diff --git a/admin-spa/src/components/VerticalTabForm.tsx b/admin-spa/src/components/VerticalTabForm.tsx
index 9e33e4e..a632ebc 100644
--- a/admin-spa/src/components/VerticalTabForm.tsx
+++ b/admin-spa/src/components/VerticalTabForm.tsx
@@ -92,13 +92,15 @@ export function VerticalTabForm({ tabs, children, className }: VerticalTabFormPr
       {/* Content Area */}
       <div
         ref={contentRef}
-        className="flex-1 overflow-y-auto max-h-[calc(100vh-200px)] pr-2"
+        className="flex-1 overflow-y-auto pr-2"
       >
         {React.Children.map(children, (child) => {
           if (React.isValidElement(child) && child.props['data-section-id']) {
             const sectionId = child.props['data-section-id'];
+            const isActive = sectionId === activeTab;
             return React.cloneElement(child as React.ReactElement<any>, {
               ref: (el: HTMLElement) => registerSection(sectionId, el),
+              className: isActive ? '' : 'hidden',
             });
           }
           return child;
diff --git a/admin-spa/src/routes/Coupons/Edit.tsx b/admin-spa/src/routes/Coupons/Edit.tsx
index 9ad5261..6757668 100644
--- a/admin-spa/src/routes/Coupons/Edit.tsx
+++ b/admin-spa/src/routes/Coupons/Edit.tsx
@@ -89,7 +89,7 @@ export default function CouponEdit() {
   }
 
   return (
-    <div className="max-w-4xl">
+    <div>
       <CouponForm
         mode="edit"
         initial={coupon}
diff --git a/admin-spa/src/routes/Coupons/New.tsx b/admin-spa/src/routes/Coupons/New.tsx
index ff2d63e..a4c06f8 100644
--- a/admin-spa/src/routes/Coupons/New.tsx
+++ b/admin-spa/src/routes/Coupons/New.tsx
@@ -53,7 +53,7 @@ export default function CouponNew() {
   }, [createMutation.isPending, setPageHeader, clearPageHeader, navigate]);
 
   return (
-    <div className="max-w-4xl">
+    <div>
       <CouponForm
         mode="create"
         onSubmit={async (data) => {
diff --git a/admin-spa/src/routes/Coupons/components/CouponFilterSheet.tsx b/admin-spa/src/routes/Coupons/components/CouponFilterSheet.tsx
new file mode 100644
index 0000000..61e9923
--- /dev/null
+++ b/admin-spa/src/routes/Coupons/components/CouponFilterSheet.tsx
@@ -0,0 +1,80 @@
+import React, { useState } from 'react';
+import { __ } from '@/lib/i18n';
+import { Sheet, SheetContent, SheetHeader, SheetTitle } from '@/components/ui/sheet';
+import { Button } from '@/components/ui/button';
+import { Label } from '@/components/ui/label';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+
+interface CouponFilterSheetProps {
+  open: boolean;
+  onClose: () => void;
+  filters: {
+    discount_type: string;
+  };
+  onFiltersChange: (filters: { discount_type: string }) => void;
+  onReset: () => void;
+}
+
+export function CouponFilterSheet({
+  open,
+  onClose,
+  filters,
+  onFiltersChange,
+  onReset,
+}: CouponFilterSheetProps) {
+  const [localFilters, setLocalFilters] = useState(filters);
+
+  const handleApply = () => {
+    onFiltersChange(localFilters);
+    onClose();
+  };
+
+  const handleReset = () => {
+    setLocalFilters({ discount_type: '' });
+    onReset();
+    onClose();
+  };
+
+  return (
+    <Sheet open={open} onOpenChange={onClose}>
+      <SheetContent side="bottom" className="h-[400px]">
+        <SheetHeader>
+          <SheetTitle>{__('Filter Coupons')}</SheetTitle>
+        </SheetHeader>
+
+        <div className="mt-6 space-y-6">
+          {/* Discount Type */}
+          <div className="space-y-2">
+            <Label>{__('Discount Type')}</Label>
+            <Select
+              value={localFilters.discount_type || 'all'}
+              onValueChange={(value) =>
+                setLocalFilters({ ...localFilters, discount_type: value === 'all' ? '' : value })
+              }
+            >
+              <SelectTrigger>
+                <SelectValue placeholder={__('All types')} />
+              </SelectTrigger>
+              <SelectContent>
+                <SelectItem value="all">{__('All types')}</SelectItem>
+                <SelectItem value="percent">{__('Percentage')}</SelectItem>
+                <SelectItem value="fixed_cart">{__('Fixed Cart')}</SelectItem>
+                <SelectItem value="fixed_product">{__('Fixed Product')}</SelectItem>
+              </SelectContent>
+            </Select>
+          </div>
+        </div>
+
+        {/* Actions */}
+        <div className="absolute bottom-0 left-0 right-0 p-4 border-t bg-background flex gap-3">
+          <Button variant="outline" onClick={handleReset} className="flex-1">
+            {__('Reset')}
+          </Button>
+          <Button onClick={handleApply} className="flex-1">
+            {__('Apply Filters')}
+          </Button>
+        </div>
+      </SheetContent>
+    </Sheet>
+  );
+}
diff --git a/admin-spa/src/routes/Coupons/index.tsx b/admin-spa/src/routes/Coupons/index.tsx
index 0dc9ad1..40ee722 100644
--- a/admin-spa/src/routes/Coupons/index.tsx
+++ b/admin-spa/src/routes/Coupons/index.tsx
@@ -11,8 +11,9 @@ import { Input } from '@/components/ui/input';
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
 import { Checkbox } from '@/components/ui/checkbox';
 import { Badge } from '@/components/ui/badge';
-import { Trash2, RefreshCw, Edit, Tag } from 'lucide-react';
+import { Trash2, RefreshCw, Edit, Tag, Search, SlidersHorizontal } from 'lucide-react';
 import { useFABConfig } from '@/hooks/useFABConfig';
+import { CouponFilterSheet } from './components/CouponFilterSheet';
 
 export default function CouponsIndex() {
   const navigate = useNavigate();
@@ -21,9 +22,13 @@ export default function CouponsIndex() {
   const [search, setSearch] = useState('');
   const [discountType, setDiscountType] = useState('');
   const [selectedIds, setSelectedIds] = useState<number[]>([]);
+  const [filterSheetOpen, setFilterSheetOpen] = useState(false);
 
   // Configure FAB to navigate to new coupon page
-  useFABConfig('navigate', '/coupons/new');
+  useFABConfig('coupons');
+
+  // Count active filters
+  const activeFiltersCount = discountType && discountType !== 'all' ? 1 : 0;
 
   // Fetch coupons
   const { data, isLoading, isError, error, refetch } = useQuery({
@@ -110,69 +115,101 @@ export default function CouponsIndex() {
   const hasActiveFilters = search || (discountType && discountType !== 'all');
 
   return (
-    <div className="space-y-4">
-      {/* Toolbar */}
-      <div className="flex flex-col lg:flex-row lg:justify-between lg:items-center gap-3">
-        {/* Left: Bulk Actions */}
-        <div className="flex gap-3">
-          {/* Delete - Show only when items selected */}
-          {selectedIds.length > 0 && (
-            <button
-              className="border rounded-md px-3 py-2 text-sm bg-red-600 text-white hover:bg-red-700 disabled:opacity-50 inline-flex items-center gap-2"
-              onClick={handleBulkDelete}
-              disabled={deleteMutation.isPending}
-            >
-              <Trash2 className="w-4 h-4" />
-              {__('Delete')} ({selectedIds.length})
-            </button>
-          )}
+    <div className="space-y-4 w-full pb-4">
+      {/* Mobile: Search + Filter */}
+      <div className="md:hidden">
+        <div className="flex gap-2 items-center">
+          {/* Search Input */}
+          <div className="relative flex-1">
+            <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground" />
+            <input
+              value={search}
+              onChange={(e) => setSearch(e.target.value)}
+              placeholder={__('Search coupons...')}
+              className="w-full pl-10 pr-4 py-2.5 rounded-lg border border-border bg-background text-sm focus:outline-none focus:ring-2 focus:ring-primary focus:border-transparent"
+            />
+          </div>
 
-          {/* Refresh - Always visible (REQUIRED per SOP) */}
+          {/* Filter Button */}
           <button
-            className="border rounded-md px-3 py-2 text-sm hover:bg-accent disabled:opacity-50 inline-flex items-center gap-2"
-            onClick={() => refetch()}
-            disabled={isLoading}
+            onClick={() => setFilterSheetOpen(true)}
+            className="relative flex-shrink-0 p-2.5 rounded-lg border border-border bg-background hover:bg-accent transition-colors"
           >
-            <RefreshCw className="w-4 h-4" />
-            {__('Refresh')}
+            <SlidersHorizontal className="w-5 h-5" />
+            {activeFiltersCount > 0 && (
+              <span className="absolute -top-1 -right-1 w-5 h-5 bg-primary text-primary-foreground text-xs font-medium rounded-full flex items-center justify-center">
+                {activeFiltersCount}
+              </span>
+            )}
           </button>
         </div>
+      </div>
 
-        {/* Right: Filters */}
-        <div className="flex gap-3 flex-wrap items-center">
-          {/* Discount Type Filter */}
-          <Select value={discountType || undefined} onValueChange={(value) => setDiscountType(value || '')}>
-            <SelectTrigger className="w-[180px]">
-              <SelectValue placeholder={__('All types')} />
-            </SelectTrigger>
-            <SelectContent>
-              <SelectItem value="all">{__('All types')}</SelectItem>
-              <SelectItem value="percent">{__('Percentage')}</SelectItem>
-              <SelectItem value="fixed_cart">{__('Fixed Cart')}</SelectItem>
-              <SelectItem value="fixed_product">{__('Fixed Product')}</SelectItem>
-            </SelectContent>
-          </Select>
+      {/* Desktop Toolbar */}
+      <div className="hidden md:block rounded-lg border border-border p-4 bg-card">
+        <div className="flex flex-col lg:flex-row lg:justify-between lg:items-center gap-3">
+          
+          {/* Left: Bulk Actions */}
+          <div className="flex gap-3">
+            {/* Delete - Show only when items selected */}
+            {selectedIds.length > 0 && (
+              <button
+                className="border rounded-md px-3 py-2 text-sm bg-red-600 text-white hover:bg-red-700 disabled:opacity-50 inline-flex items-center gap-2"
+                onClick={handleBulkDelete}
+                disabled={deleteMutation.isPending}
+              >
+                <Trash2 className="w-4 h-4" />
+                {__('Delete')} ({selectedIds.length})
+              </button>
+            )}
 
-          {/* Search */}
-          <Input
-            placeholder={__('Search coupons...')}
-            value={search}
-            onChange={(e) => setSearch(e.target.value)}
-            className="w-[200px]"
-          />
-
-          {/* Reset Filters - Text link style per SOP */}
-          {hasActiveFilters && (
+            {/* Refresh - Always visible (REQUIRED per SOP) */}
             <button
-              className="text-sm text-muted-foreground hover:text-foreground underline"
-              onClick={() => {
-                setSearch('');
-                setDiscountType('');
-              }}
+              className="border rounded-md px-3 py-2 text-sm hover:bg-accent disabled:opacity-50 inline-flex items-center gap-2"
+              onClick={() => refetch()}
+              disabled={isLoading}
             >
-              {__('Clear filters')}
+              <RefreshCw className="w-4 h-4" />
+              {__('Refresh')}
             </button>
-          )}
+          </div>
+
+          {/* Right: Filters */}
+          <div className="flex gap-3 flex-wrap items-center">
+            {/* Discount Type Filter */}
+            <Select value={discountType || undefined} onValueChange={(value) => setDiscountType(value || '')}>
+              <SelectTrigger className="w-[180px]">
+                <SelectValue placeholder={__('All types')} />
+              </SelectTrigger>
+              <SelectContent>
+                <SelectItem value="all">{__('All types')}</SelectItem>
+                <SelectItem value="percent">{__('Percentage')}</SelectItem>
+                <SelectItem value="fixed_cart">{__('Fixed Cart')}</SelectItem>
+                <SelectItem value="fixed_product">{__('Fixed Product')}</SelectItem>
+              </SelectContent>
+            </Select>
+
+            {/* Search */}
+            <Input
+              placeholder={__('Search coupons...')}
+              value={search}
+              onChange={(e) => setSearch(e.target.value)}
+              className="w-[200px]"
+            />
+
+            {/* Reset Filters - Text link style per SOP */}
+            {hasActiveFilters && (
+              <button
+                className="text-sm text-muted-foreground hover:text-foreground underline"
+                onClick={() => {
+                  setSearch('');
+                  setDiscountType('');
+                }}
+              >
+                {__('Clear filters')}
+              </button>
+            )}
+          </div>
         </div>
       </div>
 
@@ -328,6 +365,15 @@ export default function CouponsIndex() {
           </div>
         </div>
       )}
+
+      {/* Mobile Filter Sheet */}
+      <CouponFilterSheet
+        open={filterSheetOpen}
+        onClose={() => setFilterSheetOpen(false)}
+        filters={{ discount_type: discountType }}
+        onFiltersChange={(filters) => setDiscountType(filters.discount_type)}
+        onReset={() => setDiscountType('')}
+      />
     </div>
   );
 }