diff --git a/App.tsx b/App.tsx
index 03bfa84..6b8a8d5 100644
--- a/App.tsx
+++ b/App.tsx
@@ -652,11 +652,11 @@ const App: React.FC = () => {
     <div className="min-h-screen flex flex-col bg-background text-slate-200">
 
       {/* Header */}
-      <header className="bg-slate-950/90 backdrop-blur border-b border-border py-4 px-6 relative z-40 shadow-2xl">
+      <header className="bg-slate-950/90 backdrop-blur border-b border-border py-2 px-3 md:py-4 md:px-6 relative z-40 shadow-2xl">
         <div className="max-w-7xl mx-auto flex justify-between items-center">
-          <div className="flex items-center gap-8">
-            {/* Logo Container (Horizontal Box) - Persistent User Image */}
-            <div className="h-16 w-64 relative flex-shrink-0">
+          <div className="flex items-center gap-3 md:gap-8">
+            {/* Logo Container - Smaller on mobile */}
+            <div className="h-10 w-32 md:h-16 md:w-64 relative flex-shrink-0">
               <CrazeLogo />
             </div>
 
@@ -677,63 +677,62 @@ const App: React.FC = () => {
             </div>
           </div>
 
-          <div className="flex items-center gap-6">
+          <div className="flex items-center gap-3 md:gap-6">
             {/* Force Sync Action */}
             <button
               onClick={() => { handleDataFetch(); handleAdsFetch(); handleTrafficFetch(); handleVendorStockFetch(); handleBuyBoxFetch(); }}
               disabled={syncing}
-              className={`flex items-center gap-2 px-4 py-2 rounded-xl text-sm font-black uppercase tracking-widest transition-all
+              className={`flex items-center gap-2 px-3 py-1.5 md:px-4 md:py-2 rounded-xl text-sm font-black uppercase tracking-widest transition-all
                 ${syncing
                   ? 'bg-indigo-500/20 text-indigo-400 border border-indigo-500/30'
                   : 'bg-slate-900 text-slate-300 border border-border hover:border-indigo-500/50 hover:text-white shadow-lg active:scale-95'}`}
             >
               <RefreshIcon className={`w-4 h-4 ${syncing ? 'animate-spin' : ''}`} />
-              <span>{syncing ? 'Syncing...' : 'Sync Now'}</span>
+              <span className="hidden sm:inline">{syncing ? 'Syncing...' : 'Sync Now'}</span>
             </button>
-            {/* View Switcher is the priority now */}
-            {/* View Switcher */}
-            <div className="flex bg-slate-900 rounded-lg p-1 border border-border">
+            {/* View Switcher - Hidden on mobile (shown in bottom nav instead) */}
+            <div className="hidden md:flex bg-slate-900 rounded-lg p-1 border border-border">
               <button
                 onClick={() => setView('dashboard')}
                 className={`flex items-center gap-2 px-3 py-2 rounded-md text-sm font-medium transition-all
                   ${view === 'dashboard' ? 'bg-slate-800 text-white shadow-sm ring-1 ring-white/10' : 'text-slate-400 hover:text-white hover:bg-slate-800/50'}`}
               >
-                <ChartIcon /> <span className="hidden sm:inline">Dashboard</span>
+                <ChartIcon /> <span className="hidden lg:inline">Dashboard</span>
               </button>
               <button
                 onClick={() => setView('table')}
                 className={`flex items-center gap-2 px-3 py-2 rounded-md text-sm font-medium transition-all
                   ${view === 'table' ? 'bg-slate-800 text-white shadow-sm ring-1 ring-white/10' : 'text-slate-400 hover:text-white hover:bg-slate-800/50'}`}
               >
-                <TableIcon /> <span className="hidden sm:inline">Grid</span>
+                <TableIcon /> <span className="hidden lg:inline">Grid</span>
               </button>
               <button
                 onClick={() => setView('weekly')}
                 className={`flex items-center gap-2 px-3 py-2 rounded-md text-sm font-medium transition-all
                   ${view === 'weekly' ? 'bg-slate-800 text-white shadow-sm ring-1 ring-white/10' : 'text-slate-400 hover:text-white hover:bg-slate-800/50'}`}
               >
-                <TrendingIcon /> <span className="hidden sm:inline">Weekly Sales</span>
+                <TrendingIcon /> <span className="hidden lg:inline">Weekly Sales</span>
               </button>
               <button
                 onClick={() => setView('movers')}
                 className={`flex items-center gap-2 px-3 py-2 rounded-md text-sm font-medium transition-all
                   ${view === 'movers' ? 'bg-slate-800 text-white shadow-sm ring-1 ring-white/10' : 'text-slate-400 hover:text-white hover:bg-slate-800/50'}`}
               >
-                <TrendingIcon /> <span className="hidden sm:inline">Movers</span>
+                <TrendingIcon /> <span className="hidden lg:inline">Movers</span>
               </button>
               <button
                 onClick={() => setView('ads')}
                 className={`flex items-center gap-2 px-3 py-2 rounded-md text-sm font-medium transition-all
                   ${view === 'ads' ? 'bg-slate-800 text-white shadow-sm ring-1 ring-white/10' : 'text-slate-400 hover:text-white hover:bg-slate-800/50'}`}
               >
-                <MegaphoneIcon /> <span className="hidden sm:inline">Ads</span>
+                <MegaphoneIcon /> <span className="hidden lg:inline">Ads</span>
               </button>
               <button
                 onClick={() => setView('forecast')}
                 className={`flex items-center gap-2 px-3 py-2 rounded-md text-sm font-medium transition-all
                   ${view === 'forecast' ? 'bg-slate-800 text-white shadow-sm ring-1 ring-white/10' : 'text-slate-400 hover:text-white hover:bg-slate-800/50'}`}
               >
-                <ChartIcon /> <span className="hidden sm:inline">Fc 26</span>
+                <ChartIcon /> <span className="hidden lg:inline">Fc 26</span>
               </button>
             </div>
           </div>
@@ -850,6 +849,30 @@ const App: React.FC = () => {
       {/* Chat Assistant */}
       <AIChat onSendMessage={handleAskGemini} isOpen={isChatOpen} setIsOpen={setIsChatOpen} />
 
+      {/* Mobile Bottom Navigation */}
+      <nav className="fixed bottom-0 left-0 right-0 z-50 bg-slate-950/95 backdrop-blur border-t border-border md:hidden pb-safe">
+        <div className="grid grid-cols-6 gap-0">
+          {([
+            { key: 'dashboard' as const, icon: <ChartIcon />, label: 'Home' },
+            { key: 'table' as const, icon: <TableIcon />, label: 'Grid' },
+            { key: 'weekly' as const, icon: <TrendingIcon />, label: 'Weekly' },
+            { key: 'movers' as const, icon: <TrendingIcon />, label: 'Movers' },
+            { key: 'ads' as const, icon: <MegaphoneIcon />, label: 'Ads' },
+            { key: 'forecast' as const, icon: <ChartIcon />, label: 'Fc 26' },
+          ]).map(({ key, icon, label }) => (
+            <button
+              key={key}
+              onClick={() => setView(key)}
+              className={`flex flex-col items-center justify-center py-2 gap-0.5 transition-colors
+                ${view === key ? 'text-primary' : 'text-slate-500 active:text-slate-300'}`}
+            >
+              {icon}
+              <span className="text-[9px] font-bold uppercase tracking-wider">{label}</span>
+            </button>
+          ))}
+        </div>
+      </nav>
+
       {/* DATA MODAL */}
       {
         isDataModalOpen && (
diff --git a/components/AIChat.tsx b/components/AIChat.tsx
index 56c4cc0..c6fecce 100644
--- a/components/AIChat.tsx
+++ b/components/AIChat.tsx
@@ -93,21 +93,21 @@ const AIChat: React.FC<AIChatProps> = ({ onSendMessage, isOpen, setIsOpen }) =>
 
   return (
     <>
-      {/* Trigger Button */}
+      {/* Trigger Button - above bottom nav on mobile */}
       <button
         onClick={() => setIsOpen(!isOpen)}
-        className={`fixed bottom-6 right-6 z-50 p-4 rounded-full shadow-2xl transition-all duration-300 hover:scale-110 
+        className={`fixed bottom-20 right-4 md:bottom-6 md:right-6 z-50 p-3 md:p-4 rounded-full shadow-2xl transition-all duration-300 hover:scale-110
           ${isOpen ? 'bg-slate-700 rotate-90 opacity-0 pointer-events-none' : 'bg-primary text-white rotate-0 opacity-100'}`}
       >
         <ChatIcon />
       </button>
 
-      {/* Chat Window */}
+      {/* Chat Window - fullscreen on mobile, floating on desktop */}
       <div
-        className={`fixed z-50 bg-slate-900 border border-border shadow-2xl transition-all duration-300 flex flex-col overflow-hidden
+        className={`fixed z-[60] bg-slate-900 border border-border shadow-2xl transition-all duration-300 flex flex-col overflow-hidden
         ${isOpen
-            ? 'bottom-6 right-6 w-96 h-[600px] rounded-2xl opacity-100 translate-y-0'
-            : 'bottom-6 right-6 w-96 h-0 opacity-0 translate-y-10 pointer-events-none'}`}
+            ? 'inset-0 rounded-none md:inset-auto md:bottom-6 md:right-6 md:w-96 md:h-[600px] md:rounded-2xl opacity-100 translate-y-0'
+            : 'bottom-0 right-0 w-full h-0 md:bottom-6 md:right-6 md:w-96 opacity-0 translate-y-10 pointer-events-none'}`}
       >
         {/* Header */}
         <div className="bg-primary/10 p-4 border-b border-border flex justify-between items-center backdrop-blur">
diff --git a/components/AdsPerformance.tsx b/components/AdsPerformance.tsx
index 8f164ea..71a5475 100644
--- a/components/AdsPerformance.tsx
+++ b/components/AdsPerformance.tsx
@@ -363,10 +363,10 @@ const AdsPerformance: React.FC<AdsPerformanceProps> = ({
     }, [filteredAndSorted]);
 
     return (
-        <div className="flex flex-col gap-6 animate-fade-in p-6 bg-[#0B0E14] min-h-screen text-slate-300">
+        <div className="flex flex-col gap-4 md:gap-6 animate-fade-in p-3 md:p-6 bg-[#0B0E14] min-h-screen text-slate-300">
             <div className="flex justify-between items-end">
                 <div>
-                    <h1 className="text-2xl font-bold text-white mb-1">Performance Overview</h1>
+                    <h1 className="text-lg md:text-2xl font-bold text-white mb-1">Performance Overview</h1>
                     <div className="flex items-center gap-2 text-xs text-slate-400">
                         <span className="w-2 h-2 rounded-full bg-emerald-500"></span>
                         <span>
@@ -376,7 +376,7 @@ const AdsPerformance: React.FC<AdsPerformanceProps> = ({
                 </div>
             </div>
 
-            <div className="grid grid-cols-2 md:grid-cols-4 lg:grid-cols-7 xl:grid-cols-13 gap-4 bg-[#141820] p-4 rounded-xl border border-white/5 shadow-xl">
+            <div className="grid grid-cols-2 md:grid-cols-4 lg:grid-cols-7 xl:grid-cols-13 gap-2 md:gap-4 bg-[#141820] p-2 md:p-4 rounded-xl border border-white/5 shadow-xl">
                 <SummaryCard label="TOTAL SALES" value={totals.curr.salesTotal} prevValue={totals.prev?.salesTotal} format="currency" color="text-emerald-400" />
                 <SummaryCard label="ADS SALES" value={totals.curr.salesAds} prevValue={totals.prev?.salesAds} format="currency" color="text-orange-400" />
                 <SummaryCard label="ORGANIC SALES" value={totals.curr.salesOrganic} prevValue={totals.prev?.salesOrganic} format="currency" color="text-blue-400" />
@@ -395,7 +395,7 @@ const AdsPerformance: React.FC<AdsPerformanceProps> = ({
             </div>
 
             <div className="bg-[#141820] rounded-xl border border-white/10 overflow-hidden shadow-2xl flex-1 flex flex-col">
-                <div className="p-4 border-b border-white/5 flex justify-between items-center bg-[#1A1F29]">
+                <div className="p-2 md:p-4 border-b border-white/5 flex flex-wrap justify-between items-center gap-2 bg-[#1A1F29]">
                     <div>
                         <h2 className="text-sm font-bold text-white uppercase tracking-wider">Product Inventory</h2>
                         <p className="text-[10px] text-slate-400 mt-0.5">
@@ -428,8 +428,8 @@ const AdsPerformance: React.FC<AdsPerformanceProps> = ({
                     </div>
                 </div>
 
-                <div className="overflow-x-auto flex-1 custom-scrollbar">
-                    <table className="w-full text-left border-collapse text-[11px]">
+                <div className="overflow-x-auto flex-1 custom-scrollbar scroll-touch">
+                    <table className="w-full text-left border-collapse text-[10px] md:text-[11px]">
                         <thead className="sticky top-0 z-20 bg-[#1A1F29]">
                             <tr className="border-b border-white/5">
                                 <th className="p-4 font-black text-slate-400 uppercase tracking-widest min-w-[250px]">
diff --git a/components/Dashboard.tsx b/components/Dashboard.tsx
index cb96770..ea7d0b8 100644
--- a/components/Dashboard.tsx
+++ b/components/Dashboard.tsx
@@ -34,12 +34,12 @@ const ExpandableCard: React.FC<{ title: string; children: React.ReactNode; class
 
     if (isExpanded) {
         return (
-            <div className="fixed inset-0 z-50 bg-slate-950 px-6 pb-6 pt-32 flex flex-col animate-fade-in overflow-hidden">
+            <div className="fixed inset-0 z-50 bg-slate-950 px-3 pb-16 pt-16 md:px-6 md:pb-6 md:pt-32 flex flex-col animate-fade-in overflow-hidden">
 
-                {/* Fixed Close Button - Positioned TOP RIGHT ON TOP OF FILTER BAR with z-[100] */}
+                {/* Fixed Close Button */}
                 <button
                     onClick={toggleExpand}
-                    className="fixed top-3 right-3 z-[100] p-2 bg-red-600/90 hover:bg-red-500 border border-red-400 rounded-full text-white transition-all shadow-2xl hover:scale-110 flex items-center gap-2 group"
+                    className="fixed top-3 right-3 z-[100] p-2 bg-red-600/90 hover:bg-red-500 active:bg-red-500 border border-red-400 rounded-full text-white transition-all shadow-2xl hover:scale-110 flex items-center gap-2 group"
                     title="Exit Fullscreen"
                 >
                     <span className="text-xs font-bold hidden group-hover:inline pr-1">CLOSE</span>
@@ -48,10 +48,10 @@ const ExpandableCard: React.FC<{ title: string; children: React.ReactNode; class
                     </svg>
                 </button>
 
-                <div className="flex justify-between items-center mb-4 border-b border-slate-800 pb-4 shrink-0">
-                    <h3 className="text-xl font-bold text-slate-100 uppercase tracking-wide">{title}</h3>
+                <div className="flex justify-between items-center mb-3 md:mb-4 border-b border-slate-800 pb-3 md:pb-4 shrink-0">
+                    <h3 className="text-base md:text-xl font-bold text-slate-100 uppercase tracking-wide">{title}</h3>
                 </div>
-                <div className="flex-1 overflow-auto bg-slate-900 rounded-xl p-6 border border-border custom-scrollbar">
+                <div className="flex-1 overflow-auto bg-slate-900 rounded-xl p-3 md:p-6 border border-border custom-scrollbar scroll-touch">
                     {children}
                 </div>
             </div>
@@ -60,13 +60,13 @@ const ExpandableCard: React.FC<{ title: string; children: React.ReactNode; class
 
     return (
         <div
-            className={`bg-surface border border-border rounded-xl p-6 shadow-sm flex flex-col group relative transition-all duration-300 hover:shadow-primary/5 ${className}`}
+            className={`bg-surface border border-border rounded-xl p-3 md:p-6 shadow-sm flex flex-col group relative transition-all duration-300 hover:shadow-primary/5 ${className}`}
         >
-            <div className="flex justify-between items-start mb-4">
-                <h3 className="text-sm font-semibold text-slate-400 uppercase tracking-wide">{title}</h3>
+            <div className="flex justify-between items-start mb-3 md:mb-4">
+                <h3 className="text-xs md:text-sm font-semibold text-slate-400 uppercase tracking-wide">{title}</h3>
                 <button
                     onClick={toggleExpand}
-                    className="opacity-0 group-hover:opacity-100 text-slate-500 hover:text-primary transition-opacity"
+                    className="opacity-100 md:opacity-0 md:group-hover:opacity-100 text-slate-500 hover:text-primary active:text-primary transition-opacity"
                     title="Expand to Fullscreen"
                 >
                     <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" strokeWidth={1.5} stroke="currentColor" className="w-5 h-5">
@@ -74,7 +74,7 @@ const ExpandableCard: React.FC<{ title: string; children: React.ReactNode; class
                     </svg>
                 </button>
             </div>
-            <div className="flex-1 min-h-[250px] cursor-pointer" onClick={toggleExpand}>{children}</div>
+            <div className="flex-1 min-h-[200px] md:min-h-[250px] cursor-pointer" onClick={toggleExpand}>{children}</div>
         </div>
     );
 };
@@ -102,8 +102,8 @@ const MultiYearKPICard: React.FC<{
     const displayTitle = contextData ? `${title} (Selected Item)` : title;
 
     return (
-        <div className="bg-gradient-to-br from-surface to-slate-900 border border-border rounded-xl p-6 flex flex-col justify-center">
-            <h3 className="text-sm font-medium text-slate-400 mb-3">{displayTitle}</h3>
+        <div className="bg-gradient-to-br from-surface to-slate-900 border border-border rounded-xl p-3 md:p-6 flex flex-col justify-center">
+            <h3 className="text-xs md:text-sm font-medium text-slate-400 mb-2 md:mb-3">{displayTitle}</h3>
 
             {sortedYears.length === 0 && <p className="text-3xl font-bold text-white">0</p>}
 
@@ -508,7 +508,7 @@ const Dashboard: React.FC<DashboardProps> = ({ data, contextData, adsData = [] }
     const chartHeight = Math.max(displayData.topLinesSplit.length * 60, 300);
 
     return (
-        <div className="p-6 space-y-6 max-w-7xl mx-auto animate-fade-in pb-24">
+        <div className="p-3 md:p-6 space-y-4 md:space-y-6 max-w-7xl mx-auto animate-fade-in pb-24">
 
             {/* Ads Performance Section - Condensed Layout */}
             {adsKPIsByYear && availableAdsYears.length > 0 && (
diff --git a/components/DataGrid.tsx b/components/DataGrid.tsx
index 865938c..28ad379 100644
--- a/components/DataGrid.tsx
+++ b/components/DataGrid.tsx
@@ -738,7 +738,7 @@ const DataGrid: React.FC<DataGridProps> = ({ data, filters, hasCustomerFilter, a
     }, [rowFilters, data, effectiveDimensions, searchTerm]);
 
     return (
-        <div className="space-y-6 max-w-[95vw] mx-auto animate-fade-in pb-24">
+        <div className="space-y-4 md:space-y-6 max-w-[98vw] md:max-w-[95vw] mx-auto animate-fade-in px-1 md:px-0 pb-24">
 
             {/* 1. Time Series Chart Section */}
             {showChart && chartData.length > 0 && (
@@ -1173,8 +1173,8 @@ const DataGrid: React.FC<DataGridProps> = ({ data, filters, hasCustomerFilter, a
             )}
 
             {/* Data Table */}
-            <div className="overflow-x-auto min-h-[400px]">
-                <table className="w-full text-left text-sm border-collapse">
+            <div className="overflow-x-auto min-h-[400px] scroll-touch">
+                <table className="w-full text-left text-xs md:text-sm border-collapse">
                     <thead className="bg-slate-950 text-slate-400 uppercase text-xs font-semibold tracking-wider sticky top-0 z-20 shadow-sm border-b border-white/10">
                         {/* NEW: Filtered Totals Header Row */}
                         <tr className="bg-indigo-950/20 border-b border-indigo-500/30">
diff --git a/components/FilterBar.tsx b/components/FilterBar.tsx
index e0c0110..c1494b3 100644
--- a/components/FilterBar.tsx
+++ b/components/FilterBar.tsx
@@ -1,7 +1,8 @@
 
-import React from 'react';
+import React, { useState, useMemo } from 'react';
 import { FilterState } from '../types';
 import MultiSelectDropdown from './MultiSelectDropdown';
+import { FunnelIcon } from './Icons';
 
 interface FilterBarProps {
   filters: FilterState;
@@ -20,36 +21,64 @@ interface FilterBarProps {
 }
 
 const FilterBar: React.FC<FilterBarProps> = ({ filters, onFilterChange, options }) => {
+  const [isExpanded, setIsExpanded] = useState(false);
+
+  const activeFilterCount = useMemo(() => {
+    return filters.customer.length + filters.year.length + filters.month.length +
+      filters.week.length + filters.line.length + filters.sku.length +
+      filters.title.length + filters.asin.length + filters.stock.length;
+  }, [filters]);
+
   return (
-    <div className="bg-slate-950 border-b border-border sticky top-0 z-[60] p-4 shadow-xl">
-      <div className="max-w-7xl mx-auto flex flex-wrap gap-4 items-end">
+    <div className="bg-slate-950 border-b border-border sticky top-0 z-[60] p-2 md:p-4 shadow-xl">
+      {/* Mobile toggle button */}
+      <button
+        onClick={() => setIsExpanded(!isExpanded)}
+        className="md:hidden w-full flex items-center justify-between px-3 py-2 bg-surface border border-border rounded-lg text-sm text-slate-300 active:bg-slate-800 transition-colors"
+      >
+        <div className="flex items-center gap-2">
+          <FunnelIcon />
+          <span className="font-medium">Filters</span>
+          {activeFilterCount > 0 && (
+            <span className="bg-primary text-white text-[10px] font-bold px-1.5 py-0.5 rounded-full min-w-[20px] text-center">
+              {activeFilterCount}
+            </span>
+          )}
+        </div>
+        <svg className={`w-4 h-4 transition-transform ${isExpanded ? 'rotate-180' : ''}`} fill="none" viewBox="0 0 24 24" stroke="currentColor">
+          <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 9l-7 7-7-7" />
+        </svg>
+      </button>
+
+      {/* Filter dropdowns - always visible on desktop, toggle on mobile */}
+      <div className={`max-w-7xl mx-auto flex-wrap gap-2 md:gap-4 items-end ${isExpanded ? 'flex flex-col md:flex-row mt-3' : 'hidden md:flex md:flex-row'}`}>
         <MultiSelectDropdown
           label="Customer"
           selected={filters.customer}
           options={options.customer}
           onChange={(v) => onFilterChange('customer', v)}
-          className="flex-1"
+          className="w-full md:w-auto md:flex-1"
         />
         <MultiSelectDropdown
           label="Year"
           selected={filters.year}
           options={options.year}
           onChange={(v) => onFilterChange('year', v)}
-          className="flex-1"
+          className="w-full md:w-auto md:flex-1"
         />
         <MultiSelectDropdown
           label="Month"
           selected={filters.month}
           options={options.month}
           onChange={(v) => onFilterChange('month', v)}
-          className="flex-1"
+          className="w-full md:w-auto md:flex-1"
         />
         <MultiSelectDropdown
           label="Week"
           selected={filters.week}
           options={options.week}
           onChange={(v) => onFilterChange('week', v)}
-          className="flex-1"
+          className="w-full md:w-auto md:flex-1"
           enableRangeSelect={true}
         />
         <MultiSelectDropdown
@@ -57,35 +86,35 @@ const FilterBar: React.FC<FilterBarProps> = ({ filters, onFilterChange, options
           selected={filters.line}
           options={options.line}
           onChange={(v) => onFilterChange('line', v)}
-          className="flex-1"
+          className="w-full md:w-auto md:flex-1"
         />
         <MultiSelectDropdown
           label="SKU"
           selected={filters.sku}
           options={options.sku}
           onChange={(v) => onFilterChange('sku', v)}
-          className="flex-1"
+          className="w-full md:w-auto md:flex-1"
         />
         <MultiSelectDropdown
           label="Title"
           selected={filters.title}
           options={options.title}
           onChange={(v) => onFilterChange('title', v)}
-          className="flex-1"
+          className="w-full md:w-auto md:flex-1"
         />
         <MultiSelectDropdown
           label="ASIN"
           selected={filters.asin}
           options={options.asin}
           onChange={(v) => onFilterChange('asin', v)}
-          className="flex-1"
+          className="w-full md:w-auto md:flex-1"
         />
         <MultiSelectDropdown
           label="Stock"
           selected={filters.stock}
           options={options.stock}
           onChange={(v) => onFilterChange('stock', v)}
-          className="flex-1"
+          className="w-full md:w-auto md:flex-1"
           enableRangeSelect={true}
         />
       </div>
diff --git a/components/ForecastView.tsx b/components/ForecastView.tsx
index ac578ea..3213121 100644
--- a/components/ForecastView.tsx
+++ b/components/ForecastView.tsx
@@ -414,8 +414,8 @@ const ForecastView: React.FC<ForecastViewProps> = ({
     };
 
     return (
-        <div className="flex flex-col gap-6 animate-fade-in p-6 h-full overflow-hidden">
-            <div className="flex flex-col xl:flex-row gap-6 h-[400px] shrink-0">
+        <div className="flex flex-col gap-4 md:gap-6 animate-fade-in p-3 md:p-6 h-full overflow-hidden">
+            <div className="flex flex-col xl:flex-row gap-4 md:gap-6 h-auto xl:h-[400px] shrink-0">
                 <div className="flex flex-col gap-4 min-w-[300px] xl:w-[25%]">
                     <div className="bg-slate-900 border border-white/5 p-4 rounded-xl shadow-lg flex-1 flex flex-col justify-center">
                         <span className="text-[10px] font-black text-slate-400 uppercase tracking-widest mb-1">Annual Forecast Total</span>
@@ -478,8 +478,8 @@ const ForecastView: React.FC<ForecastViewProps> = ({
             </div>
 
             <div className="bg-slate-900 border border-white/10 rounded-2xl overflow-hidden shadow-2xl flex-1 flex flex-col min-h-0 relative">
-                <div className="p-4 border-b border-white/5 flex flex-col md:flex-row justify-between gap-4 bg-slate-800/20 shrink-0">
-                    <h3 className="text-lg font-bold text-white uppercase tracking-tight">
+                <div className="p-2 md:p-4 border-b border-white/5 flex flex-col md:flex-row justify-between gap-2 md:gap-4 bg-slate-800/20 shrink-0">
+                    <h3 className="text-sm md:text-lg font-bold text-white uppercase tracking-tight">
                         Product Performance Comparison <span className="text-xs text-slate-500 font-normal normal-case ml-2">(v2.5 optimized)</span>
                     </h3>
                     <div className="flex items-center gap-4">
@@ -536,8 +536,8 @@ const ForecastView: React.FC<ForecastViewProps> = ({
                     </div>
                 </div>
 
-                <div className="flex-1 overflow-auto min-h-0 custom-scrollbar relative">
-                    <table className="w-full text-left border-collapse relative">
+                <div className="flex-1 overflow-auto min-h-0 custom-scrollbar scroll-touch relative">
+                    <table className="w-full text-left border-collapse relative text-[10px] md:text-sm">
                         <thead className="sticky top-0 z-20 bg-slate-950 shadow-sm text-[10px] font-black text-slate-500 uppercase tracking-wider">
                             <tr>
                                 <th className="px-6 py-4 text-left w-[30%]">
diff --git a/components/MultiSelectDropdown.tsx b/components/MultiSelectDropdown.tsx
index 3d9d1bd..67eed51 100644
--- a/components/MultiSelectDropdown.tsx
+++ b/components/MultiSelectDropdown.tsx
@@ -38,6 +38,14 @@ const MultiSelectDropdown: React.FC<MultiSelectDropdownProps> = ({ label, select
     }
   }, [isOpen]);
 
+  // Prevent body scroll when dropdown is open on mobile
+  useEffect(() => {
+    if (isOpen && window.innerWidth < 768) {
+      document.body.style.overflow = 'hidden';
+      return () => { document.body.style.overflow = ''; };
+    }
+  }, [isOpen]);
+
   const filteredOptions = useMemo(() => {
     if (!searchTerm) return options;
     return options.filter(opt => opt.toLowerCase().includes(searchTerm.toLowerCase()));
@@ -139,8 +147,23 @@ const MultiSelectDropdown: React.FC<MultiSelectDropdownProps> = ({ label, select
         </svg>
       </button>
 
+      {/* Mobile overlay backdrop */}
       {isOpen && (
-        <div className="absolute top-[calc(100%+4px)] left-0 w-64 max-h-96 overflow-hidden bg-slate-900 border border-slate-700 rounded-xl shadow-2xl z-[100] animate-fade-in flex flex-col">
+        <div className="fixed inset-0 bg-black/50 z-[99] md:hidden" onClick={() => setIsOpen(false)} />
+      )}
+
+      {isOpen && (
+        <div className="fixed inset-x-3 bottom-3 max-h-[75vh] md:absolute md:inset-auto md:top-[calc(100%+4px)] md:left-0 md:bottom-auto md:w-64 md:max-h-96 overflow-hidden bg-slate-900 border border-slate-700 rounded-xl shadow-2xl z-[100] animate-fade-in flex flex-col">
+
+          {/* Mobile header with close */}
+          <div className="flex items-center justify-between p-3 border-b border-slate-800 md:hidden">
+            <h3 className="text-sm font-bold text-white">{label}</h3>
+            <button onClick={() => setIsOpen(false)} className="text-slate-400 active:text-white p-1">
+              <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" strokeWidth={2} stroke="currentColor" className="w-5 h-5">
+                <path strokeLinecap="round" strokeLinejoin="round" d="M6 18 18 6M6 6l12 12" />
+              </svg>
+            </button>
+          </div>
 
           {/* Search Bar */}
           <div className="p-2 border-b border-slate-800 sticky top-0 bg-slate-900 z-10">
@@ -209,14 +232,14 @@ const MultiSelectDropdown: React.FC<MultiSelectDropdownProps> = ({ label, select
             </button>
           </div>
 
-          <div className="space-y-1 overflow-y-auto custom-scrollbar p-2 max-h-60">
+          <div className="space-y-1 overflow-y-auto custom-scrollbar scroll-touch p-2 max-h-60 md:max-h-60">
             {filteredOptions.map((opt) => (
-              <label key={opt} className="flex items-center space-x-3 p-2 rounded hover:bg-slate-800 cursor-pointer group">
+              <label key={opt} className="flex items-center space-x-3 p-2.5 md:p-2 rounded hover:bg-slate-800 active:bg-slate-700 cursor-pointer group">
                 <input
                   type="checkbox"
                   checked={selected.includes(opt)}
                   onChange={() => toggleOption(opt)}
-                  className="form-checkbox h-4 w-4 text-primary rounded border-slate-600 bg-slate-800 focus:ring-primary focus:ring-offset-slate-900 transition duration-150 ease-in-out"
+                  className="form-checkbox h-5 w-5 md:h-4 md:w-4 text-primary rounded border-slate-600 bg-slate-800 focus:ring-primary focus:ring-offset-slate-900 transition duration-150 ease-in-out"
                 />
                 <span className={`text-sm break-all group-hover:text-white ${selected.includes(opt) ? 'text-white' : 'text-slate-400'}`}>
                   {opt}
diff --git a/components/TopMovers.tsx b/components/TopMovers.tsx
index a429cbe..8d5d852 100644
--- a/components/TopMovers.tsx
+++ b/components/TopMovers.tsx
@@ -241,7 +241,7 @@ const TopMovers: React.FC<TopMoversProps> = ({ data }) => {
   }
 
   return (
-    <div className="space-y-6 max-w-7xl mx-auto pb-24 animate-fade-in">
+    <div className="space-y-4 md:space-y-6 max-w-7xl mx-auto px-1 md:px-0 pb-24 animate-fade-in">
 
       {/* Controls Header */}
       <div className="bg-surface border border-border rounded-xl p-6 shadow-sm flex flex-col md:flex-row justify-between items-center gap-4">
diff --git a/components/WeeklyGrid.tsx b/components/WeeklyGrid.tsx
index 1c99b36..5cd4c2c 100644
--- a/components/WeeklyGrid.tsx
+++ b/components/WeeklyGrid.tsx
@@ -632,9 +632,9 @@ const WeeklyGrid: React.FC<WeeklyGridProps & { top50Mode: 'eu' | 'uk' }> = ({
     }, [sortedRows, allWeeks, weekTotals]);
 
     return (
-        <div className="flex flex-col gap-4 animate-fade-in">
+        <div className="flex flex-col gap-3 md:gap-4 animate-fade-in px-1 md:px-0">
             {/* Toolbar: Search & Pagination */}
-            <div className="flex flex-col lg:flex-row justify-between items-center gap-4 bg-slate-900 border border-white/10 p-4 rounded-xl shadow-lg">
+            <div className="flex flex-col lg:flex-row justify-between items-center gap-3 md:gap-4 bg-slate-900 border border-white/10 p-2 md:p-4 rounded-xl shadow-lg">
                 <div className="flex flex-wrap items-center gap-4 w-full lg:w-auto">
                     {/* Search Input */}
                     <div className="relative w-full md:w-80">
@@ -739,8 +739,8 @@ const WeeklyGrid: React.FC<WeeklyGridProps & { top50Mode: 'eu' | 'uk' }> = ({
             </div>
 
             <div className="bg-slate-900 border border-white/10 rounded-xl overflow-hidden shadow-2xl flex-1 min-h-0">
-                <div className="overflow-x-auto overflow-y-auto h-full max-h-[calc(100vh-220px)] custom-scrollbar">
-                    <table className="w-full text-left border-collapse min-w-[max-content]">
+                <div className="overflow-x-auto overflow-y-auto h-full max-h-[calc(100vh-220px)] custom-scrollbar scroll-touch">
+                    <table className="w-full text-left border-collapse min-w-[max-content] text-[10px] md:text-sm">
                         <thead className="sticky top-0 z-20 bg-slate-900">
                             <tr className="bg-slate-900 border-b border-white/10 relative z-30">
                                 <th
diff --git a/index.html b/index.html
index f354a28..141bbf4 100644
--- a/index.html
+++ b/index.html
@@ -44,6 +44,14 @@
       background: #475569;
     }
 
+    /* Thinner scrollbar on mobile */
+    @media (max-width: 767px) {
+      ::-webkit-scrollbar {
+        width: 4px;
+        height: 4px;
+      }
+    }
+
     @keyframes bounce-subtle {
 
       0%,
@@ -59,6 +67,23 @@
     .animate-bounce-subtle {
       animation: bounce-subtle 2s ease-in-out infinite;
     }
+
+    /* Bottom nav safe area for iPhones with notch */
+    .pb-safe {
+      padding-bottom: env(safe-area-inset-bottom, 0px);
+    }
+
+    /* Smooth momentum scrolling on iOS */
+    .scroll-touch {
+      -webkit-overflow-scrolling: touch;
+    }
+
+    /* Bottom nav spacing - adds padding so content isn't hidden behind fixed bottom nav */
+    @media (max-width: 767px) {
+      body {
+        padding-bottom: calc(4rem + env(safe-area-inset-bottom, 0px));
+      }
+    }
   </style>
 
 </head>