fix: mobile responsive layout

- Sidebar hidden on mobile, slides in from left as overlay (hamburger)
- Mobile top bar with hamburger, brand, and mini play/pause button
- Mobile bottom navigation bar (icon + label tabs for all 4 views)
- Mobile mini audio strip appears above bottom nav when track is active
- Desktop layout unchanged
- Added aria-labels to all icon-only buttons

src/App.jsx

@@ -15,7 +15,9 @@ import {
   TrendingUp,
   FileText,
   ChevronRight,
-  FolderOpen
+  FolderOpen,
+  Menu,
+  X,
 } from 'lucide-react';
 
 /* ==========================================================================
@@ -344,6 +346,7 @@ export default function App() {
   const [activeView, setActiveView] = useState('missionControl');
   const [activeAudio, setActiveAudio] = useState(null);
   const [isPlaying, setIsPlaying] = useState(false);
+  const [sidebarOpen, setSidebarOpen] = useState(false);
 
   const togglePlay = () => setIsPlaying(!isPlaying);
 
@@ -354,14 +357,66 @@ export default function App() {
     { id: 'wiki', label: 'Loop Wiki', icon: BookOpen },
   ];
 
+  const handleNavClick = (id) => {
+    setActiveView(id);
+    setSidebarOpen(false);
+  };
+
+  const AudioPlayer = () => (
+    activeAudio ? (
+      <div className="animate-fade-in-up">
+        <div className="flex justify-between items-center mb-2">
+          <span className="text-[10px] font-bold text-emerald-400 uppercase tracking-wider">Now Playing</span>
+          <span className="text-xs text-slate-500 font-mono">{isPlaying ? '02:14' : '00:00'} / {activeAudio.duration}</span>
+        </div>
+        <p className="font-semibold text-sm text-white truncate mb-1" title={activeAudio.title}>
+          {activeAudio.title}
+        </p>
+        <p className="text-xs text-slate-400 mb-3 truncate">{activeAudio.author}</p>
+        <div className="flex items-center justify-between mt-3 px-2">
+          <button aria-label="Previous track" className="text-slate-400 hover:text-white transition-colors"><SkipBack size={18} /></button>
+          <button
+            onClick={togglePlay}
+            aria-label={isPlaying ? 'Pause' : 'Play'}
+            className="text-white bg-emerald-500 hover:bg-emerald-400 rounded-full w-10 h-10 flex items-center justify-center transition-all shadow-lg shadow-emerald-500/20"
+          >
+            {isPlaying ? <PauseCircle size={24} className="text-slate-950" /> : <PlayCircle size={24} className="text-slate-950" />}
+          </button>
+          <button aria-label="Next track" className="text-slate-400 hover:text-white transition-colors"><SkipForward size={18} /></button>
+        </div>
+        <div className="w-full bg-slate-800 h-1 mt-4 rounded-full overflow-hidden">
+          <div className="bg-emerald-500 h-full w-1/4 rounded-full transition-all duration-1000 ease-linear"></div>
+        </div>
+      </div>
+    ) : (
+      <div className="py-4 text-center">
+        <Headphones className="mx-auto text-slate-700 mb-2" size={24} />
+        <p className="text-xs text-slate-500 font-medium">Select an audio brief to begin</p>
+      </div>
+    )
+  );
+
   return (
     <div className="flex h-screen bg-slate-950 text-slate-100 font-sans overflow-hidden selection:bg-blue-500/30">
 
-      {/* Sidebar Layout */}
-      <div className="w-72 border-r border-slate-800 flex flex-col bg-slate-900 shadow-2xl relative z-20">
+      {/* Mobile overlay backdrop */}
+      {sidebarOpen && (
+        <div
+          className="fixed inset-0 z-30 bg-black/60 md:hidden"
+          onClick={() => setSidebarOpen(false)}
+        />
+      )}
 
+      {/* Sidebar — slide-over on mobile, fixed column on desktop */}
+      <div className={`
+        fixed inset-y-0 left-0 z-40 w-72 border-r border-slate-800 flex flex-col bg-slate-900 shadow-2xl
+        transform transition-transform duration-300 ease-in-out
+        md:relative md:translate-x-0
+        ${sidebarOpen ? 'translate-x-0' : '-translate-x-full md:translate-x-0'}
+      `}>
         {/* Brand */}
-        <div className="p-6">
+        <div className="p-6 flex items-start justify-between">
+          <div>
             <div className="flex items-center gap-3 mb-1">
               <div className="w-8 h-8 bg-white rounded-lg flex items-center justify-center">
                 <TrendingUp className="text-slate-950" size={20} strokeWidth={2.5} />
@@ -370,9 +425,17 @@ export default function App() {
             </div>
             <p className="text-[10px] uppercase font-bold tracking-[0.2em] text-slate-500 ml-11">Coach Portal</p>
           </div>
+          <button
+            onClick={() => setSidebarOpen(false)}
+            className="md:hidden text-slate-500 hover:text-white p-1 mt-1"
+            aria-label="Close menu"
+          >
+            <X size={20} />
+          </button>
+        </div>
 
         {/* Navigation */}
-        <nav className="flex-1 px-4 mt-6 space-y-2 overflow-y-auto">
+        <nav className="flex-1 px-4 mt-2 space-y-2 overflow-y-auto">
           <div className="text-xs font-semibold text-slate-600 uppercase tracking-wider mb-4 ml-3">Platform</div>
           {navItems.map((item) => {
             const Icon = item.icon;
@@ -380,7 +443,7 @@ export default function App() {
             return (
               <button
                 key={item.id}
-                onClick={() => setActiveView(item.id)}
+                onClick={() => handleNavClick(item.id)}
                 className={`w-full flex items-center justify-between px-3 py-2.5 rounded-lg transition-all duration-200 group ${
                   isActive
                     ? 'bg-blue-600 shadow-md shadow-blue-500/20'
@@ -393,52 +456,51 @@ export default function App() {
                 </div>
                 {isActive && <ChevronRight size={16} className="text-blue-200" />}
               </button>
-            )
+            );
           })}
         </nav>
 
         {/* Global Audio Player */}
         <div className="mt-auto border-t border-slate-800 p-4 bg-slate-950/50 backdrop-blur-md">
-          {activeAudio ? (
-            <div className="animate-fade-in-up">
-              <div className="flex justify-between items-center mb-2">
-                <span className="text-[10px] font-bold text-emerald-400 uppercase tracking-wider">Now Playing</span>
-                <span className="text-xs text-slate-500 font-mono">{isPlaying ? '02:14' : '00:00'} / {activeAudio.duration}</span>
+          <AudioPlayer />
+        </div>
       </div>
-              <p className="font-semibold text-sm text-white truncate mb-1" title={activeAudio.title}>
-                {activeAudio.title}
-              </p>
-              <p className="text-xs text-slate-400 mb-3 truncate">{activeAudio.author}</p>
 
-              <div className="flex items-center justify-between mt-3 px-2">
-                <button className="text-slate-400 hover:text-white transition-colors"><SkipBack size={18} /></button>
+      {/* Main content column */}
+      <div className="flex-1 flex flex-col min-w-0 overflow-hidden">
+
+        {/* Mobile top bar */}
+        <header className="md:hidden flex items-center justify-between px-4 py-3 bg-slate-900 border-b border-slate-800 shrink-0 z-20">
+          <button
+            onClick={() => setSidebarOpen(true)}
+            aria-label="Open menu"
+            className="text-slate-400 hover:text-white p-1"
+          >
+            <Menu size={22} />
+          </button>
+          <div className="flex items-center gap-2">
+            <div className="w-6 h-6 bg-white rounded-md flex items-center justify-center">
+              <TrendingUp className="text-slate-950" size={13} strokeWidth={2.5} />
+            </div>
+            <span className="font-bold text-sm tracking-wide text-white uppercase">FALAH</span>
+            <span className="text-[9px] uppercase font-bold tracking-widest text-slate-500">Coach Portal</span>
+          </div>
+          {activeAudio ? (
             <button
               onClick={togglePlay}
-                  className="text-white bg-emerald-500 hover:bg-emerald-400 rounded-full w-10 h-10 flex items-center justify-center transition-all shadow-lg shadow-emerald-500/20"
+              aria-label={isPlaying ? 'Pause' : 'Play'}
+              className="w-8 h-8 bg-emerald-500 hover:bg-emerald-400 rounded-full flex items-center justify-center transition-all"
             >
-                  {isPlaying ? <PauseCircle size={24} className="text-slate-950" /> : <PlayCircle size={24} className="text-slate-950" />}
+              {isPlaying ? <PauseCircle size={18} className="text-slate-950" /> : <PlayCircle size={18} className="text-slate-950" />}
             </button>
-                <button className="text-slate-400 hover:text-white transition-colors"><SkipForward size={18} /></button>
-              </div>
-              {/* Fake progress bar */}
-              <div className="w-full bg-slate-800 h-1 mt-4 rounded-full overflow-hidden">
-                <div className="bg-emerald-500 h-full w-1/4 rounded-full transition-all duration-1000 ease-linear"></div>
-              </div>
-            </div>
           ) : (
-            <div className="py-4 text-center">
-              <Headphones className="mx-auto text-slate-700 mb-2" size={24} />
-              <p className="text-xs text-slate-500 font-medium">Select an audio brief to begin</p>
-            </div>
+            <div className="w-8" />
           )}
-        </div>
-      </div>
-
-      {/* Main Content Area */}
-      <main className="flex-1 overflow-y-auto p-8 relative scroll-smooth overflow-x-hidden">
-        {/* Ambient background glow */}
-        <div className="absolute top-[-20%] left-[-10%] w-[50%] h-[50%] bg-blue-600/5 rounded-full blur-[120px] pointer-events-none"></div>
+        </header>
 
+        {/* Scrollable main content */}
+        <main className="flex-1 overflow-y-auto p-4 md:p-8 relative scroll-smooth overflow-x-hidden">
+          <div className="absolute top-[-20%] left-[-10%] w-[50%] h-[50%] bg-blue-600/5 rounded-full blur-[120px] pointer-events-none" />
           <div className="max-w-6xl mx-auto h-full relative z-10">
             {activeView === 'missionControl' && <MissionControlView setActiveView={setActiveView} setActiveAudio={setActiveAudio} />}
             {activeView === 'simulator' && <AICoPilotView />}
@@ -447,6 +509,48 @@ export default function App() {
           </div>
         </main>
 
+        {/* Mobile mini audio strip */}
+        {activeAudio && (
+          <div className="md:hidden shrink-0 bg-slate-900 border-t border-emerald-500/30 px-4 py-2 flex items-center gap-3 z-20 animate-fade-in-up">
+            <div className="flex-1 min-w-0">
+              <p className="text-xs font-semibold text-white truncate">{activeAudio.title}</p>
+              <p className="text-[10px] text-emerald-400 font-bold uppercase tracking-wider">Now Playing</p>
+            </div>
+            <div className="flex items-center gap-2 shrink-0">
+              <button aria-label="Previous" className="text-slate-400"><SkipBack size={16} /></button>
+              <button
+                onClick={togglePlay}
+                aria-label={isPlaying ? 'Pause' : 'Play'}
+                className="w-8 h-8 bg-emerald-500 rounded-full flex items-center justify-center"
+              >
+                {isPlaying ? <PauseCircle size={18} className="text-slate-950" /> : <PlayCircle size={18} className="text-slate-950" />}
+              </button>
+              <button aria-label="Next" className="text-slate-400"><SkipForward size={16} /></button>
+            </div>
+          </div>
+        )}
+
+        {/* Mobile bottom nav bar */}
+        <nav className="md:hidden shrink-0 bg-slate-900 border-t border-slate-800 flex items-center justify-around px-2 py-2 z-20">
+          {navItems.map((item) => {
+            const Icon = item.icon;
+            const isActive = activeView === item.id;
+            return (
+              <button
+                key={item.id}
+                onClick={() => handleNavClick(item.id)}
+                aria-label={item.label}
+                className={`flex flex-col items-center gap-1 px-3 py-1.5 rounded-lg transition-colors ${
+                  isActive ? 'text-blue-400' : 'text-slate-500 hover:text-slate-300'
+                }`}
+              >
+                <Icon size={20} />
+                <span className="text-[10px] font-medium leading-none">{item.label.split(' ')[0]}</span>
+              </button>
+            );
+          })}
+        </nav>
+      </div>
     </div>
   );
 }