added settings with 10 themes, light mode and czech/english UI

.idea/.gitignore

@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

Makefile

@@ -1,6 +1,21 @@
 CC = gcc
-CFLAGS = -Wall -Wextra -Wno-deprecated-declarations `pkg-config --cflags gtk4`
-LIBS = `pkg-config --libs gtk4` -lm
+
+# Make sure pkg-config is found even when make runs with a minimal PATH
+# (e.g. launched from an IDE such as CLion on macOS).
+PKG_CONFIG ?= $(firstword $(wildcard \
+	$(addsuffix /pkg-config,$(subst :, ,$(PATH)) /opt/homebrew/bin /usr/local/bin)))
+ifeq ($(PKG_CONFIG),)
+PKG_CONFIG := pkg-config
+endif
+
+# Use $(shell ...) instead of backticks so the flags are expanded by make
+# itself; IDEs that import the Makefile via a dry run then see the real
+# include paths.
+GTK_CFLAGS := $(shell $(PKG_CONFIG) --cflags gtk4)
+GTK_LIBS   := $(shell $(PKG_CONFIG) --libs gtk4)
+
+CFLAGS = -Wall -Wextra -Wno-deprecated-declarations $(GTK_CFLAGS)
+LIBS = $(GTK_LIBS) -lm
 TARGET = sprechen
 SRC = sprechen.c
 

README.md

@@ -5,30 +5,35 @@ A German learning application written in C using GTK 4.
 ## Description
 
 Sprechen.c is an educational program designed for practicing German language
-skills, aimed at high school and gymnasium students. The UI is written in Czech
-and is built as a single C file (`sprechen.c`) that renders a modern,
-CSS-styled GTK 4 interface with a Catppuccin Mocha dark theme.
+skills, aimed at high school and gymnasium students. The UI is available in
+Czech and English and is built as a single C file (`sprechen.c`) that renders a
+modern, CSS-styled GTK 4 interface.
 
 ## Features
 
 - **Welcome screen** – branded greeting with a description of the program and a
-  "Pokračuj" button to get started
-- **Learning roadmap** – a wave-shaped "Učební plán" path with 10 units that
-  scrolls horizontally
+  continue button to get started
+- **Learning roadmap** – adaptive serpentine learning path with 10 units
   - each unit numbered and labeled with its topic (e.g. "Neue Freunde")
-  - current unit highlighted with a mauve→blue gradient and glow
+  - current unit highlighted with an accent gradient and glow
   - completed units shown in green with a checkmark
   - locked units dimmed with a lock icon
-  - finish flag at the end of the path
+  - finish node at the end of the path
+  - layout folds into multiple rows when the window is narrow
 - **Back navigation** – themed circular back button (top-left) returns to the
-  welcome screen
+  previous screen
 - **Unit 1 exercises** – "Neue Freunde" opens an interactive bubble map with 13
-  exercises (dialogs, sentence building, numbers, verb conjugation, greeting
-  sorting and more), each with German prompts and a "Zkontrolovat" check
+  exercises (dialogs, sentence building, multiple choice, free answers,
+  numbers, verb conjugation, greeting sorting and more), each with German
+  prompts and a check button that reveals the translations
 - **Progress tracking** – completed exercises are marked green; progress is
   saved to `progress/unit1.conf` and restored on startup
-- **Catppuccin Mocha theme** – gradient background, rounded cards, glowing
-  buttons and nodes, all driven by an embedded CSS stylesheet
+- **Settings** – gear icon in the top-right header opens a panel where you can
+  choose:
+  - **mode**: dark or light, as a segmented control
+  - **theme**: 10 palettes picked from a grid of color swatches
+  - **language**: Czech or English, applied instantly without a restart
+  - all three preferences are stored in `progress/settings.conf`
 - **Keyboard quit shortcuts** – `Super/Cmd+Q` or `Alt+F4` closes the app
 - Single-file C codebase, cross-platform (Linux and macOS supported)
 
@@ -124,13 +129,15 @@ or
 
 When launched, the application shows the welcome screen. From there:
 
-1. Click **"Pokračuj"** to open the learning roadmap.
-2. Browse the units along the path; the roadmap scrolls horizontally if the
-   window is too narrow.
+1. Click **"Pokračuj" / "Continue"** to open the learning roadmap.
+2. Browse the units along the path; the roadmap reflows into rows and scrolls
+   if the window is too narrow.
 3. Click the **"Neue Freunde"** node to open the unit's exercise map, then pick
    any bubble to start an exercise.
 4. Use the **back button** in the top-left corner to return to the previous
    screen.
+5. Open **Nastavení / Settings** (gear icon, top-right) to switch dark/light
+   mode, pick a color theme, or change the interface language.
 
 Only the first unit is currently implemented. Locked units do nothing – they
 are placeholders until lessons are added. Completed exercises stay green and
@@ -138,26 +145,46 @@ are saved to `progress/unit1.conf` (created next to the app on first finish).
 
 ### Keyboard shortcuts
 
-| Shortcut            | Action          |
-| ------------------- | --------------- |
+| Shortcut            | Action           |
+| ------------------- | ---------------- |
 | `Super/Cmd` + `Q`   | Quit application |
 | `Alt` + `F4`        | Quit application |
 
 ## Project structure
 
 ```
-sprechen.c          entire application (UI, navigation, path drawing, styling)
-Makefile            build & run targets
-README.md           this file
-LICENSE             MIT license
+sprechen.c              entire application (UI, navigation, themes, exercises)
+Makefile                build & run targets
+README.md               this file
+LICENSE                 MIT license
+progress/               created at runtime
+  unit1.conf            exercise completion state
+  settings.conf         theme, dark/light mode and language preference
 ```
 
 ## Theming
 
-Colors follow the [Catppuccin Mocha](https://github.com/catppuccin/catppuccin)
-palette and are applied through a CSS string embedded at the top of
-`sprechen.c`. To tweak the look (colors, node glow, gradients, spacing), edit
-that stylesheet and rebuild.
+The app ships with ten palettes – Catppuccin, Nord, Dracula, Rose Pine, Ocean,
+Gruvbox, Solarized, Everforest, Monokai and One Dark – each available in dark
+and light mode. Colors are defined as theme palettes in `sprechen.c` and
+applied through a generated CSS stylesheet (plus matching Cairo colors for the
+roadmap rails and icons).
+
+Change the look from the in-app settings panel, or edit the palette tables /
+`build_theme_css()` in `sprechen.c` and rebuild.
+
+## Languages
+
+The interface can be switched between Czech and English from the settings
+panel; the choice takes effect immediately and is remembered between runs.
+Translations live in two tables in `sprechen.c`: `tr_ui` holds interface
+strings under short keys, while `tr_content` translates the Czech meanings
+shown next to the German exercise items and uses the Czech text itself as the
+key. Widgets are registered with `i18n_bind()` so `apply_language()` can
+retranslate them in place.
+
+German prompts, unit names and exercise titles are learning material and stay
+German in both languages.
 
 ## To-Do Plans
 
@@ -167,14 +194,15 @@ Future enhancements planned for Sprechen.c:
   - [x] Unit 1 ("Neue Freunde") – 13 interactive exercises with progress saving
 - [ ] Lesson progression and unlock system for the remaining units
 - [ ] Add audio pronunciation features
-- [ ] Add user settings panel
+- [x] Add user settings panel (theme, dark/light mode, language)
 - [ ] Implement spaced repetition system for vocabulary
 - [ ] Add listening and reading comprehension exercises
 - [ ] Add writing practice with feedback
-- [ ] Implement progress tracking and statistics
+- [ ] Expand progress tracking with statistics
 - [ ] Move CSS styling to an external file
 - [ ] Split the UI code into multiple files
-- [ ] Add internationalization support (gettext)
+- [x] Add internationalization support (Czech and English)
+- [ ] Add more interface languages
 - [ ] Add unit testing framework
 
 ## License