From b6e603b2bf77451a86cdd47ffee8c4a9a87d8225 Mon Sep 17 00:00:00 2001
From: Miguel Jacq <mig@mig5.net>
Date: Wed, 12 Nov 2025 10:18:36 +1100
Subject: [PATCH 1/5] Fixes for system dark theme

---
 CHANGELOG.md               |  1 +
 bouquin/settings_dialog.py |  6 ++--
 bouquin/theme.py           | 69 +++++++++++++++++++++++++-------------
 3 files changed, 49 insertions(+), 27 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f26637b..8bcacf5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # 0.2.1.7
 
  * Fix being able to set bold, italic and strikethrough at the same time.
+ * Fixes for system dark theme
  * Add AppImage
 
 # 0.2.1.6
diff --git a/bouquin/settings_dialog.py b/bouquin/settings_dialog.py
index aa90218..3091e14 100644
--- a/bouquin/settings_dialog.py
+++ b/bouquin/settings_dialog.py
@@ -119,7 +119,7 @@ class SettingsDialog(QDialog):
         self.save_key_label.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Minimum)
         # make it look secondary
         pal = self.save_key_label.palette()
-        pal.setColor(self.save_key_label.foregroundRole(), pal.color(QPalette.Mid))
+        self.save_key_label.setForegroundRole(QPalette.PlaceholderText)
         self.save_key_label.setPalette(pal)
 
         exp_row = QHBoxLayout()
@@ -165,7 +165,7 @@ class SettingsDialog(QDialog):
         self.idle_spin_label.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Minimum)
         # make it look secondary
         spal = self.idle_spin_label.palette()
-        spal.setColor(self.idle_spin_label.foregroundRole(), spal.color(QPalette.Mid))
+        self.idle_spin_label.setForegroundRole(QPalette.PlaceholderText)
         self.idle_spin_label.setPalette(spal)
 
         spin_row = QHBoxLayout()
@@ -195,7 +195,7 @@ class SettingsDialog(QDialog):
         self.compact_label.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Minimum)
         # make it look secondary
         cpal = self.compact_label.palette()
-        cpal.setColor(self.compact_label.foregroundRole(), cpal.color(QPalette.Mid))
+        self.compact_label.setForegroundRole(QPalette.PlaceholderText)
         self.compact_label.setPalette(cpal)
 
         maint_row = QHBoxLayout()
diff --git a/bouquin/theme.py b/bouquin/theme.py
index ddd9fa5..1a22d3d 100644
--- a/bouquin/theme.py
+++ b/bouquin/theme.py
@@ -35,6 +35,11 @@ class ThemeManager(QObject):
                 and self.apply(self._cfg.theme)
             )
 
+    def _is_system_dark(self) -> bool:
+        pal = QGuiApplication.palette()
+        # Heuristic: dark windows/backgrounds mean dark system theme
+        return pal.color(QPalette.Window).lightness() < 128
+
     def current(self) -> Theme:
         return self._cfg.theme
 
@@ -43,27 +48,21 @@ class ThemeManager(QObject):
         self.apply(theme)
 
     def apply(self, theme: Theme):
-        # Resolve "system"
+        # Resolve "system" into a concrete theme
+        resolved = theme
         if theme == Theme.SYSTEM:
-            hints = QGuiApplication.styleHints()
-            scheme = getattr(hints, "colorScheme", None)
-            if callable(scheme):
-                scheme = hints.colorScheme()
-            # 0=Light, 1=Dark; fall back to Light
-            theme = Theme.DARK if scheme == 1 else Theme.LIGHT
+            resolved = Theme.DARK if self._is_system_dark() else Theme.LIGHT
 
-        # Always use Fusion so palette applies consistently cross-platform
-        self._app.setStyle("Fusion")
-
-        if theme == Theme.DARK:
+        if resolved == Theme.DARK:
             pal = self._dark_palette()
-            self._app.setPalette(pal)
-            self._app.setStyleSheet("")
         else:
             pal = self._light_palette()
-            self._app.setPalette(pal)
-            self._app.setStyleSheet("")
 
+        # Always use Fusion so palette applies consistently cross-platform
+        QApplication.setStyle("Fusion")
+
+        self._app.setPalette(pal)
+        self._current = resolved
         self.themeChanged.emit(theme)
 
     # ----- Palettes -----
@@ -75,17 +74,24 @@ class ThemeManager(QObject):
         disabled = QColor(127, 127, 127)
         focus = QColor(42, 130, 218)
 
+        # Base surfaces
         pal.setColor(QPalette.Window, window)
-        pal.setColor(QPalette.WindowText, text)
         pal.setColor(QPalette.Base, base)
         pal.setColor(QPalette.AlternateBase, window)
+
+        # Text
+        pal.setColor(QPalette.WindowText, text)
         pal.setColor(QPalette.ToolTipBase, window)
         pal.setColor(QPalette.ToolTipText, text)
         pal.setColor(QPalette.Text, text)
         pal.setColor(QPalette.PlaceholderText, disabled)
-        pal.setColor(QPalette.Button, window)
         pal.setColor(QPalette.ButtonText, text)
+
+        # Buttons/frames
+        pal.setColor(QPalette.Button, window)
         pal.setColor(QPalette.BrightText, QColor(255, 84, 84))
+
+        # Links / selection
         pal.setColor(QPalette.Highlight, focus)
         pal.setColor(QPalette.HighlightedText, QColor(0, 0, 0))
         pal.setColor(QPalette.Link, QColor(Theme.ORANGE_ANCHOR.value))
@@ -94,11 +100,26 @@ class ThemeManager(QObject):
         return pal
 
     def _light_palette(self) -> QPalette:
-        # Let Qt provide its default light palette, but nudge a couple roles
-        pal = self._app.style().standardPalette()
-        pal.setColor(QPalette.Highlight, QColor(0, 120, 215))
-        pal.setColor(QPalette.HighlightedText, QColor(255, 255, 255))
-        pal.setColor(
-            QPalette.Link, QColor("#1a73e8")
-        )  # Light blue for links in light mode
+        pal = QPalette()
+
+        # Base surfaces
+        pal.setColor(QPalette.Window, QColor("#ffffff"))
+        pal.setColor(QPalette.Base, QColor("#ffffff"))
+        pal.setColor(QPalette.AlternateBase, QColor("#f5f5f5"))
+
+        # Text
+        pal.setColor(QPalette.WindowText, QColor("#000000"))
+        pal.setColor(QPalette.Text, QColor("#000000"))
+        pal.setColor(QPalette.ButtonText, QColor("#000000"))
+
+        # Buttons/frames
+        pal.setColor(QPalette.Button, QColor("#f0f0f0"))
+        pal.setColor(QPalette.Mid, QColor("#9e9e9e"))
+
+        # Links / selection
+        pal.setColor(QPalette.Highlight, QColor("#1a73e8"))
+        pal.setColor(QPalette.HighlightedText, QColor("#ffffff"))
+        pal.setColor(QPalette.Link, QColor("#1a73e8"))
+        pal.setColor(QPalette.LinkVisited, QColor("#6b4ca5"))
+
         return pal

From 8d5f8b69519d8f0515bf6e45b0e6a8f7d51c7a98 Mon Sep 17 00:00:00 2001
From: Miguel Jacq <mig@mig5.net>
Date: Wed, 12 Nov 2025 10:21:12 +1100
Subject: [PATCH 2/5] One more fix for code blocks in dark system mode on macOS

---
 bouquin/markdown_highlighter.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bouquin/markdown_highlighter.py b/bouquin/markdown_highlighter.py
index 34c8324..6bbb664 100644
--- a/bouquin/markdown_highlighter.py
+++ b/bouquin/markdown_highlighter.py
@@ -69,7 +69,7 @@ class MarkdownHighlighter(QSyntaxHighlighter):
         else:
             # Light mode: keep the existing light gray
             bg = QColor(245, 245, 245)
-            fg = pal.color(QPalette.Text)
+            fg = pal.color(0, 0, 0) # avoiding using QPalette.Text as it can be white on macOS
         self.code_block_format.setBackground(bg)
         self.code_block_format.setForeground(fg)
 

From 118e19263906c7ea5ee260ba19fc5ed7b3735b03 Mon Sep 17 00:00:00 2001
From: Miguel Jacq <mig@mig5.net>
Date: Wed, 12 Nov 2025 10:21:58 +1100
Subject: [PATCH 3/5] Whoops, QColor

---
 bouquin/markdown_highlighter.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/bouquin/markdown_highlighter.py b/bouquin/markdown_highlighter.py
index 6bbb664..36c6d04 100644
--- a/bouquin/markdown_highlighter.py
+++ b/bouquin/markdown_highlighter.py
@@ -69,7 +69,9 @@ class MarkdownHighlighter(QSyntaxHighlighter):
         else:
             # Light mode: keep the existing light gray
             bg = QColor(245, 245, 245)
-            fg = pal.color(0, 0, 0) # avoiding using QPalette.Text as it can be white on macOS
+            fg = QColor(
+                0, 0, 0
+            )  # avoiding using QPalette.Text as it can be white on macOS
         self.code_block_format.setBackground(bg)
         self.code_block_format.setForeground(fg)
 

From 494b14136b40d1df2cecbdeedc459e862f5f35a3 Mon Sep 17 00:00:00 2001
From: Miguel Jacq <mig@mig5.net>
Date: Wed, 12 Nov 2025 10:51:08 +1100
Subject: [PATCH 4/5] Move lock_overlay/calendar theming to the ThemeManager

---
 bouquin/lock_overlay.py         |  90 +--------------------
 bouquin/main_window.py          |  70 ++--------------
 bouquin/markdown_highlighter.py |   5 +-
 bouquin/theme.py                | 139 +++++++++++++++++++++++++++++++-
 tests/test_lock_overlay.py      |   7 +-
 5 files changed, 154 insertions(+), 157 deletions(-)

diff --git a/bouquin/lock_overlay.py b/bouquin/lock_overlay.py
index 5d7d40a..5534b62 100644
--- a/bouquin/lock_overlay.py
+++ b/bouquin/lock_overlay.py
@@ -1,12 +1,13 @@
 from __future__ import annotations
 
 from PySide6.QtCore import Qt, QEvent
-from PySide6.QtGui import QPalette
 from PySide6.QtWidgets import QWidget, QVBoxLayout, QLabel, QPushButton
 
+from .theme import ThemeManager
+
 
 class LockOverlay(QWidget):
-    def __init__(self, parent: QWidget, on_unlock: callable):
+    def __init__(self, parent: QWidget, on_unlock: callable, themes: ThemeManager):
         """
         Widget that 'locks' the screen after a configured idle time.
         """
@@ -16,7 +17,6 @@ class LockOverlay(QWidget):
         self.setFocusPolicy(Qt.StrongFocus)
         self.setGeometry(parent.rect())
 
-        self._styling = False  # <-- reentrancy guard
         self._last_dark: bool | None = None
 
         lay = QVBoxLayout(self)
@@ -38,91 +38,9 @@ class LockOverlay(QWidget):
         lay.addWidget(self._btn, 0, Qt.AlignCenter)
         lay.addStretch(1)
 
-        self._apply_overlay_style()
+        themes.register_lock_overlay(self)
         self.hide()
 
-    def _is_dark(self, pal: QPalette) -> bool:
-        """
-        Detect if dark mode is in use.
-        """
-        c = pal.color(QPalette.Window)
-        luma = 0.2126 * c.redF() + 0.7152 * c.greenF() + 0.0722 * c.blueF()
-        return luma < 0.5
-
-    def _apply_overlay_style(self):
-        if self._styling:
-            return
-        dark = self._is_dark(self.palette())
-        if dark == self._last_dark:
-            return
-        self._styling = True
-        try:
-            if dark:
-                link = self.palette().color(QPalette.Link)
-                accent_hex = link.name()  # e.g. "#FFA500"
-                r, g, b = link.red(), link.green(), link.blue()
-
-                self.setStyleSheet(
-                    f"""
-#LockOverlay {{ background-color: rgb(0,0,0); }}
-#LockOverlay QLabel#lockLabel {{ color: {accent_hex}; font-weight: 600; }}
-
-#LockOverlay QPushButton#unlockButton {{
-    color: {accent_hex};
-    background-color: rgba({r},{g},{b},0.10);
-    border: 1px solid {accent_hex};
-    border-radius: 8px;
-    padding: 8px 16px;
-}}
-#LockOverlay QPushButton#unlockButton:hover {{
-    background-color: rgba({r},{g},{b},0.16);
-    border-color: {accent_hex};
-}}
-#LockOverlay QPushButton#unlockButton:pressed {{
-    background-color: rgba({r},{g},{b},0.24);
-}}
-#LockOverlay QPushButton#unlockButton:focus {{
-    outline: none;
-    border-color: {accent_hex};
-}}
-    """
-                )
-            else:
-                # (light mode unchanged)
-                self.setStyleSheet(
-                    """
-#LockOverlay { background-color: rgba(0,0,0,120); }
-#LockOverlay QLabel#lockLabel { color: palette(window-text); font-weight: 600; }
-#LockOverlay QPushButton#unlockButton {
-    color: palette(button-text);
-    background-color: rgba(255,255,255,0.92);
-    border: 1px solid rgba(0,0,0,0.25);
-    border-radius: 8px;
-    padding: 8px 16px;
-}
-#LockOverlay QPushButton#unlockButton:hover {
-    background-color: rgba(255,255,255,1.0);
-    border-color: rgba(0,0,0,0.35);
-}
-#LockOverlay QPushButton#unlockButton:pressed {
-    background-color: rgba(245,245,245,1.0);
-}
-#LockOverlay QPushButton#unlockButton:focus {
-    outline: none;
-    border-color: palette(highlight);
-}
-    """
-                )
-            self._last_dark = dark
-        finally:
-            self._styling = False
-
-    def changeEvent(self, ev):
-        super().changeEvent(ev)
-        # Only re-style on palette flips (user changed theme)
-        if ev.type() in (QEvent.PaletteChange, QEvent.ApplicationPaletteChange):
-            self._apply_overlay_style()
-
     def eventFilter(self, obj, event):
         if obj is self.parent() and event.type() in (QEvent.Resize, QEvent.Show):
             self.setGeometry(obj.rect())
diff --git a/bouquin/main_window.py b/bouquin/main_window.py
index 55e5f9a..9c96c5b 100644
--- a/bouquin/main_window.py
+++ b/bouquin/main_window.py
@@ -25,13 +25,11 @@ from PySide6.QtGui import (
     QFont,
     QGuiApplication,
     QKeySequence,
-    QPalette,
     QTextCharFormat,
     QTextCursor,
     QTextListFormat,
 )
 from PySide6.QtWidgets import (
-    QApplication,
     QCalendarWidget,
     QDialog,
     QFileDialog,
@@ -57,7 +55,7 @@ from .search import Search
 from .settings import APP_ORG, APP_NAME, load_db_config, save_db_config
 from .settings_dialog import SettingsDialog
 from .toolbar import ToolBar
-from .theme import Theme, ThemeManager
+from .theme import ThemeManager
 
 
 class MainWindow(QMainWindow):
@@ -87,6 +85,7 @@ class MainWindow(QMainWindow):
         self.calendar.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)
         self.calendar.setGridVisible(True)
         self.calendar.selectionChanged.connect(self._on_date_changed)
+        self.themes.register_calendar(self.calendar)
 
         self.search = Search(self.db)
         self.search.openDateRequested.connect(self._load_selected_date)
@@ -147,7 +146,9 @@ class MainWindow(QMainWindow):
         self._idle_timer.start()
 
         # full-window overlay that sits on top of the central widget
-        self._lock_overlay = LockOverlay(self.centralWidget(), self._on_unlock_clicked)
+        self._lock_overlay = LockOverlay(
+            self.centralWidget(), self._on_unlock_clicked, themes=self.themes
+        )
         self.centralWidget().installEventFilter(self._lock_overlay)
 
         self._locked = False
@@ -278,12 +279,9 @@ class MainWindow(QMainWindow):
         self.settings = QSettings(APP_ORG, APP_NAME)
         self._restore_window_position()
 
-        self._apply_link_css()  # Apply link color on startup
         # re-apply all runtime color tweaks when theme changes
         self.themes.themeChanged.connect(lambda _t: self._retheme_overrides())
-        self.themes.themeChanged.connect(self._apply_calendar_theme)
         self._apply_calendar_text_colors()
-        self._apply_calendar_theme(self.themes.current())
 
         # apply once on startup so links / calendar colors are set immediately
         self._retheme_overrides()
@@ -812,69 +810,11 @@ class MainWindow(QMainWindow):
 
     # ----------------- Some theme helpers -------------------#
     def _retheme_overrides(self):
-        if hasattr(self, "_lock_overlay"):
-            self._lock_overlay._apply_overlay_style()
         self._apply_calendar_text_colors()
-        self._apply_link_css()
         self._apply_search_highlights(getattr(self, "_search_highlighted_dates", set()))
         self.calendar.update()
         self.editor.viewport().update()
 
-    def _apply_link_css(self):
-        if self.themes and self.themes.current() == Theme.DARK:
-            anchor = Theme.ORANGE_ANCHOR.value
-            visited = Theme.ORANGE_ANCHOR_VISITED.value
-            css = f"""
-                a {{ color: {anchor}; text-decoration: underline; }}
-                a:visited {{ color: {visited}; }}
-            """
-        else:
-            css = ""  # Default to no custom styling for links (system or light theme)
-
-        self.editor.document().setDefaultStyleSheet(css)
-
-    def _apply_calendar_theme(self, theme: Theme):
-        """Use orange accents on the calendar in dark mode only."""
-        app_pal = QApplication.instance().palette()
-
-        if theme == Theme.DARK:
-            highlight = QColor(Theme.ORANGE_ANCHOR.value)
-            black = QColor(0, 0, 0)
-
-            highlight_css = Theme.ORANGE_ANCHOR.value
-
-            # Per-widget palette: selection color inside the date grid
-            pal = self.calendar.palette()
-            pal.setColor(QPalette.Highlight, highlight)
-            pal.setColor(QPalette.HighlightedText, black)
-            self.calendar.setPalette(pal)
-
-            # Stylesheet: nav bar + selected-day background
-            self.calendar.setStyleSheet(
-                f"""
-                QWidget#qt_calendar_navigationbar {{ background-color: {highlight_css}; }}
-                QCalendarWidget QToolButton {{ color: black; }}
-                QCalendarWidget QToolButton:hover {{ background-color: rgba(255,165,0,0.20); }}
-                /* Selected day color in the table view */
-                QCalendarWidget QTableView:enabled {{
-                    selection-background-color: {highlight_css};
-                    selection-color: black;
-                }}
-                /* Optional: keep weekday header readable */
-                QCalendarWidget QTableView QHeaderView::section {{
-                    background: transparent;
-                    color: palette(windowText);
-                }}
-            """
-            )
-        else:
-            # Back to app defaults in light/system
-            self.calendar.setPalette(app_pal)
-            self.calendar.setStyleSheet("")
-
-        self._apply_calendar_text_colors()
-        self.calendar.update()
-
     def _apply_calendar_text_colors(self):
         pal = self.palette()
         txt = pal.windowText().color()
diff --git a/bouquin/markdown_highlighter.py b/bouquin/markdown_highlighter.py
index 36c6d04..0c5e7c0 100644
--- a/bouquin/markdown_highlighter.py
+++ b/bouquin/markdown_highlighter.py
@@ -62,7 +62,10 @@ class MarkdownHighlighter(QSyntaxHighlighter):
         self.code_block_format.setFontFixedPitch(True)
 
         pal = QGuiApplication.palette()
-        if self.theme_manager.current() == Theme.DARK:
+        if (
+            self.theme_manager.current() == Theme.DARK
+            or self.theme_manager._is_system_dark
+        ):
             # In dark mode, use a darker panel-like background
             bg = pal.color(QPalette.AlternateBase)
             fg = pal.color(QPalette.Text)
diff --git a/bouquin/theme.py b/bouquin/theme.py
index 1a22d3d..3846398 100644
--- a/bouquin/theme.py
+++ b/bouquin/theme.py
@@ -2,8 +2,9 @@ from __future__ import annotations
 from dataclasses import dataclass
 from enum import Enum
 from PySide6.QtGui import QPalette, QColor, QGuiApplication
-from PySide6.QtWidgets import QApplication
+from PySide6.QtWidgets import QApplication, QCalendarWidget, QWidget
 from PySide6.QtCore import QObject, Signal
+from weakref import WeakSet
 
 
 class Theme(Enum):
@@ -26,6 +27,9 @@ class ThemeManager(QObject):
         super().__init__()
         self._app = app
         self._cfg = cfg
+        self._current = None
+        self._calendars: "WeakSet[QCalendarWidget]" = WeakSet()
+        self._lock_overlays: "WeakSet[QWidget]" = WeakSet()
 
         # Follow OS if supported (Qt 6+)
         hints = QGuiApplication.styleHints()
@@ -40,6 +44,15 @@ class ThemeManager(QObject):
         # Heuristic: dark windows/backgrounds mean dark system theme
         return pal.color(QPalette.Window).lightness() < 128
 
+    def _restyle_registered(self) -> None:
+        for cal in list(self._calendars):
+            if cal is not None:
+                self._apply_calendar_theme(cal)
+
+        for overlay in list(self._lock_overlays):
+            if overlay is not None:
+                self._apply_lock_overlay_theme(overlay)
+
     def current(self) -> Theme:
         return self._cfg.theme
 
@@ -63,7 +76,19 @@ class ThemeManager(QObject):
 
         self._app.setPalette(pal)
         self._current = resolved
-        self.themeChanged.emit(theme)
+        # Re-style any registered widgets
+        self._restyle_registered()
+        self.themeChanged.emit(self._current)
+
+    def register_calendar(self, cal: QCalendarWidget) -> None:
+        """Start theming calendar and keep it in sync with theme changes."""
+        self._calendars.add(cal)
+        self._apply_calendar_theme(cal)
+
+    def register_lock_overlay(self, overlay: QWidget) -> None:
+        """Start theming lock overlay and keep it in sync with theme changes."""
+        self._lock_overlays.add(overlay)
+        self._apply_lock_overlay_theme(overlay)
 
     # ----- Palettes -----
     def _dark_palette(self) -> QPalette:
@@ -123,3 +148,113 @@ class ThemeManager(QObject):
         pal.setColor(QPalette.LinkVisited, QColor("#6b4ca5"))
 
         return pal
+
+    def _apply_calendar_theme(self, cal: QCalendarWidget) -> None:
+        """Use orange accents on the calendar in dark mode only."""
+        app_pal = QApplication.instance().palette()
+        is_dark = (self.current() == Theme.DARK) or (
+            self.current() == Theme.SYSTEM and self._is_system_dark()
+        )
+
+        if is_dark:
+            highlight_css = Theme.ORANGE_ANCHOR.value
+            highlight = QColor(highlight_css)
+            black = QColor(0, 0, 0)
+
+            # Per-widget palette: selection color inside the date grid
+            pal = cal.palette()
+            pal.setColor(QPalette.Highlight, highlight)
+            pal.setColor(QPalette.HighlightedText, black)
+            cal.setPalette(pal)
+
+            # Stylesheet: nav bar + selected-day background
+            cal.setStyleSheet(self._calendar_qss(highlight_css))
+        else:
+            # Back to app defaults in light/system-light
+            cal.setPalette(app_pal)
+            cal.setStyleSheet("")
+
+        cal.update()
+
+    def _calendar_qss(self, highlight_css: str) -> str:
+        return f"""
+        QWidget#qt_calendar_navigationbar {{ background-color: {highlight_css}; }}
+        QCalendarWidget QToolButton {{ color: black; }}
+        QCalendarWidget QToolButton:hover {{ background-color: rgba(255,165,0,0.20); }}
+        /* Selected day color in the table view */
+        QCalendarWidget QTableView:enabled {{
+            selection-background-color: {highlight_css};
+            selection-color: black;
+        }}
+        /* Keep weekday header readable */
+        QCalendarWidget QTableView QHeaderView::section {{
+            background: transparent;
+            color: palette(windowText);
+        }}
+        """
+
+    def _apply_lock_overlay_theme(self, overlay: QWidget) -> None:
+        """
+        Style the LockOverlay (objectName 'LockOverlay') using theme colors.
+        Dark: opaque black bg, orange accent; Light: translucent scrim, palette-driven colors.
+        """
+        pal = QApplication.instance().palette()
+        is_dark = (self.current() == Theme.DARK) or (
+            self.current() == Theme.SYSTEM and self._is_system_dark()
+        )
+
+        if is_dark:
+            # Use the link color as the accent (you set this to ORANGE in dark palette)
+            accent = pal.color(QPalette.Link)
+            r, g, b = accent.red(), accent.green(), accent.blue()
+            accent_hex = accent.name()
+
+            qss = f"""
+#LockOverlay {{ background-color: rgb(0,0,0); }}
+#LockOverlay QLabel#lockLabel {{ color: {accent_hex}; font-weight: 600; }}
+
+#LockOverlay QPushButton#unlockButton {{
+    color: {accent_hex};
+    background-color: rgba({r},{g},{b},0.10);
+    border: 1px solid {accent_hex};
+    border-radius: 8px;
+    padding: 8px 16px;
+}}
+#LockOverlay QPushButton#unlockButton:hover {{
+    background-color: rgba({r},{g},{b},0.16);
+    border-color: {accent_hex};
+}}
+#LockOverlay QPushButton#unlockButton:pressed {{
+    background-color: rgba({r},{g},{b},0.24);
+}}
+#LockOverlay QPushButton#unlockButton:focus {{
+    outline: none;
+    border-color: {accent_hex};
+}}
+"""
+        else:
+            qss = """
+#LockOverlay { background-color: rgba(0,0,0,120); }
+#LockOverlay QLabel#lockLabel { color: palette(window-text); font-weight: 600; }
+
+#LockOverlay QPushButton#unlockButton {
+    color: palette(button-text);
+    background-color: rgba(255,255,255,0.92);
+    border: 1px solid rgba(0,0,0,0.25);
+    border-radius: 8px;
+    padding: 8px 16px;
+}
+#LockOverlay QPushButton#unlockButton:hover {
+    background-color: rgba(255,255,255,1.0);
+    border-color: rgba(0,0,0,0.35);
+}
+#LockOverlay QPushButton#unlockButton:pressed {
+    background-color: rgba(245,245,245,1.0);
+}
+#LockOverlay QPushButton#unlockButton:focus {
+    outline: none;
+    border-color: palette(highlight);
+}
+"""
+        overlay.setStyleSheet(qss)
+        overlay.update()
diff --git a/tests/test_lock_overlay.py b/tests/test_lock_overlay.py
index 7d3ebe8..db6529b 100644
--- a/tests/test_lock_overlay.py
+++ b/tests/test_lock_overlay.py
@@ -2,15 +2,16 @@ import pytest
 from PySide6.QtCore import QEvent
 from PySide6.QtWidgets import QWidget
 from bouquin.lock_overlay import LockOverlay
+from bouquin.theme import ThemeManager, ThemeConfig, Theme
 
 
 @pytest.mark.gui
-def test_lock_overlay_reacts_to_theme(qtbot):
+def test_lock_overlay_reacts_to_theme(app, qtbot):
     host = QWidget()
     qtbot.addWidget(host)
     host.show()
-
-    ol = LockOverlay(host, on_unlock=lambda: None)
+    themes = ThemeManager(app, ThemeConfig(theme=Theme.LIGHT))
+    ol = LockOverlay(host, on_unlock=lambda: None, themes=themes)
     qtbot.addWidget(ol)
     ol.show()
 

From 54a6be835f439911b3f76b0172c39b70635b38f6 Mon Sep 17 00:00:00 2001
From: Miguel Jacq <mig@mig5.net>
Date: Wed, 12 Nov 2025 10:54:42 +1100
Subject: [PATCH 5/5] Bump version

---
 CHANGELOG.md   | 2 +-
 pyproject.toml | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8bcacf5..1012b17 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 # 0.2.1.7
 
  * Fix being able to set bold, italic and strikethrough at the same time.
- * Fixes for system dark theme
+ * Fixes for system dark theme and move stylesheets for Calendar/Lock Overlay into the ThemeManager
  * Add AppImage
 
 # 0.2.1.6
diff --git a/pyproject.toml b/pyproject.toml
index 72a0f00..d88389d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "bouquin"
-version = "0.2.1.6"
+version = "0.2.1.7"
 description = "Bouquin is a simple, opinionated notebook application written in Python, PyQt and SQLCipher."
 authors = ["Miguel Jacq <mig@mig5.net>"]
 readme = "README.md"