fix: redesign top bar and filter panel for mobile

- Split top bar into two rows on mobile: title + filter icon, then
  full-width search below
- Desktop keeps single-row layout with search and filter inline
- Filter button: icon-only on mobile with active indicator dot
- Filter panel: full-screen overlay with backdrop on mobile,
  inline dropdown on desktop
- Outside-click closes filter panel
- Removed subtitle (only on desktop, saves space)

src/pages/ReferralNetwork/ReferralNetwork.tsx

@@ -34,20 +34,29 @@ export function ReferralNetwork() {
       className="relative flex h-[calc(100dvh-64px)] flex-col overflow-hidden bg-[#0a0a0f]"
     >
       {/* Top bar */}
-      <div className="relative z-20 flex shrink-0 items-center gap-3 border-b border-dark-700/50 bg-dark-900/90 px-4 py-3 backdrop-blur-md">
+      <div className="relative z-20 shrink-0 border-b border-dark-700/50 bg-dark-900/90 backdrop-blur-md">
+        {/* Row 1: Back + Title + (desktop: search + filter) + (mobile: filter icon) */}
+        <div className="flex items-center gap-3 px-3 py-2 sm:px-4 sm:py-3">
           <AdminBackButton />
-        <div className="mr-2 min-w-0">
+          <h1 className="min-w-0 truncate text-sm font-bold text-dark-100 sm:text-lg">
-          <h1 className="truncate text-sm font-bold text-dark-100 sm:text-lg">
             {t('admin.referralNetwork.title')}
           </h1>
-          <p className="hidden text-xs text-dark-500 sm:block">
+          {/* Desktop: search + filter inline */}
-            {t('admin.referralNetwork.subtitle')}
+          <div className="hidden flex-1 items-center gap-2 sm:flex">
-          </p>
-        </div>
-        <div className="flex flex-1 items-center gap-2">
             <NetworkSearch className="max-w-md flex-1" />
             {networkData && <NetworkFilters data={networkData} />}
           </div>
+          {/* Mobile: filter icon only */}
+          {networkData && (
+            <div className="ml-auto sm:hidden">
+              <NetworkFilters data={networkData} />
+            </div>
+          )}
+        </div>
+        {/* Row 2 (mobile only): full-width search */}
+        <div className="px-3 pb-2 sm:hidden">
+          <NetworkSearch className="w-full" />
+        </div>
       </div>
 
       {/* Main content area */}

src/pages/ReferralNetwork/components/NetworkFilters.tsx

@@ -1,3 +1,4 @@
+import { useEffect, useRef } from 'react';
 import { useTranslation } from 'react-i18next';
 import { useReferralNetworkStore } from '@/store/referralNetwork';
 import type { NetworkGraphData } from '@/types/referralNetwork';
@@ -9,6 +10,7 @@ interface NetworkFiltersProps {
 
 export function NetworkFilters({ data, className }: NetworkFiltersProps) {
   const { t } = useTranslation();
+  const panelRef = useRef<HTMLDivElement>(null);
 
   const filters = useReferralNetworkStore((s) => s.filters);
   const updateFilters = useReferralNetworkStore((s) => s.updateFilters);
@@ -16,6 +18,21 @@ export function NetworkFilters({ data, className }: NetworkFiltersProps) {
   const isOpen = useReferralNetworkStore((s) => s.isFiltersOpen);
   const setIsOpen = useReferralNetworkStore((s) => s.setIsFiltersOpen);
 
+  const hasActiveFilters =
+    filters.campaigns.length > 0 || filters.partnersOnly || filters.minReferrals > 0;
+
+  // Close on outside click
+  useEffect(() => {
+    if (!isOpen) return;
+    function handleClick(e: MouseEvent) {
+      if (panelRef.current && !panelRef.current.contains(e.target as Node)) {
+        setIsOpen(false);
+      }
+    }
+    document.addEventListener('mousedown', handleClick);
+    return () => document.removeEventListener('mousedown', handleClick);
+  }, [isOpen, setIsOpen]);
+
   function toggleCampaign(campaignId: number) {
     const current = filters.campaigns;
     const next = current.includes(campaignId)
@@ -24,12 +41,13 @@ export function NetworkFilters({ data, className }: NetworkFiltersProps) {
     updateFilters({ campaigns: next });
   }
 
+  // Trigger button
   if (!isOpen) {
     return (
       <button
         onClick={() => setIsOpen(true)}
         aria-label={t('admin.referralNetwork.filters.title')}
-        className={`flex items-center gap-2 rounded-lg border border-dark-700/50 bg-dark-800/80 px-3 py-2 text-sm text-dark-300 transition-colors hover:border-dark-600 hover:text-dark-100 ${className ?? ''}`}
+        className={`relative flex shrink-0 items-center gap-2 rounded-lg border border-dark-700/50 bg-dark-800/80 px-2.5 py-2 text-sm text-dark-300 transition-colors hover:border-dark-600 hover:text-dark-100 ${className ?? ''}`}
       >
         <svg
           className="h-4 w-4"
@@ -44,36 +62,16 @@ export function NetworkFilters({ data, className }: NetworkFiltersProps) {
             d="M10.5 6h9.75M10.5 6a1.5 1.5 0 11-3 0m3 0a1.5 1.5 0 10-3 0M3.75 6H7.5m3 12h9.75m-9.75 0a1.5 1.5 0 01-3 0m3 0a1.5 1.5 0 00-3 0m-3.75 0H7.5m9-6h3.75m-3.75 0a1.5 1.5 0 01-3 0m3 0a1.5 1.5 0 00-3 0m-9.75 0h9.75"
           />
         </svg>
-        {t('admin.referralNetwork.filters.title')}
+        <span className="hidden sm:inline">{t('admin.referralNetwork.filters.title')}</span>
+        {hasActiveFilters && (
+          <span className="absolute -right-1 -top-1 h-2 w-2 rounded-full bg-accent-500" />
+        )}
       </button>
     );
   }
 
-  return (
+  // Filter panel content (shared between mobile/desktop)
-    <div
+  const panelContent = (
-      className={`rounded-xl border border-dark-700/50 bg-dark-900/90 p-4 backdrop-blur-md ${className ?? ''}`}
-    >
-      <div className="mb-3 flex items-center justify-between">
-        <h3 className="text-sm font-semibold text-dark-100">
-          {t('admin.referralNetwork.filters.title')}
-        </h3>
-        <button
-          onClick={() => setIsOpen(false)}
-          aria-label={t('common.close')}
-          className="text-dark-500 transition-colors hover:text-dark-300"
-        >
-          <svg
-            className="h-4 w-4"
-            fill="none"
-            viewBox="0 0 24 24"
-            stroke="currentColor"
-            strokeWidth={2}
-          >
-            <path strokeLinecap="round" strokeLinejoin="round" d="M6 18L18 6M6 6l12 12" />
-          </svg>
-        </button>
-      </div>
-
     <div className="space-y-4">
       {/* Campaigns */}
       {data.campaigns.length > 0 && (
@@ -135,6 +133,66 @@ export function NetworkFilters({ data, className }: NetworkFiltersProps) {
         {t('admin.referralNetwork.filters.reset')}
       </button>
     </div>
+  );
+
+  return (
+    <div ref={panelRef} className={className}>
+      {/* Desktop: inline dropdown */}
+      <div className="hidden sm:block">
+        <div className="w-64 rounded-xl border border-dark-700/50 bg-dark-900/95 p-4 backdrop-blur-md">
+          <div className="mb-3 flex items-center justify-between">
+            <h3 className="text-sm font-semibold text-dark-100">
+              {t('admin.referralNetwork.filters.title')}
+            </h3>
+            <button
+              onClick={() => setIsOpen(false)}
+              aria-label={t('common.close')}
+              className="text-dark-500 transition-colors hover:text-dark-300"
+            >
+              <svg
+                className="h-4 w-4"
+                fill="none"
+                viewBox="0 0 24 24"
+                stroke="currentColor"
+                strokeWidth={2}
+              >
+                <path strokeLinecap="round" strokeLinejoin="round" d="M6 18L18 6M6 6l12 12" />
+              </svg>
+            </button>
+          </div>
+          {panelContent}
+        </div>
+      </div>
+
+      {/* Mobile: full-width overlay below top bar */}
+      <div className="fixed inset-x-0 top-0 z-50 sm:hidden">
+        {/* Backdrop */}
+        <div className="fixed inset-0 bg-black/60" onClick={() => setIsOpen(false)} />
+        {/* Panel */}
+        <div className="relative mx-3 mt-3 rounded-xl border border-dark-700/50 bg-dark-900/95 p-4 backdrop-blur-md">
+          <div className="mb-3 flex items-center justify-between">
+            <h3 className="text-sm font-semibold text-dark-100">
+              {t('admin.referralNetwork.filters.title')}
+            </h3>
+            <button
+              onClick={() => setIsOpen(false)}
+              aria-label={t('common.close')}
+              className="rounded-lg p-1 text-dark-500 transition-colors hover:bg-dark-800 hover:text-dark-300"
+            >
+              <svg
+                className="h-5 w-5"
+                fill="none"
+                viewBox="0 0 24 24"
+                stroke="currentColor"
+                strokeWidth={2}
+              >
+                <path strokeLinecap="round" strokeLinejoin="round" d="M6 18L18 6M6 6l12 12" />
+              </svg>
+            </button>
+          </div>
+          {panelContent}
+        </div>
+      </div>
     </div>
   );
 }