diff --git a/app/[locale]/catalog_page/products/page.tsx b/app/[locale]/catalog_page/products/page.tsx
index a2b1ae9..38359ee 100644
--- a/app/[locale]/catalog_page/products/page.tsx
+++ b/app/[locale]/catalog_page/products/page.tsx
@@ -8,7 +8,7 @@ export default function Page() {
   return (
     <div className="bg-[#1e1d1c] pb-30">
       <ProductBanner />
-      <div className="max-w-300 w-full mx-auto pt-8">
+      <div className="max-w-300 w-full mx-auto pt-4">
         <Breadcrumb customLabels={{ subCategory: subCategory.name }} />
       </div>
       <Products />
diff --git a/pages/products/filter/catalog.tsx b/pages/products/filter/catalog.tsx
new file mode 100644
index 0000000..43745bc
--- /dev/null
+++ b/pages/products/filter/catalog.tsx
@@ -0,0 +1,150 @@
+"use client";
+import { useTranslations } from "next-intl";
+import { ChevronDown, ChevronUp } from "lucide-react";
+import { useCatalogHook } from "./useCataloghook";
+import { useCatalog } from "@/zustand/useCatalog";
+import { AnimatePresence, motion } from "framer-motion";
+
+export function CatalogSection() {
+  const t = useTranslations();
+  const setParentID = useCatalog((state) => state.setParentID);
+  const parentID = useCatalog((state) => state.parentID);
+  const {
+    catalogSection,
+    catalogsectionChild,
+    setParent,
+    childLoading,
+    openDropdowns,
+    setOpenDropdowns,
+  } = useCatalogHook();
+
+  return (
+    <div className="p-2 border-y flex flex-col overflow-x-auto gap-2 lg:overflow-x-hidden items-start justify-start">
+      {/* ── Top-level categories ─────────────────────────────────────── */}
+      <div className="flex gap-4 items-center">
+        {catalogSection?.map((item: any) => (
+          <div key={item.id} className="flex gap-2">
+            <div
+              onClick={() => {
+                setParent(item.id);
+                setOpenDropdowns((prev) => (prev === item.id ? null : item.id));
+              }}
+              className="flex items-center gap-2"
+            >
+              <p
+                className={`whitespace-nowrap font-medium hover:cursor-pointer hover:text-red-500 transition-colors duration-150 ${
+                  openDropdowns === item.id ? "text-red-500" : ""
+                }`}
+              >
+                {item.name}
+              </p>
+
+              {item.children.length > 0 && (
+                <motion.span
+                  // Chevron rotates smoothly instead of swapping icons
+                  animate={{ rotate: openDropdowns === item.id ? 180 : 0 }}
+                  transition={{ duration: 0.25, ease: "easeInOut" }}
+                  className={`flex h-5 w-5 items-center justify-center rounded ${
+                    openDropdowns === item.id ? "text-red-500" : "text-gray-400"
+                  }`}
+                  aria-label="Dropdown icon"
+                >
+                  {/*
+                   * Single icon that rotates — replaces the ChevronUp/Down swap.
+                   * Logic unchanged: openDropdowns === item.id still drives it.
+                   */}
+                  <ChevronDown className="h-4 w-4" strokeWidth={2.5} />
+                </motion.span>
+              )}
+            </div>
+          </div>
+        ))}
+      </div>
+
+      {/* ── Sub-category dropdown — animated open/close ───────────────── */}
+      {/*
+       * AnimatePresence watches its children mount/unmount.
+       * The `key` on the motion.div is the open dropdown's id so that
+       * when you switch categories, the old panel exits and new one enters.
+       * All original conditional logic (catalogsectionChild, childLoading,
+       * .length > 0, t("subcategory_not_found")) is untouched.
+       */}
+      <AnimatePresence mode="wait">
+        {catalogsectionChild && openDropdowns !== null && (
+          <motion.div
+            key={openDropdowns} // re-mounts animation when category changes
+            initial={{ opacity: 0, height: 0, y: -6 }}
+            animate={{ opacity: 1, height: "auto", y: 0 }}
+            exit={{ opacity: 0, height: 0, y: -6 }}
+            transition={{
+              duration: 0.28,
+              ease: [0.25, 0.46, 0.45, 0.94], // smooth ease-out cubic
+            }}
+            style={{ overflow: "hidden" }} // required for height: 0 → auto
+            className="flex items-center gap-2 border-gray-400"
+          >
+            {childLoading ? (
+              // Loading skeleton — staggered pulse instead of plain text
+              <div className="flex gap-2 py-2">
+                {[1, 2, 3, 4].map((i) => (
+                  <motion.div
+                    key={i}
+                    className="h-5 rounded bg-gray-700"
+                    style={{ width: 72 + i * 12 }}
+                    animate={{ opacity: [0.4, 0.8, 0.4] }}
+                    transition={{
+                      duration: 1.2,
+                      repeat: Infinity,
+                      delay: i * 0.1,
+                      ease: "easeInOut",
+                    }}
+                  />
+                ))}
+              </div>
+            ) : catalogsectionChild.length > 0 ? (
+              <motion.div
+                className="flex items-center gap-0"
+                // Stagger each child item so they fan in one by one
+                variants={{
+                  show: { transition: { staggerChildren: 0.04 } },
+                  hidden: {},
+                }}
+                initial="hidden"
+                animate="show"
+              >
+                {catalogsectionChild.map((subItem: any) => (
+                  <motion.div
+                    key={subItem.id}
+                    variants={{
+                      hidden: { opacity: 0, x: -8 },
+                      show: { opacity: 1, x: 0 },
+                    }}
+                    transition={{ duration: 0.2, ease: "easeOut" }}
+                    onClick={() => setParentID(subItem.id)}
+                    className="border-l px-3 my-2 hover:cursor-pointer hover:text-red-500 text-white flex items-center justify-center"
+                  >
+                    <p
+                      className={`text-sm whitespace-nowrap transition-colors duration-150 ${
+                        parentID === subItem.id ? "text-red-500" : ""
+                      }`}
+                    >
+                      {subItem.name}
+                    </p>
+                  </motion.div>
+                ))}
+              </motion.div>
+            ) : (
+              <motion.p
+                initial={{ opacity: 0 }}
+                animate={{ opacity: 1 }}
+                className="text-sm text-gray-300 py-2"
+              >
+                {t("subcategory_not_found")}
+              </motion.p>
+            )}
+          </motion.div>
+        )}
+      </AnimatePresence>
+    </div>
+  );
+}
diff --git a/pages/products/filter/category.tsx b/pages/products/filter/category.tsx
new file mode 100644
index 0000000..0fcd263
--- /dev/null
+++ b/pages/products/filter/category.tsx
@@ -0,0 +1,87 @@
+"use client";
+import { useTranslations } from "next-intl";
+import { useCategoryHook } from "./useCategory";
+import { Check, ChevronDown, ChevronUp } from "lucide-react";
+
+export function Category() {
+  const t = useTranslations();
+  const {
+    categoryBack,
+    handleCategoryClick,
+    openDropdowns,
+    category,
+    subCategory,
+    handleSubCategoryClick,
+    subCategoryBack,
+    subCategoryLoading,
+  } = useCategoryHook();
+
+  return (
+    <div className="lg:space-y-2 space-x-6 lg:p-2 flex lg:flex-col overflow-x-auto lg:overflow-x-hidden items-start justify-start w-full">
+      {categoryBack?.map((item: any) => (
+        <div key={item.id} className="w-full">
+          {/* Main Category */}
+          <div onClick={() => handleCategoryClick(item)} className="">
+            <p
+              className={`whitespace-nowrap font-medium hover:cursor-pointer hover:text-red-500 ${category.id === item.id ? "text-red-500" : ""}`}
+            >
+              {item.name}
+            </p>
+            {item.have_sub_category && (
+              <span
+                className={`flex h-5 w-5 items-center justify-center rounded transition ${
+                  openDropdowns[item.id] ? "text-red-500" : "text-gray-400"
+                }`}
+                aria-label="Dropdown icon"
+              >
+                {openDropdowns[item.id] ? (
+                  <ChevronUp className="h-4 w-4" strokeWidth={2.5} />
+                ) : (
+                  <ChevronDown className="h-4 w-4" strokeWidth={2.5} />
+                )}
+              </span>
+            )}
+          </div>
+
+          {/* ⭐ YANGI: SubCategory Dropdown */}
+          {item.have_sub_category && openDropdowns[item.id] && (
+            <div className="space-y-2 border-l-2 border-gray-400 pl-3">
+              {subCategoryLoading ? (
+                <p className="text-sm text-gray-300">Yuklanmoqda...</p>
+              ) : subCategoryBack && subCategoryBack.length > 0 ? (
+                subCategoryBack.map((subItem: any) => (
+                  <div
+                    key={subItem.id}
+                    onClick={() => handleSubCategoryClick(subItem)}
+                    className="hover:cursor-pointer flex items-center gap-2 hover:bg-gray-600 p-1.5 rounded transition-colors"
+                  >
+                    <span
+                      className={`flex h-4 w-4 items-center justify-center rounded border-2 transition ${
+                        subCategory.id === subItem.id
+                          ? "border-red-600 bg-red-600"
+                          : "border-gray-400 bg-transparent"
+                      }`}
+                      aria-label="SubCategory checkbox"
+                    >
+                      {subCategory.id === subItem.id && (
+                        <Check
+                          className="h-2.5 w-2.5 text-white"
+                          strokeWidth={3}
+                        />
+                      )}
+                    </span>
+                    <p className="text-sm whitespace-nowrap">{subItem.name}</p>
+                  </div>
+                ))
+              ) : (
+                <p className="text-sm text-gray-300">
+                  {t("subcategory_not_found")}
+                </p>
+              )}
+            </div>
+          )}
+        </div>
+      ))}
+    </div>
+  );
+}
diff --git a/pages/products/filter/filter.tsx b/pages/products/filter/filter.tsx
index e4d1af8..a3a827e 100644
--- a/pages/products/filter/filter.tsx
+++ b/pages/products/filter/filter.tsx
@@ -1,34 +1,11 @@
-import { CatalogItem } from "@/lib/types";
-import httpClient from "@/request/api";
-import { endPoints } from "@/request/links";
-import { useQuery } from "@tanstack/react-query";
-import { ChevronDown } from "lucide-react";
+import { Category } from "./category";
+import { CatalogSection } from "./catalog";
 
 export default function Filter() {
-  const { data } = useQuery({
-    queryKey: ["catalogsection"],
-    queryFn: () => httpClient(endPoints.filter.catalog),
-    select: (res) => res?.data?.data?.results,
-  });
-
-  console.log("filter catalog: ", data);
   return (
-    <div className="px-5 w-full overflow-x-auto">
-      <div className="flex gap-5">
-        {data?.map((item: CatalogItem) => (
-          <div
-            key={item.id}
-            className="flex shrink-2 items-center text-white gap-2"
-          >
-            <div>{item.name}</div>
-            {item.children.length > 0 && (
-              <button>
-                <ChevronDown />
-              </button>
-            )}
-          </div>
-        ))}
-      </div>
+    <div className="space-y-1 lg:px-0 mb-2 px-3 w-full text-white ">
+      <Category />
+      <CatalogSection />
     </div>
   );
 }
diff --git a/pages/products/filter/useCataloghook.ts b/pages/products/filter/useCataloghook.ts
new file mode 100644
index 0000000..c030a8b
--- /dev/null
+++ b/pages/products/filter/useCataloghook.ts
@@ -0,0 +1,34 @@
+"use client";
+import httpClient from "@/request/api";
+import { endPoints } from "@/request/links";
+import { useQuery } from "@tanstack/react-query";
+import { useState } from "react";
+
+export const useCatalogHook = () => {
+  const [openDropdowns, setOpenDropdowns] = useState<number | undefined>(0);
+  const [parent, setParent] = useState(0);
+  const { data: catalogsectionChild, isLoading: childLoading } = useQuery({
+    queryKey: ["catalogsection/", parent],
+    queryFn: () => httpClient(endPoints.filter.child({ id: parent || 0 })),
+    select: (data) => data?.data?.data?.results,
+    enabled: !!openDropdowns,
+  });
+
+  const { data: catalogSection } = useQuery({
+    queryKey: ["catalogsection"],
+    queryFn: () => httpClient(endPoints.filter.catalogSection),
+    select: (data) => data?.data?.data?.results,
+  });
+
+  console.log({ catalogSection });
+  console.log({ catalogsectionChild });
+
+  return {
+    catalogSection,
+    catalogsectionChild,
+    setParent,
+    openDropdowns,
+    setOpenDropdowns,
+    childLoading,
+  };
+};
diff --git a/pages/products/filter/useCategory.ts b/pages/products/filter/useCategory.ts
new file mode 100644
index 0000000..e5a673b
--- /dev/null
+++ b/pages/products/filter/useCategory.ts
@@ -0,0 +1,78 @@
+import httpClient from "@/request/api";
+import { endPoints } from "@/request/links";
+import { useCategory } from "@/zustand/useCategory";
+import { useSubCategory } from "@/zustand/useSubCategory";
+import { useQuery } from "@tanstack/react-query";
+import { useState } from "react";
+
+export const useCategoryHook = () => {
+  const [openDropdowns, setOpenDropdowns] = useState<Record<number, boolean>>(
+    {},
+  );
+
+  const category = useCategory((state) => state.category);
+  const setCategory = useCategory((state) => state.setCategory);
+  const subCategory = useSubCategory((state) => state.subCategory);
+  const setSubCategory = useSubCategory((state) => state.setSubCategory);
+  const clearSubCategory = useSubCategory((state) => state.clearSubCategory);
+
+  // Category data
+  const { data: categoryBack } = useQuery({
+    queryKey: ["category"],
+    queryFn: () => httpClient(endPoints.category.all),
+    select: (data) => data?.data?.results,
+  });
+
+  const { data: subCategoryBack, isLoading: subCategoryLoading } = useQuery({
+    queryKey: ["subCategory", category.id],
+    queryFn: () => httpClient(endPoints.subCategory.byId(category.id)),
+    enabled:
+      !!category.id &&
+      category.have_sub_category === true &&
+      openDropdowns[category.id] === true,
+    select: (data) => data?.data?.results,
+  });
+
+  const handleCategoryClick = (item: any) => {
+    if (item.have_sub_category) {
+      // Agar subCategory bo'lsa, dropdown ochish/yopish
+      setOpenDropdowns((prev) => ({
+        ...prev,
+        [item.id]: !prev[item.id],
+      }));
+
+      // Category'ni set qilish (filterlar yangilanishi uchun)
+      setCategory(item);
+
+      // SubCategory'ni tozalash (yangisini tanlash uchun)
+      if (!openDropdowns[item.id]) {
+        clearSubCategory();
+      }
+    } else {
+      // Agar subCategory bo'lmasa, to'g'ridan-to'g'ri category ni set qilish
+      setCategory(item);
+      clearSubCategory();
+
+      // Barcha dropdown'larni yopish
+      setOpenDropdowns({});
+    }
+  };
+
+  const handleSubCategoryClick = (item: any) => {
+    setSubCategory(item);
+  };
+
+  return {
+    category,
+    setCategory,
+    subCategory,
+    setSubCategory,
+    clearSubCategory,
+    categoryBack,
+    subCategoryBack,
+    subCategoryLoading,
+    handleCategoryClick,
+    handleSubCategoryClick,
+    openDropdowns,
+  };
+};
diff --git a/pages/products/product/mianProduct.tsx b/pages/products/product/mianProduct.tsx
index 24f4c20..f5cdbbf 100644
--- a/pages/products/product/mianProduct.tsx
+++ b/pages/products/product/mianProduct.tsx
@@ -10,6 +10,7 @@ import { useProductPageInfo } from "@/zustand/useProduct";
 import { useSubCategory } from "@/zustand/useSubCategory";
 import { useTranslations } from "next-intl";
 import PaginationLite from "@/components/paginationUI";
+import { useCatalog } from "@/zustand/useCatalog";
 
 export default function MainProduct() {
   const t = useTranslations();
@@ -18,6 +19,7 @@ export default function MainProduct() {
   const filter = useFilter((s) => s.filter);
   const getFiltersByType = useFilter((s) => s.getFiltersByType);
   const setProduct = useProductPageInfo((s) => s.setProducts);
+  const parentID = useCatalog((state) => state.parentID);
 
   const [currentPage, setCurrentPage] = useState(1);
 
@@ -34,7 +36,9 @@ export default function MainProduct() {
   const requestLink = useMemo(() => {
     const baseLink = category.have_sub_category
       ? endPoints.product.bySubCategory({ id: subCategory.id, currentPage })
-      : endPoints.product.byCategory({ id: category.id, currentPage });
+      : parentID
+        ? endPoints.product.byCatalogSection({ id: parentID, currentPage })
+        : endPoints.product.byCategory({ id: category.id, currentPage });
     return `${baseLink}${queryParams}`;
   }, [
     category.id,
diff --git a/pages/products/product/products.tsx b/pages/products/product/products.tsx
index 84ce45f..86702ad 100644
--- a/pages/products/product/products.tsx
+++ b/pages/products/product/products.tsx
@@ -5,7 +5,7 @@ export function Products() {
   return (
     <div className="bg-[#1e1d1c] pb-10 pt-5 px-2">
       <div className="max-w-300 mx-auto w-full z-20 relative">
-        <div className="flex flex-col items-start gap-5">
+        <div className="flex flex-col items-start gap-2">
           {/* filter part */}
           <Filter />
 
diff --git a/request/links.ts b/request/links.ts
index 80ab424..7d195c1 100644
--- a/request/links.ts
+++ b/request/links.ts
@@ -29,6 +29,13 @@ export const endPoints = {
 
       return link;
     },
+    byCatalogSection: ({ id, currentPage }: ProductTypes) => {
+      let link = "product";
+      if (id) link += `?catalog_section=${id}`;
+      if (currentPage) link += `&page=${currentPage}`;
+
+      return link;
+    },
     detail: (id: number) => `product/${id}/`,
   },
   faq: "faq/",
@@ -41,9 +48,18 @@ export const endPoints = {
   normative: "document/?type=normative",
   guides: "guide/",
   filter: {
-    catalog: "catalogsection/?page_size=500",
-    child: (parenId: number) =>
-      `catalogsection/?page_size=500&parent=${parenId}`,
+    size: "size/",
+    sizePageItems: "size/?page_size=500",
+    sizeCategoryId: (id: number) => `size/?category=${id}&page_size=500`,
+    catalog: "catalog/",
+    catalogPageItems: "catalog/?page_size=500",
+    catalogCategoryId: (id: number) => `catalog/?category=${id}&page_size=500`,
+    child: ({ id }: { id?: number }) => {
+      const link = "catalogsection/?page_size=500";
+      if (id) return `${link}&parent=${id}`;
+      return link;
+    },
+    catalogSection: "catalogsection/?page_size=500",
   },
   post: {
     sendNumber: "callBack/",
diff --git a/zustand/useCatalog.ts b/zustand/useCatalog.ts
new file mode 100644
index 0000000..cc84c6b
--- /dev/null
+++ b/zustand/useCatalog.ts
@@ -0,0 +1,13 @@
+import { create } from "zustand";
+
+type CatalogType = {
+  parentID: number;
+  setParentID: (id: number) => void;
+};
+
+export const useCatalog = create<CatalogType>((set) => {
+  return {
+    parentID: 0,
+    setParentID: (id: number) => set({ parentID: id }),
+  };
+});