Add README, automotive dark theme, and polished GUI

- README.md with full project documentation, architecture, setup guide
- Automotive/industrial dark theme (theme.py) inspired by Vector CANoe
- Dark blue-black background with amber/orange accents
- Styled buttons (green Start, red Stop), orange hover effects
- Custom scrollbars, tooltips, group box titles, tree widget headers
- Updated highlight colors to match theme palette

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

PLAN.md

@@ -190,7 +190,8 @@ LIN_Control_Tool/
 ---
 
 ### Step 8 — Integration & End-to-End
-- **Status:** In progress
+- **Status:** DONE — Python (182 tests) | C++ (124 tests)
+- **Features:** BabyLinBackend wired to GUI, global rate live update, full workflow tests, edge case handling
 - **Goal:** Wire all components together, full workflow testing.
 
 **Features:**

README.md

@@ -0,0 +1,186 @@
+# LIN Simulator
+
+A cross-platform GUI tool for simulating LIN master nodes using **BabyLIN-RC-II** devices by Lipowsky. Built in two parallel implementations — **Python (PyQt6)** and **C++ (Qt6)** — maintained in feature parity.
+
+**Owner:** TeqanyLogix LTD  
+**Developer:** Mohamed Salem
+
+---
+
+## Features
+
+- **LDF Loading** — Parse LIN Description Files, auto-reload on file change
+- **Tx Panel** — Expandable tree view of master frames with editable signal values
+- **Rx Panel** — Real-time slave frame display with timestamps and change highlighting
+- **Bit Packing** — Signal value edits automatically update frame bytes (and vice versa)
+- **Hex/Dec Toggle** — Switch all values between hexadecimal and decimal display
+- **Schedule Tables** — Select and run LDF schedule tables with start/stop/pause
+- **Mock Rx Simulation** — Simulated slave responses for testing without hardware
+- **Connection Panel** — Serial port discovery, connect/disconnect with status indicator
+- **BabyLIN Backend** — Wraps Lipowsky's BabyLIN DLL for hardware communication
+- **Baud Rate Detection** — Automatically extracted from LDF's LIN_speed field
+- **FreeFormat Entries** — Support for raw diagnostic/configuration schedule entries
+- **Automotive Dark Theme** — Industrial UI inspired by Vector CANoe and ETAS INCA
+
+## Screenshots
+
+*(Launch the app and load an LDF to see the automotive dark theme in action)*
+
+## Project Structure
+
+```
+LIN_Control_Tool/
+├── python/                     # Python implementation
+│   ├── src/
+│   │   ├── main.py             # Entry point
+│   │   ├── main_window.py      # GUI layout and logic
+│   │   ├── ldf_handler.py      # LDF parsing adapter (wraps ldfparser)
+│   │   ├── connection_manager.py  # Serial port state machine
+│   │   ├── babylin_backend.py  # BabyLIN DLL wrapper
+│   │   ├── scheduler.py        # QTimer-based schedule execution
+│   │   └── theme.py            # Automotive dark theme stylesheet
+│   ├── tests/                  # pytest test suite (182 tests)
+│   └── requirements.txt
+├── cpp/                        # C++ implementation
+│   ├── src/
+│   │   ├── main.cpp            # Entry point
+│   │   ├── main_window.h/.cpp  # GUI layout and logic
+│   │   ├── ldf_parser.h/.cpp   # Custom LDF parser (regex-based)
+│   │   ├── connection_manager.h/.cpp  # QSerialPort state machine
+│   │   └── scheduler.h/.cpp    # QTimer-based schedule execution
+│   ├── tests/                  # QTest test suite (124 tests)
+│   └── CMakeLists.txt
+├── resources/
+│   ├── sample.ldf              # Sample LIN 2.1 LDF for testing
+│   ├── logo.svg                # Application logo (SVG source)
+│   └── logo.png                # Application logo (512x512 PNG)
+└── docs/                       # Step-by-step documentation
+```
+
+## Quick Start
+
+### Python
+
+```bash
+cd python
+pip install -r requirements.txt
+cd src && python main.py
+```
+
+### C++
+
+```bash
+cd cpp
+mkdir build && cd build
+cmake .. -DCMAKE_PREFIX_PATH=$(brew --prefix qt@6)   # macOS
+# cmake ..                                           # Linux/Windows
+cmake --build .
+./lin_simulator
+```
+
+## Running Tests
+
+### Python (pytest)
+
+```bash
+cd python
+python -m pytest tests/ -v          # all tests
+python -m pytest tests/test_ldf_handler.py -v   # single file
+```
+
+### C++ (QTest / CTest)
+
+```bash
+cd cpp/build
+ctest --output-on-failure -V       # all tests
+./test_main_window                 # single test executable
+```
+
+## Dependencies
+
+### Python
+| Package | Version | Purpose |
+|---------|---------|---------|
+| PyQt6 | >= 6.5.0 | GUI framework |
+| ldfparser | >= 0.25.0 | LDF file parsing |
+| pyserial | >= 3.5 | Serial port communication |
+| pytest | >= 7.0.0 | Test framework |
+
+### C++
+| Library | Purpose |
+|---------|---------|
+| Qt6 Widgets | GUI framework |
+| Qt6 SerialPort | Serial port communication |
+| Qt6 Test | Test framework |
+| CMake >= 3.16 | Build system |
+
+## BabyLIN Hardware Support
+
+The tool communicates with **BabyLIN-RC-II** devices using Lipowsky's official BabyLIN DLL.
+
+| Platform | Status |
+|----------|--------|
+| **Linux** | Full hardware support via `libBabyLIN.so` |
+| **Windows** | Full hardware support via `BabyLIN.dll` |
+| **macOS** | Mock mode (development/testing only — no native DLL) |
+
+### Hardware Setup
+
+1. Install LinWorks from Lipowsky
+2. Compile your LDF into an SDF file using LinWorks
+3. Connect the BabyLIN-RC-II via USB
+4. Launch the LIN Simulator → Refresh → Connect → Load SDF → Start
+
+### Mock Mode
+
+When the BabyLIN DLL is not available, the tool operates in **mock mode**:
+- All GUI features work normally
+- The scheduler generates simulated Rx data
+- Useful for GUI development and testing without hardware
+
+## Architecture
+
+```
+┌─────────────────────────────────────────────────────────────────────┐
+│                         MainWindow (GUI)                            │
+│  ┌──────────┐  ┌──────────────────────────┐  ┌──────────────────┐  │
+│  │Connection│  │  Tx Tree    │  Rx Tree    │  │  Control Bar     │  │
+│  │  Panel   │  │  (editable) │  (live)     │  │  Start/Stop/Pause│  │
+│  └────┬─────┘  └──────┬─────┴──────┬──────┘  └────────┬─────────┘  │
+│       │               │            │                   │            │
+├───────┴───────────────┴────────────┴───────────────────┴────────────┤
+│                       Application Logic                              │
+│  ┌────────────────┐  ┌─────────────┐  ┌────────────────────────┐    │
+│  │ LDF Handler    │  │ Scheduler   │  │ Connection Manager     │    │
+│  │ (parse LDF)    │  │ (QTimer)    │  │ (serial port state)    │    │
+│  └────────────────┘  └──────┬──────┘  └───────────┬────────────┘    │
+│                             │                     │                  │
+├─────────────────────────────┴─────────────────────┴─────────────────┤
+│                       Hardware Layer                                 │
+│  ┌──────────────────────────────────────────────────────────────┐    │
+│  │ BabyLIN Backend (wraps Lipowsky DLL / mock mode)            │    │
+│  │   → libBabyLIN.so (Linux) / BabyLIN.dll (Windows)          │    │
+│  └──────────────────────────────────────────────────────────────┘    │
+└─────────────────────────────────────────────────────────────────────┘
+```
+
+## LDF File Support
+
+The tool parses standard LIN 2.0/2.1 LDF files and extracts:
+- Protocol/language version and baud rate
+- Master and slave node definitions
+- Frame definitions with signal mappings (bit offset, width, initial value)
+- Schedule tables (including FreeFormat diagnostic entries)
+- Node attributes
+
+### Sample LDF
+
+A test LDF (`resources/sample.ldf`) is included with:
+- 1 master node (ECU_Master), 2 slave nodes
+- 4 frames (2 Tx, 2 Rx), 9 signals
+- 2 schedule tables (NormalSchedule, FastSchedule)
+- 19200 baud
+
+## License
+
+Copyright 2026 TeqanyLogix LTD. All rights reserved.

python/src/main.py

@@ -39,8 +39,9 @@ Qt's exit code (0 = normal, non-zero = error).
 import sys
 from pathlib import Path
 from PyQt6.QtWidgets import QApplication
-from PyQt6.QtGui import QIcon
+from PyQt6.QtGui import QIcon, QFont
 from main_window import MainWindow
+from theme import STYLESHEET
 
 
 def main():
@@ -53,12 +54,14 @@ def main():
     app.setApplicationName("LIN Simulator")
     app.setOrganizationName("TeqanyLogix LTD")
 
-    # Set application icon — used in the taskbar, window title bar, and dock.
+    # Set application icon
-    # Path resolves relative to this script's location: src/ → ../../resources/
     icon_path = Path(__file__).parent.parent.parent / "resources" / "logo.png"
     if icon_path.exists():
         app.setWindowIcon(QIcon(str(icon_path)))
 
+    # Apply automotive/industrial dark theme
+    app.setStyleSheet(STYLESHEET)
+
     # Step 2: Create and show the main window.
     # show() makes it visible — without this call, the window exists but is hidden.
     window = MainWindow()

python/src/main_window.py

@@ -127,7 +127,8 @@ Our layout strategy:
 
 The Connection Panel is a QDockWidget — meaning the user can:
   - Drag it to any edge of the window
-  - Undock it to a floating window
+  - Undock it
+  window
   - Close/reopen it from the View menu
 This is useful because during normal operation you might want more
 space for Tx/Rx tables and hide the connection panel.
@@ -593,7 +594,7 @@ class MainWindow(QMainWindow):
 
         # ── Status display ──
         self.lbl_conn_status = QLabel("Status: Disconnected")
-        self.lbl_conn_status.setStyleSheet("color: red; font-weight: bold;")
+        self.lbl_conn_status.setStyleSheet("color: #e74c3c; font-weight: bold;")
         layout.addWidget(self.lbl_conn_status)
 
         # ── Device info ──
@@ -714,7 +715,7 @@ class MainWindow(QMainWindow):
 
         # Permanent connection status on the right side
         self.lbl_status_connection = QLabel("● Disconnected")
-        self.lbl_status_connection.setStyleSheet("color: red;")
+        self.lbl_status_connection.setStyleSheet("color: #e74c3c;")
         status_bar.addPermanentWidget(self.lbl_status_connection)
 
         # Show initial message
@@ -1428,7 +1429,7 @@ class MainWindow(QMainWindow):
             old_val = prev_values.get(sig_info.name)
             if old_val is not None and old_val != value:
                 # Yellow background for changed signals
-                sig_item.setBackground(4, QBrush(QColor(255, 255, 100)))
+                sig_item.setBackground(4, QBrush(QColor(241, 196, 15, 100)))
             else:
                 # Reset background
                 sig_item.setBackground(4, QBrush())
@@ -1593,7 +1594,7 @@ class MainWindow(QMainWindow):
             if item.text(0) == frame_name:
                 # Light blue background for currently transmitting frame
                 for col in range(tree.columnCount()):
-                    item.setBackground(col, QBrush(QColor(173, 216, 230)))
+                    item.setBackground(col, QBrush(QColor(230, 126, 34, 60)))
                 break
 
     def _clear_frame_highlight(self):
@@ -1707,17 +1708,17 @@ class MainWindow(QMainWindow):
 
         if state == ConnectionState.DISCONNECTED:
             self.lbl_conn_status.setText("Status: Disconnected")
-            self.lbl_conn_status.setStyleSheet("color: red; font-weight: bold;")
+            self.lbl_conn_status.setStyleSheet("color: #e74c3c; font-weight: bold;")
             self.btn_connect.setEnabled(True)
             self.btn_disconnect.setEnabled(False)
             self.lbl_device_info.setText("Device Info: —")
             self.lbl_status_connection.setText("● Disconnected")
-            self.lbl_status_connection.setStyleSheet("color: red;")
+            self.lbl_status_connection.setStyleSheet("color: #e74c3c;")
 
         elif state == ConnectionState.CONNECTING:
             self.lbl_conn_status.setText("Status: Connecting...")
             self.lbl_conn_status.setStyleSheet(
-                "color: orange; font-weight: bold;"
+                "color: #e67e22; font-weight: bold;"
             )
             self.btn_connect.setEnabled(False)
             self.btn_disconnect.setEnabled(False)
@@ -1726,7 +1727,7 @@ class MainWindow(QMainWindow):
             port_info = self._conn_mgr.connected_port
             self.lbl_conn_status.setText("Status: Connected")
             self.lbl_conn_status.setStyleSheet(
-                "color: green; font-weight: bold;"
+                "color: #27ae60; font-weight: bold;"
             )
             self.btn_connect.setEnabled(False)
             self.btn_disconnect.setEnabled(True)
@@ -1736,17 +1737,17 @@ class MainWindow(QMainWindow):
                     f"{port_info.description}"
                 )
             self.lbl_status_connection.setText("● Connected")
-            self.lbl_status_connection.setStyleSheet("color: green;")
+            self.lbl_status_connection.setStyleSheet("color: #27ae60;")
 
         elif state == ConnectionState.ERROR:
             self.lbl_conn_status.setText(
                 f"Status: Error\n{self._conn_mgr.error_message}"
             )
-            self.lbl_conn_status.setStyleSheet("color: red; font-weight: bold;")
+            self.lbl_conn_status.setStyleSheet("color: #e74c3c; font-weight: bold;")
             self.btn_connect.setEnabled(True)
             self.btn_disconnect.setEnabled(False)
             self.lbl_status_connection.setText("● Error")
-            self.lbl_status_connection.setStyleSheet("color: red;")
+            self.lbl_status_connection.setStyleSheet("color: #e74c3c;")
 
     # ─── Slot: About ──────────────────────────────────────────────────
 

python/src/theme.py

@@ -0,0 +1,476 @@
+"""
+theme.py — Automotive/Industrial dark theme for the LIN Simulator.
+
+Inspired by Vector CANoe, ETAS INCA, and automotive diagnostic tools.
+Dark background with amber/orange accents for an industrial look.
+
+QT STYLESHEETS:
+===============
+Qt supports CSS-like stylesheets for customizing widget appearance.
+The syntax is similar to web CSS but with Qt-specific selectors:
+
+    QPushButton {              ← applies to ALL QPushButtons
+        background-color: #333;
+        color: white;
+        border-radius: 4px;
+    }
+
+    QPushButton:hover {        ← when mouse hovers over button
+        background-color: #555;
+    }
+
+    QPushButton#myButton {     ← specific widget with objectName "myButton"
+        background-color: red;
+    }
+
+    QTreeWidget::item {        ← items inside the tree widget
+        padding: 4px;
+    }
+
+This is how professional Qt applications get their polished look
+without creating custom paint code for every widget.
+"""
+
+# ── Color Palette ─────────────────────────────────────────────────────
+# Automotive/industrial color scheme
+
+COLORS = {
+    # Base colors
+    "bg_dark":       "#1a1a2e",    # Main background (very dark blue-black)
+    "bg_medium":     "#16213e",    # Panel backgrounds
+    "bg_light":      "#0f3460",    # Lighter panels, selected items
+    "bg_input":      "#1c2541",    # Input field backgrounds
+
+    # Accent colors (amber/orange — automotive instrument cluster feel)
+    "accent":        "#e67e22",    # Primary accent (amber/orange)
+    "accent_hover":  "#f39c12",    # Hover state (brighter amber)
+    "accent_dim":    "#d35400",    # Pressed/active state
+
+    # Status colors
+    "green":         "#27ae60",    # Connected, success
+    "red":           "#e74c3c",    # Disconnected, error
+    "yellow":        "#f1c40f",    # Warning, change highlight
+    "blue":          "#3498db",    # Info, frame highlight
+
+    # Text
+    "text":          "#ecf0f1",    # Primary text (light gray)
+    "text_dim":      "#95a5a6",    # Secondary text (dimmer)
+    "text_dark":     "#2c3e50",    # Text on light backgrounds
+
+    # Borders
+    "border":        "#2c3e50",    # Subtle borders
+    "border_light":  "#34495e",    # Lighter borders
+}
+
+# ── Main Stylesheet ───────────────────────────────────────────────────
+
+STYLESHEET = f"""
+
+/* ─── Global ────────────────────────────────────────────────────── */
+
+QMainWindow {{
+    background-color: {COLORS['bg_dark']};
+}}
+
+QWidget {{
+    background-color: {COLORS['bg_dark']};
+    color: {COLORS['text']};
+    font-family: "Segoe UI", "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
+    font-size: 13px;
+}}
+
+/* ─── Menu Bar ──────────────────────────────────────────────────── */
+
+QMenuBar {{
+    background-color: {COLORS['bg_medium']};
+    color: {COLORS['text']};
+    border-bottom: 1px solid {COLORS['border']};
+    padding: 2px;
+}}
+
+QMenuBar::item {{
+    padding: 6px 12px;
+    border-radius: 4px;
+}}
+
+QMenuBar::item:selected {{
+    background-color: {COLORS['accent']};
+    color: white;
+}}
+
+QMenu {{
+    background-color: {COLORS['bg_medium']};
+    color: {COLORS['text']};
+    border: 1px solid {COLORS['border']};
+    padding: 4px;
+}}
+
+QMenu::item {{
+    padding: 6px 24px;
+    border-radius: 3px;
+}}
+
+QMenu::item:selected {{
+    background-color: {COLORS['accent']};
+    color: white;
+}}
+
+QMenu::separator {{
+    height: 1px;
+    background-color: {COLORS['border']};
+    margin: 4px 8px;
+}}
+
+/* ─── Toolbars ──────────────────────────────────────────────────── */
+
+QToolBar {{
+    background-color: {COLORS['bg_medium']};
+    border: 1px solid {COLORS['border']};
+    padding: 4px;
+    spacing: 6px;
+}}
+
+QToolBar QLabel {{
+    color: {COLORS['text_dim']};
+    font-weight: bold;
+    font-size: 12px;
+}}
+
+QToolBar::separator {{
+    width: 1px;
+    background-color: {COLORS['border_light']};
+    margin: 4px 6px;
+}}
+
+/* ─── Buttons ───────────────────────────────────────────────────── */
+
+QPushButton {{
+    background-color: {COLORS['bg_light']};
+    color: {COLORS['text']};
+    border: 1px solid {COLORS['border_light']};
+    border-radius: 5px;
+    padding: 6px 16px;
+    font-weight: bold;
+    min-height: 24px;
+}}
+
+QPushButton:hover {{
+    background-color: {COLORS['accent']};
+    border-color: {COLORS['accent']};
+    color: white;
+}}
+
+QPushButton:pressed {{
+    background-color: {COLORS['accent_dim']};
+}}
+
+QPushButton:disabled {{
+    background-color: {COLORS['bg_dark']};
+    color: {COLORS['text_dim']};
+    border-color: {COLORS['border']};
+}}
+
+/* Start button — green accent */
+QPushButton[text*="Start"] {{
+    background-color: {COLORS['green']};
+    color: white;
+    border-color: {COLORS['green']};
+}}
+
+QPushButton[text*="Start"]:hover {{
+    background-color: #2ecc71;
+}}
+
+QPushButton[text*="Start"]:disabled {{
+    background-color: {COLORS['bg_dark']};
+    color: {COLORS['text_dim']};
+    border-color: {COLORS['border']};
+}}
+
+/* Stop button — red accent */
+QPushButton[text*="Stop"] {{
+    background-color: {COLORS['red']};
+    color: white;
+    border-color: {COLORS['red']};
+}}
+
+QPushButton[text*="Stop"]:hover {{
+    background-color: #c0392b;
+}}
+
+QPushButton[text*="Stop"]:disabled {{
+    background-color: {COLORS['bg_dark']};
+    color: {COLORS['text_dim']};
+    border-color: {COLORS['border']};
+}}
+
+/* ─── Input Fields ──────────────────────────────────────────────── */
+
+QLineEdit {{
+    background-color: {COLORS['bg_input']};
+    color: {COLORS['text']};
+    border: 1px solid {COLORS['border_light']};
+    border-radius: 4px;
+    padding: 5px 8px;
+    selection-background-color: {COLORS['accent']};
+}}
+
+QLineEdit:read-only {{
+    background-color: {COLORS['bg_dark']};
+    color: {COLORS['text_dim']};
+}}
+
+QSpinBox {{
+    background-color: {COLORS['bg_input']};
+    color: {COLORS['accent']};
+    border: 1px solid {COLORS['border_light']};
+    border-radius: 4px;
+    padding: 4px 8px;
+    font-weight: bold;
+    font-size: 14px;
+}}
+
+QSpinBox::up-button, QSpinBox::down-button {{
+    background-color: {COLORS['bg_light']};
+    border: none;
+    width: 20px;
+}}
+
+QSpinBox::up-button:hover, QSpinBox::down-button:hover {{
+    background-color: {COLORS['accent']};
+}}
+
+/* ─── Combo Boxes ───────────────────────────────────────────────── */
+
+QComboBox {{
+    background-color: {COLORS['bg_input']};
+    color: {COLORS['text']};
+    border: 1px solid {COLORS['border_light']};
+    border-radius: 4px;
+    padding: 5px 8px;
+    min-height: 24px;
+}}
+
+QComboBox:hover {{
+    border-color: {COLORS['accent']};
+}}
+
+QComboBox::drop-down {{
+    background-color: {COLORS['bg_light']};
+    border: none;
+    width: 24px;
+    border-top-right-radius: 4px;
+    border-bottom-right-radius: 4px;
+}}
+
+QComboBox QAbstractItemView {{
+    background-color: {COLORS['bg_medium']};
+    color: {COLORS['text']};
+    border: 1px solid {COLORS['border']};
+    selection-background-color: {COLORS['accent']};
+    selection-color: white;
+}}
+
+/* ─── Check Boxes ───────────────────────────────────────────────── */
+
+QCheckBox {{
+    color: {COLORS['text']};
+    spacing: 6px;
+}}
+
+QCheckBox::indicator {{
+    width: 18px;
+    height: 18px;
+    border: 2px solid {COLORS['border_light']};
+    border-radius: 3px;
+    background-color: {COLORS['bg_input']};
+}}
+
+QCheckBox::indicator:checked {{
+    background-color: {COLORS['accent']};
+    border-color: {COLORS['accent']};
+}}
+
+QCheckBox::indicator:hover {{
+    border-color: {COLORS['accent']};
+}}
+
+/* ─── Group Boxes ───────────────────────────────────────────────── */
+
+QGroupBox {{
+    background-color: {COLORS['bg_medium']};
+    border: 1px solid {COLORS['border']};
+    border-radius: 6px;
+    margin-top: 12px;
+    padding-top: 16px;
+    font-weight: bold;
+    font-size: 13px;
+}}
+
+QGroupBox::title {{
+    subcontrol-origin: margin;
+    subcontrol-position: top left;
+    padding: 4px 12px;
+    background-color: {COLORS['accent']};
+    color: white;
+    border-radius: 4px;
+    margin-left: 8px;
+}}
+
+/* ─── Tree Widget (Tx/Rx Tables) ────────────────────────────────── */
+
+QTreeWidget {{
+    background-color: {COLORS['bg_dark']};
+    alternate-background-color: {COLORS['bg_medium']};
+    color: {COLORS['text']};
+    border: 1px solid {COLORS['border']};
+    border-radius: 4px;
+    gridline-color: {COLORS['border']};
+    outline: none;
+}}
+
+QTreeWidget::item {{
+    padding: 4px 2px;
+    border-bottom: 1px solid {COLORS['border']};
+    min-height: 24px;
+}}
+
+QTreeWidget::item:selected {{
+    background-color: {COLORS['bg_light']};
+    color: {COLORS['accent']};
+}}
+
+QTreeWidget::item:hover {{
+    background-color: rgba(230, 126, 34, 0.15);
+}}
+
+QTreeWidget::branch {{
+    background-color: transparent;
+}}
+
+/* Header for tree/table */
+QHeaderView::section {{
+    background-color: {COLORS['bg_medium']};
+    color: {COLORS['accent']};
+    border: 1px solid {COLORS['border']};
+    padding: 6px 8px;
+    font-weight: bold;
+    font-size: 12px;
+    text-transform: uppercase;
+}}
+
+/* ─── Dock Widget ───────────────────────────────────────────────── */
+
+QDockWidget {{
+    color: {COLORS['text']};
+    font-weight: bold;
+    titlebar-close-icon: none;
+}}
+
+QDockWidget::title {{
+    background-color: {COLORS['accent']};
+    color: white;
+    padding: 8px;
+    border-radius: 0px;
+    font-size: 13px;
+}}
+
+QDockWidget > QWidget {{
+    background-color: {COLORS['bg_medium']};
+    border: 1px solid {COLORS['border']};
+}}
+
+/* ─── Status Bar ────────────────────────────────────────────────── */
+
+QStatusBar {{
+    background-color: {COLORS['bg_medium']};
+    color: {COLORS['text_dim']};
+    border-top: 1px solid {COLORS['border']};
+    font-size: 12px;
+    padding: 2px;
+}}
+
+QStatusBar QLabel {{
+    font-weight: bold;
+    padding: 2px 8px;
+}}
+
+/* ─── Scroll Bars ───────────────────────────────────────────────── */
+
+QScrollBar:vertical {{
+    background-color: {COLORS['bg_dark']};
+    width: 10px;
+    border: none;
+}}
+
+QScrollBar::handle:vertical {{
+    background-color: {COLORS['border_light']};
+    border-radius: 5px;
+    min-height: 30px;
+}}
+
+QScrollBar::handle:vertical:hover {{
+    background-color: {COLORS['accent']};
+}}
+
+QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {{
+    height: 0px;
+}}
+
+QScrollBar:horizontal {{
+    background-color: {COLORS['bg_dark']};
+    height: 10px;
+    border: none;
+}}
+
+QScrollBar::handle:horizontal {{
+    background-color: {COLORS['border_light']};
+    border-radius: 5px;
+    min-width: 30px;
+}}
+
+QScrollBar::handle:horizontal:hover {{
+    background-color: {COLORS['accent']};
+}}
+
+QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal {{
+    width: 0px;
+}}
+
+/* ─── Tooltips ──────────────────────────────────────────────────── */
+
+QToolTip {{
+    background-color: {COLORS['bg_medium']};
+    color: {COLORS['text']};
+    border: 1px solid {COLORS['accent']};
+    border-radius: 4px;
+    padding: 6px;
+    font-size: 12px;
+}}
+
+/* ─── Message Boxes ─────────────────────────────────────────────── */
+
+QMessageBox {{
+    background-color: {COLORS['bg_medium']};
+}}
+
+QMessageBox QLabel {{
+    color: {COLORS['text']};
+}}
+
+QMessageBox QPushButton {{
+    min-width: 80px;
+}}
+
+/* ─── Splitter ──────────────────────────────────────────────────── */
+
+QSplitter::handle {{
+    background-color: {COLORS['border']};
+    height: 3px;
+}}
+
+QSplitter::handle:hover {{
+    background-color: {COLORS['accent']};
+}}
+
+"""

python/tests/test_rx_realtime.py

@@ -101,9 +101,9 @@ class TestChangeHighlighting:
         frame_item = window.rx_table.topLevelItem(0)
         temp_sig = frame_item.child(1)  # MotorTemp changed: 0x10 → 0x20
         bg = temp_sig.background(4)
-        # Should be yellow (255, 255, 100)
+        # Should be highlighted (amber/yellow with alpha)
-        assert bg.color().red() == 255
+        assert bg.color().red() > 200
-        assert bg.color().green() == 255
+        assert bg.color().green() > 150
 
     def test_unchanged_signal_not_highlighted(self, window):
         """Signal that didn't change should not be highlighted."""