diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..0174015
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,10 @@
+# Firebase – copy to .env and fill with your Firebase project config
+# Get these from Firebase Console → Project settings → General → Your apps
+
+VITE_FIREBASE_API_KEY=
+VITE_FIREBASE_AUTH_DOMAIN=
+VITE_FIREBASE_DATABASE_URL=
+VITE_FIREBASE_PROJECT_ID=
+VITE_FIREBASE_STORAGE_BUCKET=
+VITE_FIREBASE_MESSAGING_SENDER_ID=
+VITE_FIREBASE_APP_ID=
diff --git a/.gitignore b/.gitignore
index a547bf3..7c3d27f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,8 @@ node_modules
 dist
 dist-ssr
 *.local
+.env
+.env.local
 
 # Editor directories and files
 .vscode/*
diff --git a/docs/auth-options-vite-react.md b/docs/auth-options-vite-react.md
new file mode 100644
index 0000000..1c130ef
--- /dev/null
+++ b/docs/auth-options-vite-react.md
@@ -0,0 +1,63 @@
+# Auth options for Vite + React (SPA)
+
+In **Next.js**, **NextAuth.js** (now **Auth.js**) is the standard: it gives you OAuth (Google, GitHub, etc.), sessions, callbacks, and JWT/cookies on the server.
+
+For a **Vite + React** app (client-side SPA), there is no single “NextAuth for Vite.” You pick by how much you want to host yourself vs use a service.
+
+---
+
+## 1. **Firebase Authentication** (what this project uses)
+
+- **What it is:** Google’s auth service; add SDK, configure providers (e.g. Google), get sign-in in the browser.
+- **Pros:** Free tier, no backend required for basic “Sign in with Google,” works great with Vite + React.
+- **Cons:** You’re tied to Firebase; for custom session logic you still need your own backend.
+- **Use when:** You want the fastest “Sign in with Google” (or email link, etc.) with no backend.
+
+---
+
+## 2. **Clerk**
+
+- **What it is:** Hosted auth (like Auth0) with pre-built React components and APIs.
+- **Pros:** Drop-in `<SignIn />` / `<SignUp />`, many providers, user management dashboard, works with any frontend (including Vite + React).
+- **Cons:** Paid after free tier; vendor lock-in.
+- **Use when:** You want a “NextAuth-like” experience (components + dashboard) without running your own auth server.
+
+---
+
+## 3. **Auth0** (Okta)
+
+- **What it is:** Hosted identity platform; SDK + hosted login pages or embedded UI.
+- **Pros:** Enterprise-ready, many providers, fine-grained controls.
+- **Cons:** Can be heavy and costly for small apps.
+- **Use when:** You need enterprise features or already use Okta.
+
+---
+
+## 4. **Supabase Auth**
+
+- **What it is:** Auth layer from Supabase (DB + realtime + storage).
+- **Pros:** Google, magic link, email/password; integrates with Supabase DB and RLS.
+- **Cons:** Makes most sense if you use Supabase for data.
+- **Use when:** Your backend (or “BaaS”) is Supabase.
+
+---
+
+## 5. **Auth.js (formerly NextAuth) + your own backend**
+
+- **What it is:** The same library NextAuth uses; you run it on **Express**, **Fastify**, or another Node server. Your Vite app is just a client that talks to that API.
+- **Pros:** Full control, sessions/callbacks like in Next.js, same mental model as NextAuth.
+- **Cons:** You build and run the backend; CORS and cookie/session handling for SPA.
+- **Use when:** You want “NextAuth” behavior (sessions, callbacks, multiple providers) with an Express (or similar) API and a Vite React frontend.
+
+---
+
+## Summary
+
+| Need                         | Good fit              |
+|-----------------------------|------------------------|
+| “Sign in with Google” only  | **Firebase Auth**      |
+| Pre-built UI + dashboard    | **Clerk**              |
+| Backend is Supabase         | **Supabase Auth**      |
+| NextAuth-style + Express    | **Auth.js on Express** |
+
+This app uses **Firebase Auth** for a simple, backend-free Google sign-in that works well with Vite + React.
diff --git a/index.html b/index.html
index 735f383..8df2b46 100644
--- a/index.html
+++ b/index.html
@@ -4,7 +4,7 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/vite.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>grateful-journal</title>
+    <title>Grateful Journal</title>
   </head>
   <body>
     <div id="root"></div>
diff --git a/package-lock.json b/package-lock.json
index dc79e4d..1a9c368 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,8 +8,10 @@
       "name": "grateful-journal",
       "version": "0.0.0",
       "dependencies": {
+        "firebase": "^12.9.0",
         "react": "^19.2.0",
-        "react-dom": "^19.2.0"
+        "react-dom": "^19.2.0",
+        "react-router-dom": "^7.13.0"
       },
       "devDependencies": {
         "@eslint/js": "^9.39.1",
@@ -907,6 +909,645 @@
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
+    "node_modules/@firebase/ai": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/@firebase/ai/-/ai-2.8.0.tgz",
+      "integrity": "sha512-grWYGFPsSo+pt+6CYeKR0kWnUfoLLS3xgWPvNrhAS5EPxl6xWq7+HjDZqX24yLneETyl45AVgDsTbVgxeWeRfg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/app-check-interop-types": "0.3.3",
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x",
+        "@firebase/app-types": "0.x"
+      }
+    },
+    "node_modules/@firebase/analytics": {
+      "version": "0.10.19",
+      "resolved": "https://registry.npmjs.org/@firebase/analytics/-/analytics-0.10.19.tgz",
+      "integrity": "sha512-3wU676fh60gaiVYQEEXsbGS4HbF2XsiBphyvvqDbtC1U4/dO4coshbYktcCHq+HFaGIK07iHOh4pME0hEq1fcg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/installations": "0.6.19",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/analytics-compat": {
+      "version": "0.2.25",
+      "resolved": "https://registry.npmjs.org/@firebase/analytics-compat/-/analytics-compat-0.2.25.tgz",
+      "integrity": "sha512-fdzoaG0BEKbqksRDhmf4JoyZf16Wosrl0Y7tbZtJyVDOOwziE0vrFjmZuTdviL0yhak+Nco6rMsUUbkbD+qb6Q==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/analytics": "0.10.19",
+        "@firebase/analytics-types": "0.8.3",
+        "@firebase/component": "0.7.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/analytics-types": {
+      "version": "0.8.3",
+      "resolved": "https://registry.npmjs.org/@firebase/analytics-types/-/analytics-types-0.8.3.tgz",
+      "integrity": "sha512-VrIp/d8iq2g501qO46uGz3hjbDb8xzYMrbu8Tp0ovzIzrvJZ2fvmj649gTjge/b7cCCcjT0H37g1gVtlNhnkbg==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@firebase/app": {
+      "version": "0.14.8",
+      "resolved": "https://registry.npmjs.org/@firebase/app/-/app-0.14.8.tgz",
+      "integrity": "sha512-WiE9uCGRLUnShdjb9iP20sA3ToWrBbNXr14/N5mow7Nls9dmKgfGaGX5cynLvrltxq2OrDLh1VDNaUgsnS/k/g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "idb": "7.1.1",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@firebase/app-check": {
+      "version": "0.11.0",
+      "resolved": "https://registry.npmjs.org/@firebase/app-check/-/app-check-0.11.0.tgz",
+      "integrity": "sha512-XAvALQayUMBJo58U/rxW02IhsesaxxfWVmVkauZvGEz3vOAjMEQnzFlyblqkc2iAaO82uJ2ZVyZv9XzPfxjJ6w==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/app-check-compat": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/@firebase/app-check-compat/-/app-check-compat-0.4.0.tgz",
+      "integrity": "sha512-UfK2Q8RJNjYM/8MFORltZRG9lJj11k0nW84rrffiKvcJxLf1jf6IEjCIkCamykHE73C6BwqhVfhIBs69GXQV0g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/app-check": "0.11.0",
+        "@firebase/app-check-types": "0.5.3",
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/app-check-interop-types": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/@firebase/app-check-interop-types/-/app-check-interop-types-0.3.3.tgz",
+      "integrity": "sha512-gAlxfPLT2j8bTI/qfe3ahl2I2YcBQ8cFIBdhAQA4I2f3TndcO+22YizyGYuttLHPQEpWkhmpFW60VCFEPg4g5A==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@firebase/app-check-types": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/@firebase/app-check-types/-/app-check-types-0.5.3.tgz",
+      "integrity": "sha512-hyl5rKSj0QmwPdsAxrI5x1otDlByQ7bvNvVt8G/XPO2CSwE++rmSVf3VEhaeOR4J8ZFaF0Z0NDSmLejPweZ3ng==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@firebase/app-compat": {
+      "version": "0.5.8",
+      "resolved": "https://registry.npmjs.org/@firebase/app-compat/-/app-compat-0.5.8.tgz",
+      "integrity": "sha512-4De6SUZ36zozl9kh5rZSxKWULpgty27rMzZ6x+xkoo7+NWyhWyFdsdvhFsWhTw/9GGj0wXIcbTjwHYCUIUuHyg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/app": "0.14.8",
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@firebase/app-types": {
+      "version": "0.9.3",
+      "resolved": "https://registry.npmjs.org/@firebase/app-types/-/app-types-0.9.3.tgz",
+      "integrity": "sha512-kRVpIl4vVGJ4baogMDINbyrIOtOxqhkZQg4jTq3l8Lw6WSk0xfpEYzezFu+Kl4ve4fbPl79dvwRtaFqAC/ucCw==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@firebase/auth": {
+      "version": "1.12.0",
+      "resolved": "https://registry.npmjs.org/@firebase/auth/-/auth-1.12.0.tgz",
+      "integrity": "sha512-zkvLpsrxynWHk07qGrUDfCSqKf4AvfZGEqJ7mVCtYGjNNDbGE71k0Yn84rg8QEZu4hQw1BC0qDEHzpNVBcSVmA==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x",
+        "@react-native-async-storage/async-storage": "^2.2.0"
+      },
+      "peerDependenciesMeta": {
+        "@react-native-async-storage/async-storage": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@firebase/auth-compat": {
+      "version": "0.6.2",
+      "resolved": "https://registry.npmjs.org/@firebase/auth-compat/-/auth-compat-0.6.2.tgz",
+      "integrity": "sha512-8UhCzF6pav9bw/eXA8Zy1QAKssPRYEYXaWagie1ewLTwHkXv6bKp/j6/IwzSYQP67sy/BMFXIFaCCsoXzFLr7A==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/auth": "1.12.0",
+        "@firebase/auth-types": "0.13.0",
+        "@firebase/component": "0.7.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/auth-interop-types": {
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/@firebase/auth-interop-types/-/auth-interop-types-0.2.4.tgz",
+      "integrity": "sha512-JPgcXKCuO+CWqGDnigBtvo09HeBs5u/Ktc2GaFj2m01hLarbxthLNm7Fk8iOP1aqAtXV+fnnGj7U28xmk7IwVA==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@firebase/auth-types": {
+      "version": "0.13.0",
+      "resolved": "https://registry.npmjs.org/@firebase/auth-types/-/auth-types-0.13.0.tgz",
+      "integrity": "sha512-S/PuIjni0AQRLF+l9ck0YpsMOdE8GO2KU6ubmBB7P+7TJUCQDa3R1dlgYm9UzGbbePMZsp0xzB93f2b/CgxMOg==",
+      "license": "Apache-2.0",
+      "peerDependencies": {
+        "@firebase/app-types": "0.x",
+        "@firebase/util": "1.x"
+      }
+    },
+    "node_modules/@firebase/component": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/@firebase/component/-/component-0.7.0.tgz",
+      "integrity": "sha512-wR9En2A+WESUHexjmRHkqtaVH94WLNKt6rmeqZhSLBybg4Wyf0Umk04SZsS6sBq4102ZsDBFwoqMqJYj2IoDSg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@firebase/data-connect": {
+      "version": "0.3.12",
+      "resolved": "https://registry.npmjs.org/@firebase/data-connect/-/data-connect-0.3.12.tgz",
+      "integrity": "sha512-baPddcoNLj/+vYo+HSJidJUdr5W4OkhT109c5qhR8T1dJoZcyJpkv/dFpYlw/VJ3dV66vI8GHQFrmAZw/xUS4g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/auth-interop-types": "0.2.4",
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/database": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@firebase/database/-/database-1.1.0.tgz",
+      "integrity": "sha512-gM6MJFae3pTyNLoc9VcJNuaUDej0ctdjn3cVtILo3D5lpp0dmUHHLFN/pUKe7ImyeB1KAvRlEYxvIHNF04Filg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/app-check-interop-types": "0.3.3",
+        "@firebase/auth-interop-types": "0.2.4",
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "faye-websocket": "0.11.4",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@firebase/database-compat": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/@firebase/database-compat/-/database-compat-2.1.0.tgz",
+      "integrity": "sha512-8nYc43RqxScsePVd1qe1xxvWNf0OBnbwHxmXJ7MHSuuTVYFO3eLyLW3PiCKJ9fHnmIz4p4LbieXwz+qtr9PZDg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/database": "1.1.0",
+        "@firebase/database-types": "1.0.16",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@firebase/database-types": {
+      "version": "1.0.16",
+      "resolved": "https://registry.npmjs.org/@firebase/database-types/-/database-types-1.0.16.tgz",
+      "integrity": "sha512-xkQLQfU5De7+SPhEGAXFBnDryUWhhlFXelEg2YeZOQMCdoe7dL64DDAd77SQsR+6uoXIZY5MB4y/inCs4GTfcw==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/app-types": "0.9.3",
+        "@firebase/util": "1.13.0"
+      }
+    },
+    "node_modules/@firebase/firestore": {
+      "version": "4.11.0",
+      "resolved": "https://registry.npmjs.org/@firebase/firestore/-/firestore-4.11.0.tgz",
+      "integrity": "sha512-Zb88s8rssBd0J2Tt+NUXMPt2sf+Dq7meatKiJf5t9oto1kZ8w9gK59Koe1uPVbaKfdgBp++N/z0I4G/HamyEhg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "@firebase/webchannel-wrapper": "1.0.5",
+        "@grpc/grpc-js": "~1.9.0",
+        "@grpc/proto-loader": "^0.7.8",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/firestore-compat": {
+      "version": "0.4.5",
+      "resolved": "https://registry.npmjs.org/@firebase/firestore-compat/-/firestore-compat-0.4.5.tgz",
+      "integrity": "sha512-yVX1CkVvqBI4qbA56uZo42xFA4TNU0ICQ+9AFDvYq9U9Xu6iAx9lFDAk/tN+NGereQQXXCSnpISwc/oxsQqPLA==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/firestore": "4.11.0",
+        "@firebase/firestore-types": "3.0.3",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/firestore-types": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@firebase/firestore-types/-/firestore-types-3.0.3.tgz",
+      "integrity": "sha512-hD2jGdiWRxB/eZWF89xcK9gF8wvENDJkzpVFb4aGkzfEaKxVRD1kjz1t1Wj8VZEp2LCB53Yx1zD8mrhQu87R6Q==",
+      "license": "Apache-2.0",
+      "peerDependencies": {
+        "@firebase/app-types": "0.x",
+        "@firebase/util": "1.x"
+      }
+    },
+    "node_modules/@firebase/functions": {
+      "version": "0.13.1",
+      "resolved": "https://registry.npmjs.org/@firebase/functions/-/functions-0.13.1.tgz",
+      "integrity": "sha512-sUeWSb0rw5T+6wuV2o9XNmh9yHxjFI9zVGFnjFi+n7drTEWpl7ZTz1nROgGrSu472r+LAaj+2YaSicD4R8wfbw==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/app-check-interop-types": "0.3.3",
+        "@firebase/auth-interop-types": "0.2.4",
+        "@firebase/component": "0.7.0",
+        "@firebase/messaging-interop-types": "0.2.3",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/functions-compat": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/@firebase/functions-compat/-/functions-compat-0.4.1.tgz",
+      "integrity": "sha512-AxxUBXKuPrWaVNQ8o1cG1GaCAtXT8a0eaTDfqgS5VsRYLAR0ALcfqDLwo/QyijZj1w8Qf8n3Qrfy/+Im245hOQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/functions": "0.13.1",
+        "@firebase/functions-types": "0.6.3",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/functions-types": {
+      "version": "0.6.3",
+      "resolved": "https://registry.npmjs.org/@firebase/functions-types/-/functions-types-0.6.3.tgz",
+      "integrity": "sha512-EZoDKQLUHFKNx6VLipQwrSMh01A1SaL3Wg6Hpi//x6/fJ6Ee4hrAeswK99I5Ht8roiniKHw4iO0B1Oxj5I4plg==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@firebase/installations": {
+      "version": "0.6.19",
+      "resolved": "https://registry.npmjs.org/@firebase/installations/-/installations-0.6.19.tgz",
+      "integrity": "sha512-nGDmiwKLI1lerhwfwSHvMR9RZuIH5/8E3kgUWnVRqqL7kGVSktjLTWEMva7oh5yxQ3zXfIlIwJwMcaM5bK5j8Q==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/util": "1.13.0",
+        "idb": "7.1.1",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/installations-compat": {
+      "version": "0.2.19",
+      "resolved": "https://registry.npmjs.org/@firebase/installations-compat/-/installations-compat-0.2.19.tgz",
+      "integrity": "sha512-khfzIY3EI5LePePo7vT19/VEIH1E3iYsHknI/6ek9T8QCozAZshWT9CjlwOzZrKvTHMeNcbpo/VSOSIWDSjWdQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/installations": "0.6.19",
+        "@firebase/installations-types": "0.5.3",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/installations-types": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/@firebase/installations-types/-/installations-types-0.5.3.tgz",
+      "integrity": "sha512-2FJI7gkLqIE0iYsNQ1P751lO3hER+Umykel+TkLwHj6plzWVxqvfclPUZhcKFVQObqloEBTmpi2Ozn7EkCABAA==",
+      "license": "Apache-2.0",
+      "peerDependencies": {
+        "@firebase/app-types": "0.x"
+      }
+    },
+    "node_modules/@firebase/logger": {
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/@firebase/logger/-/logger-0.5.0.tgz",
+      "integrity": "sha512-cGskaAvkrnh42b3BA3doDWeBmuHFO/Mx5A83rbRDYakPjO9bJtRL3dX7javzc2Rr/JHZf4HlterTW2lUkfeN4g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@firebase/messaging": {
+      "version": "0.12.23",
+      "resolved": "https://registry.npmjs.org/@firebase/messaging/-/messaging-0.12.23.tgz",
+      "integrity": "sha512-cfuzv47XxqW4HH/OcR5rM+AlQd1xL/VhuaeW/wzMW1LFrsFcTn0GND/hak1vkQc2th8UisBcrkVcQAnOnKwYxg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/installations": "0.6.19",
+        "@firebase/messaging-interop-types": "0.2.3",
+        "@firebase/util": "1.13.0",
+        "idb": "7.1.1",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/messaging-compat": {
+      "version": "0.2.23",
+      "resolved": "https://registry.npmjs.org/@firebase/messaging-compat/-/messaging-compat-0.2.23.tgz",
+      "integrity": "sha512-SN857v/kBUvlQ9X/UjAqBoQ2FEaL1ZozpnmL1ByTe57iXkmnVVFm9KqAsTfmf+OEwWI4kJJe9NObtN/w22lUgg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/messaging": "0.12.23",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/messaging-interop-types": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/@firebase/messaging-interop-types/-/messaging-interop-types-0.2.3.tgz",
+      "integrity": "sha512-xfzFaJpzcmtDjycpDeCUj0Ge10ATFi/VHVIvEEjDNc3hodVBQADZ7BWQU7CuFpjSHE+eLuBI13z5F/9xOoGX8Q==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@firebase/performance": {
+      "version": "0.7.9",
+      "resolved": "https://registry.npmjs.org/@firebase/performance/-/performance-0.7.9.tgz",
+      "integrity": "sha512-UzybENl1EdM2I1sjYm74xGt/0JzRnU/0VmfMAKo2LSpHJzaj77FCLZXmYQ4oOuE+Pxtt8Wy2BVJEENiZkaZAzQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/installations": "0.6.19",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0",
+        "web-vitals": "^4.2.4"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/performance-compat": {
+      "version": "0.2.22",
+      "resolved": "https://registry.npmjs.org/@firebase/performance-compat/-/performance-compat-0.2.22.tgz",
+      "integrity": "sha512-xLKxaSAl/FVi10wDX/CHIYEUP13jXUjinL+UaNXT9ByIvxII5Ne5150mx6IgM8G6Q3V+sPiw9C8/kygkyHUVxg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/performance": "0.7.9",
+        "@firebase/performance-types": "0.2.3",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/performance-types": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/@firebase/performance-types/-/performance-types-0.2.3.tgz",
+      "integrity": "sha512-IgkyTz6QZVPAq8GSkLYJvwSLr3LS9+V6vNPQr0x4YozZJiLF5jYixj0amDtATf1X0EtYHqoPO48a9ija8GocxQ==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@firebase/remote-config": {
+      "version": "0.8.0",
+      "resolved": "https://registry.npmjs.org/@firebase/remote-config/-/remote-config-0.8.0.tgz",
+      "integrity": "sha512-sJz7C2VACeE257Z/3kY9Ap2WXbFsgsDLfaGfZmmToKAK39ipXxFan+vzB9CSbF6mP7bzjyzEnqPcMXhAnYE6fQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/installations": "0.6.19",
+        "@firebase/logger": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/remote-config-compat": {
+      "version": "0.2.21",
+      "resolved": "https://registry.npmjs.org/@firebase/remote-config-compat/-/remote-config-compat-0.2.21.tgz",
+      "integrity": "sha512-9+lm0eUycxbu8GO25JfJe4s6R2xlDqlVt0CR6CvN9E6B4AFArEV4qfLoDVRgIEB7nHKwvH2nYRocPWfmjRQTnw==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/logger": "0.5.0",
+        "@firebase/remote-config": "0.8.0",
+        "@firebase/remote-config-types": "0.5.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/remote-config-types": {
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/@firebase/remote-config-types/-/remote-config-types-0.5.0.tgz",
+      "integrity": "sha512-vI3bqLoF14L/GchtgayMiFpZJF+Ao3uR8WCde0XpYNkSokDpAKca2DxvcfeZv7lZUqkUwQPL2wD83d3vQ4vvrg==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@firebase/storage": {
+      "version": "0.14.0",
+      "resolved": "https://registry.npmjs.org/@firebase/storage/-/storage-0.14.0.tgz",
+      "integrity": "sha512-xWWbb15o6/pWEw8H01UQ1dC5U3rf8QTAzOChYyCpafV6Xki7KVp3Yaw2nSklUwHEziSWE9KoZJS7iYeyqWnYFA==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app": "0.x"
+      }
+    },
+    "node_modules/@firebase/storage-compat": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/@firebase/storage-compat/-/storage-compat-0.4.0.tgz",
+      "integrity": "sha512-vDzhgGczr1OfcOy285YAPur5pWDEvD67w4thyeCUh6Ys0izN9fNYtA1MJERmNBfqjqu0lg0FM5GLbw0Il21M+g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/component": "0.7.0",
+        "@firebase/storage": "0.14.0",
+        "@firebase/storage-types": "0.8.3",
+        "@firebase/util": "1.13.0",
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "@firebase/app-compat": "0.x"
+      }
+    },
+    "node_modules/@firebase/storage-types": {
+      "version": "0.8.3",
+      "resolved": "https://registry.npmjs.org/@firebase/storage-types/-/storage-types-0.8.3.tgz",
+      "integrity": "sha512-+Muk7g9uwngTpd8xn9OdF/D48uiQ7I1Fae7ULsWPuKoCH3HU7bfFPhxtJYzyhjdniowhuDpQcfPmuNRAqZEfvg==",
+      "license": "Apache-2.0",
+      "peerDependencies": {
+        "@firebase/app-types": "0.x",
+        "@firebase/util": "1.x"
+      }
+    },
+    "node_modules/@firebase/util": {
+      "version": "1.13.0",
+      "resolved": "https://registry.npmjs.org/@firebase/util/-/util-1.13.0.tgz",
+      "integrity": "sha512-0AZUyYUfpMNcztR5l09izHwXkZpghLgCUaAGjtMwXnCg3bj4ml5VgiwqOMOxJ+Nw4qN/zJAaOQBcJ7KGkWStqQ==",
+      "hasInstallScript": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "tslib": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      }
+    },
+    "node_modules/@firebase/webchannel-wrapper": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/@firebase/webchannel-wrapper/-/webchannel-wrapper-1.0.5.tgz",
+      "integrity": "sha512-+uGNN7rkfn41HLO0vekTFhTxk61eKa8mTpRGLO0QSqlQdKvIoGAvLp3ppdVIWbTGYJWM6Kp0iN+PjMIOcnVqTw==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/@grpc/grpc-js": {
+      "version": "1.9.15",
+      "resolved": "https://registry.npmjs.org/@grpc/grpc-js/-/grpc-js-1.9.15.tgz",
+      "integrity": "sha512-nqE7Hc0AzI+euzUwDAy0aY5hCp10r734gMGRdU+qOPX0XSceI2ULrcXB5U2xSc5VkWwalCj4M7GzCAygZl2KoQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@grpc/proto-loader": "^0.7.8",
+        "@types/node": ">=12.12.47"
+      },
+      "engines": {
+        "node": "^8.13.0 || >=10.10.0"
+      }
+    },
+    "node_modules/@grpc/proto-loader": {
+      "version": "0.7.15",
+      "resolved": "https://registry.npmjs.org/@grpc/proto-loader/-/proto-loader-0.7.15.tgz",
+      "integrity": "sha512-tMXdRCfYVixjuFK+Hk0Q1s38gV9zDiDJfWL3h1rv4Qc39oILCu1TRTDt7+fGUI8K4G1Fj125Hx/ru3azECWTyQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "lodash.camelcase": "^4.3.0",
+        "long": "^5.0.0",
+        "protobufjs": "^7.2.5",
+        "yargs": "^17.7.2"
+      },
+      "bin": {
+        "proto-loader-gen-types": "build/bin/proto-loader-gen-types.js"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/@humanfs/core": {
       "version": "0.19.1",
       "resolved": "https://registry.npmjs.org/@humanfs/core/-/core-0.19.1.tgz",
@@ -1009,6 +1650,70 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@protobufjs/aspromise": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/aspromise/-/aspromise-1.1.2.tgz",
+      "integrity": "sha512-j+gKExEuLmKwvz3OgROXtrJ2UG2x8Ch2YZUxahh+s1F2HZ+wAceUNLkvy6zKCPVRkU++ZWQrdxsUeQXmcg4uoQ==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/base64": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/base64/-/base64-1.1.2.tgz",
+      "integrity": "sha512-AZkcAA5vnN/v4PDqKyMR5lx7hZttPDgClv83E//FMNhR2TMcLUhfRUBHCmSl0oi9zMgDDqRUJkSxO3wm85+XLg==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/codegen": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@protobufjs/codegen/-/codegen-2.0.4.tgz",
+      "integrity": "sha512-YyFaikqM5sH0ziFZCN3xDC7zeGaB/d0IUb9CATugHWbd1FRFwWwt4ld4OYMPWu5a3Xe01mGAULCdqhMlPl29Jg==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/eventemitter": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/eventemitter/-/eventemitter-1.1.0.tgz",
+      "integrity": "sha512-j9ednRT81vYJ9OfVuXG6ERSTdEL1xVsNgqpkxMsbIabzSo3goCjDIveeGv5d03om39ML71RdmrGNjG5SReBP/Q==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/fetch": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/fetch/-/fetch-1.1.0.tgz",
+      "integrity": "sha512-lljVXpqXebpsijW71PZaCYeIcE5on1w5DlQy5WH6GLbFryLUrBD4932W/E2BSpfRJWseIL4v/KPgBFxDOIdKpQ==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "@protobufjs/aspromise": "^1.1.1",
+        "@protobufjs/inquire": "^1.1.0"
+      }
+    },
+    "node_modules/@protobufjs/float": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/float/-/float-1.0.2.tgz",
+      "integrity": "sha512-Ddb+kVXlXst9d+R9PfTIxh1EdNkgoRe5tOX6t01f1lYWOvJnSPDBlG241QLzcyPdoNTsblLUdujGSE4RzrTZGQ==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/inquire": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/inquire/-/inquire-1.1.0.tgz",
+      "integrity": "sha512-kdSefcPdruJiFMVSbn801t4vFK7KB/5gd2fYvrxhuJYg8ILrmn9SKSX2tZdV6V+ksulWqS7aXjBcRXl3wHoD9Q==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/path": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@protobufjs/path/-/path-1.1.2.tgz",
+      "integrity": "sha512-6JOcJ5Tm08dOHAbdR3GrvP+yUUfkjG5ePsHYczMFLq3ZmMkAD98cDgcT2iA1lJ9NVwFd4tH/iSSoe44YWkltEA==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/pool": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/pool/-/pool-1.1.0.tgz",
+      "integrity": "sha512-0kELaGSIDBKvcgS4zkjz1PeddatrjYcmMWOlAuAPwAeccUrPHdUqo/J6LiymHHEiJT5NrF1UVwxY14f+fy4WQw==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@protobufjs/utf8": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@protobufjs/utf8/-/utf8-1.1.0.tgz",
+      "integrity": "sha512-Vvn3zZrhQZkkBE8LSuW3em98c0FwgO4nxzv6OdSxPKJIEKY2bGbHn+mhGIPerzI4twdxaP8/0+06HBpwf345Lw==",
+      "license": "BSD-3-Clause"
+    },
     "node_modules/@rolldown/pluginutils": {
       "version": "1.0.0-rc.3",
       "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-rc.3.tgz",
@@ -1429,7 +2134,6 @@
       "version": "24.10.13",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-24.10.13.tgz",
       "integrity": "sha512-oH72nZRfDv9lADUBSo104Aq7gPHpQZc4BTx38r9xf9pg5LfP6EzSyH2n7qFmmxRQXh7YlUXODcYsg6PuTDSxGg==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "undici-types": "~7.16.0"
@@ -1798,11 +2502,19 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
     },
+    "node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
       "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "color-convert": "^2.0.1"
@@ -1931,11 +2643,24 @@
         "url": "https://github.com/chalk/chalk?sponsor=1"
       }
     },
+    "node_modules/cliui": {
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-8.0.1.tgz",
+      "integrity": "sha512-BSeNnyus75C4//NQ9gQt1/csTXyo/8Sb+afLAkzAptFuMsod9HFokGNudZpi/oQV73hnVK+sR+5PVRMd+Dr7YQ==",
+      "license": "ISC",
+      "dependencies": {
+        "string-width": "^4.2.0",
+        "strip-ansi": "^6.0.1",
+        "wrap-ansi": "^7.0.0"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/color-convert": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
       "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "color-name": "~1.1.4"
@@ -1948,7 +2673,6 @@
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/concat-map": {
@@ -1965,6 +2689,19 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/cookie": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-1.1.1.tgz",
+      "integrity": "sha512-ei8Aos7ja0weRpFzJnEA9UHJ/7XQmqglbRwnf2ATjcB9Wq874VKH9kfjjirM6UhU2/E5fFYadylyhFldcqSidQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -2019,6 +2756,12 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/emoji-regex": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+      "license": "MIT"
+    },
     "node_modules/esbuild": {
       "version": "0.27.3",
       "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.27.3.tgz",
@@ -2065,7 +2808,6 @@
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.2.0.tgz",
       "integrity": "sha512-WUj2qlxaQtO4g6Pq5c29GTcWGDyd8itL8zTlipgECz3JesAiiOKotd8JU6otB3PACgG6xkJUyVhboMS+bje/jA==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6"
@@ -2289,6 +3031,18 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/faye-websocket": {
+      "version": "0.11.4",
+      "resolved": "https://registry.npmjs.org/faye-websocket/-/faye-websocket-0.11.4.tgz",
+      "integrity": "sha512-CzbClwlXAuiRQAlUyfqPgvPoNKTckTPGfwZV4ZdAhVcP2lh9KUxJg2b5GkE7XbjKQ3YJnQ9z6D9ntLAlB+tP8g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "websocket-driver": ">=0.5.1"
+      },
+      "engines": {
+        "node": ">=0.8.0"
+      }
+    },
     "node_modules/fdir": {
       "version": "6.5.0",
       "resolved": "https://registry.npmjs.org/fdir/-/fdir-6.5.0.tgz",
@@ -2337,6 +3091,42 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/firebase": {
+      "version": "12.9.0",
+      "resolved": "https://registry.npmjs.org/firebase/-/firebase-12.9.0.tgz",
+      "integrity": "sha512-CwwTYoqZg6KxygPOaaJqIc4aoLvo0RCRrXoln9GoxLE8QyAwTydBaSLGVlR4WPcuOgN3OEL0tJLT1H4IU/dv7w==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@firebase/ai": "2.8.0",
+        "@firebase/analytics": "0.10.19",
+        "@firebase/analytics-compat": "0.2.25",
+        "@firebase/app": "0.14.8",
+        "@firebase/app-check": "0.11.0",
+        "@firebase/app-check-compat": "0.4.0",
+        "@firebase/app-compat": "0.5.8",
+        "@firebase/app-types": "0.9.3",
+        "@firebase/auth": "1.12.0",
+        "@firebase/auth-compat": "0.6.2",
+        "@firebase/data-connect": "0.3.12",
+        "@firebase/database": "1.1.0",
+        "@firebase/database-compat": "2.1.0",
+        "@firebase/firestore": "4.11.0",
+        "@firebase/firestore-compat": "0.4.5",
+        "@firebase/functions": "0.13.1",
+        "@firebase/functions-compat": "0.4.1",
+        "@firebase/installations": "0.6.19",
+        "@firebase/installations-compat": "0.2.19",
+        "@firebase/messaging": "0.12.23",
+        "@firebase/messaging-compat": "0.2.23",
+        "@firebase/performance": "0.7.9",
+        "@firebase/performance-compat": "0.2.22",
+        "@firebase/remote-config": "0.8.0",
+        "@firebase/remote-config-compat": "0.2.21",
+        "@firebase/storage": "0.14.0",
+        "@firebase/storage-compat": "0.4.0",
+        "@firebase/util": "1.13.0"
+      }
+    },
     "node_modules/flat-cache": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/flat-cache/-/flat-cache-4.0.1.tgz",
@@ -2383,6 +3173,15 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/get-caller-file": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
+      "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
+      "license": "ISC",
+      "engines": {
+        "node": "6.* || 8.* || >= 10.*"
+      }
+    },
     "node_modules/glob-parent": {
       "version": "6.0.2",
       "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-6.0.2.tgz",
@@ -2436,6 +3235,18 @@
         "hermes-estree": "0.25.1"
       }
     },
+    "node_modules/http-parser-js": {
+      "version": "0.5.10",
+      "resolved": "https://registry.npmjs.org/http-parser-js/-/http-parser-js-0.5.10.tgz",
+      "integrity": "sha512-Pysuw9XpUq5dVc/2SMHpuTY01RFl8fttgcyunjL7eEMhGM3cI4eOmiCycJDVCo/7O7ClfQD3SaI6ftDzqOXYMA==",
+      "license": "MIT"
+    },
+    "node_modules/idb": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/idb/-/idb-7.1.1.tgz",
+      "integrity": "sha512-gchesWBzyvGHRO9W8tzUWFDycow5gwjvFKfyV9FF32Y7F50yZMp7mP+T2mJIWFx49zicqyC4uefHM17o6xKIVQ==",
+      "license": "ISC"
+    },
     "node_modules/ignore": {
       "version": "5.3.2",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.3.2.tgz",
@@ -2483,6 +3294,15 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/is-fullwidth-code-point": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
+      "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/is-glob": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.3.tgz",
@@ -2610,6 +3430,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/lodash.camelcase": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/lodash.camelcase/-/lodash.camelcase-4.3.0.tgz",
+      "integrity": "sha512-TwuEnCnxbc3rAvhf/LbG7tJUDzhqXyFnv3dtzLOPgCG/hODL7WFnsbwktkD7yUV0RrreP/l1PALq/YSg6VvjlA==",
+      "license": "MIT"
+    },
     "node_modules/lodash.merge": {
       "version": "4.6.2",
       "resolved": "https://registry.npmjs.org/lodash.merge/-/lodash.merge-4.6.2.tgz",
@@ -2617,6 +3443,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/long": {
+      "version": "5.3.2",
+      "resolved": "https://registry.npmjs.org/long/-/long-5.3.2.tgz",
+      "integrity": "sha512-mNAgZ1GmyNhD7AuqnTG3/VQ26o760+ZYBPKjPvugO8+nLbYfX6TVpJPseBvopbdY+qpZ/lKUnmEc1LeZYS3QAA==",
+      "license": "Apache-2.0"
+    },
     "node_modules/lru-cache": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-5.1.1.tgz",
@@ -2822,6 +3654,30 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/protobufjs": {
+      "version": "7.5.4",
+      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.5.4.tgz",
+      "integrity": "sha512-CvexbZtbov6jW2eXAvLukXjXUW1TzFaivC46BpWc/3BpcCysb5Vffu+B3XHMm8lVEuy2Mm4XGex8hBSg1yapPg==",
+      "hasInstallScript": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "@protobufjs/aspromise": "^1.1.2",
+        "@protobufjs/base64": "^1.1.2",
+        "@protobufjs/codegen": "^2.0.4",
+        "@protobufjs/eventemitter": "^1.1.0",
+        "@protobufjs/fetch": "^1.1.0",
+        "@protobufjs/float": "^1.0.2",
+        "@protobufjs/inquire": "^1.1.0",
+        "@protobufjs/path": "^1.1.2",
+        "@protobufjs/pool": "^1.1.0",
+        "@protobufjs/utf8": "^1.1.0",
+        "@types/node": ">=13.7.0",
+        "long": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
     "node_modules/punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
@@ -2863,6 +3719,53 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/react-router": {
+      "version": "7.13.0",
+      "resolved": "https://registry.npmjs.org/react-router/-/react-router-7.13.0.tgz",
+      "integrity": "sha512-PZgus8ETambRT17BUm/LL8lX3Of+oiLaPuVTRH3l1eLvSPpKO3AvhAEb5N7ihAFZQrYDqkvvWfFh9p0z9VsjLw==",
+      "license": "MIT",
+      "dependencies": {
+        "cookie": "^1.0.1",
+        "set-cookie-parser": "^2.6.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "react": ">=18",
+        "react-dom": ">=18"
+      },
+      "peerDependenciesMeta": {
+        "react-dom": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/react-router-dom": {
+      "version": "7.13.0",
+      "resolved": "https://registry.npmjs.org/react-router-dom/-/react-router-dom-7.13.0.tgz",
+      "integrity": "sha512-5CO/l5Yahi2SKC6rGZ+HDEjpjkGaG/ncEP7eWFTvFxbHP8yeeI0PxTDjimtpXYlR3b3i9/WIL4VJttPrESIf2g==",
+      "license": "MIT",
+      "dependencies": {
+        "react-router": "7.13.0"
+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
+        "react": ">=18",
+        "react-dom": ">=18"
+      }
+    },
+    "node_modules/require-directory": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
+      "integrity": "sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/resolve-from": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
@@ -2918,6 +3821,26 @@
         "fsevents": "~2.3.2"
       }
     },
+    "node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/scheduler": {
       "version": "0.27.0",
       "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.27.0.tgz",
@@ -2934,6 +3857,12 @@
         "semver": "bin/semver.js"
       }
     },
+    "node_modules/set-cookie-parser": {
+      "version": "2.7.2",
+      "resolved": "https://registry.npmjs.org/set-cookie-parser/-/set-cookie-parser-2.7.2.tgz",
+      "integrity": "sha512-oeM1lpU/UvhTxw+g3cIfxXHyJRc/uidd3yK1P242gzHds0udQBYzs3y8j4gCCW+ZJ7ad0yctld8RYO+bdurlvw==",
+      "license": "MIT"
+    },
     "node_modules/shebang-command": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
@@ -2967,6 +3896,32 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/string-width": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
+      "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
+      "license": "MIT",
+      "dependencies": {
+        "emoji-regex": "^8.0.0",
+        "is-fullwidth-code-point": "^3.0.0",
+        "strip-ansi": "^6.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/strip-ansi": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+      "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+      "license": "MIT",
+      "dependencies": {
+        "ansi-regex": "^5.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/strip-json-comments": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-3.1.1.tgz",
@@ -3023,6 +3978,12 @@
         "typescript": ">=4.8.4"
       }
     },
+    "node_modules/tslib": {
+      "version": "2.8.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
+      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
+      "license": "0BSD"
+    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -3078,7 +4039,6 @@
       "version": "7.16.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.16.0.tgz",
       "integrity": "sha512-Zz+aZWSj8LE6zoxD+xrjh4VfkIG8Ya6LvYkZqtUQGJPZjYl53ypCaUwWqo7eI0x66KBGeRo+mlBEkMSeSZ38Nw==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/update-browserslist-db": {
@@ -3197,6 +4157,35 @@
         }
       }
     },
+    "node_modules/web-vitals": {
+      "version": "4.2.4",
+      "resolved": "https://registry.npmjs.org/web-vitals/-/web-vitals-4.2.4.tgz",
+      "integrity": "sha512-r4DIlprAGwJ7YM11VZp4R884m0Vmgr6EAKe3P+kO0PPj3Unqyvv59rczf6UiGcb9Z8QxZVcqKNwv/g0WNdWwsw==",
+      "license": "Apache-2.0"
+    },
+    "node_modules/websocket-driver": {
+      "version": "0.7.4",
+      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.4.tgz",
+      "integrity": "sha512-b17KeDIQVjvb0ssuSDF2cYXSg2iztliJ4B9WdsuB6J952qCPKmnVq4DyW5motImXHDC1cBT/1UezrJVsKw5zjg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "http-parser-js": ">=0.5.1",
+        "safe-buffer": ">=5.1.0",
+        "websocket-extensions": ">=0.1.1"
+      },
+      "engines": {
+        "node": ">=0.8.0"
+      }
+    },
+    "node_modules/websocket-extensions": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.4.tgz",
+      "integrity": "sha512-OqedPIGOfsDlo31UNwYbCFMSaO9m9G/0faIHj5/dZFDMFqPTcx6UwqyOy3COEaEOg/9VsGIpdqn62W5KhoKSpg==",
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.8.0"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -3223,6 +4212,32 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/wrap-ansi": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
+      "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
+      "license": "MIT",
+      "dependencies": {
+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/wrap-ansi?sponsor=1"
+      }
+    },
+    "node_modules/y18n": {
+      "version": "5.0.8",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
+      "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/yallist": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
@@ -3230,6 +4245,33 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/yargs": {
+      "version": "17.7.2",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.7.2.tgz",
+      "integrity": "sha512-7dSzzRQ++CKnNI/krKnYRV7JKKPUXMEh61soaHKg9mrWEhzFWhFnxPxGl+69cD1Ou63C13NUPCnmIcrvqCuM6w==",
+      "license": "MIT",
+      "dependencies": {
+        "cliui": "^8.0.1",
+        "escalade": "^3.1.1",
+        "get-caller-file": "^2.0.5",
+        "require-directory": "^2.1.1",
+        "string-width": "^4.2.3",
+        "y18n": "^5.0.5",
+        "yargs-parser": "^21.1.1"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/yargs-parser": {
+      "version": "21.1.1",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-21.1.1.tgz",
+      "integrity": "sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
diff --git a/package.json b/package.json
index 91bd9d2..1dbb565 100644
--- a/package.json
+++ b/package.json
@@ -10,8 +10,10 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "firebase": "^12.9.0",
     "react": "^19.2.0",
-    "react-dom": "^19.2.0"
+    "react-dom": "^19.2.0",
+    "react-router-dom": "^7.13.0"
   },
   "devDependencies": {
     "@eslint/js": "^9.39.1",
diff --git a/src/App.css b/src/App.css
index b9d355d..dd3341e 100644
--- a/src/App.css
+++ b/src/App.css
@@ -1,42 +1,277 @@
+/* Grateful Journal – green palette. Responsive layout. */
+
 #root {
-  max-width: 1280px;
-  margin: 0 auto;
-  padding: 2rem;
+  min-height: 100vh;
+  min-height: 100dvh;
+  margin: 0;
+  padding: 0;
+  overflow-x: hidden;
+}
+
+/* ----- Protected route loading ----- */
+.protected-route__loading {
+  min-height: 100vh;
+  min-height: 100dvh;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 1rem;
+  background: var(--color-bg-soft);
+  color: var(--color-text-muted);
+}
+
+.protected-route__spinner {
+  width: 32px;
+  height: 32px;
+  border: 3px solid var(--color-border);
+  border-top-color: var(--color-primary);
+  border-radius: 50%;
+  animation: login-spin 0.7s linear infinite;
+}
+
+@keyframes login-spin {
+  to { transform: rotate(360deg); }
+}
+
+/* ----- Login page – green accent aesthetic ----- */
+.login-page {
+  min-height: 100vh;
+  min-height: 100dvh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: linear-gradient(160deg, var(--color-bg-soft) 0%, var(--color-accent-light) 100%);
+  padding: clamp(0.75rem, 3vw, 1.5rem);
+  padding-left: max(clamp(0.75rem, 3vw, 1.5rem), env(safe-area-inset-left));
+  padding-right: max(clamp(0.75rem, 3vw, 1.5rem), env(safe-area-inset-right));
+}
+
+.login-page__loading {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 1rem;
+  color: var(--color-text-muted);
+}
+
+.login-page__spinner {
+  width: 32px;
+  height: 32px;
+  border: 3px solid var(--color-border);
+  border-top-color: var(--color-primary);
+  border-radius: 50%;
+  animation: login-spin 0.7s linear infinite;
+}
+
+/* Login card – green accent */
+.login-card {
+  background: var(--color-surface);
+  padding: clamp(1.5rem, 6vw, 2.75rem);
+  border-radius: 16px;
+  border-top: 4px solid var(--color-primary);
+  box-shadow: 0 8px 32px rgba(27, 230, 44, 0.08), 0 2px 12px rgba(0, 0, 0, 0.04);
+  max-width: 400px;
+  width: 100%;
+  min-width: 0;
   text-align: center;
 }
 
-.logo {
-  height: 6em;
-  padding: 1.5em;
-  will-change: filter;
-  transition: filter 300ms;
-}
-.logo:hover {
-  filter: drop-shadow(0 0 2em #646cffaa);
-}
-.logo.react:hover {
-  filter: drop-shadow(0 0 2em #61dafbaa);
+.login-card__brand {
+  margin-bottom: 1.75rem;
 }
 
-@keyframes logo-spin {
-  from {
-    transform: rotate(0deg);
+.login-card__title {
+  margin: 0 0 0.5rem;
+  font-size: clamp(1.5rem, 4.5vw, 1.875rem);
+  font-weight: 600;
+  color: var(--color-primary);
+  letter-spacing: -0.02em;
+}
+
+.login-card__tagline {
+  margin: 0;
+  color: var(--color-text-muted);
+  font-size: clamp(0.875rem, 2vw, 0.9375rem);
+  line-height: 1.5;
+}
+
+.login-card__actions {
+  display: flex;
+  flex-direction: column;
+  align-items: stretch;
+  gap: 1rem;
+}
+
+.login-card__error {
+  margin: 0;
+  padding: 0.65rem 0.75rem;
+  color: #b91c1c;
+  font-size: 0.875rem;
+  background: #fef2f2;
+  border-radius: 8px;
+  word-break: break-word;
+  text-align: left;
+}
+
+/* Sign in with Google button – standard Google-style UI */
+.google-sign-in-btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.75rem;
+  width: 100%;
+  min-height: 52px;
+  padding: 0.75rem 1.25rem;
+  font-size: 1rem;
+  font-weight: 500;
+  color: #3c4043;
+  background: #fff;
+  border: 1px solid #dadce0;
+  border-radius: 8px;
+  cursor: pointer;
+  transition: background 0.2s, box-shadow 0.2s;
+  -webkit-tap-highlight-color: transparent;
+}
+
+.google-sign-in-btn:hover:not(:disabled) {
+  background: #f8f9fa;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
+}
+
+.google-sign-in-btn:active:not(:disabled) {
+  background: #f1f3f4;
+}
+
+.google-sign-in-btn:disabled {
+  opacity: 0.7;
+  cursor: not-allowed;
+}
+
+.google-sign-in-btn__logo {
+  flex-shrink: 0;
+}
+
+.google-sign-in-btn__label {
+  color: inherit;
+}
+
+/* ----- Home page ----- */
+.home-page {
+  min-height: 100vh;
+  min-height: 100dvh;
+  background: var(--color-bg-soft, #f1eee1);
+  padding: clamp(0.75rem, 3vw, 1.5rem);
+  padding-left: max(clamp(0.75rem, 3vw, 1.5rem), env(safe-area-inset-left));
+  padding-right: max(clamp(0.75rem, 3vw, 1.5rem), env(safe-area-inset-right));
+}
+
+.home-header {
+  max-width: 720px;
+  margin: 0 auto 1.5rem;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  flex-wrap: wrap;
+  gap: 0.75rem;
+}
+
+.home-header h1 {
+  margin: 0;
+  font-size: clamp(1.2rem, 3.5vw, 1.5rem);
+  color: var(--color-text, #1a1a1a);
+  word-break: break-word;
+}
+
+.home-user {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  flex-wrap: wrap;
+  min-width: 0;
+}
+
+.home-username {
+  font-weight: 500;
+  color: var(--color-text, #1a1a1a);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  max-width:  min(50vw, 180px);
+}
+
+.home-sign-out {
+  min-height: 44px;
+  padding: 0.5rem 0.75rem;
+  font-size: 0.875rem;
+  color: var(--color-text-muted, #555);
+  background: transparent;
+  border: 1px solid var(--color-border, #cff2dc);
+  border-radius: 6px;
+  cursor: pointer;
+  transition: background 0.2s, color 0.2s;
+  -webkit-tap-highlight-color: transparent;
+}
+
+.home-sign-out:hover {
+  background: var(--color-surface, #ffffff);
+  color: var(--color-text, #1a1a1a);
+}
+
+.home-main {
+  max-width: 720px;
+  margin: 0 auto;
+  background: var(--color-surface, #ffffff);
+  padding: clamp(1rem, 4vw, 2rem);
+  border-radius: 12px;
+  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
+  min-width: 0;
+}
+
+.home-welcome {
+  margin: 0 0 0.5rem;
+  font-size: clamp(1.15rem, 3vw, 1.35rem);
+  color: var(--color-text, #1a1a1a);
+  word-break: break-word;
+}
+
+.home-sub {
+  margin: 0;
+  color: var(--color-text-muted, #555);
+  font-size: clamp(0.875rem, 2vw, 0.95rem);
+}
+
+.home-login-link {
+  display: inline-block;
+  margin-top: 1rem;
+  min-height: 48px;
+  padding: 0.75rem 1.25rem;
+  line-height: 1.25;
+  color: #fff;
+  background: var(--color-primary, #1be62c);
+  border-radius: 8px;
+  text-decoration: none;
+  font-weight: 500;
+  transition: background 0.2s;
+  -webkit-tap-highlight-color: transparent;
+}
+
+.home-login-link:hover {
+  background: var(--color-primary-hover, #18c925);
+}
+
+/* Small screens: stack header and tighten spacing */
+@media (max-width: 480px) {
+  .home-header {
+    flex-direction: column;
+    align-items: flex-start;
   }
-  to {
-    transform: rotate(360deg);
+
+  .home-user {
+    width: 100%;
+  }
+
+  .home-username {
+    max-width: none;
   }
 }
-
-@media (prefers-reduced-motion: no-preference) {
-  a:nth-of-type(2) .logo {
-    animation: logo-spin infinite 20s linear;
-  }
-}
-
-.card {
-  padding: 2em;
-}
-
-.read-the-docs {
-  color: #888;
-}
diff --git a/src/App.tsx b/src/App.tsx
index 3d7ded3..e014b3b 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,34 +1,28 @@
-import { useState } from 'react'
-import reactLogo from './assets/react.svg'
-import viteLogo from '/vite.svg'
+import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom'
+import { AuthProvider } from './contexts/AuthContext'
+import { ProtectedRoute } from './components/ProtectedRoute'
+import HomePage from './pages/HomePage'
+import LoginPage from './pages/LoginPage'
 import './App.css'
 
 function App() {
-  const [count, setCount] = useState(0)
-
   return (
-    <>
-      <div>
-        <a href="https://vite.dev" target="_blank">
-          <img src={viteLogo} className="logo" alt="Vite logo" />
-        </a>
-        <a href="https://react.dev" target="_blank">
-          <img src={reactLogo} className="logo react" alt="React logo" />
-        </a>
-      </div>
-      <h1>Vite + React</h1>
-      <div className="card">
-        <button onClick={() => setCount((count) => count + 1)}>
-          count is {count}
-        </button>
-        <p>
-          Edit <code>src/App.tsx</code> and save to test HMR
-        </p>
-      </div>
-      <p className="read-the-docs">
-        Click on the Vite and React logos to learn more
-      </p>
-    </>
+    <AuthProvider>
+      <BrowserRouter>
+        <Routes>
+          <Route
+            path="/"
+            element={
+              <ProtectedRoute>
+                <HomePage />
+              </ProtectedRoute>
+            }
+          />
+          <Route path="/login" element={<LoginPage />} />
+          <Route path="*" element={<Navigate to="/login" replace />} />
+        </Routes>
+      </BrowserRouter>
+    </AuthProvider>
   )
 }
 
diff --git a/src/components/GoogleSignInButton.tsx b/src/components/GoogleSignInButton.tsx
new file mode 100644
index 0000000..63b2032
--- /dev/null
+++ b/src/components/GoogleSignInButton.tsx
@@ -0,0 +1,53 @@
+import type { ButtonHTMLAttributes } from 'react'
+
+/** Google "G" logo – standard multicolor mark */
+function GoogleLogo({ className }: { className?: string }) {
+  return (
+    <svg
+      className={className}
+      width="20"
+      height="20"
+      viewBox="0 0 24 24"
+      aria-hidden
+    >
+      <path
+        fill="#4285F4"
+        d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"
+      />
+      <path
+        fill="#34A853"
+        d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"
+      />
+      <path
+        fill="#FBBC05"
+        d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"
+      />
+      <path
+        fill="#EA4335"
+        d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"
+      />
+    </svg>
+  )
+}
+
+type Props = ButtonHTMLAttributes<HTMLButtonElement> & {
+  loading?: boolean
+}
+
+export function GoogleSignInButton({ loading = false, disabled, className = '', ...rest }: Props) {
+  return (
+    <button
+      type="button"
+      className={`google-sign-in-btn ${className}`.trim()}
+      disabled={disabled ?? loading}
+      aria-busy={loading}
+      aria-label={loading ? 'Signing in…' : 'Sign in with Google'}
+      {...rest}
+    >
+      <GoogleLogo className="google-sign-in-btn__logo" />
+      <span className="google-sign-in-btn__label">
+        {loading ? 'Signing in…' : 'Sign in with Google'}
+      </span>
+    </button>
+  )
+}
diff --git a/src/components/LoginCard.tsx b/src/components/LoginCard.tsx
new file mode 100644
index 0000000..b2430d7
--- /dev/null
+++ b/src/components/LoginCard.tsx
@@ -0,0 +1,21 @@
+import type { ReactNode } from 'react'
+
+type Props = {
+  title: string
+  tagline?: string
+  children: ReactNode
+}
+
+export function LoginCard({ title, tagline, children }: Props) {
+  return (
+    <div className="login-card">
+      <div className="login-card__brand">
+        <h1 className="login-card__title">{title}</h1>
+        {tagline && <p className="login-card__tagline">{tagline}</p>}
+      </div>
+      <div className="login-card__actions">
+        {children}
+      </div>
+    </div>
+  )
+}
diff --git a/src/components/ProtectedRoute.tsx b/src/components/ProtectedRoute.tsx
new file mode 100644
index 0000000..51dfd89
--- /dev/null
+++ b/src/components/ProtectedRoute.tsx
@@ -0,0 +1,27 @@
+import { useEffect, type ReactNode } from 'react'
+import { Navigate, useLocation } from 'react-router-dom'
+import { useAuth } from '../contexts/AuthContext'
+
+type Props = {
+  children: ReactNode
+}
+
+export function ProtectedRoute({ children }: Props) {
+  const { user, loading } = useAuth()
+  const location = useLocation()
+
+  if (loading) {
+    return (
+      <div className="protected-route__loading" aria-live="polite">
+        <span className="protected-route__spinner" aria-hidden />
+        <p>Loading…</p>
+      </div>
+    )
+  }
+
+  if (!user) {
+    return <Navigate to="/login" state={{ from: location }} replace />
+  }
+
+  return <>{children}</>
+}
diff --git a/src/contexts/AuthContext.tsx b/src/contexts/AuthContext.tsx
new file mode 100644
index 0000000..d457942
--- /dev/null
+++ b/src/contexts/AuthContext.tsx
@@ -0,0 +1,68 @@
+import {
+  createContext,
+  useContext,
+  useEffect,
+  useState,
+  type ReactNode,
+} from 'react'
+import {
+  browserLocalPersistence,
+  onAuthStateChanged,
+  setPersistence,
+  signInWithPopup,
+  signOut as firebaseSignOut,
+  type User,
+} from 'firebase/auth'
+import { auth, googleProvider } from '../lib/firebase'
+
+type AuthContextValue = {
+  user: User | null
+  loading: boolean
+  signInWithGoogle: () => Promise<void>
+  signOut: () => Promise<void>
+}
+
+const AuthContext = createContext<AuthContextValue | null>(null)
+
+export function AuthProvider({ children }: { children: ReactNode }) {
+  const [user, setUser] = useState<User | null>(null)
+  const [loading, setLoading] = useState(true)
+
+  useEffect(() => {
+    const unsubscribe = onAuthStateChanged(auth, (u) => {
+      setUser(u)
+      setLoading(false)
+    })
+    return () => unsubscribe()
+  }, [])
+
+  async function signInWithGoogle() {
+    await setPersistence(auth, browserLocalPersistence)
+    await signInWithPopup(auth, googleProvider)
+  }
+
+  async function signOut() {
+    await firebaseSignOut(auth)
+  }
+
+  const value: AuthContextValue = {
+    user,
+    loading,
+    signInWithGoogle,
+    signOut,
+  }
+
+  return (
+    <AuthContext.Provider value={value}>
+      {children}
+    </AuthContext.Provider>
+  )
+}
+
+export function useAuth() {
+  const ctx = useContext(AuthContext)
+  if (ctx == null) {
+    throw new Error('useAuth must be used within AuthProvider')
+  }
+  return ctx
+}
diff --git a/src/index.css b/src/index.css
index 08a3ac9..f67d0ee 100644
--- a/src/index.css
+++ b/src/index.css
@@ -1,12 +1,29 @@
+/* Grateful Journal – green palette from Coolors */
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+}
+
 :root {
-  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
+  font-family: system-ui, -apple-system, sans-serif;
   line-height: 1.5;
   font-weight: 400;
+  /* Responsive base: 16px at 320px, scales up to 18px by 768px */
+  font-size: clamp(1rem, 0.9rem + 0.25vw, 1.125rem);
 
-  color-scheme: light dark;
-  color: rgba(255, 255, 255, 0.87);
-  background-color: #242424;
+  --color-primary: #1be62c;
+  --color-primary-hover: #18c925;
+  --color-bg-soft: #f1eee1;
+  --color-surface: #ffffff;
+  --color-accent-light: #cff2dc;
+  --color-accent-bright: #c3fd2f;
+  --color-text: #1a1a1a;
+  --color-text-muted: #555;
+  --color-border: #cff2dc;
 
+  color: var(--color-text);
+  background-color: var(--color-bg-soft);
   font-synthesis: none;
   text-rendering: optimizeLegibility;
   -webkit-font-smoothing: antialiased;
@@ -15,54 +32,37 @@
 
 a {
   font-weight: 500;
-  color: #646cff;
+  color: var(--color-primary);
   text-decoration: inherit;
 }
 a:hover {
-  color: #535bf2;
+  color: var(--color-primary-hover);
+}
+
+html {
+  overflow-x: hidden;
+  -webkit-text-size-adjust: 100%;
 }
 
 body {
   margin: 0;
-  display: flex;
-  place-items: center;
-  min-width: 320px;
+  min-width: 280px;
   min-height: 100vh;
+  min-height: 100dvh;
+  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
 }
 
 h1 {
-  font-size: 3.2em;
-  line-height: 1.1;
+  font-size: 1.75rem;
+  line-height: 1.2;
 }
 
 button {
-  border-radius: 8px;
-  border: 1px solid transparent;
-  padding: 0.6em 1.2em;
-  font-size: 1em;
-  font-weight: 500;
   font-family: inherit;
-  background-color: #1a1a1a;
   cursor: pointer;
-  transition: border-color 0.25s;
-}
-button:hover {
-  border-color: #646cff;
 }
 button:focus,
 button:focus-visible {
-  outline: 4px auto -webkit-focus-ring-color;
-}
-
-@media (prefers-color-scheme: light) {
-  :root {
-    color: #213547;
-    background-color: #ffffff;
-  }
-  a:hover {
-    color: #747bff;
-  }
-  button {
-    background-color: #f9f9f9;
-  }
+  outline: 2px solid var(--color-primary);
+  outline-offset: 2px;
 }
diff --git a/src/lib/firebase.ts b/src/lib/firebase.ts
new file mode 100644
index 0000000..a3a42f0
--- /dev/null
+++ b/src/lib/firebase.ts
@@ -0,0 +1,16 @@
+import { initializeApp } from 'firebase/app'
+import { getAuth, GoogleAuthProvider } from 'firebase/auth'
+
+const firebaseConfig = {
+  apiKey: import.meta.env.VITE_FIREBASE_API_KEY,
+  authDomain: import.meta.env.VITE_FIREBASE_AUTH_DOMAIN,
+  databaseURL: import.meta.env.VITE_FIREBASE_DATABASE_URL,
+  projectId: import.meta.env.VITE_FIREBASE_PROJECT_ID,
+  storageBucket: import.meta.env.VITE_FIREBASE_STORAGE_BUCKET,
+  messagingSenderId: import.meta.env.VITE_FIREBASE_MESSAGING_SENDER_ID,
+  appId: import.meta.env.VITE_FIREBASE_APP_ID,
+}
+
+const app = initializeApp(firebaseConfig)
+export const auth = getAuth(app)
+export const googleProvider = new GoogleAuthProvider()
diff --git a/src/pages/HomePage.tsx b/src/pages/HomePage.tsx
new file mode 100644
index 0000000..021bd9d
--- /dev/null
+++ b/src/pages/HomePage.tsx
@@ -0,0 +1,47 @@
+import { useAuth } from '../contexts/AuthContext'
+import { Link } from 'react-router-dom'
+
+export default function HomePage() {
+  const { user, loading, signOut } = useAuth()
+
+  if (loading) {
+    return (
+      <div className="home-page">
+        <p>Loading…</p>
+      </div>
+    )
+  }
+
+  if (!user) {
+    return (
+      <div className="home-page">
+        <h1>Grateful Journal</h1>
+        <p>Sign in to start your journal.</p>
+        <Link to="/login" className="home-login-link">
+          Go to login
+        </Link>
+      </div>
+    )
+  }
+
+  const displayName =
+    user.displayName ?? user.email ?? 'there'
+
+  return (
+    <div className="home-page">
+      <header className="home-header">
+        <h1>Grateful Journal</h1>
+        <div className="home-user">
+          <span className="home-username">{displayName}</span>
+          <button type="button" className="home-sign-out" onClick={() => signOut()}>
+            Sign out
+          </button>
+        </div>
+      </header>
+      <main className="home-main">
+        <p className="home-welcome">Hello, {displayName}.</p>
+        <p className="home-sub">Your writing space will go here.</p>
+      </main>
+    </div>
+  )
+}
diff --git a/src/pages/LoginPage.tsx b/src/pages/LoginPage.tsx
new file mode 100644
index 0000000..daea991
--- /dev/null
+++ b/src/pages/LoginPage.tsx
@@ -0,0 +1,61 @@
+import { useAuth } from '../contexts/AuthContext'
+import { useNavigate } from 'react-router-dom'
+import { useEffect, useState } from 'react'
+import { GoogleSignInButton } from '../components/GoogleSignInButton'
+import { LoginCard } from '../components/LoginCard'
+
+export default function LoginPage() {
+  const { user, loading, signInWithGoogle } = useAuth()
+  const navigate = useNavigate()
+  const [signingIn, setSigningIn] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (loading) return
+    if (user) {
+      navigate('/', { replace: true })
+    }
+  }, [user, loading, navigate])
+
+  async function handleGoogleSignIn() {
+    setError(null)
+    setSigningIn(true)
+    try {
+      await signInWithGoogle()
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Sign-in failed')
+    } finally {
+      setSigningIn(false)
+    }
+  }
+
+  if (loading) {
+    return (
+      <div className="login-page">
+        <div className="login-page__loading" aria-live="polite">
+          <span className="login-page__spinner" aria-hidden />
+          <p>Loading…</p>
+        </div>
+      </div>
+    )
+  }
+
+  return (
+    <div className="login-page">
+      <LoginCard
+        title="Grateful Journal"
+        tagline="A minimal, private space for gratitude and reflection. No feeds, no noise—just you and your thoughts."
+      >
+        <GoogleSignInButton
+          loading={signingIn}
+          onClick={handleGoogleSignIn}
+        />
+        {error && (
+          <p className="login-card__error" role="alert">
+            {error}
+          </p>
+        )}
+      </LoginCard>
+    </div>
+  )
+}