diff --git a/src/hooks/useKeyboard.ts b/src/hooks/useKeyboard.ts
index 3fa7c84..5dac829 100644
--- a/src/hooks/useKeyboard.ts
+++ b/src/hooks/useKeyboard.ts
@@ -17,6 +17,9 @@ export function useKeyboard(actions: CalculatorActions) {
 
   const handleKeyDown = useCallback(
     (e: KeyboardEvent) => {
+      const tag = (e.target as HTMLElement)?.tagName;
+      if (tag === 'INPUT' || tag === 'TEXTAREA') return;
+
       const mapped = KEY_MAP[e.key];
       if (!mapped) return;