Polish GUI design

python_app/gui/theme.py

@@ -5,23 +5,15 @@ from __future__ import annotations
 from PyQt6.QtGui import QColor, QPalette
 from PyQt6.QtWidgets import QApplication, QStyleFactory
 
+PLOT_BACKGROUND = "#0f141c"
 
 _LIGHT_STYLESHEET = """
-QMainWindow, QDialog {
-    background-color: #f3f6fb;
-}
-
-QWidget {
-    color: #1f2937;
-    font-size: 13px;
-}
-
 QGroupBox {
     background-color: #ffffff;
     border: 1px solid #d7dee8;
-    border-radius: 10px;
-    margin-top: 14px;
-    padding: 10px;
+    border-radius: 6px;
+    margin-top: 12px;
+    padding: 6px;
 }
 
 QGroupBox::title {
@@ -35,11 +27,11 @@ QGroupBox::title {
 QPushButton {
     background-color: #f8fafc;
     border: 1px solid #cad4e1;
-    border-radius: 8px;
-    padding: 7px 12px;
+    border-radius: 4px;
+    padding: 3px 10px;
 }
 
-QPushButton:hover {
+QPushButton:hover:enabled {
     background-color: #eef3f9;
 }
 
@@ -47,70 +39,30 @@ QPushButton:pressed {
     background-color: #e4ebf4;
 }
 
-QPushButton:checked {
+QPushButton:checked, QPushButton[role="primary"] {
     background-color: #2f7ee6;
     border-color: #2f7ee6;
     color: #ffffff;
 }
 
-QPushButton:checked:hover {
+QPushButton:checked:hover:enabled, QPushButton[role="primary"]:hover:enabled {
     background-color: #3b8bf4;
 }
 
+QPushButton[role="destructive"] {
+    color: #a73545;
+    border-color: #cf9ba4;
+}
+
 QPushButton:disabled {
     color: #98a4b3;
     background-color: #f3f5f8;
     border-color: #dde4ec;
 }
 
-QPushButton#settingsToggleButton {
-    min-width: 26px;
-    max-width: 26px;
-    padding: 6px 0px;
-    border-radius: 7px;
-    font-weight: 700;
-}
-
-QPushButton#sectionToggleButton {
-    min-width: 84px;
-    padding: 5px 10px;
-    border-radius: 7px;
-}
-
-QLineEdit,
-QPlainTextEdit,
-QTextEdit,
-QComboBox,
-QSpinBox,
-QDoubleSpinBox {
-    background-color: #ffffff;
-    border: 1px solid #c9d4e1;
-    border-radius: 7px;
-    padding: 5px 8px;
-    selection-background-color: #cfe3ff;
-}
-
-QLineEdit:focus,
-QPlainTextEdit:focus,
-QTextEdit:focus,
-QComboBox:focus,
-QSpinBox:focus,
-QDoubleSpinBox:focus {
-    border: 1px solid #2f7ee6;
-}
-
 QTextEdit#runtimeLogBox {
     font-family: "DejaVu Sans Mono";
     font-size: 12px;
-    padding: 6px 8px;
-    color: #1f2937;
-    background-color: #fbfdff;
-    border-color: #c9d4e1;
-}
-
-QComboBox::drop-down {
-    border: none;
-    width: 18px;
 }
 
 QScrollArea {
@@ -121,7 +73,6 @@ QScrollArea {
 QLabel#statusLabel {
     color: #35507a;
     font-weight: 600;
-    padding: 2px 1px;
 }
 
 QLabel#hintLabel {
@@ -133,6 +84,9 @@ QLabel#hintLabel {
 def apply_light_theme(app: QApplication) -> None:
     """Apply a minimal light theme shared by all windows."""
     app.setStyle(QStyleFactory.create("Fusion"))
+    font = app.font()
+    font.setPointSize(10)
+    app.setFont(font)
 
     palette = QPalette()
     palette.setColor(QPalette.ColorRole.Window, QColor("#f3f6fb"))
@@ -148,5 +102,8 @@ def apply_light_theme(app: QApplication) -> None:
     palette.setColor(QPalette.ColorRole.Link, QColor("#2f7ee6"))
     palette.setColor(QPalette.ColorRole.Highlight, QColor("#2f7ee6"))
     palette.setColor(QPalette.ColorRole.HighlightedText, QColor("#ffffff"))
+    for role in (QPalette.ColorRole.Text, QPalette.ColorRole.ButtonText, QPalette.ColorRole.WindowText):
+        palette.setColor(QPalette.ColorGroup.Disabled, role, QColor("#98a4b3"))
+    palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Base, QColor("#f3f5f8"))
     app.setPalette(palette)
     app.setStyleSheet(_LIGHT_STYLESHEET)