diff --git a/src/components/CategoriesDock.css b/src/components/CategoriesDock.css
index 82fe018..9de76e0 100644
--- a/src/components/CategoriesDock.css
+++ b/src/components/CategoriesDock.css
@@ -1,31 +1,47 @@
 .categories-dock {
   position: fixed;
   bottom: 18px;
-  left: 50%;
-  transform: translateX(-50%);
+  left: 0;
+  right: 0;
   z-index: 80;
   width: min(var(--max-container), calc(100vw - 48px));
+  margin-inline: auto;
   padding: 14px 24px;
   border-radius: 28px;
-  border: 1px solid rgba(255, 255, 255, 0.7);
-  background:
-    linear-gradient(
-      165deg,
-      rgba(255, 255, 255, 0.72) 0%,
-      rgba(255, 247, 241, 0.55) 45%,
-      rgba(255, 255, 255, 0.4) 100%
-    );
-  backdrop-filter: blur(18px) saturate(160%);
-  -webkit-backdrop-filter: blur(18px) saturate(160%);
-  box-shadow:
-    0 10px 36px rgba(143, 65, 12, 0.14),
-    0 2px 8px rgba(0, 0, 0, 0.04),
-    inset 0 1px 0 rgba(255, 255, 255, 0.85),
-    inset 0 -1px 0 rgba(143, 65, 12, 0.04);
+  background: transparent;
+  border: none;
+  box-shadow: none;
   pointer-events: auto;
 }
 
+/* Glass layer without transform — backdrop-filter breaks when combined
+   with transform / overflow-hidden ancestors in Chromium. */
+.categories-dock__glass {
+  position: absolute;
+  inset: 0;
+  z-index: 0;
+  border-radius: inherit;
+  border: 1px solid rgba(255, 255, 255, 0.72);
+  background:
+    linear-gradient(
+      165deg,
+      rgba(255, 255, 255, 0.58) 0%,
+      rgba(255, 247, 241, 0.42) 45%,
+      rgba(255, 255, 255, 0.28) 100%
+    );
+  backdrop-filter: blur(20px) saturate(170%);
+  -webkit-backdrop-filter: blur(20px) saturate(170%);
+  box-shadow:
+    0 10px 36px rgba(143, 65, 12, 0.14),
+    0 2px 8px rgba(0, 0, 0, 0.04),
+    inset 0 1px 0 rgba(255, 255, 255, 0.9),
+    inset 0 -1px 0 rgba(143, 65, 12, 0.05);
+  pointer-events: none;
+}
+
 .categories-dock__list {
+  position: relative;
+  z-index: 1;
   display: flex;
   align-items: center;
   justify-content: space-between;
diff --git a/src/components/CategoriesDock.tsx b/src/components/CategoriesDock.tsx
index 88a089d..a666881 100644
--- a/src/components/CategoriesDock.tsx
+++ b/src/components/CategoriesDock.tsx
@@ -1,9 +1,12 @@
+import { createPortal } from 'react-dom'
 import { Link } from 'react-router-dom'
 import './CategoriesDock.css'
 
 /**
  * Fixed glossy dock — images and labels are hardcoded.
  * Slugs match production API categories on shirinibalout.com.
+ * Portaled to document.body so backdrop-filter is not killed by
+ * overflow-x: hidden / transform on .app ancestors.
  */
 const DOCK_CATEGORIES = [
   {
@@ -45,8 +48,9 @@ const DOCK_CATEGORIES = [
 ] as const
 
 export default function CategoriesDock() {
-  return (
+  return createPortal(
     <nav className="categories-dock" aria-label="دسته‌بندی محصولات">
+      <div className="categories-dock__glass" aria-hidden="true" />
       <ul className="categories-dock__list">
         {DOCK_CATEGORIES.map((category) => (
           <li key={category.slug} className="categories-dock__item">
@@ -65,6 +69,7 @@ export default function CategoriesDock() {
           </li>
         ))}
       </ul>
-    </nav>
+    </nav>,
+    document.body,
   )
 }