diff --git a/app/index.html b/app/index.html
index b9b030a..45d1a52 100644
--- a/app/index.html
+++ b/app/index.html
@@ -187,6 +187,8 @@ body {
 .sidebar::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 2px; }
 .sidebar::-webkit-scrollbar-track { background: var(--scrollbar-track); }
 
+.layout-sidebar .mobile-header { display: none; }
+
 /* ═══════════════════════════════════════════
    SIDEBAR CONTENT
    ═══════════════════════════════════════════ */
@@ -2018,7 +2020,6 @@ function fmtDatetime(dtStr) {
     const layout = el('div', { className: `layout-sidebar nav-${navPos}` });
 
     const mobileHeader = el('div', { className: 'mobile-header' });
-    mobileHeader.style.display = 'none';
     const hamburger = el('button', { className: 'hamburger', 'aria-label': 'Open menu' });
     hamburger.appendChild(iconEl('menu'));
     const mobileName = el('span', { className: 'sidebar-sitename', textContent: config.sitename || 'MD-CMS' });
@@ -2028,10 +2029,6 @@ function fmtDatetime(dtStr) {
     }
     mobileHeader.appendChild(mobileName);
 
-    const mobileStyle = document.createElement('style');
-    mobileStyle.textContent = `@media (max-width: 768px) { .layout-sidebar .mobile-header { display: flex !important; } }`;
-    document.head.appendChild(mobileStyle);
-
     const overlay = el('div', { className: 'mobile-overlay' });
     overlay.addEventListener('click', () => closeMobileMenu());