diff --git a/src/core/services/shortcut-fallback-service.ts b/src/core/services/shortcut-fallback-service.ts
new file mode 100644
index 0000000..898b697
--- /dev/null
+++ b/src/core/services/shortcut-fallback-service.ts
@@ -0,0 +1,89 @@
+import { globalShortcut } from "electron";
+
+export function isGlobalShortcutRegisteredSafe(accelerator: string): boolean {
+  try {
+    return globalShortcut.isRegistered(accelerator);
+  } catch {
+    return false;
+  }
+}
+
+export function shortcutMatchesInputForLocalFallback(
+  input: Electron.Input,
+  accelerator: string,
+  allowWhenRegistered = false,
+): boolean {
+  if (input.type !== "keyDown" || input.isAutoRepeat) return false;
+  if (!accelerator) return false;
+  if (!allowWhenRegistered && isGlobalShortcutRegisteredSafe(accelerator)) {
+    return false;
+  }
+
+  const normalized = accelerator
+    .replace(/\s+/g, "")
+    .replace(/cmdorctrl/gi, "CommandOrControl")
+    .toLowerCase();
+  const parts = normalized.split("+").filter(Boolean);
+  if (parts.length === 0) return false;
+
+  const keyToken = parts[parts.length - 1];
+  const modifierTokens = new Set(parts.slice(0, -1));
+  const allowedModifiers = new Set([
+    "shift",
+    "alt",
+    "meta",
+    "control",
+    "commandorcontrol",
+  ]);
+  for (const token of modifierTokens) {
+    if (!allowedModifiers.has(token)) return false;
+  }
+
+  const inputKey = (input.key || "").toLowerCase();
+  if (keyToken.length === 1) {
+    if (inputKey !== keyToken) return false;
+  } else if (keyToken.startsWith("key") && keyToken.length === 4) {
+    if (inputKey !== keyToken.slice(3)) return false;
+  } else {
+    return false;
+  }
+
+  const expectedShift = modifierTokens.has("shift");
+  const expectedAlt = modifierTokens.has("alt");
+  const expectedMeta = modifierTokens.has("meta");
+  const expectedControl = modifierTokens.has("control");
+  const expectedCommandOrControl = modifierTokens.has("commandorcontrol");
+
+  if (Boolean(input.shift) !== expectedShift) return false;
+  if (Boolean(input.alt) !== expectedAlt) return false;
+
+  if (expectedCommandOrControl) {
+    const hasCmdOrCtrl =
+      process.platform === "darwin"
+        ? Boolean(input.meta || input.control)
+        : Boolean(input.control);
+    if (!hasCmdOrCtrl) return false;
+  } else {
+    if (process.platform === "darwin") {
+      if (input.meta || input.control) return false;
+    } else if (input.control) {
+      return false;
+    }
+  }
+
+  if (expectedMeta && !input.meta) return false;
+  if (!expectedMeta && modifierTokens.has("meta") === false && input.meta) {
+    if (!expectedCommandOrControl) return false;
+  }
+
+  if (expectedControl && !input.control) return false;
+  if (
+    !expectedControl &&
+    modifierTokens.has("control") === false &&
+    input.control
+  ) {
+    if (!expectedCommandOrControl) return false;
+  }
+
+  return true;
+}
diff --git a/src/main.ts b/src/main.ts
index 0617c9e..adda9be 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -131,6 +131,10 @@ import {
 } 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 {
   ConfigService,
   DEFAULT_CONFIG,
@@ -2405,142 +2409,6 @@ function getConfiguredShortcuts() {
   };
 }
 
-function shouldUseMarkAudioCardLocalFallback(input: Electron.Input): boolean {
-  const shortcuts = getConfiguredShortcuts();
-  if (!shortcuts.markAudioCard) return false;
-  if (globalShortcut.isRegistered(shortcuts.markAudioCard)) return false;
-
-  const normalized = shortcuts.markAudioCard.replace(/\s+/g, "").toLowerCase();
-  const supportsFallback =
-    normalized === "commandorcontrol+shift+a" ||
-    normalized === "cmdorctrl+shift+a" ||
-    normalized === "control+shift+a" ||
-    normalized === "ctrl+shift+a";
-  if (!supportsFallback) return false;
-
-  if (input.type !== "keyDown" || input.isAutoRepeat) return false;
-  if ((input.key || "").toLowerCase() !== "a") return false;
-  if (!input.shift || input.alt) return false;
-
-  if (process.platform === "darwin") {
-    return Boolean(input.meta || input.control);
-  }
-  return Boolean(input.control);
-}
-
-function shouldUseRuntimeOptionsLocalFallback(input: Electron.Input): boolean {
-  const shortcuts = getConfiguredShortcuts();
-  if (!shortcuts.openRuntimeOptions) return false;
-  if (globalShortcut.isRegistered(shortcuts.openRuntimeOptions)) return false;
-
-  const normalized = shortcuts.openRuntimeOptions
-    .replace(/\s+/g, "")
-    .toLowerCase();
-  const supportsFallback =
-    normalized === "commandorcontrol+shift+o" ||
-    normalized === "cmdorctrl+shift+o" ||
-    normalized === "control+shift+o" ||
-    normalized === "ctrl+shift+o";
-  if (!supportsFallback) return false;
-
-  if (input.type !== "keyDown" || input.isAutoRepeat) return false;
-  if ((input.key || "").toLowerCase() !== "o") return false;
-  if (!input.shift || input.alt) return false;
-
-  if (process.platform === "darwin") {
-    return Boolean(input.meta || input.control);
-  }
-  return Boolean(input.control);
-}
-
-function isGlobalShortcutRegisteredSafe(accelerator: string): boolean {
-  try {
-    return globalShortcut.isRegistered(accelerator);
-  } catch {
-    return false;
-  }
-}
-
-function shortcutMatchesInputForLocalFallback(
-  input: Electron.Input,
-  accelerator: string,
-  allowWhenRegistered = false,
-): boolean {
-  if (input.type !== "keyDown" || input.isAutoRepeat) return false;
-  if (!accelerator) return false;
-  if (!allowWhenRegistered && isGlobalShortcutRegisteredSafe(accelerator)) {
-    return false;
-  }
-
-  const normalized = accelerator
-    .replace(/\s+/g, "")
-    .replace(/cmdorctrl/gi, "CommandOrControl")
-    .toLowerCase();
-  const parts = normalized.split("+").filter(Boolean);
-  if (parts.length === 0) return false;
-
-  const keyToken = parts[parts.length - 1];
-  const modifierTokens = new Set(parts.slice(0, -1));
-  const allowedModifiers = new Set([
-    "shift",
-    "alt",
-    "meta",
-    "control",
-    "commandorcontrol",
-  ]);
-  for (const token of modifierTokens) {
-    if (!allowedModifiers.has(token)) return false;
-  }
-
-  const inputKey = (input.key || "").toLowerCase();
-  if (keyToken.length === 1) {
-    if (inputKey !== keyToken) return false;
-  } else if (keyToken.startsWith("key") && keyToken.length === 4) {
-    if (inputKey !== keyToken.slice(3)) return false;
-  } else {
-    return false;
-  }
-
-  const expectedShift = modifierTokens.has("shift");
-  const expectedAlt = modifierTokens.has("alt");
-  const expectedMeta = modifierTokens.has("meta");
-  const expectedControl = modifierTokens.has("control");
-  const expectedCommandOrControl = modifierTokens.has("commandorcontrol");
-
-  if (Boolean(input.shift) !== expectedShift) return false;
-  if (Boolean(input.alt) !== expectedAlt) return false;
-
-  if (expectedCommandOrControl) {
-    const hasCmdOrCtrl =
-      process.platform === "darwin"
-        ? Boolean(input.meta || input.control)
-        : Boolean(input.control);
-    if (!hasCmdOrCtrl) return false;
-  } else {
-    if (process.platform === "darwin") {
-      if (input.meta || input.control) return false;
-    } else if (input.control) {
-      return false;
-    }
-  }
-
-  if (expectedMeta && !input.meta) return false;
-  if (!expectedMeta && modifierTokens.has("meta") === false && input.meta) {
-    if (!expectedCommandOrControl) return false;
-  }
-
-  if (expectedControl && !input.control) return false;
-  if (
-    !expectedControl &&
-    modifierTokens.has("control") === false &&
-    input.control
-  ) {
-    if (!expectedCommandOrControl) return false;
-  }
-
-  return true;
-}
-
 function tryHandleOverlayShortcutLocalFallback(input: Electron.Input): boolean {
   const shortcuts = getConfiguredShortcuts();
   const handlers: Array<{