diff --git a/assets/css/frontend/pages/submit.css b/assets/css/frontend/pages/submit.css
index 4cd84e46..a842a2b6 100644
--- a/assets/css/frontend/pages/submit.css
+++ b/assets/css/frontend/pages/submit.css
@@ -520,18 +520,11 @@ body.aksrt-editor-media-open {
   display: none !important;
 }
 
-.newposts-wrap .but-average {
-  display: flex;
-  align-items: stretch;
-  gap: 10px;
-}
-
-.newposts-wrap .but-average > * {
-  flex: 1 1 0;
-}
-
 .newposts-wrap .new-posts-submit {
+  display: inline-flex;
+  align-items: center;
   justify-content: center;
+  white-space: nowrap;
 }
 
 @media (max-width: 991px) {
diff --git a/templates/pages/page-submit.php b/templates/pages/page-submit.php
index 0ba6353a..2c871893 100644
--- a/templates/pages/page-submit.php
+++ b/templates/pages/page-submit.php
@@ -223,7 +223,7 @@ get_header();
 			}
 			?>
 			</div>
-			<aside class="sidebar">
+			<aside class="sidebar show-sidebar">
 				<?php \AKSRT\WidgetSystem\WidgetAreas::render('newposts_sidebar_top'); ?>
 				<?php
 				$terms = get_template_directory() . '/templates/parts/submit/sidebar-terms.php';
diff --git a/tests/widget-system/post-editor-reference-contract.test.cjs b/tests/widget-system/post-editor-reference-contract.test.cjs
index 46792eb6..1897ce62 100644
--- a/tests/widget-system/post-editor-reference-contract.test.cjs
+++ b/tests/widget-system/post-editor-reference-contract.test.cjs
@@ -39,10 +39,11 @@ test('front submit follows the reference newposts shell and cards', () => {
   const submitJs = read('assets/js/front-submit.js');
   const submitCss = read('assets/css/frontend/pages/submit.css');
   const mainCss = read('assets/css/main.css');
+  const mobileSubmitCss = submitCss.slice(submitCss.indexOf('@media (max-width: 991px)'));
 
   assert.match(page, /content-wrap newposts-wrap/);
   assert.match(page, /class="content-layout"/);
-  assert.match(page, /class="sidebar"/);
+  assert.match(page, /class="sidebar show-sidebar"/);
   assert.match(main, /zib-widget full-widget-sm editor-main-box/);
   assert.match(main, /relative newposts-title/);
   assert.match(terms, /newpost-cat-drop drop-select dropdown dependency-box/);
@@ -57,6 +58,10 @@ test('front submit follows the reference newposts shell and cards', () => {
   assert.match(pay, /pay-dawnload-edit/);
   assert.match(submit, /separator muted-3-color theme-box/);
   assert.match(submit, /new-posts-submit/);
+  assert.match(submitCss, /\.newposts-wrap \.new-posts-submit\s*{[^}]*display:\s*inline-flex;[^}]*white-space:\s*nowrap;/);
+  assert.doesNotMatch(submitCss, /\.newposts-wrap \.but-average\s*>\s*\*\s*{[^}]*flex:\s*1 1 0;/);
+  assert.match(mobileSubmitCss, /\.newposts-wrap\s*{[^}]*display:\s*block;/);
+  assert.match(mobileSubmitCss, /\.newposts-wrap > \.sidebar\s*{[^}]*width:\s*100%;/);
 });
 
 test('front submit paid resources use the reference modal editor and compact list', () => {