diff --git a/apps/desktop/src/App.vue b/apps/desktop/src/App.vue
index 29ca624f85..39eb08419b 100644
--- a/apps/desktop/src/App.vue
+++ b/apps/desktop/src/App.vue
@@ -34,7 +34,6 @@ import { useVisibilityChange } from "@/composables/useVisibilityChange";
 import { useWebDavAutoUpload } from "@/composables/useWebDavAutoUpload";
 import { useScheduledDatabaseBackups } from "@/composables/useScheduledDatabaseBackups";
 import { shouldDrawDesktopWindowFrame } from "@/composables/useWindowControls";
-import { startDialogBackdropSync, stopDialogBackdropSync } from "@/lib/app/dialogBackdrop";
 import { useSaveSqlFolderSelection } from "@/composables/useSaveSqlFolderSelection";
 import "@/i18n";
 import { translateBackendError } from "@/i18n/backend-errors";
@@ -2093,7 +2092,6 @@ onMounted(async () => {
   });
   applyTheme();
   void applyUiScale(settingsStore.editorSettings.uiScale);
-  startDialogBackdropSync();
   window.addEventListener("keydown", handleKeydown);
   window.addEventListener("dbx-open-driver-store", openDriverStoreFromEvent);
   if (isDesktop) {
@@ -2154,7 +2152,6 @@ onMounted(async () => {
 });
 
 onUnmounted(() => {
-  stopDialogBackdropSync();
   cleanupTauriListeners();
   cleanupCloseActionPromptListener();
   if (updateCheckTimer) {
diff --git a/apps/desktop/src/components/ui/dialog/DialogOverlay.vue b/apps/desktop/src/components/ui/dialog/DialogOverlay.vue
index 77e688cb11..f627dce635 100644
--- a/apps/desktop/src/components/ui/dialog/DialogOverlay.vue
+++ b/apps/desktop/src/components/ui/dialog/DialogOverlay.vue
@@ -26,7 +26,7 @@ async function startWindowDrag(event: PointerEvent) {
 </script>
 
 <template>
-  <DialogOverlay data-slot="dialog-overlay" v-bind="delegatedProps" :class="cn('data-open:animate-in data-closed:animate-out data-closed:fade-out-0 data-open:fade-in-0 bg-black/10 duration-100 fixed inset-0 isolate z-50', props.class)">
+  <DialogOverlay data-slot="dialog-overlay" v-bind="delegatedProps" :class="cn('data-open:animate-in data-closed:animate-out data-closed:fade-out-0 data-open:fade-in-0 bg-black/25 dark:bg-background/70 duration-100 fixed inset-0 isolate z-50', props.class)">
     <div v-if="isDesktop" aria-hidden="true" class="fixed inset-x-0 top-0 h-10 pointer-events-auto" data-tauri-drag-region @pointerdown="startWindowDrag" />
     <slot />
   </DialogOverlay>
diff --git a/apps/desktop/src/lib/app/dialogBackdrop.ts b/apps/desktop/src/lib/app/dialogBackdrop.ts
deleted file mode 100644
index 2b83a01ab4..0000000000
--- a/apps/desktop/src/lib/app/dialogBackdrop.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-const DIALOG_BACKDROP_CLASS = "dbx-dialog-backdrop-active";
-
-let dialogBackdropObserver: MutationObserver | undefined;
-
-function hasDialogOverlay(): boolean {
-  return Array.from(document.body.children).some((child) => child.matches('[data-slot="dialog-overlay"]') || child.querySelector('[data-slot="dialog-overlay"]'));
-}
-
-function syncDialogBackdrop() {
-  document.documentElement.classList.toggle(DIALOG_BACKDROP_CLASS, hasDialogOverlay());
-}
-
-export function startDialogBackdropSync() {
-  if (typeof document === "undefined" || dialogBackdropObserver) return;
-  dialogBackdropObserver = new MutationObserver(syncDialogBackdrop);
-  dialogBackdropObserver.observe(document.body, { childList: true });
-  syncDialogBackdrop();
-}
-
-export function stopDialogBackdropSync() {
-  dialogBackdropObserver?.disconnect();
-  dialogBackdropObserver = undefined;
-  document.documentElement.classList.remove(DIALOG_BACKDROP_CLASS);
-}
diff --git a/apps/desktop/src/styles/__tests__/legacyWebviewFallback.spec.ts b/apps/desktop/src/styles/__tests__/legacyWebviewFallback.spec.ts
index 0f7ec63c5e..007cf6f6b1 100644
--- a/apps/desktop/src/styles/__tests__/legacyWebviewFallback.spec.ts
+++ b/apps/desktop/src/styles/__tests__/legacyWebviewFallback.spec.ts
@@ -6,8 +6,6 @@ const dialogContentSource = readFileSync(new URL("../../components/ui/dialog/Dia
 const dialogScrollContentSource = readFileSync(new URL("../../components/ui/dialog/DialogScrollContent.vue", import.meta.url), "utf8");
 const dialogOverlaySource = readFileSync(new URL("../../components/ui/dialog/DialogOverlay.vue", import.meta.url), "utf8");
 const connectionDialogSource = readFileSync(new URL("../../components/connection/ConnectionDialog.vue", import.meta.url), "utf8");
-const dialogBackdropSource = readFileSync(new URL("../../lib/app/dialogBackdrop.ts", import.meta.url), "utf8");
-const appSource = readFileSync(new URL("../../App.vue", import.meta.url), "utf8");
 const desktopIndexSource = readFileSync(new URL("../../../index.html", import.meta.url), "utf8");
 const connectionDialogLegacyCss = readFileSync(new URL("../../../public/connection-dialog-legacy.css", import.meta.url), "utf8");
 
@@ -46,15 +44,12 @@ describe("legacy WebView CSS fallbacks", () => {
     expect(connectionDialogSource).toContain("max-height: calc(var(--dbx-viewport-height) - 2rem);");
   });
 
-  it("blurs the stable app root instead of the transient dialog overlay", () => {
+  it("uses a lightweight theme-aware mask without full-window filters", () => {
     expect(dialogOverlaySource).not.toContain("backdrop-filter");
-    expect(dialogOverlaySource).toContain("bg-black/10");
-    expect(globalsCss).toContain("html.dbx-dialog-backdrop-active #root");
-    expect(globalsCss).toContain("filter: blur(4px);");
-    expect(dialogBackdropSource).toContain("dialogBackdropObserver.observe(document.body, { childList: true })");
-    expect(dialogBackdropSource).not.toContain("subtree: true");
-    expect(appSource).toContain("startDialogBackdropSync();");
-    expect(appSource).toContain("stopDialogBackdropSync();");
+    expect(dialogOverlaySource).toContain("bg-black/25");
+    expect(dialogOverlaySource).toContain("dark:bg-background/70");
+    expect(globalsCss).not.toContain("dbx-dialog-backdrop");
+    expect(globalsCss).not.toContain("filter: blur(4px);");
   });
 
   it("keeps legacy tab triggers connected to the configured corner style", () => {
diff --git a/apps/desktop/src/styles/globals.css b/apps/desktop/src/styles/globals.css
index d2dcb458ff..c4bb950c54 100644
--- a/apps/desktop/src/styles/globals.css
+++ b/apps/desktop/src/styles/globals.css
@@ -270,10 +270,6 @@
   }
 }
 
-html.dbx-dialog-backdrop-active #root {
-  filter: blur(4px);
-}
-
 .dark {
   --background: rgb(19 20 22);
   --foreground: rgb(215 215 219);