diff --git a/script.js b/script.js
index 562d8bc..52327eb 100644
--- a/script.js
+++ b/script.js
@@ -1678,8 +1678,13 @@ This is a fully client-side application. Your content never leaves your browser
       exportMd.click();
     }
     if ((e.ctrlKey || e.metaKey) && e.key === "c") {
-      e.preventDefault();
-      copyMarkdownButton.click();
+      const activeEl = document.activeElement;
+      const isTextControl = activeEl && (activeEl.tagName === "TEXTAREA" || activeEl.tagName === "INPUT");
+      const hasSelection = window.getSelection && window.getSelection().toString().trim().length > 0;
+      if (!isTextControl && !hasSelection) {
+        e.preventDefault();
+        copyMarkdownButton.click();
+      }
     }
     // Story 1.2: Only allow sync toggle shortcut when in split view
     if ((e.ctrlKey || e.metaKey) && e.shiftKey && e.key === "S") {