diff --git a/app/[workspace]/project/[projectId]/overview/page.tsx b/app/[workspace]/project/[projectId]/overview/page.tsx
index 27dfb59..b90d1a3 100644
--- a/app/[workspace]/project/[projectId]/overview/page.tsx
+++ b/app/[workspace]/project/[projectId]/overview/page.tsx
@@ -7,6 +7,57 @@ import { AtlasChat } from "@/components/AtlasChat";
 import { OrchestratorChat } from "@/components/OrchestratorChat";
 import { Loader2 } from "lucide-react";
 
+function MobileQRButton({ projectId, workspace }: { projectId: string; workspace: string }) {
+  const [show, setShow] = useState(false);
+  const url = typeof window !== "undefined"
+    ? `${window.location.origin}/${workspace}/project/${projectId}/overview`
+    : "";
+  const qrSrc = `https://api.qrserver.com/v1/create-qr-code/?size=180x180&data=${encodeURIComponent(url)}&bgcolor=f6f4f0&color=1a1a1a&margin=2`;
+
+  return (
+    <div style={{ position: "relative" }}>
+      <button
+        onClick={() => setShow(s => !s)}
+        title="Open on your phone"
+        style={{
+          display: "flex", alignItems: "center", gap: 6,
+          padding: "6px 12px", borderRadius: 7,
+          background: "none", border: "1px solid #e0dcd4",
+          fontSize: "0.72rem", fontFamily: "Outfit, sans-serif",
+          color: "#8a8478", cursor: "pointer",
+          transition: "border-color 0.12s",
+        }}
+        onMouseEnter={e => (e.currentTarget.style.borderColor = "#b5b0a6")}
+        onMouseLeave={e => (e.currentTarget.style.borderColor = "#e0dcd4")}
+      >
+        📱 Open on phone
+      </button>
+      {show && (
+        <div style={{
+          position: "absolute", top: "calc(100% + 8px)", right: 0,
+          background: "#fff", borderRadius: 12,
+          border: "1px solid #e8e4dc",
+          boxShadow: "0 8px 24px #1a1a1a12",
+          padding: "16px", zIndex: 50,
+          display: "flex", flexDirection: "column", alignItems: "center", gap: 10,
+          minWidth: 220,
+        }}>
+          <img src={qrSrc} alt="QR code" width={180} height={180} style={{ borderRadius: 8 }} />
+          <p style={{ fontSize: "0.72rem", color: "#8a8478", textAlign: "center", margin: 0, fontFamily: "Outfit, sans-serif" }}>
+            Scan to open Atlas on your phone
+          </p>
+          <p style={{ fontSize: "0.65rem", color: "#b5b0a6", textAlign: "center", margin: 0, fontFamily: "IBM Plex Mono, monospace", wordBreak: "break-all" }}>
+            {url}
+          </p>
+          <button onClick={() => setShow(false)} style={{ fontSize: "0.68rem", color: "#a09a90", background: "none", border: "none", cursor: "pointer" }}>
+            Close
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}
+
 interface Project {
   id: string;
   productName: string;
@@ -16,6 +67,7 @@ interface Project {
 export default function ProjectOverviewPage() {
   const params = useParams();
   const projectId = params.projectId as string;
+  const workspace = params.workspace as string;
   const { status: authStatus } = useSession();
   const [project, setProject] = useState<Project | null>(null);
   const [loading, setLoading] = useState(true);
@@ -50,6 +102,15 @@ export default function ProjectOverviewPage() {
 
   return (
     <div style={{ height: "100%", display: "flex", flexDirection: "column" }}>
+      {/* Desktop-only: Open on phone button */}
+      <style>{`@media (max-width: 768px) { .vibn-phone-btn { display: none !important; } }`}</style>
+      <div className="vibn-phone-btn" style={{
+        position: "absolute", top: 14, right: 248,
+        zIndex: 20,
+      }}>
+        <MobileQRButton projectId={projectId} workspace={workspace} />
+      </div>
+
       {(!project.stage || project.stage === "discovery") ? (
         <AtlasChat
           projectId={projectId}
diff --git a/app/layout.tsx b/app/layout.tsx
index 45c647b..3393501 100644
--- a/app/layout.tsx
+++ b/app/layout.tsx
@@ -24,8 +24,18 @@ const ibmPlexMono = IBM_Plex_Mono({
 });
 
 export const metadata: Metadata = {
-  title: "VIBN - AI-Powered Development Platform",
-  description: "Track, manage, and deploy your AI-coded projects with ease",
+  title: "VIBN — Build with Atlas",
+  description: "Chat with Atlas to define your product, then let AI build it.",
+  manifest: "/manifest.json",
+  appleWebApp: {
+    capable: true,
+    statusBarStyle: "black-translucent",
+    title: "VIBN",
+  },
+  other: {
+    "mobile-web-app-capable": "yes",
+    "msapplication-TileColor": "#1a1a1a",
+  },
 };
 
 export default function RootLayout({
@@ -35,6 +45,12 @@ export default function RootLayout({
 }>) {
   return (
     <html lang="en" suppressHydrationWarning>
+      <head>
+        <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
+        <meta name="theme-color" content="#1a1a1a" />
+        <link rel="apple-touch-icon" href="/vibn-logo-circle.png" />
+        <link rel="manifest" href="/manifest.json" />
+      </head>
       <body
         className={`${outfit.variable} ${newsreader.variable} ${ibmPlexMono.variable} antialiased`}
       >
@@ -42,6 +58,13 @@ export default function RootLayout({
           {children}
           <Toaster />
         </Providers>
+        <script dangerouslySetInnerHTML={{ __html: `
+          if ('serviceWorker' in navigator) {
+            window.addEventListener('load', () => {
+              navigator.serviceWorker.register('/sw.js').catch(() => {});
+            });
+          }
+        `}} />
       </body>
     </html>
   );
diff --git a/components/AtlasChat.tsx b/components/AtlasChat.tsx
index a3bec6c..7a374d3 100644
--- a/components/AtlasChat.tsx
+++ b/components/AtlasChat.tsx
@@ -351,7 +351,7 @@ export function AtlasChat({ projectId }: AtlasChatProps) {
       )}
 
       {/* Input bar */}
-      <div style={{ padding: "14px 32px 22px", flexShrink: 0 }}>
+      <div style={{ padding: "14px 32px max(22px, env(safe-area-inset-bottom))", flexShrink: 0 }}>
         <div style={{
           display: "flex", gap: 8, padding: "5px 5px 5px 16px",
           background: "#fff", border: "1px solid #e0dcd4", borderRadius: 10,
diff --git a/components/layout/project-shell.tsx b/components/layout/project-shell.tsx
index 5e5321f..2db980a 100644
--- a/components/layout/project-shell.tsx
+++ b/components/layout/project-shell.tsx
@@ -129,15 +129,30 @@ export function ProjectShell({
 
   return (
     <>
-      <div style={{ display: "flex", height: "100vh", background: "#f6f4f0", overflow: "hidden" }}>
+      <style>{`
+        @media (max-width: 768px) {
+          .vibn-left-sidebar  { display: none !important; }
+          .vibn-right-panel   { display: none !important; }
+          .vibn-tab-bar       { overflow-x: auto; -webkit-overflow-scrolling: touch; }
+          .vibn-tab-bar a     { padding: 10px 14px !important; font-size: 0.75rem !important; }
+          .vibn-project-header { padding: 12px 16px !important; }
+          .vibn-page-content  { padding-bottom: env(safe-area-inset-bottom); }
+        }
+        @media (max-width: 480px) {
+          .vibn-tab-bar a     { padding: 10px 10px !important; }
+        }
+      `}</style>
+      <div style={{ display: "flex", height: "100dvh", background: "#f6f4f0", overflow: "hidden" }}>
         {/* Left sidebar */}
-        <VIBNSidebar workspace={workspace} />
+        <div className="vibn-left-sidebar" style={{ display: "flex" }}>
+          <VIBNSidebar workspace={workspace} />
+        </div>
 
         {/* Main column */}
         <div style={{ flex: 1, display: "flex", flexDirection: "column", minWidth: 0 }}>
 
           {/* Project header */}
-          <div style={{
+          <div className="vibn-project-header" style={{
             padding: "18px 32px",
             borderBottom: "1px solid #e8e4dc",
             display: "flex",
@@ -189,7 +204,7 @@ export function ProjectShell({
           </div>
 
           {/* Tab bar */}
-          <div style={{
+          <div className="vibn-tab-bar" style={{
             padding: "0 32px",
             borderBottom: "1px solid #e8e4dc",
             display: "flex",
@@ -219,13 +234,13 @@ export function ProjectShell({
           </div>
 
           {/* Page content */}
-          <div style={{ flex: 1, overflow: "auto" }}>
+          <div className="vibn-page-content" style={{ flex: 1, overflow: "auto" }}>
             {children}
           </div>
         </div>
 
         {/* Right panel */}
-        <div style={{
+        <div className="vibn-right-panel" style={{
           width: 230,
           borderLeft: "1px solid #e8e4dc",
           background: "#fff",
diff --git a/public/manifest.json b/public/manifest.json
new file mode 100644
index 0000000..657ca6a
--- /dev/null
+++ b/public/manifest.json
@@ -0,0 +1,26 @@
+{
+  "name": "VIBN — Build with Atlas",
+  "short_name": "VIBN",
+  "description": "Chat with Atlas to define your product requirements — anywhere, anytime.",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#f6f4f0",
+  "theme_color": "#1a1a1a",
+  "orientation": "portrait-primary",
+  "icons": [
+    {
+      "src": "/vibn-logo-circle.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "/vibn-logo-circle.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
+    }
+  ],
+  "categories": ["productivity", "business"],
+  "lang": "en"
+}
diff --git a/public/sw.js b/public/sw.js
new file mode 100644
index 0000000..767ee4e
--- /dev/null
+++ b/public/sw.js
@@ -0,0 +1,47 @@
+// VIBN Service Worker — enables PWA install + basic offline shell
+const CACHE = 'vibn-v1';
+
+// Cache the app shell on install
+self.addEventListener('install', (e) => {
+  e.waitUntil(
+    caches.open(CACHE).then(cache =>
+      cache.addAll(['/', '/manifest.json'])
+    )
+  );
+  self.skipWaiting();
+});
+
+self.addEventListener('activate', () => self.clients.claim());
+
+// Network-first for API calls, cache-first for static assets
+self.addEventListener('fetch', (e) => {
+  const { request } = e;
+  const url = new URL(request.url);
+
+  // Never cache API calls
+  if (url.pathname.startsWith('/api/')) return;
+
+  // Cache-first for static assets
+  if (
+    request.destination === 'image' ||
+    request.destination === 'font' ||
+    url.pathname.startsWith('/_next/static/')
+  ) {
+    e.respondWith(
+      caches.match(request).then(cached => {
+        if (cached) return cached;
+        return fetch(request).then(res => {
+          const clone = res.clone();
+          caches.open(CACHE).then(c => c.put(request, clone));
+          return res;
+        });
+      })
+    );
+    return;
+  }
+
+  // Network-first for everything else (HTML pages)
+  e.respondWith(
+    fetch(request).catch(() => caches.match(request))
+  );
+});