diff --git a/src-tauri/capabilities/log-app-window.json b/src-tauri/capabilities/log-app-window.json
index 9f95d1bb9..97dbf952d 100644
--- a/src-tauri/capabilities/log-app-window.json
+++ b/src-tauri/capabilities/log-app-window.json
@@ -3,10 +3,13 @@
   "identifier": "logs-app-window",
   "description": "enables permissions for the logs app window",
   "windows": ["logs-app-window"],
+  "platforms": ["linux", "macOS", "windows"],
   "permissions": [
     "core:default",
     "core:window:allow-start-dragging",
     "core:window:allow-set-theme",
+    "core:window:allow-get-all-windows",
+    "core:event:allow-listen",
     "log:default",
     "core:webview:allow-create-webview-window",
     "core:window:allow-set-focus"
diff --git a/src-tauri/capabilities/logs-window.json b/src-tauri/capabilities/logs-window.json
index ef56e6f75..34b1e033a 100644
--- a/src-tauri/capabilities/logs-window.json
+++ b/src-tauri/capabilities/logs-window.json
@@ -3,10 +3,13 @@
   "identifier": "logs-window",
   "description": "enables permissions for the logs window",
   "windows": ["logs-window-local-api-server"],
+  "platforms": ["linux", "macOS", "windows"],
   "permissions": [
     "core:default",
     "core:window:allow-start-dragging",
     "core:window:allow-set-theme",
+    "core:window:allow-get-all-windows",
+    "core:event:allow-listen",
     "log:default",
     "core:webview:allow-create-webview-window",
     "core:window:allow-set-focus"
diff --git a/src-tauri/capabilities/system-monitor-window.json b/src-tauri/capabilities/system-monitor-window.json
index 68a75e9fb..75a26fd87 100644
--- a/src-tauri/capabilities/system-monitor-window.json
+++ b/src-tauri/capabilities/system-monitor-window.json
@@ -8,6 +8,8 @@
     "core:default",
     "core:window:allow-start-dragging",
     "core:window:allow-set-theme",
+    "core:window:allow-get-all-windows",
+    "core:event:allow-listen",
     "log:default",
     "core:webview:allow-create-webview-window",
     "core:window:allow-set-focus",
@@ -15,6 +17,18 @@
     "hardware:allow-get-system-usage",
     "llamacpp:allow-get-devices",
     "llamacpp:allow-read-gguf-metadata",
-    "deep-link:allow-get-current"
+    "deep-link:allow-get-current",
+    {
+      "identifier": "http:default",
+      "allow": [
+        {
+          "url": "https://*:*"
+        },
+        {
+          "url": "http://*:*"
+        }
+      ],
+      "deny": []
+    }
   ]
 }
diff --git a/src-tauri/src/core/setup.rs b/src-tauri/src/core/setup.rs
index 6564d3609..7ba8f2f74 100644
--- a/src-tauri/src/core/setup.rs
+++ b/src-tauri/src/core/setup.rs
@@ -7,7 +7,7 @@ use std::{
 };
 use tar::Archive;
 use tauri::{
-    App, Emitter, Manager, Runtime, Wry
+    App, Emitter, Manager, Runtime, Wry, WindowEvent
 };
 
 #[cfg(desktop)]
@@ -270,3 +270,32 @@ pub fn setup_tray(app: &App) -> tauri::Result<TrayIcon> {
         })
         .build(app)
 }
+
+pub fn setup_theme_listener<R: Runtime>(app: &App<R>) -> tauri::Result<()> {
+    // Setup theme listener for main window
+    if let Some(window) = app.get_webview_window("main") {
+        setup_window_theme_listener(app.handle().clone(), window);
+    }
+
+    Ok(())
+}
+
+fn setup_window_theme_listener<R: Runtime>(
+    app_handle: tauri::AppHandle<R>,
+    window: tauri::WebviewWindow<R>,
+) {
+    let window_label = window.label().to_string();
+    let app_handle_clone = app_handle.clone();
+
+    window.on_window_event(move |event| {
+        if let WindowEvent::ThemeChanged(theme) = event {
+            let theme_str = match theme {
+                tauri::Theme::Light => "light",
+                tauri::Theme::Dark => "dark",
+                _ => "auto",
+            };
+            log::info!("System theme changed to: {} for window: {}", theme_str, window_label);
+            let _ = app_handle_clone.emit("theme-changed", theme_str);
+        }
+    });
+}
diff --git a/src-tauri/src/core/system/commands.rs b/src-tauri/src/core/system/commands.rs
index 938e6f8bf..e01c36854 100644
--- a/src-tauri/src/core/system/commands.rs
+++ b/src-tauri/src/core/system/commands.rs
@@ -117,3 +117,108 @@ pub fn is_library_available(library: &str) -> bool {
         }
     }
 }
+
+// Check if the system supports blur/acrylic effects
+// - Windows: Checks build version (17134+ for acrylic support)
+// - Linux: Checks for KWin (KDE) or compositor with blur support
+// - macOS: Always supported
+#[tauri::command]
+pub fn supports_blur_effects() -> bool {
+    #[cfg(target_os = "windows")]
+    {
+        // Windows 10 build 17134 (1803) and later support acrylic effects
+        // Windows 11 (build 22000+) has better support
+        use std::process::Command;
+
+        if let Ok(output) = Command::new("cmd")
+            .args(&["/C", "ver"])
+            .output()
+        {
+            if let Ok(version_str) = String::from_utf8(output.stdout) {
+                // Parse Windows version from output like "Microsoft Windows [Version 10.0.22631.4602]"
+                if let Some(version_part) = version_str.split("Version ").nth(1) {
+                    if let Some(build_str) = version_part.split('.').nth(2) {
+                        if let Ok(build) = build_str.split(']').next().unwrap_or("0").trim().parse::<u32>() {
+                            // Windows 10 build 17134+ or Windows 11 build 22000+ support blur
+                            let supports_blur = build >= 17134;
+                            if supports_blur {
+                                log::info!("✅ Windows build {} detected - Blur/Acrylic effects SUPPORTED", build);
+                            } else {
+                                log::warn!("❌ Windows build {} detected - Blur/Acrylic effects NOT SUPPORTED (requires build 17134+)", build);
+                            }
+                            return supports_blur;
+                        }
+                    }
+                }
+            }
+        }
+
+        // If we can't detect version, assume it doesn't support blur for safety
+        log::warn!("❌ Could not detect Windows version - Assuming NO blur support for safety");
+        false
+    }
+
+    #[cfg(target_os = "linux")]
+    {
+        use std::process::Command;
+
+        // Check for KDE Plasma with KWin (best blur support)
+        if let Ok(output) = Command::new("kwin_x11").arg("--version").output() {
+            if output.status.success() {
+                log::info!("✅ KDE/KWin detected - Blur effects SUPPORTED");
+                return true;
+            }
+        }
+
+        // Check for Wayland KWin
+        if let Ok(output) = Command::new("kwin_wayland").arg("--version").output() {
+            if output.status.success() {
+                log::info!("✅ KDE/KWin Wayland detected - Blur effects SUPPORTED");
+                return true;
+            }
+        }
+
+        // Check for GNOME with blur extensions (less reliable)
+        if std::env::var("XDG_CURRENT_DESKTOP").unwrap_or_default().contains("GNOME") {
+            log::info!("🔍 GNOME detected - Blur support depends on extensions");
+            // GNOME might have blur through extensions, allow it
+            return true;
+        }
+
+        // Check for Compiz (older but has blur)
+        if let Ok(_) = Command::new("compiz").arg("--version").output() {
+            log::info!("✅ Compiz compositor detected - Blur effects SUPPORTED");
+            return true;
+        }
+
+        // Check for Picom with blur (common X11 compositor)
+        if let Ok(output) = Command::new("picom").arg("--version").output() {
+            if output.status.success() {
+                log::info!("✅ Picom compositor detected - Blur effects SUPPORTED");
+                return true;
+            }
+        }
+
+        // Check environment variable for compositor
+        if let Ok(compositor) = std::env::var("COMPOSITOR") {
+            log::info!("🔍 Compositor detected: {} - Assuming blur support", compositor);
+            return true;
+        }
+
+        log::warn!("❌ No known blur-capable compositor detected on Linux");
+        false
+    }
+
+    #[cfg(target_os = "macos")]
+    {
+        // macOS always supports blur/vibrancy effects
+        log::info!("✅ macOS detected - Blur/Vibrancy effects SUPPORTED");
+        true
+    }
+
+    #[cfg(not(any(target_os = "windows", target_os = "linux", target_os = "macos")))]
+    {
+        log::warn!("❌ Unknown platform - Assuming NO blur support");
+        false
+    }
+}
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 628f22b08..85916f6cf 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -78,6 +78,7 @@ pub fn run() {
             core::system::commands::factory_reset,
             core::system::commands::read_logs,
             core::system::commands::is_library_available,
+            core::system::commands::supports_blur_effects,
             // Server commands
             core::server::commands::start_server,
             core::server::commands::stop_server,
@@ -193,6 +194,7 @@ pub fn run() {
             }
 
             setup_mcp(app);
+            setup::setup_theme_listener(app)?;
             Ok(())
         })
         .build(tauri::generate_context!())
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index b0df3fc2f..fb1b1950b 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -40,7 +40,7 @@
       }
     ],
     "security": {
-      "capabilities": ["default"],
+      "capabilities": ["default", "logs-app-window", "logs-window", "system-monitor-window"],
       "csp": {
         "default-src": "'self' customprotocol: asset: http://localhost:* http://127.0.0.1:* ws://localhost:* ws://127.0.0.1:*",
         "connect-src": "ipc: http://ipc.localhost http://127.0.0.1:* ws://localhost:* ws://127.0.0.1:* https: http:",
diff --git a/web-app/index.html b/web-app/index.html
index dd2e76ee6..55625d33c 100644
--- a/web-app/index.html
+++ b/web-app/index.html
@@ -17,7 +17,7 @@
     <link rel="apple-touch-icon" href="/images/jan-logo.png" />
     <meta
       name="viewport"
-      content="width=device-width, initial-scale=1.0, user-scalable=no, maximum-scale=1.0, minimum-scale=1.0, viewport-fit=cover, interactive-widget=resizes-visual"
+      content="width=device-width, initial-scale=1.0, user-scalable=no, maximum-scale=1.0, minimum-scale=1.0, viewport-fit=cover"
     />
     <title>Jan</title>
     <!-- INJECT_GOOGLE_ANALYTICS -->
diff --git a/web-app/src/containers/ColorPickerAppBgColor.tsx b/web-app/src/containers/ColorPickerAppBgColor.tsx
index 72e098aa4..36566d03b 100644
--- a/web-app/src/containers/ColorPickerAppBgColor.tsx
+++ b/web-app/src/containers/ColorPickerAppBgColor.tsx
@@ -1,4 +1,4 @@
-import { useAppearance, isDefaultColor } from '@/hooks/useAppearance'
+import { useAppearance, isDefaultColor, useBlurSupport } from '@/hooks/useAppearance'
 import { cn } from '@/lib/utils'
 import { RgbaColor, RgbaColorPicker } from 'react-colorful'
 import { IconColorPicker } from '@tabler/icons-react'
@@ -14,6 +14,12 @@ export function ColorPickerAppBgColor() {
   const { appBgColor, setAppBgColor } = useAppearance()
   const { isDark } = useTheme()
   const { t } = useTranslation()
+  const showAlphaSlider = useBlurSupport()
+
+  // Helper to get alpha value based on blur support
+  const getAlpha = (defaultAlpha: number) => {
+    return showAlphaSlider ? defaultAlpha : 1
+  }
 
   const predefineAppBgColor: RgbaColor[] = [
     isDark
@@ -21,38 +27,38 @@ export function ColorPickerAppBgColor() {
           r: 25,
           g: 25,
           b: 25,
-          a: IS_WINDOWS || IS_LINUX || !IS_TAURI ? 1 : 0.4,
+          a: getAlpha(0.4),
         }
       : {
           r: 255,
           g: 255,
           b: 255,
-          a: IS_WINDOWS || IS_LINUX || !IS_TAURI ? 1 : 0.4,
+          a: getAlpha(0.4),
         },
     {
       r: 70,
       g: 79,
       b: 229,
-      a: IS_WINDOWS || IS_LINUX || !IS_TAURI ? 1 : 0.5,
+      a: getAlpha(0.5),
     },
     {
       r: 238,
       g: 130,
       b: 238,
-      a: IS_WINDOWS || IS_LINUX || !IS_TAURI ? 1 : 0.5,
+      a: getAlpha(0.5),
     },
 
     {
       r: 255,
       g: 99,
       b: 71,
-      a: IS_WINDOWS || IS_LINUX || !IS_TAURI ? 1 : 0.5,
+      a: getAlpha(0.5),
     },
     {
       r: 255,
       g: 165,
       b: 0,
-      a: IS_WINDOWS || IS_LINUX || !IS_TAURI ? 1 : 0.5,
+      a: getAlpha(0.5),
     },
   ]
 
@@ -61,9 +67,9 @@ export function ColorPickerAppBgColor() {
       {predefineAppBgColor.map((item, i) => {
         const isSelected =
           (item.r === appBgColor.r &&
-          item.g === appBgColor.g &&
-          item.b === appBgColor.b &&
-          item.a === appBgColor.a) ||
+            item.g === appBgColor.g &&
+            item.b === appBgColor.b &&
+            item.a === appBgColor.a) ||
           (isDefaultColor(appBgColor) && isDefaultColor(item))
         return (
           <div
diff --git a/web-app/src/containers/DropdownAssistant.tsx b/web-app/src/containers/DropdownAssistant.tsx
index a75925002..e474df9ed 100644
--- a/web-app/src/containers/DropdownAssistant.tsx
+++ b/web-app/src/containers/DropdownAssistant.tsx
@@ -33,7 +33,7 @@ const DropdownAssistant = () => {
   return (
     <>
       <DropdownMenu open={dropdownOpen} onOpenChange={setDropdownOpen}>
-        <div className="flex items-center justify-between gap-2 bg-main-view-fg/5 py-1 hover:bg-main-view-fg/8 px-2 rounded-sm">
+        <div className="inline-flex items-center justify-between gap-2 bg-main-view-fg/5 py-1 hover:bg-main-view-fg/8 px-2 rounded-sm">
           <DropdownMenuTrigger asChild>
             <button className="font-medium cursor-pointer flex items-center gap-1.5 relative z-20 max-w-40">
               <div className="text-main-view-fg/80 flex items-center gap-1">
diff --git a/web-app/src/containers/LeftPanel.tsx b/web-app/src/containers/LeftPanel.tsx
index a7be18576..898c74326 100644
--- a/web-app/src/containers/LeftPanel.tsx
+++ b/web-app/src/containers/LeftPanel.tsx
@@ -154,7 +154,6 @@ const LeftPanel = () => {
     }
   }, [setLeftPanel, open])
 
-
   const currentPath = useRouterState({
     select: (state) => state.location.pathname,
   })
@@ -640,7 +639,7 @@ const LeftPanel = () => {
                   data-test-id={`menu-${menu.title}`}
                   activeOptions={{ exact: true }}
                   className={cn(
-                    'flex items-center gap-1.5 cursor-pointer hover:bg-left-panel-fg/10 py-1 px-1 rounded',
+                    'flex items-center gap-1.5 cursor-pointer hover:bg-left-panel-fg/10 py-1 my-0.5 px-1 rounded',
                     isActive && 'bg-left-panel-fg/10'
                   )}
                 >
diff --git a/web-app/src/hooks/__tests__/useAppearance.test.ts b/web-app/src/hooks/__tests__/useAppearance.test.ts
index 8a1f3437c..3d28213ed 100644
--- a/web-app/src/hooks/__tests__/useAppearance.test.ts
+++ b/web-app/src/hooks/__tests__/useAppearance.test.ts
@@ -31,6 +31,8 @@ vi.mock('zustand/middleware', () => ({
 // Mock global constants
 Object.defineProperty(global, 'IS_WINDOWS', { value: false, writable: true })
 Object.defineProperty(global, 'IS_LINUX', { value: false, writable: true })
+Object.defineProperty(global, 'IS_MACOS', { value: false, writable: true })
+Object.defineProperty(global, 'IS_TAURI', { value: false, writable: true })
 Object.defineProperty(global, 'IS_WEB_APP', { value: false, writable: true })
 
 describe('useAppearance', () => {
@@ -212,24 +214,55 @@ describe('useAppearance', () => {
 
       const { result } = renderHook(() => useAppearance())
       const testColor = { r: 128, g: 64, b: 192, a: 0.8 }
-      
+
       act(() => {
         result.current.setAppBgColor(testColor)
       })
-      
-      expect(result.current.appBgColor).toEqual(testColor)
+
+      // In web environment (IS_TAURI=false), alpha is forced to 1
+      expect(result.current.appBgColor).toEqual({ ...testColor, a: 1 })
     })
 
     it('should handle transparent colors', () => {
       const { result } = renderHook(() => useAppearance())
       const transparentColor = { r: 100, g: 100, b: 100, a: 0 }
-      
+
       act(() => {
         result.current.setAppAccentBgColor(transparentColor)
       })
-      
+
       expect(result.current.appAccentBgColor).toEqual(transparentColor)
     })
+
+    it('should preserve alpha when blur is supported (macOS)', () => {
+      // Mock macOS environment
+      Object.defineProperty(global, 'IS_MACOS', { value: true, writable: true })
+      Object.defineProperty(global, 'IS_TAURI', { value: true, writable: true })
+      Object.defineProperty(global, 'IS_WINDOWS', { value: false, writable: true })
+      Object.defineProperty(global, 'IS_LINUX', { value: false, writable: true })
+
+      const setPropertySpy = vi.fn()
+      Object.defineProperty(document.documentElement, 'style', {
+        value: {
+          setProperty: setPropertySpy,
+        },
+        writable: true,
+      })
+
+      const { result } = renderHook(() => useAppearance())
+      const testColor = { r: 128, g: 64, b: 192, a: 0.5 }
+
+      act(() => {
+        result.current.setAppBgColor(testColor)
+      })
+
+      // On macOS with Tauri, alpha should be preserved
+      expect(result.current.appBgColor).toEqual(testColor)
+
+      // Reset for other tests
+      Object.defineProperty(global, 'IS_MACOS', { value: false, writable: true })
+      Object.defineProperty(global, 'IS_TAURI', { value: false, writable: true })
+    })
   })
 
   describe('Edge cases', () => {
diff --git a/web-app/src/hooks/useAppearance.ts b/web-app/src/hooks/useAppearance.ts
index 51a1ce10e..874c8ae84 100644
--- a/web-app/src/hooks/useAppearance.ts
+++ b/web-app/src/hooks/useAppearance.ts
@@ -4,6 +4,8 @@ import { localStorageKey } from '@/constants/localStorage'
 import { RgbaColor } from 'react-colorful'
 import { rgb, oklch, formatCss } from 'culori'
 import { useTheme } from './useTheme'
+import { useEffect, useState } from 'react'
+import { getServiceHub } from '@/hooks/useServiceHub'
 
 export type FontSize = '14px' | '15px' | '16px' | '18px'
 export type ChatWidth = 'full' | 'compact'
@@ -41,19 +43,37 @@ export const fontSizeOptions = [
   { label: 'Extra Large', value: '18px' as FontSize },
 ]
 
+// Helper to determine if blur effects are supported
+// This will be dynamically checked on Windows and Linux
+let blurEffectsSupported = true
+if ((IS_WINDOWS || IS_LINUX) && IS_TAURI) {
+  // Default to false for Windows/Linux, will be checked async
+  blurEffectsSupported = false
+}
+
+// Helper to get the appropriate alpha value
+const getAlphaValue = () => {
+  // Web always uses alpha = 1
+  if (!IS_TAURI) return 1
+  // Windows/Linux use 1 if blur not supported, 0.4 if supported
+  if ((IS_WINDOWS || IS_LINUX) && !blurEffectsSupported) return 1
+  // macOS and Windows/Linux with blur support use 0.4
+  return 0.4
+}
+
 // Default appearance settings
 const defaultFontSize: FontSize = '15px'
 const defaultAppBgColor: RgbaColor = {
   r: 25,
   g: 25,
   b: 25,
-  a: IS_WINDOWS || IS_LINUX || !IS_TAURI ? 1 : 0.4,
+  a: getAlphaValue(),
 }
 const defaultLightAppBgColor: RgbaColor = {
   r: 255,
   g: 255,
   b: 255,
-  a: IS_WINDOWS || IS_LINUX || !IS_TAURI ? 1 : 0.4,
+  a: getAlphaValue(),
 }
 const defaultAppMainViewBgColor: RgbaColor = { r: 25, g: 25, b: 25, a: 1 }
 const defaultLightAppMainViewBgColor: RgbaColor = {
@@ -128,6 +148,45 @@ export const getDefaultTextColor = (isDark: boolean): string => {
   return isDark ? defaultDarkLeftPanelTextColor : defaultLightLeftPanelTextColor
 }
 
+// Hook to check if alpha slider should be shown
+export const useBlurSupport = () => {
+  const [supportsBlur, setSupportsBlur] = useState(
+    IS_MACOS && IS_TAURI // Default to true only for macOS
+  )
+
+  useEffect(() => {
+    const checkBlurSupport = async () => {
+      if ((IS_WINDOWS || IS_LINUX) && IS_TAURI) {
+        try {
+          const supported = await getServiceHub().app().supportsBlurEffects()
+          blurEffectsSupported = supported
+          setSupportsBlur(supported)
+
+          const platform = IS_WINDOWS ? 'Windows' : 'Linux'
+          if (supported) {
+            console.log(`✅ ${platform} blur effects: SUPPORTED - Alpha slider will be shown`)
+          } else {
+            console.log(`❌ ${platform} blur effects: NOT SUPPORTED - Alpha slider will be hidden, alpha set to 1`)
+          }
+        } catch (error) {
+          console.error(`❌ Failed to check ${IS_WINDOWS ? 'Windows' : 'Linux'} blur support:`, error)
+          setSupportsBlur(false)
+        }
+      } else if (IS_MACOS && IS_TAURI) {
+        console.log('🍎 macOS platform: Blur effects supported, alpha slider shown')
+      } else if (!IS_TAURI) {
+        console.log('🌐 Web platform: Alpha slider hidden, alpha set to 1')
+      }
+    }
+
+    checkBlurSupport()
+  }, [])
+
+  // Return true if alpha slider should be shown
+  // Show on macOS (always), and conditionally on Windows/Linux based on detection
+  return IS_TAURI && (IS_MACOS || supportsBlur)
+}
+
 export const useAppearance = create<AppearanceState>()(
   persist(
     (set) => {
@@ -295,6 +354,11 @@ export const useAppearance = create<AppearanceState>()(
             finalColor = isDark ? defaultAppBgColor : defaultLightAppBgColor
           }
 
+          // Force alpha to 1 if blur effects are not supported
+          if (!blurEffectsSupported && (IS_WINDOWS || IS_LINUX || !IS_TAURI)) {
+            finalColor = { ...finalColor, a: 1 }
+          }
+
           // Convert RGBA to a format culori can work with
           const culoriRgb = rgb({
             mode: 'rgb',
diff --git a/web-app/src/hooks/useTheme.ts b/web-app/src/hooks/useTheme.ts
index bf17cd90b..35556a4e7 100644
--- a/web-app/src/hooks/useTheme.ts
+++ b/web-app/src/hooks/useTheme.ts
@@ -32,7 +32,9 @@ export const useTheme = create<ThemeState>()(
             await getServiceHub().theme().setTheme(null)
             set(() => ({ activeTheme, isDark: isDarkMode }))
           } else {
-            await getServiceHub().theme().setTheme(activeTheme as ThemeMode)
+            await getServiceHub()
+              .theme()
+              .setTheme(activeTheme as ThemeMode)
             set(() => ({ activeTheme, isDark: activeTheme === 'dark' }))
           }
         },
diff --git a/web-app/src/index.css b/web-app/src/index.css
index 38f741d21..349b36f21 100644
--- a/web-app/src/index.css
+++ b/web-app/src/index.css
@@ -56,7 +56,6 @@
 @layer base {
   body {
     @apply overflow-hidden;
-    background-color: white;
     min-height: 100vh;
     min-height: -webkit-fill-available;
     padding-top: env(safe-area-inset-top, 0px);
diff --git a/web-app/src/providers/AppearanceProvider.tsx b/web-app/src/providers/AppearanceProvider.tsx
index 9f715e94f..70c9a881f 100644
--- a/web-app/src/providers/AppearanceProvider.tsx
+++ b/web-app/src/providers/AppearanceProvider.tsx
@@ -1,5 +1,5 @@
 import { useEffect } from 'react'
-import { useAppearance } from '@/hooks/useAppearance'
+import { useAppearance, useBlurSupport } from '@/hooks/useAppearance'
 import { useTheme } from '@/hooks/useTheme'
 import {
   isDefaultColor,
@@ -29,14 +29,15 @@ export function AppearanceProvider() {
     appDestructiveTextColor,
   } = useAppearance()
   const { isDark } = useTheme()
+  const showAlphaSlider = useBlurSupport()
 
   // Apply appearance settings on mount and when they change
   useEffect(() => {
     // Apply font size
     document.documentElement.style.setProperty('--font-size-base', fontSize)
 
-    // Hide alpha slider when IS_LINUX || !IS_TAURI
-    const shouldHideAlpha = IS_LINUX || !IS_TAURI
+    // Hide alpha slider when blur is not supported
+    const shouldHideAlpha = !showAlphaSlider
     let alphaStyleElement = document.getElementById('alpha-slider-style')
 
     if (shouldHideAlpha) {
@@ -55,12 +56,13 @@ export function AppearanceProvider() {
     // Import culori functions dynamically to avoid SSR issues
     import('culori').then(({ rgb, oklch, formatCss }) => {
       // Convert RGBA to a format culori can work with
+      // Use alpha = 1 when blur is not supported
       const culoriRgb = rgb({
         mode: 'rgb',
         r: appBgColor.r / 255,
         g: appBgColor.g / 255,
         b: appBgColor.b / 255,
-        alpha: IS_WINDOWS || IS_LINUX || !IS_TAURI ? 1 : appBgColor.a,
+        alpha: showAlphaSlider ? appBgColor.a : 1,
       })
 
       const culoriRgbMainView = rgb({
@@ -176,6 +178,7 @@ export function AppearanceProvider() {
     appAccentTextColor,
     appDestructiveBgColor,
     appDestructiveTextColor,
+    showAlphaSlider,
   ])
 
   // Update appearance when theme changes
diff --git a/web-app/src/providers/ThemeProvider.tsx b/web-app/src/providers/ThemeProvider.tsx
index d6fbbc9e4..8d043f040 100644
--- a/web-app/src/providers/ThemeProvider.tsx
+++ b/web-app/src/providers/ThemeProvider.tsx
@@ -1,5 +1,6 @@
 import { useEffect } from 'react'
 import { useTheme, checkOSDarkMode } from '@/hooks/useTheme'
+import { isPlatformTauri } from '@/lib/platform/utils'
 
 /**
  * ThemeProvider ensures theme settings are applied on every page load
@@ -11,13 +12,22 @@ export function ThemeProvider() {
 
   // Detect OS theme on mount and apply it
   useEffect(() => {
-    // If theme is set to auto, detect OS preference
-    if (activeTheme === 'auto') {
-      const isDarkMode = checkOSDarkMode()
-      setIsDark(isDarkMode)
-      setTheme('auto')
+    // Force refresh theme on mount to handle Linux startup timing issues
+    const refreshTheme = () => {
+      if (activeTheme === 'auto') {
+        const isDarkMode = checkOSDarkMode()
+        setIsDark(isDarkMode)
+        setTheme('auto')
+      }
     }
 
+    // Initial refresh
+    refreshTheme()
+
+    // On Linux, desktop environment may not be ready immediately
+    // Add a delayed refresh to catch the correct OS theme
+    const timeoutId = setTimeout(refreshTheme, 100)
+
     // Listen for changes in OS theme preference
     const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)')
 
@@ -30,12 +40,37 @@ export function ThemeProvider() {
       }
     }
 
-    // Add event listener
+    // Add event listener for browser/web
     mediaQuery.addEventListener('change', handleThemeChange)
 
+    // Listen to Tauri native theme events (uses XDG Desktop Portal on Linux)
+    let unlistenTauri: (() => void) | undefined
+
+    if (isPlatformTauri()) {
+      import('@tauri-apps/api/event')
+        .then(({ listen }) => {
+          return listen<string>('theme-changed', (event) => {
+            if (activeTheme === 'auto') {
+              const isDark = event.payload === 'dark'
+              setIsDark(isDark)
+            }
+          })
+        })
+        .then((unlisten) => {
+          unlistenTauri = unlisten
+        })
+        .catch((err) => {
+          console.error('Failed to setup Tauri theme listener:', err)
+        })
+    }
+
     // Clean up
     return () => {
+      clearTimeout(timeoutId)
       mediaQuery.removeEventListener('change', handleThemeChange)
+      if (unlistenTauri) {
+        unlistenTauri()
+      }
     }
   }, [activeTheme, setIsDark, setTheme])
 
diff --git a/web-app/src/routes/index.tsx b/web-app/src/routes/index.tsx
index 2b6f89a1e..982c19c94 100644
--- a/web-app/src/routes/index.tsx
+++ b/web-app/src/routes/index.tsx
@@ -11,7 +11,7 @@ import SetupScreen from '@/containers/SetupScreen'
 import { route } from '@/constants/routes'
 
 type SearchParams = {
-  model?: {
+  'model'?: {
     id: string
     provider: string
   }
@@ -33,7 +33,10 @@ export const Route = createFileRoute(route.home as any)({
     }
 
     // Only include temporary-chat if it's explicitly true
-    if (search[TEMPORARY_CHAT_QUERY_ID] === 'true' || search[TEMPORARY_CHAT_QUERY_ID] === true) {
+    if (
+      search[TEMPORARY_CHAT_QUERY_ID] === 'true' ||
+      search[TEMPORARY_CHAT_QUERY_ID] === true
+    ) {
       result['temporary-chat'] = true
     }
 
@@ -77,7 +80,7 @@ function Index() {
       </HeaderPage>
       <div
         className={cn(
-          'h-full overflow-y-auto flex flex-col gap-2 justify-center px-3 sm:px-4 md:px-8 py-4 md:py-0'
+          'h-full overflow-y-auto inline-flex flex-col gap-2 justify-center px-3 sm:px-4 md:px-8 py-4 md:py-0'
         )}
       >
         <div
@@ -110,7 +113,9 @@ function Index() {
                 isMobile ? 'text-base' : 'text-lg'
               )}
             >
-              {isTemporaryChat ? t('chat:temporaryChatDescription') : t('chat:description')}
+              {isTemporaryChat
+                ? t('chat:temporaryChatDescription')
+                : t('chat:description')}
             </p>
           </div>
           <div className="flex-1 shrink-0">
diff --git a/web-app/src/routes/logs.tsx b/web-app/src/routes/logs.tsx
index 95afde4d7..cedb2751f 100644
--- a/web-app/src/routes/logs.tsx
+++ b/web-app/src/routes/logs.tsx
@@ -31,17 +31,20 @@ function LogsViewer() {
   useEffect(() => {
     let lastLogsLength = 0
     function updateLogs() {
-      serviceHub.app().readLogs().then((logData) => {
-        let needScroll = false
-        const filteredLogs = logData.filter(Boolean) as LogEntry[]
-        if (filteredLogs.length > lastLogsLength) needScroll = true
+      serviceHub
+        .app()
+        .readLogs()
+        .then((logData) => {
+          let needScroll = false
+          const filteredLogs = logData.filter(Boolean) as LogEntry[]
+          if (filteredLogs.length > lastLogsLength) needScroll = true
 
-        lastLogsLength = filteredLogs.length
-        setLogs(filteredLogs)
+          lastLogsLength = filteredLogs.length
+          setLogs(filteredLogs)
 
-        // Scroll to bottom after initial logs are loaded
-        if (needScroll) setTimeout(() => scrollToBottom(), 100)
-      })
+          // Scroll to bottom after initial logs are loaded
+          if (needScroll) setTimeout(() => scrollToBottom(), 100)
+        })
     }
     updateLogs()
 
diff --git a/web-app/src/services/app/default.ts b/web-app/src/services/app/default.ts
index 68fe1f0ea..940a72172 100644
--- a/web-app/src/services/app/default.ts
+++ b/web-app/src/services/app/default.ts
@@ -39,4 +39,9 @@ export class DefaultAppService implements AppService {
     console.log('readYaml called with path:', path)
     throw new Error('readYaml not implemented in default app service')
   }
+
+  async supportsBlurEffects(): Promise<boolean> {
+    // On web/non-Windows platforms, always return false
+    return false
+  }
 }
diff --git a/web-app/src/services/app/tauri.ts b/web-app/src/services/app/tauri.ts
index af770e93d..0d50f418d 100644
--- a/web-app/src/services/app/tauri.ts
+++ b/web-app/src/services/app/tauri.ts
@@ -75,4 +75,8 @@ export class TauriAppService extends DefaultAppService {
   async readYaml<T = unknown>(path: string): Promise<T> {
     return await invoke<T>('read_yaml', { path })
   }
+
+  async supportsBlurEffects(): Promise<boolean> {
+    return await invoke<boolean>('supports_blur_effects')
+  }
 }
diff --git a/web-app/src/services/app/types.ts b/web-app/src/services/app/types.ts
index 4be49c584..7a1d41751 100644
--- a/web-app/src/services/app/types.ts
+++ b/web-app/src/services/app/types.ts
@@ -17,4 +17,5 @@ export interface AppService {
   relocateJanDataFolder(path: string): Promise<void>
   getServerStatus(): Promise<boolean>
   readYaml<T = unknown>(path: string): Promise<T>
+  supportsBlurEffects(): Promise<boolean>
 }
diff --git a/web-app/src/services/app/web.ts b/web-app/src/services/app/web.ts
index 5702079d1..c5b5c6e7b 100644
--- a/web-app/src/services/app/web.ts
+++ b/web-app/src/services/app/web.ts
@@ -45,4 +45,9 @@ export class WebAppService implements AppService {
     console.log('YAML reading not available in web mode')
     throw new Error('readYaml not implemented in web app service')
   }
+
+  async supportsBlurEffects(): Promise<boolean> {
+    // Web platforms don't support blur effects
+    return false
+  }
 }
diff --git a/web-app/src/services/theme/tauri.ts b/web-app/src/services/theme/tauri.ts
index e05d60c74..fad80ac98 100644
--- a/web-app/src/services/theme/tauri.ts
+++ b/web-app/src/services/theme/tauri.ts
@@ -2,7 +2,8 @@
  * Tauri Theme Service - Desktop implementation
  */
 
-import { getCurrentWindow, Theme } from '@tauri-apps/api/window'
+import { Theme } from '@tauri-apps/api/window'
+import { getAllWebviewWindows } from '@tauri-apps/api/webviewWindow'
 import type { ThemeMode } from './types'
 import { DefaultThemeService } from './default'
 
@@ -10,7 +11,27 @@ export class TauriThemeService extends DefaultThemeService {
   async setTheme(theme: ThemeMode): Promise<void> {
     try {
       const tauriTheme = theme as Theme | null
-      await getCurrentWindow().setTheme(tauriTheme)
+
+      // Update all open windows, not just the current one
+      const allWindows = await getAllWebviewWindows()
+
+      // Convert to array if it's not already
+      const windowsArray = Array.isArray(allWindows)
+        ? allWindows
+        : Object.values(allWindows)
+
+      await Promise.all(
+        windowsArray.map(async (window) => {
+          try {
+            await window.setTheme(tauriTheme)
+          } catch (error) {
+            console.error(
+              `Failed to set theme for window ${window.label}:`,
+              error
+            )
+          }
+        })
+      )
     } catch (error) {
       console.error('Error setting theme in Tauri:', error)
       throw error
@@ -21,7 +42,7 @@ export class TauriThemeService extends DefaultThemeService {
     return {
       setTheme: (theme: ThemeMode): Promise<void> => {
         return this.setTheme(theme)
-      }
+      },
     }
   }
 }
diff --git a/web-app/src/services/window/tauri.ts b/web-app/src/services/window/tauri.ts
index a6dd643c7..a0e976ced 100644
--- a/web-app/src/services/window/tauri.ts
+++ b/web-app/src/services/window/tauri.ts
@@ -7,8 +7,39 @@ import type { WindowConfig, WebviewWindowInstance } from './types'
 import { DefaultWindowService } from './default'
 
 export class TauriWindowService extends DefaultWindowService {
-  async createWebviewWindow(config: WindowConfig): Promise<WebviewWindowInstance> {
+  async createWebviewWindow(
+    config: WindowConfig
+  ): Promise<WebviewWindowInstance> {
     try {
+      // Get current theme from localStorage
+      const storedTheme = localStorage.getItem('jan-theme')
+      let theme: 'light' | 'dark' | undefined = undefined
+
+      if (storedTheme) {
+        try {
+          const themeData = JSON.parse(storedTheme)
+          const activeTheme = themeData?.state?.activeTheme
+          const isDark = themeData?.state?.isDark
+
+          // Set theme based on stored preference
+          if (activeTheme === 'auto') {
+            theme = undefined // Let OS decide
+          } else if (
+            activeTheme === 'dark' ||
+            (activeTheme === 'auto' && isDark)
+          ) {
+            theme = 'dark'
+          } else if (
+            activeTheme === 'light' ||
+            (activeTheme === 'auto' && !isDark)
+          ) {
+            theme = 'light'
+          }
+        } catch (e) {
+          console.warn('Failed to parse theme from localStorage:', e)
+        }
+      }
+
       const webviewWindow = new WebviewWindow(config.label, {
         url: config.url,
         title: config.title,
@@ -20,8 +51,12 @@ export class TauriWindowService extends DefaultWindowService {
         maximizable: config.maximizable,
         closable: config.closable,
         fullscreen: config.fullscreen,
+        theme: theme,
       })
 
+      // Setup theme listener for this window
+      this.setupThemeListenerForWindow(webviewWindow)
+
       return {
         label: config.label,
         async close() {
@@ -38,7 +73,7 @@ export class TauriWindowService extends DefaultWindowService {
         },
         async setTitle(title: string) {
           await webviewWindow.setTitle(title)
-        }
+        },
       }
     } catch (error) {
       console.error('Error creating Tauri window:', error)
@@ -46,10 +81,12 @@ export class TauriWindowService extends DefaultWindowService {
     }
   }
 
-  async getWebviewWindowByLabel(label: string): Promise<WebviewWindowInstance | null> {
+  async getWebviewWindowByLabel(
+    label: string
+  ): Promise<WebviewWindowInstance | null> {
     try {
       const existingWindow = await WebviewWindow.getByLabel(label)
-      
+
       if (existingWindow) {
         return {
           label: label,
@@ -67,10 +104,10 @@ export class TauriWindowService extends DefaultWindowService {
           },
           async setTitle(title: string) {
             await existingWindow.setTitle(title)
-          }
+          },
         }
       }
-      
+
       return null
     } catch (error) {
       console.error('Error getting Tauri window by label:', error)
@@ -135,8 +172,35 @@ export class TauriWindowService extends DefaultWindowService {
         center: true,
       })
     } catch (error) {
-      console.error('Error opening local API server logs window in Tauri:', error)
+      console.error(
+        'Error opening local API server logs window in Tauri:',
+        error
+      )
       throw error
     }
   }
+
+  private setupThemeListenerForWindow(window: WebviewWindow): void {
+    // Listen to theme change events from Tauri backend
+    import('@tauri-apps/api/event')
+      .then(({ listen }) => {
+        return listen<string>('theme-changed', async (event) => {
+          const theme = event.payload
+          try {
+            if (theme === 'dark') {
+              await window.setTheme('dark')
+            } else if (theme === 'light') {
+              await window.setTheme('light')
+            } else {
+              await window.setTheme(null)
+            }
+          } catch (err) {
+            console.error('Failed to update window theme:', err)
+          }
+        })
+      })
+      .catch((err) => {
+        console.error('Failed to setup theme listener for window:', err)
+      })
+  }
 }