diff --git a/src/main.ts b/src/main.ts
index 723808e..bfbe735 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -47,7 +47,7 @@ import * as fs from "fs";
 import * as crypto from "crypto";
 import { MecabTokenizer } from "./mecab-tokenizer";
 import { BaseWindowTracker } from "./window-trackers";
-import {
+import type {
   JimakuApiResponse,
   JimakuDownloadResult,
   JimakuMediaInfo,
@@ -78,169 +78,126 @@ import {
   getSubsyncConfig,
 } from "./subsync/utils";
 import {
-  CliArgs,
-  CliCommandSource,
   hasExplicitCommand,
   parseArgs,
   shouldStartApp,
 } from "./cli/args";
+import type { CliArgs, CliCommandSource } from "./cli/args";
 import { printHelp } from "./cli/help";
-import { generateDefaultConfigFile } from "./core/utils/config-gen";
 import {
+  asBoolean,
+  asFiniteNumber,
+  asString,
   enforceUnsupportedWaylandMode,
   forceX11Backend,
-} from "./core/utils/electron-backend";
-import { asBoolean, asFiniteNumber, asString } from "./core/utils/coerce";
-import { resolveKeybindings } from "./core/utils/keybindings";
-import { resolveConfiguredShortcuts } from "./core/utils/shortcut-config";
-import { TexthookerService } from "./core/services/texthooker-service";
+  generateDefaultConfigFile,
+  resolveConfiguredShortcuts,
+  resolveKeybindings,
+  showDesktopNotification,
+} from "./core/utils";
 import {
-  hasMpvWebsocketPlugin,
-  SubtitleWebSocketService,
-} from "./core/services/subtitle-ws-service";
-import { registerGlobalShortcutsService } from "./core/services/shortcut-service";
-import { registerIpcHandlersService } from "./core/services/ipc-service";
-import {
-  isGlobalShortcutRegisteredSafe,
-  shortcutMatchesInputForLocalFallback,
-} from "./core/services/shortcut-fallback-service";
-import {
-  registerOverlayShortcutsService,
-} from "./core/services/overlay-shortcut-service";
-import { createOverlayShortcutRuntimeHandlers } from "./core/services/overlay-shortcut-runtime-service";
-import { handleCliCommandService } from "./core/services/cli-command-service";
-import { cycleSecondarySubModeService } from "./core/services/secondary-subtitle-service";
-import {
-  refreshOverlayShortcutsRuntimeService,
-  syncOverlayShortcutsRuntimeService,
-  unregisterOverlayShortcutsRuntimeService,
-} from "./core/services/overlay-shortcut-lifecycle-service";
-import {
-  copyCurrentSubtitleService,
-  handleMineSentenceDigitService,
-  handleMultiCopyDigitService,
-  markLastCardAsAudioCardService,
-  mineSentenceCardService,
-  triggerFieldGroupingService,
-  updateLastCardFromClipboardService,
-} from "./core/services/mining-runtime-service";
-import { startAppLifecycleService } from "./core/services/app-lifecycle-service";
-import {
-  playNextSubtitleRuntimeService,
-  replayCurrentSubtitleRuntimeService,
-  sendMpvCommandRuntimeService,
-  setMpvSubVisibilityRuntimeService,
-  showMpvOsdRuntimeService,
-} from "./core/services/mpv-runtime-service";
-import {
-  getInitialInvisibleOverlayVisibilityService,
-  isAutoUpdateEnabledRuntimeService,
-  shouldAutoInitializeOverlayRuntimeFromConfigService,
-  shouldBindVisibleOverlayToMpvSubVisibilityService,
-} from "./core/services/runtime-config-service";
-import { showDesktopNotification } from "./core/utils/notification";
-import { openYomitanSettingsWindow } from "./core/services/yomitan-settings-service";
-import { tokenizeSubtitleService } from "./core/services/tokenizer-service";
-import { loadYomitanExtensionService } from "./core/services/yomitan-extension-loader-service";
-import {
-  getJimakuLanguagePreferenceService,
-  getJimakuMaxEntryResultsService,
-  jimakuFetchJsonService,
-  resolveJimakuApiKeyService,
-} from "./core/services/jimaku-runtime-service";
-import {
-  loadSubtitlePositionService,
-  saveSubtitlePositionService,
-  updateCurrentMediaPathService,
-} from "./core/services/subtitle-position-service";
-import {
-  createOverlayWindowService,
-  enforceOverlayLayerOrderService,
-  ensureOverlayWindowLevelService,
-  updateOverlayBoundsService,
-} from "./core/services/overlay-window-service";
-import { initializeOverlayRuntimeService } from "./core/services/overlay-runtime-init-service";
-import {
-  syncInvisibleOverlayMousePassthroughService,
-} from "./core/services/overlay-visibility-runtime-service";
-import {
-  setInvisibleOverlayVisibleRuntimeFacadeService,
-  setVisibleOverlayVisibleRuntimeFacadeService,
-  toggleInvisibleOverlayRuntimeFacadeService,
-  toggleVisibleOverlayRuntimeFacadeService,
-} from "./core/services/overlay-visibility-facade-service";
-import {
-  MpvIpcClient,
   MPV_REQUEST_ID_SECONDARY_SUB_VISIBILITY,
-} from "./core/services/mpv-service";
-import { applyMpvSubtitleRenderMetricsPatchService } from "./core/services/mpv-render-metrics-service";
-import {
-  handleMpvCommandFromIpcService,
-} from "./core/services/ipc-command-service";
-import {
-  handleOverlayModalClosedService,
-} from "./core/services/overlay-modal-restore-service";
-import {
+  MpvIpcClient,
+  SubtitleWebSocketService,
+  TexthookerService,
+  applyMpvSubtitleRenderMetricsPatchService,
   broadcastRuntimeOptionsChangedRuntimeService,
   broadcastToOverlayWindowsRuntimeService,
-  getOverlayWindowsRuntimeService,
-  setOverlayDebugVisualizationEnabledRuntimeService,
-} from "./core/services/overlay-broadcast-runtime-service";
-import { createMpvIpcClientDepsRuntimeService } from "./core/services/mpv-client-deps-runtime-service";
-import { createAppLifecycleDepsRuntimeService } from "./core/services/app-lifecycle-deps-runtime-service";
-import { createCliCommandDepsRuntimeService } from "./core/services/cli-command-deps-runtime-service";
-import { createIpcDepsRuntimeService } from "./core/services/ipc-deps-runtime-service";
-import { createAnkiJimakuIpcDepsRuntimeService } from "./core/services/anki-jimaku-ipc-deps-runtime-service";
-import { createFieldGroupingOverlayRuntimeService } from "./core/services/field-grouping-overlay-runtime-service";
-import { createSubsyncRuntimeDepsService } from "./core/services/subsync-deps-runtime-service";
-import { createNumericShortcutRuntimeService } from "./core/services/numeric-shortcut-runtime-service";
-import { createOverlayVisibilityFacadeDepsRuntimeService } from "./core/services/overlay-visibility-facade-deps-runtime-service";
-import { createMpvCommandIpcDepsRuntimeService } from "./core/services/mpv-command-ipc-deps-runtime-service";
-import { createRuntimeOptionsIpcDepsRuntimeService } from "./core/services/runtime-options-ipc-deps-runtime-service";
-import { createTokenizerDepsRuntimeService } from "./core/services/tokenizer-deps-runtime-service";
-import {
-  createInitializeOverlayRuntimeDepsService,
-  createInvisibleOverlayVisibilityDepsRuntimeService,
-  createOverlayWindowRuntimeDepsService,
-  createVisibleOverlayVisibilityDepsRuntimeService,
-} from "./core/services/overlay-runtime-deps-service";
-import {
-  createOverlayShortcutLifecycleDepsRuntimeService,
-  createOverlayShortcutRuntimeDepsService,
-} from "./core/services/overlay-shortcut-runtime-deps-service";
-import {
+  copyCurrentSubtitleService,
+  createAnkiJimakuIpcDepsRuntimeService,
+  createAppLifecycleDepsRuntimeService,
+  createAppLoggingRuntimeService,
+  createCliCommandDepsRuntimeService,
   createCopyCurrentSubtitleDepsRuntimeService,
+  createFieldGroupingOverlayRuntimeService,
+  createGlobalShortcutRegistrationDepsRuntimeService,
   createHandleMineSentenceDigitDepsRuntimeService,
   createHandleMultiCopyDigitDepsRuntimeService,
+  createInitializeOverlayRuntimeDepsService,
+  createInvisibleOverlayVisibilityDepsRuntimeService,
+  createIpcDepsRuntimeService,
   createMarkLastCardAsAudioCardDepsRuntimeService,
+  createMecabTokenizerAndCheckRuntimeService,
   createMineSentenceCardDepsRuntimeService,
+  createMpvCommandIpcDepsRuntimeService,
+  createMpvIpcClientDepsRuntimeService,
+  createNumericShortcutRuntimeService,
+  createOverlayShortcutLifecycleDepsRuntimeService,
+  createOverlayShortcutRuntimeDepsService,
+  createOverlayShortcutRuntimeHandlers,
+  createOverlayVisibilityFacadeDepsRuntimeService,
+  createOverlayWindowRuntimeDepsService,
+  createOverlayWindowService,
+  createRuntimeOptionsIpcDepsRuntimeService,
+  createRuntimeOptionsManagerRuntimeService,
+  createSecondarySubtitleCycleDepsRuntimeService,
+  createStartupLifecycleHooksRuntimeService,
+  createSubsyncRuntimeDepsService,
+  createSubtitleTimingTrackerRuntimeService,
+  createTokenizerDepsRuntimeService,
   createTriggerFieldGroupingDepsRuntimeService,
   createUpdateLastCardFromClipboardDepsRuntimeService,
-} from "./core/services/mining-runtime-deps-service";
-import {
-  createGlobalShortcutRegistrationDepsRuntimeService,
-  createSecondarySubtitleCycleDepsRuntimeService,
+  createVisibleOverlayVisibilityDepsRuntimeService,
   createYomitanSettingsWindowDepsRuntimeService,
+  cycleSecondarySubModeService,
+  enforceOverlayLayerOrderService,
+  ensureOverlayWindowLevelService,
+  getInitialInvisibleOverlayVisibilityService,
+  getJimakuLanguagePreferenceService,
+  getJimakuMaxEntryResultsService,
+  getOverlayWindowsRuntimeService,
+  handleCliCommandService,
+  handleMineSentenceDigitService,
+  handleMpvCommandFromIpcService,
+  handleMultiCopyDigitService,
+  handleOverlayModalClosedService,
+  hasMpvWebsocketPlugin,
+  initializeOverlayRuntimeService,
+  isAutoUpdateEnabledRuntimeService,
+  isGlobalShortcutRegisteredSafe,
+  jimakuFetchJsonService,
+  loadSubtitlePositionService,
+  loadYomitanExtensionService,
+  markLastCardAsAudioCardService,
+  mineSentenceCardService,
+  openYomitanSettingsWindow,
+  playNextSubtitleRuntimeService,
+  refreshOverlayShortcutsRuntimeService,
+  registerAnkiJimakuIpcRuntimeService,
+  registerGlobalShortcutsService,
+  registerIpcHandlersService,
+  registerOverlayShortcutsService,
+  replayCurrentSubtitleRuntimeService,
+  resolveJimakuApiKeyService,
+  runGenerateConfigFlowRuntimeService,
   runOverlayShortcutLocalFallbackRuntimeService,
-} from "./core/services/shortcut-ui-runtime-deps-service";
-import { createStartupLifecycleHooksRuntimeService } from "./core/services/startup-lifecycle-hooks-runtime-service";
-import { createRuntimeOptionsManagerRuntimeService } from "./core/services/runtime-options-manager-runtime-service";
-import { createAppLoggingRuntimeService } from "./core/services/app-logging-runtime-service";
-import {
-  createMecabTokenizerAndCheckRuntimeService,
-  createSubtitleTimingTrackerRuntimeService,
-} from "./core/services/startup-resource-runtime-service";
-import { runGenerateConfigFlowRuntimeService } from "./core/services/config-generation-runtime-service";
-import { runStartupBootstrapRuntimeService } from "./core/services/startup-bootstrap-runtime-service";
-import {
+  runStartupBootstrapRuntimeService,
   runSubsyncManualFromIpcRuntimeService,
+  saveSubtitlePositionService,
+  sendMpvCommandRuntimeService,
+  setInvisibleOverlayVisibleRuntimeFacadeService,
+  setMpvSubVisibilityRuntimeService,
+  setOverlayDebugVisualizationEnabledRuntimeService,
+  setVisibleOverlayVisibleRuntimeFacadeService,
+  shouldAutoInitializeOverlayRuntimeFromConfigService,
+  shouldBindVisibleOverlayToMpvSubVisibilityService,
+  shortcutMatchesInputForLocalFallback,
+  showMpvOsdRuntimeService,
+  startAppLifecycleService,
+  syncInvisibleOverlayMousePassthroughService,
+  syncOverlayShortcutsRuntimeService,
+  tokenizeSubtitleService,
+  toggleInvisibleOverlayRuntimeFacadeService,
+  toggleVisibleOverlayRuntimeFacadeService,
+  triggerFieldGroupingService,
   triggerSubsyncFromConfigRuntimeService,
-} from "./core/services/subsync-runtime-service";
-import {
+  unregisterOverlayShortcutsRuntimeService,
+  updateCurrentMediaPathService,
   updateInvisibleOverlayVisibilityService,
+  updateLastCardFromClipboardService,
+  updateOverlayBoundsService,
   updateVisibleOverlayVisibilityService,
-} from "./core/services/overlay-visibility-service";
-import { registerAnkiJimakuIpcRuntimeService } from "./core/services/anki-jimaku-runtime-service";
+} from "./core/services";
 import {
   ConfigService,
   DEFAULT_CONFIG,
@@ -474,6 +431,12 @@ function updateCurrentMediaPath(mediaPath: unknown): void {
 }
 
 let subsyncInProgress = false;
+let initialArgs: CliArgs;
+let mpvSocketPath = getDefaultSocketPath();
+let texthookerPort = DEFAULT_TEXTHOOKER_PORT;
+let backendOverride: string | null = null;
+let autoStartOverlay = false;
+let texthookerOnlyMode = false;
 
 const startupState = runStartupBootstrapRuntimeService({
   argv: process.argv,
@@ -684,12 +647,12 @@ const startupState = runStartupBootstrapRuntimeService({
   },
 });
 
-const initialArgs = startupState.initialArgs;
-let mpvSocketPath = startupState.mpvSocketPath;
-let texthookerPort = startupState.texthookerPort;
-const backendOverride = startupState.backendOverride;
-const autoStartOverlay = startupState.autoStartOverlay;
-const texthookerOnlyMode = startupState.texthookerOnlyMode;
+initialArgs = startupState.initialArgs;
+mpvSocketPath = startupState.mpvSocketPath;
+texthookerPort = startupState.texthookerPort;
+backendOverride = startupState.backendOverride;
+autoStartOverlay = startupState.autoStartOverlay;
+texthookerOnlyMode = startupState.texthookerOnlyMode;
 
 function handleCliCommand(
   args: CliArgs,
diff --git a/src/renderer/renderer.ts b/src/renderer/renderer.ts
index 1284cfc..09f3b38 100644
--- a/src/renderer/renderer.ts
+++ b/src/renderer/renderer.ts
@@ -405,6 +405,18 @@ let mpvSubtitleRenderMetrics: MpvSubtitleRenderMetrics = {
 };
 let currentSubtitleAss = "";
 
+function isAnySettingsModalOpen(): boolean {
+  return runtimeOptionsModalOpen || subsyncModalOpen || kikuModalOpen;
+}
+
+function syncSettingsModalSubtitleSuppression(): void {
+  const suppressSubtitles = isAnySettingsModalOpen();
+  document.body.classList.toggle("settings-modal-open", suppressSubtitles);
+  if (suppressSubtitles) {
+    isOverSubtitle = false;
+  }
+}
+
 function normalizeSubtitle(text: string, trim = true): string {
   if (!text) return "";
 
@@ -1140,6 +1152,7 @@ function updateRuntimeOptions(options: RuntimeOptionState[]): void {
 function closeRuntimeOptionsModal(): void {
   if (!runtimeOptionsModalOpen) return;
   runtimeOptionsModalOpen = false;
+  syncSettingsModalSubtitleSuppression();
   runtimeOptionsModal.classList.add("hidden");
   runtimeOptionsModal.setAttribute("aria-hidden", "true");
   window.electronAPI.notifyOverlayModalClosed("runtime-options");
@@ -1159,6 +1172,7 @@ async function openRuntimeOptionsModal(): Promise<void> {
   const options = await window.electronAPI.getRuntimeOptions();
   updateRuntimeOptions(options);
   runtimeOptionsModalOpen = true;
+  syncSettingsModalSubtitleSuppression();
   overlay.classList.add("interactive");
   runtimeOptionsModal.classList.remove("hidden");
   runtimeOptionsModal.setAttribute("aria-hidden", "false");
@@ -1296,6 +1310,7 @@ function renderSubsyncSourceTracks(): void {
 function closeSubsyncModal(): void {
   if (!subsyncModalOpen) return;
   subsyncModalOpen = false;
+  syncSettingsModalSubtitleSuppression();
   subsyncModal.classList.add("hidden");
   subsyncModal.setAttribute("aria-hidden", "true");
   window.electronAPI.notifyOverlayModalClosed("subsync");
@@ -1326,6 +1341,7 @@ function openSubsyncModal(payload: SubsyncManualPayload): void {
     false,
   );
   subsyncModalOpen = true;
+  syncSettingsModalSubtitleSuppression();
   overlay.classList.add("interactive");
   subsyncModal.classList.remove("hidden");
   subsyncModal.setAttribute("aria-hidden", "false");
@@ -1454,6 +1470,7 @@ function openKikuFieldGroupingModal(data: {
 
   updateKikuCardSelection();
 
+  syncSettingsModalSubtitleSuppression();
   overlay.classList.add("interactive");
   kikuModal.classList.remove("hidden");
   kikuModal.setAttribute("aria-hidden", "false");
@@ -1462,6 +1479,7 @@ function openKikuFieldGroupingModal(data: {
 function closeKikuFieldGroupingModal(): void {
   if (!kikuModalOpen) return;
   kikuModalOpen = false;
+  syncSettingsModalSubtitleSuppression();
   kikuModal.classList.add("hidden");
   kikuModal.setAttribute("aria-hidden", "true");
   setKikuPreviewError(null);
@@ -2395,6 +2413,7 @@ async function init(): Promise<void> {
     openRuntimeOptionsModal().catch(() => {
       setRuntimeOptionsStatus("Failed to load runtime options", true);
       window.electronAPI.notifyOverlayModalClosed("runtime-options");
+      syncSettingsModalSubtitleSuppression();
     });
   });
   window.electronAPI.onOpenJimaku(() => {
diff --git a/src/renderer/style.css b/src/renderer/style.css
index b9885e8..3e1d13b 100644
--- a/src/renderer/style.css
+++ b/src/renderer/style.css
@@ -259,6 +259,11 @@ body {
   display: none;
 }
 
+body.settings-modal-open #subtitleContainer {
+  display: none !important;
+  pointer-events: none !important;
+}
+
 #subtitleRoot .c {
   display: inline;
   position: relative;
@@ -378,6 +383,11 @@ body.layer-invisible.debug-invisible-visualization #subtitleRoot .c {
   display: none;
 }
 
+body.settings-modal-open #secondarySubContainer {
+  display: none !important;
+  pointer-events: none !important;
+}
+
 .secondary-sub-hidden {
   display: none !important;
 }