui/widgets/game/cell.dart b/lib/ui/widgets/game/cell.dart
index 2a7c4f9bf83217bbd82c7e042dc8b5e67c60e439..f85f9bbcfb8a45ea88e61c7199750736205b046f 100644
--- a/lib/ui/widgets/game/cell.dart
+++ b/lib/ui/widgets/game/cell.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/cell.dart';
diff --git a/lib/ui/widgets/game/cell_update.dart b/lib/ui/widgets/game/cell_update.dart
index 629829e3a4a4915a339bd7af9539874421fc8786..c4a09d41c6d5613d80762d3f9b2082cd2faa2a8c 100644
--- a/lib/ui/widgets/game/cell_update.dart
+++ b/lib/ui/widgets/game/cell_update.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/cell.dart';
diff --git a/lib/ui/widgets/game/game_board.dart b/lib/ui/widgets/game/game_board.dart
index 559a6c07dd3474b2cecac00f08973e7259fae3bd..de98e555986df1a8255d277c93437e6a67402900 100644
--- a/lib/ui/widgets/game/game_board.dart
+++ b/lib/ui/widgets/game/game_board.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/models/game/cell_location.dart';
diff --git a/lib/ui/widgets/global_app_bar.dart b/lib/ui/widgets/global_app_bar.dart
index 2a168d0808db4a010593c103164a3c0c7b8e0894..d7b499bf0abe773ada40004a7a74ea9edb3ecc2d 100644
--- a/lib/ui/widgets/global_app_bar.dart
+++ b/lib/ui/widgets/global_app_bar.dart
@@ -1,11 +1,10 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_custom_toolbox/flutter_toolbox.dart';
 
 import 'package:sudoku/config/menu.dart';
 import 'package:sudoku/cubit/game_cubit.dart';
 import 'package:sudoku/cubit/nav_cubit.dart';
 import 'package:sudoku/models/game/game.dart';
-import 'package:sudoku/ui/helpers/styled_button.dart';
 
 class GlobalAppBar extends StatelessWidget implements PreferredSizeWidget {
   const GlobalAppBar({super.key});
@@ -38,7 +37,7 @@ class GlobalAppBar extends StatelessWidget implements PreferredSizeWidget {
                 // go to Settings page
                 menuActions.add(ElevatedButton(
                   onPressed: () {
-                    context.read<NavCubit>().goToSettingsPage();
+                    BlocProvider.of<NavCubit>(context).goToSettingsPage();
                   },
                   style: ElevatedButton.styleFrom(
                     shape: const CircleBorder(),
@@ -49,7 +48,7 @@ class GlobalAppBar extends StatelessWidget implements PreferredSizeWidget {
                 // go to About page
                 menuActions.add(ElevatedButton(
                   onPressed: () {
-                    context.read<NavCubit>().goToAboutPage();
+                    BlocProvider.of<NavCubit>(context).goToAboutPage();
                   },
                   style: ElevatedButton.styleFrom(
                     shape: const CircleBorder(),
@@ -60,7 +59,7 @@ class GlobalAppBar extends StatelessWidget implements PreferredSizeWidget {
                 // back to Home page
                 menuActions.add(ElevatedButton(
                   onPressed: () {
-                    context.read<NavCubit>().goToGamePage();
+                    BlocProvider.of<NavCubit>(context).goToGamePage();
                   },
                   style: ElevatedButton.styleFrom(
                     shape: const CircleBorder(),
diff --git a/lib/utils/color_extensions.dart b/lib/utils/color_extensions.dart
deleted file mode 100644
index 4e55e338f0d3ed98b233d1ef887b7b3e17e29d97..0000000000000000000000000000000000000000
--- a/lib/utils/color_extensions.dart
+++ /dev/null
@@ -1,33 +0,0 @@
-import 'dart:ui';
-
-extension ColorExtension on Color {
-  Color darken([int percent = 40]) {
-    assert(1 <= percent && percent <= 100);
-    final value = 1 - percent / 100;
-    return Color.fromARGB(
-      alpha,
-      (red * value).round(),
-      (green * value).round(),
-      (blue * value).round(),
-    );
-  }
-
-  Color lighten([int percent = 40]) {
-    assert(1 <= percent && percent <= 100);
-    final value = percent / 100;
-    return Color.fromARGB(
-      alpha,
-      (red + ((255 - red) * value)).round(),
-      (green + ((255 - green) * value)).round(),
-      (blue + ((255 - blue) * value)).round(),
-    );
-  }
-
-  Color avg(Color other) {
-    final red = (this.red + other.red) ~/ 2;
-    final green = (this.green + other.green) ~/ 2;
-    final blue = (this.blue + other.blue) ~/ 2;
-    final alpha = (this.alpha + other.alpha) ~/ 2;
-    return Color.fromARGB(alpha, red, green, blue);
-  }
-}
diff --git a/lib/utils/tools.dart b/lib/utils/tools.dart
deleted file mode 100644
index fd48b2b009b80b22248d6e7f08a63e96c4065bd7..0000000000000000000000000000000000000000
--- a/lib/utils/tools.dart
+++ /dev/null
@@ -1,7 +0,0 @@
-import 'package:flutter/foundation.dart';
-
-void printlog(String message) {
-  if (!kReleaseMode) {
-    debugPrint(message);
-  }
-}
diff --git a/pubspec.lock b/pubspec.lock
index ab16f391c1fad53f4dd461ba19b69feed987136c..8f63352d983f27575ae3c78f86036c7f336d8dc9 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -5,20 +5,20 @@ packages:
     dependency: transitive
     description:
       name: args
-      sha256: "7cf60b9f0cc88203c5a190b4cd62a99feea42759a7fa695010eb5de1c0b2252a"
+      sha256: bf9f5caeea8d8fe6721a9c358dd8a5c1947b27f1cfaa18b39c301273594919e6
       url: "https://pub.dev"
     source: hosted
-    version: "2.5.0"
+    version: "2.6.0"
   async:
     dependency: transitive
     description:
       name: async
-      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      sha256: d2872f9c19731c2e5f10444b14686eb7cc85c76274bd6c16e1816bff9a3bab63
       url: "https://pub.dev"
     source: hosted
-    version: "2.11.0"
+    version: "2.12.0"
   auto_size_text:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: auto_size_text
       sha256: "3f5261cd3fb5f2a9ab4e2fc3fba84fd9fcaac8821f20a1d4e71f557521b22599"
@@ -69,12 +69,12 @@ packages:
     dependency: transitive
     description:
       name: crypto
-      sha256: ec30d999af904f33454ba22ed9a86162b35e52b44ac4807d1d93c288041d7d27
+      sha256: "1e445881f28f22d6140f181e07737b22f1e099a5e1ff94b0af2f9e4a463f4855"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.5"
+    version: "3.0.6"
   easy_localization:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: easy_localization
       sha256: fa59bcdbbb911a764aa6acf96bbb6fa7a5cf8234354fc45ec1a43a0349ef0201
@@ -90,7 +90,7 @@ packages:
     source: hosted
     version: "0.0.2"
   equatable:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: equatable
       sha256: c2b87cb7756efdf69892005af546c56c0b5037f54d2a88269b4f347a505e3ca2
@@ -119,13 +119,22 @@ packages:
     source: sdk
     version: "0.0.0"
   flutter_bloc:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: flutter_bloc
       sha256: b594505eac31a0518bdcb4b5b79573b8d9117b193cc80cc12e17d639b10aa27a
       url: "https://pub.dev"
     source: hosted
     version: "8.1.6"
+  flutter_custom_toolbox:
+    dependency: "direct main"
+    description:
+      path: "."
+      ref: "0.1.1"
+      resolved-ref: ba7137ca9edec7e503ed3dbfe7f6ede7e9cfbf4d
+      url: "https://git.harrault.fr/android/flutter-toolbox.git"
+    source: git
+    version: "0.1.1"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -145,7 +154,7 @@ packages:
     source: sdk
     version: "0.0.0"
   hive:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: hive
       sha256: "8dcf6db979d7933da8217edcec84e9df1bdb4e4edc7fc77dbd5aa74356d6d941"
@@ -169,7 +178,7 @@ packages:
     source: hosted
     version: "4.0.2"
   hydrated_bloc:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: hydrated_bloc
       sha256: af35b357739fe41728df10bec03aad422cdc725a1e702e03af9d2a41ea05160c
@@ -217,13 +226,13 @@ packages:
     source: hosted
     version: "1.0.0"
   package_info_plus:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: package_info_plus
-      sha256: "894f37107424311bdae3e476552229476777b8752c5a2a2369c0cb9a2d5442ef"
+      sha256: df3eb3e0aed5c1107bb0fdb80a8e82e778114958b1c5ac5644fb1ac9cae8a998
       url: "https://pub.dev"
     source: hosted
-    version: "8.0.3"
+    version: "8.1.0"
   package_info_plus_platform_interface:
     dependency: transitive
     description:
@@ -241,7 +250,7 @@ packages:
     source: hosted
     version: "1.9.0"
   path_provider:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: path_provider
       sha256: fec0d61223fba3154d87759e3cc27fe2c8dc498f6386c6d6fc80d1afdd1bf378
@@ -292,10 +301,10 @@ packages:
     dependency: transitive
     description:
       name: platform
-      sha256: "9b71283fc13df574056616011fb138fd3b793ea47cc509c189a6c3fa5f8a1a65"
+      sha256: "5d6b1b0036a5f331ebc77c850ebc8506cbc1e9416c27e59b439f917a902a4984"
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.5"
+    version: "3.1.6"
   plugin_platform_interface:
     dependency: transitive
     description:
@@ -385,10 +394,10 @@ packages:
     dependency: transitive
     description:
       name: string_scanner
-      sha256: "688af5ed3402a4bde5b3a6c15fd768dbf2621a614950b17f04626c431ab3c4c3"
+      sha256: "0bd04f5bb74fcd6ff0606a888a30e917af9bd52820b178eaa464beb11dca84b6"
       url: "https://pub.dev"
     source: hosted
-    version: "1.3.0"
+    version: "1.4.0"
   synchronized:
     dependency: transitive
     description:
@@ -409,12 +418,12 @@ packages:
     dependency: transitive
     description:
       name: typed_data
-      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
       url: "https://pub.dev"
     source: hosted
-    version: "1.3.2"
+    version: "1.4.0"
   unicons:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: unicons
       sha256: f3eab9d87c226415ef857cfd2167e1d12ad81ea1f5783b46cf644224fea4eab7
@@ -441,10 +450,10 @@ packages:
     dependency: transitive
     description:
       name: win32
-      sha256: "4d45dc9069dba4619dc0ebd93c7cec5e66d8482cb625a370ac806dcc8165f2ec"
+      sha256: "2735daae5150e8b1dfeb3eb0544b4d3af0061e9e82cef063adcd583bdae4306a"
       url: "https://pub.dev"
     source: hosted
-    version: "5.5.5"
+    version: "5.7.0"
   xdg_directories:
     dependency: transitive
     description:
@@ -454,5 +463,5 @@ packages:
     source: hosted
     version: "1.1.0"
 sdks:
-  dart: ">=3.5.0 <4.0.0"
+  dart: ">=3.5.3 <4.0.0"
   flutter: ">=3.24.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 0edbd7d043ac41d813767f63d9f7ad2ea66a95ba..4fcb23ca46338cc8ef6436a7352675fb964093de 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -3,7 +3,7 @@ description: A sudoku game application.
 
 publish_to: "none"
 
-version: 0.3.1+75
+version: 0.4.0+76
 
 environment:
   sdk: "^3.0.0"
@@ -13,15 +13,10 @@ dependencies:
     sdk: flutter
 
   # base
-  auto_size_text: ^3.0.0
-  easy_localization: ^3.0.1
-  equatable: ^2.0.5
-  flutter_bloc: ^8.1.1
-  hive: ^2.2.3
-  hydrated_bloc: ^9.0.0
-  package_info_plus: ^8.0.0
-  path_provider: ^2.0.11
-  unicons: ^3.0.0
+  flutter_custom_toolbox:
+    git:
+      url: https://git.harrault.fr/android/flutter-toolbox.git
+      ref: 0.1.1
 
   # specific
   badges: ^3.1.2
@@ -35,15 +30,3 @@ flutter:
     - assets/skins/
     - assets/translations/
     - assets/ui/
-
-  fonts:
-    - family: Nunito
-      fonts:
-        - asset: assets/fonts/Nunito-Bold.ttf
-          weight: 700
-        - asset: assets/fonts/Nunito-Medium.ttf
-          weight: 500
-        - asset: assets/fonts/Nunito-Regular.ttf
-          weight: 400
-        - asset: assets/fonts/Nunito-Light.ttf
-          weight: 300