diff --git a/public/pdf.html b/public/pdf.html
index 2b67e3d..310d813 100644
--- a/public/pdf.html
+++ b/public/pdf.html
@@ -1488,13 +1488,13 @@
             case 'pages':
                 if (state.pagesSubOp === 'rotate') {
                     url  = '/pdf/rotate';
-                    body = JSON.stringify({ fileId, pages: document.getElementById('rotatePages').value.trim(), angle: state.rotateAngle });
+                    body = JSON.stringify({ fileId, pages: (getSelectedPages('rotatePageGrid').length ? getSelectedPages('rotatePageGrid').join(',') : 'all'), angle: state.rotateAngle });
                 } else if (state.pagesSubOp === 'delete') {
                     url  = '/pdf/delete';
-                    body = JSON.stringify({ fileId, pages: document.getElementById('deletePages').value.trim() });
+                    body = JSON.stringify({ fileId, pages: getSelectedPages('deletePageGrid').join(',') });
                 } else {
-                    url  = '/pdf/rotate'; // reorder — map to rotate placeholder (backend decides)
-                    body = JSON.stringify({ fileId, reorder: document.getElementById('reorderPages').value.trim() });
+                    url  = '/pdf/reorder'; — map to rotate placeholder (backend decides)
+                    body = JSON.stringify({ fileId, order: Array.from(document.getElementById('reorderPageGrid').querySelectorAll('.page-thumb')).map(t => parseInt(t.dataset.page)) });
                 }
                 break;
             case 'watermark':