diff --git a/apps/web/src/assets/goforlift-ship.png b/apps/web/src/assets/goforlift-ship.png
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diff --git a/apps/web/src/assets/goforlift-wordmark.png b/apps/web/src/assets/goforlift-wordmark.png
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diff --git a/apps/web/src/assets/train-with-purpose.png b/apps/web/src/assets/train-with-purpose.png
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diff --git a/apps/web/src/assets/welcome-starfield-desktop.webp b/apps/web/src/assets/welcome-starfield-desktop.webp
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diff --git a/apps/web/src/assets/welcome-starfield.webp b/apps/web/src/assets/welcome-starfield.webp
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diff --git a/apps/web/src/features/auth/welcome-page.tsx b/apps/web/src/features/auth/welcome-page.tsx
new file mode 100644
index 0000000..aec0871
--- /dev/null
+++ b/apps/web/src/features/auth/welcome-page.tsx
@@ -0,0 +1,89 @@
+// Presents the responsive welcome page and entry points for Google sign-in and guest access.
+import { UserRound } from 'lucide-react';
+
+import shipUrl from '../../assets/goforlift-ship.png';
+import headingUrl from '../../assets/train-with-purpose.png';
+import desktopStarfieldUrl from '../../assets/welcome-starfield-desktop.webp';
+import starfieldUrl from '../../assets/welcome-starfield.webp';
+import wordmarkUrl from '../../assets/goforlift-wordmark.png';
+import { Button } from '../../components/ui/button';
+
+export function WelcomePage() {
+  return (
+    <main className="welcome-starfield flex min-h-screen items-center justify-center overflow-hidden px-6 py-8 text-foreground sm:px-8">
+      <picture aria-hidden="true" className="absolute inset-0">
+        <source media="(min-width: 640px)" srcSet={desktopStarfieldUrl} />
+        <img alt="" className="size-full object-cover" src={starfieldUrl} />
+      </picture>
+      <section className="welcome-panel relative z-10 flex w-full max-w-[390px] flex-col items-center px-1 py-5 text-center sm:max-w-[520px] sm:scale-[0.82] sm:px-16 sm:py-14">
+        <img
+          alt=""
+          aria-hidden="true"
+          className="w-[135px] max-w-full sm:w-[149px]"
+          src={shipUrl}
+        />
+        <img
+          alt="GoForLift"
+          className="-mt-4 w-[230px] max-w-full sm:-mt-5 sm:w-[250px]"
+          src={wordmarkUrl}
+        />
+        <h1 className="-mt-4">
+          <img
+            alt="Train with purpose."
+            className="w-[270px] max-w-full sm:w-[290px]"
+            src={headingUrl}
+          />
+        </h1>
+        <p className="-mt-7 max-w-[310px] text-[16px] leading-7 text-muted-foreground sm:text-[15px] sm:leading-6">
+          Create routines, complete guided
+          <br className="hidden sm:block" /> workouts, and track your progress.
+        </p>
+        <div className="mt-10 grid w-full gap-3 sm:mt-9">
+          <Button
+            asChild
+            className="h-14 rounded-md bg-white text-[16px] font-medium text-neutral-950 shadow-sm hover:bg-neutral-200"
+          >
+            <a href="/auth/google">
+              <GoogleMark />
+              Continue with Google
+            </a>
+          </Button>
+          <Button
+            className="h-14 rounded-md border-white/45 bg-white/[0.025] text-[16px] font-medium hover:bg-white/10"
+            type="button"
+            variant="outline"
+          >
+            <UserRound aria-hidden="true" className="size-5" />
+            Continue as guest
+          </Button>
+        </div>
+        <p className="mt-7 max-w-[260px] text-sm leading-5 text-muted-foreground">
+          Guest progress is temporary and will not be saved.
+        </p>
+      </section>
+    </main>
+  );
+}
+
+function GoogleMark() {
+  return (
+    <svg aria-hidden="true" className="size-5" viewBox="0 0 24 24">
+      <path
+        fill="#4285F4"
+        d="M21.6 12.2c0-.7-.1-1.4-.2-2H12v3.9h5.4a4.6 4.6 0 0 1-2 3v2.5h3.3c1.9-1.8 2.9-4.4 2.9-7.4Z"
+      />
+      <path
+        fill="#34A853"
+        d="M12 22c2.7 0 5-.9 6.7-2.4l-3.3-2.5c-.9.6-2.1 1-3.4 1a5.9 5.9 0 0 1-5.5-4.1H3.1v2.6A10 10 0 0 0 12 22Z"
+      />
+      <path
+        fill="#FBBC05"
+        d="M6.5 14a6 6 0 0 1 0-3.8V7.5H3.1a10 10 0 0 0 0 9.1L6.5 14Z"
+      />
+      <path
+        fill="#EA4335"
+        d="M12 6.1c1.5 0 2.8.5 3.9 1.5l2.9-2.9A9.7 9.7 0 0 0 12 2a10 10 0 0 0-8.9 5.5l3.4 2.7A5.9 5.9 0 0 1 12 6.1Z"
+      />
+    </svg>
+  );
+}
diff --git a/apps/web/src/routes/index.test.tsx b/apps/web/src/routes/index.test.tsx
index 56f0b22..d665d04 100644
--- a/apps/web/src/routes/index.test.tsx
+++ b/apps/web/src/routes/index.test.tsx
@@ -1,24 +1,14 @@
+// Verifies the welcome page's primary entry points and guest-storage notice.
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import { RouterProvider } from '@tanstack/react-router';
 import { render, screen } from '@testing-library/react';
-import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { describe, expect, it } from 'vitest';
 
 import { router } from '../router';
 
-describe('foundation page', () => {
-  beforeEach(() => {
-    vi.stubGlobal(
-      'fetch',
-      vi.fn().mockResolvedValue({
-        json: () => Promise.resolve({ status: 'ok', database: 'connected' }),
-      }),
-    );
-  });
-
-  it('renders the routed application and API status', async () => {
-    const queryClient = new QueryClient({
-      defaultOptions: { queries: { retry: false } },
-    });
+describe('welcome page', () => {
+  it('renders the Google and guest entry points', async () => {
+    const queryClient = new QueryClient();
     await router.navigate({ to: '/' });
 
     render(
@@ -28,10 +18,14 @@ describe('foundation page', () => {
     );
 
     expect(
-      await screen.findByRole('heading', { name: /ready for liftoff/i }),
+      screen.getByRole('heading', { name: /train with purpose/i }),
     ).toBeVisible();
     expect(
-      await screen.findByText(/api and postgresql connected/i),
-    ).toBeVisible();
+      screen.getByRole('link', { name: /continue with google/i }),
+    ).toHaveAttribute('href', '/auth/google');
+    expect(
+      screen.getByRole('button', { name: /continue as guest/i }),
+    ).toBeEnabled();
+    expect(screen.getByText(/guest progress is temporary/i)).toBeVisible();
   });
 });
diff --git a/apps/web/src/routes/index.tsx b/apps/web/src/routes/index.tsx
index c93a5e7..56ddf2b 100644
--- a/apps/web/src/routes/index.tsx
+++ b/apps/web/src/routes/index.tsx
@@ -1,104 +1,6 @@
-import { healthResponseSchema } from '@goforlift/contracts';
-import { useQuery } from '@tanstack/react-query';
+// Maps the root route to the public welcome page.
 import { createFileRoute } from '@tanstack/react-router';
-import { Activity, Orbit } from 'lucide-react';
 
-import { Button } from '../components/ui/button';
+import { WelcomePage } from '../features/auth/welcome-page';
 
-export const Route = createFileRoute('/')({ component: HomePage });
-
-async function getHealth() {
-  const response = await fetch('/health');
-  const data: unknown = await response.json();
-  return healthResponseSchema.parse(data);
-}
-
-function HomePage() {
-  const health = useQuery({
-    queryKey: ['health'],
-    queryFn: getHealth,
-    retry: false,
-  });
-
-  const isConnected = health.data?.database === 'connected';
-  const systemStatus = getSystemStatus(health.isPending, isConnected);
-
-  return (
-    <main className="min-h-screen bg-background px-6 py-10 text-foreground sm:px-10 lg:px-16">
-      <div className="mx-auto grid min-h-[calc(100vh-5rem)] max-w-6xl content-center gap-10 lg:grid-cols-[1.35fr_0.65fr] lg:items-center">
-        <section>
-          <div className="mb-8 flex items-center gap-3 text-sm font-semibold tracking-[0.22em] text-primary uppercase">
-            <Orbit aria-hidden="true" className="size-5" />
-            GoForLift
-          </div>
-          <p className="mb-3 text-sm font-medium tracking-[0.18em] text-muted-foreground uppercase">
-            Development foundation
-          </p>
-          <h1 className="max-w-3xl text-5xl leading-none font-bold tracking-tight sm:text-7xl">
-            Ready for liftoff.
-          </h1>
-          <p className="mt-6 max-w-2xl text-lg leading-8 text-muted-foreground">
-            The React application, typed routing, server-state client, Tailwind
-            design system, and Express API foundation are configured.
-          </p>
-          <div className="mt-8 flex flex-wrap gap-3">
-            <Button onClick={() => void health.refetch()}>
-              Check API status
-            </Button>
-            <Button asChild variant="outline">
-              <a
-                href="https://tanstack.com/router"
-                rel="noreferrer"
-                target="_blank"
-              >
-                Router documentation
-              </a>
-            </Button>
-          </div>
-        </section>
-
-        <aside className="rounded-xl border border-border bg-surface p-6 shadow-2xl shadow-black/20">
-          <div className="flex items-center justify-between gap-4">
-            <div>
-              <p className="text-xs font-semibold tracking-[0.2em] text-muted-foreground uppercase">
-                System status
-              </p>
-              <h2 className="mt-2 text-xl font-semibold">Foundation check</h2>
-            </div>
-            <Activity aria-hidden="true" className="size-6 text-primary" />
-          </div>
-          <div className="mt-8 flex items-center gap-3 border-t border-border pt-6">
-            <span
-              aria-hidden="true"
-              className={`size-2.5 rounded-full ${systemStatus.dotColor}`}
-            />
-            <p aria-live="polite" className="font-medium">
-              {systemStatus.message}
-            </p>
-          </div>
-        </aside>
-      </div>
-    </main>
-  );
-}
-
-function getSystemStatus(isPending: boolean, isConnected: boolean) {
-  if (isPending) {
-    return {
-      dotColor: 'bg-muted-foreground',
-      message: 'Contacting API…',
-    };
-  }
-
-  if (isConnected) {
-    return {
-      dotColor: 'bg-primary',
-      message: 'API and PostgreSQL connected',
-    };
-  }
-
-  return {
-    dotColor: 'bg-destructive',
-    message: 'API or PostgreSQL unavailable',
-  };
-}
+export const Route = createFileRoute('/')({ component: WelcomePage });
diff --git a/apps/web/src/styles.css b/apps/web/src/styles.css
index c181765..0a33600 100644
--- a/apps/web/src/styles.css
+++ b/apps/web/src/styles.css
@@ -56,3 +56,27 @@ button,
 a {
   -webkit-tap-highlight-color: transparent;
 }
+
+.welcome-starfield {
+  position: relative;
+  background-color: #010307;
+}
+
+.welcome-panel {
+  border: 1px solid transparent;
+}
+
+@media (min-width: 640px) {
+  .welcome-panel {
+    border-radius: 1.5rem;
+    background: linear-gradient(
+      160deg,
+      rgb(11 25 36 / 50%),
+      rgb(6 16 24 / 56%)
+    );
+    box-shadow:
+      0 24px 80px rgb(0 0 0 / 45%),
+      inset 0 1px 0 rgb(255 255 255 / 4%);
+    backdrop-filter: blur(8px);
+  }
+}
diff --git a/docs/mockups/welcome-page-a1.png b/docs/mockups/welcome-page-a1.png
new file mode 100644
index 0000000..d1fbeb9
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