diff --git a/.gitignore b/.gitignore
index 9703c86..9f663c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -111,3 +111,6 @@ dist
 
 # TernJS port file
 .tern-port
+
+# JetBrains
+.idea/
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..3a64555
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,122 @@
+
+Default to using Bun instead of Node.js.
+
+- Use `bun <file>` instead of `node <file>` or `ts-node <file>`
+- Use `bun test` instead of `jest` or `vitest`
+- Use `bun build <file.html|file.ts|file.css>` instead of `webpack` or `esbuild`
+- Use `bun install` instead of `npm install` or `yarn install` or `pnpm install`
+- Use `bun run <script>` instead of `npm run <script>` or `yarn run <script>` or `pnpm run <script>`
+- Use `bunx <package> <command>` instead of `npx <package> <command>`
+- Bun automatically loads .env, so don't use dotenv.
+
+## APIs
+
+- `Bun.serve()` supports WebSockets, HTTPS, and routes. Don't use `express`.
+- `bun:sqlite` for SQLite. Don't use `better-sqlite3`.
+- `Bun.redis` for Redis. Don't use `ioredis`.
+- `Bun.sql` for Postgres. Don't use `pg` or `postgres.js`.
+- `WebSocket` is built-in. Don't use `ws`.
+- Prefer `Bun.file` over `node:fs`'s readFile/writeFile
+- Bun.$`ls` instead of execa.
+
+## Testing
+
+Use `bun test` to run tests.
+
+```ts#index.test.ts
+import { test, expect } from "bun:test";
+
+test("hello world", () => {
+  expect(1).toBe(1);
+});
+```
+
+## Frontend
+
+Use HTML imports with `Bun.serve()`. Don't use `vite`. HTML imports fully support React, CSS, Tailwind.
+
+Server:
+
+```ts#index.ts
+import index from "./index.html"
+
+Bun.serve({
+  routes: {
+    "/": index,
+    "/api/users/:id": {
+      GET: (req) => {
+        return new Response(JSON.stringify({ id: req.params.id }));
+      },
+    },
+  },
+  // optional websocket support
+  websocket: {
+    open: (ws) => {
+      ws.send("Hello, world!");
+    },
+    message: (ws, message) => {
+      ws.send(message);
+    },
+    close: (ws) => {
+      // handle close
+    }
+  },
+  development: {
+    hmr: true,
+    console: true,
+  }
+})
+```
+
+HTML files can import .tsx, .jsx or .js files directly and Bun's bundler will transpile & bundle automatically. `<link>` tags can point to stylesheets and Bun's CSS bundler will bundle.
+
+```html#index.html
+<html>
+  <body>
+    <h1>Hello, world!</h1>
+    <script type="module" src="./frontend.tsx"></script>
+  </body>
+</html>
+```
+
+With the following `frontend.tsx`:
+
+```tsx#frontend.tsx
+import React from "react";
+import { createRoot } from "react-dom/client";
+
+// import .css files directly and it works
+import './index.css';
+
+const root = createRoot(document.body);
+
+export default function Frontend() {
+  return <h1>Hello, world!</h1>;
+}
+
+root.render(<Frontend />);
+```
+
+Then, run index.ts
+
+```sh
+bun --hot ./index.ts
+```
+
+For more information, read the Bun API docs in `node_modules/bun-types/docs/**.mdx`.
+
+## Project invariants (Budget 2.0)
+
+- `src/domain/` is pure: no React, no IndexedDB, no `Date.now()`, no `new Date()`
+  without an explicit argument. It must be testable with no DOM.
+- Money is a float. Always round with `roundMoney` from `src/domain/money.ts`
+  after any division, after any FX conversion, and before persisting.
+- When splitting an amount, never round the last part independently. Compute it
+  as `total - sum(others)` so the parts sum exactly to the whole.
+- `MonthId` is the string `"YYYY-MM"`. Stored data never contains `Date` objects.
+- The envelope rollover fold has exactly one implementation, in
+  `src/domain/fold.ts`. Year and summary views aggregate over it — they never
+  reimplement the math.
+- Over-budget is always allowed. Never add validation that blocks it.
+- Base path comes from `BUN_PUBLIC_BASE_PATH`; never hardcode a subpath.
+- Read the spec at `docs/superpowers/specs/2026-09-01-budget-app-design.md`.
diff --git a/build.ts b/build.ts
new file mode 100644
index 0000000..15778df
--- /dev/null
+++ b/build.ts
@@ -0,0 +1,24 @@
+import tailwind from "bun-plugin-tailwind";
+import { rm } from "node:fs/promises";
+import path from "node:path";
+
+const outdir = path.join(process.cwd(), "dist");
+await rm(outdir, { recursive: true, force: true });
+
+const entrypoints = [...new Bun.Glob("src/**/*.html").scanSync()];
+
+const result = await Bun.build({
+  entrypoints,
+  outdir,
+  plugins: [tailwind],
+  minify: true,
+  target: "browser",
+  sourcemap: "linked",
+  define: {
+    "process.env.NODE_ENV": JSON.stringify("production"),
+  },
+});
+
+for (const output of result.outputs) {
+  console.log(` ${path.relative(process.cwd(), output.path)}  ${(output.size / 1024).toFixed(1)} KB`);
+}
diff --git a/bun-env.d.ts b/bun-env.d.ts
new file mode 100644
index 0000000..3111ba5
--- /dev/null
+++ b/bun-env.d.ts
@@ -0,0 +1,19 @@
+// Generated by `bun init`
+
+declare module "*.svg" {
+  /**
+   * A path to the SVG file
+   */
+  const path: `${string}.svg`;
+  export = path;
+}
+
+declare module "*.css" {}
+
+declare module "*.module.css" {
+  /**
+   * A record of class names to their corresponding CSS module classes
+   */
+  const classes: { readonly [key: string]: string };
+  export = classes;
+}
diff --git a/bun.lock b/bun.lock
new file mode 100644
index 0000000..bff47b9
--- /dev/null
+++ b/bun.lock
@@ -0,0 +1,169 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "bun-react-template",
+      "dependencies": {
+        "@radix-ui/react-label": "^2.1.7",
+        "@radix-ui/react-select": "^2.2.6",
+        "@radix-ui/react-slot": "^1.2.3",
+        "bun-plugin-tailwind": "^0.1.2",
+        "class-variance-authority": "^0.7.1",
+        "clsx": "^2.1.1",
+        "lucide-react": "^1",
+        "react": "^19",
+        "react-dom": "^19",
+        "tailwind-merge": "^3.3.1",
+        "tw-animate-css": "^1.4.0",
+      },
+      "devDependencies": {
+        "@types/bun": "latest",
+        "@types/react": "^19",
+        "@types/react-dom": "^19",
+        "tailwindcss": "^4.1.11",
+      },
+    },
+  },
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+
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+
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+
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+
+    "@oven/bun-darwin-aarch64": ["@oven/bun-darwin-aarch64@1.4.0", "", { "os": "darwin", "cpu": "arm64" }, "sha512-GCpf8QuFLsyioVawP5HrMxA1ZRBlu6Hq9RNnSc3UTUWAzIxBso9trjoZczw1HdgpqSssFkszfIV2zmOzFTjhkw=="],
+
+    "@oven/bun-darwin-x64": ["@oven/bun-darwin-x64@1.4.0", "", { "os": "darwin", "cpu": "x64" }, "sha512-cIrhwOr0SPEraewznhC+c/k6TG8bwFn5uZ4EJuXwjiKJLcAF36q7/bGjWkeXSe48JwMcPRUR054JXF7+cRwSSA=="],
+
+    "@oven/bun-freebsd-aarch64": ["@oven/bun-freebsd-aarch64@1.4.0", "", { "os": "freebsd", "cpu": "arm64" }, "sha512-09x7wnjMR6M5KGBDBhVl2CpfoCIQOkVDbPX2KfIhpXv4N6grbWE7dfLPw/Ydi9gaUMGhU7UKhoz444Nu6RCycA=="],
+
+    "@oven/bun-freebsd-x64": ["@oven/bun-freebsd-x64@1.4.0", "", { "os": "freebsd", "cpu": "x64" }, "sha512-dRwzti/qJqV1HWplU27iUWUqp+f2DtFSf2yqQKSb+HH2dDOC//Uqd9u/A5h1DMsLszfP5OGP9UwQIKxVwFODaA=="],
+
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+
+    "@oven/bun-linux-aarch64-android": ["@oven/bun-linux-aarch64-android@1.4.0", "", { "os": "android", "cpu": "arm64" }, "sha512-HpPIxJfDNPBPhiBNMyZoo/dOLijARfsx5j72vNuLtaTvl0Hh7HUculxjsOQ2WSyGoCgqXMEr1Qqjab1im9u1RA=="],
+
+    "@oven/bun-linux-aarch64-musl": ["@oven/bun-linux-aarch64-musl@1.4.0", "", { "os": "linux", "cpu": "arm64" }, "sha512-RUjAAkJ/CdNV++zVxyANWshPc73CECYsfhk0fWAkoJjtywxJ2BwXzI6nopBBDMfs0HS+fhRGn6zGwU8ccxLeJg=="],
+
+    "@oven/bun-linux-x64": ["@oven/bun-linux-x64@1.4.0", "", { "os": "linux", "cpu": "x64" }, "sha512-Du44zebtPXJujvMLmtIxEQ6ykOhYt7L/Q+YIGVm+Yy+Pj/fpOnq60ggwIpKp/pGAFbYHNiTrA3JTjuZ9MTbZIg=="],
+
+    "@oven/bun-linux-x64-android": ["@oven/bun-linux-x64-android@1.4.0", "", { "os": "android", "cpu": "x64" }, "sha512-u++KyLlfMn36yWz+AgJs+fZtS46UFDNpSSZhrcitkytONtNwq0X6Q9BDVEFXxYl/+Eec0xme1rb6MgW+U35WeA=="],
+
+    "@oven/bun-linux-x64-musl": ["@oven/bun-linux-x64-musl@1.4.0", "", { "os": "linux", "cpu": "x64" }, "sha512-C1Dv+ISL8YKEKM9jAHzNifOcRUoziy6UMxh+yVXjUCP6QnbRhENDHLaIWWkQZJyBLTn0I3xozflorAlHiGzGqA=="],
+
+    "@oven/bun-windows-aarch64": ["@oven/bun-windows-aarch64@1.4.0", "", { "os": "win32", "cpu": "arm64" }, "sha512-FBAYaQpJBP0asgqzL6NFUfjdQqsV+kvTpJ/eWxPKj+RcDgIfPSuE8kvQuPYu5pa8u8JTujYMjmuyvHxVuQsInA=="],
+
+    "@oven/bun-windows-x64": ["@oven/bun-windows-x64@1.4.0", "", { "os": "win32", "cpu": "x64" }, "sha512-jRKv1NPLznMSZY5BEWciMF7zv0Tiyo2pQSxAJ3w+YWJ6y3VWNJQQQdLlV5Jx8lbOFDrJdrc9dD3GV17k3BP41A=="],
+
+    "@radix-ui/number": ["@radix-ui/number@1.1.3", "", {}, "sha512-Road2bidD0uu/1BGDOWNdPI06g0lIRy6IF9GZcIrDK2KGItfor8IQwQa+yM2ERgHM1MmHxaxpTzk0/Jp42lNfA=="],
+
+    "@radix-ui/primitive": ["@radix-ui/primitive@1.1.7", "", {}, "sha512-rqWnm76nYT8HoNNqEjpgJ7Pw/DrBj5iBTrmEPo6HTX5+VJyBNOqTdv4g89G63HuR5g0AaENoAcH7Is5fF2kZ8Q=="],
+
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+
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+
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+
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+
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+
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+    "@radix-ui/react-use-size": ["@radix-ui/react-use-size@1.1.4", "", { "dependencies": { "@radix-ui/react-use-layout-effect": "1.1.4" }, "peerDependencies": { "@types/react": "*", "react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc" }, "optionalPeers": ["@types/react"] }, "sha512-D3anSY15EJoxrihpsXI6SMrmmonnQtR2ni7arO+Lfdg3O95b9hNXxONk8jA5C8ANdF/h5HMAxejgs8PWJ6rlhw=="],
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+    "@radix-ui/react-visually-hidden": ["@radix-ui/react-visually-hidden@1.2.11", "", { "dependencies": { "@radix-ui/react-primitive": "2.1.10" }, "peerDependencies": { "@types/react": "*", "@types/react-dom": "*", "react": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc", "react-dom": "^16.8 || ^17.0 || ^18.0 || ^19.0 || ^19.0.0-rc" }, "optionalPeers": ["@types/react", "@types/react-dom"] }, "sha512-NFS86RYYZb4/exihaESBGOpMJFz8MGLAfu3mOBSGByVnVPC9JPASfYubxd/8KbkQK0sYAv8lVQDEQukDX/qXvQ=="],
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+    "@types/bun": ["@types/bun@1.4.0", "", { "dependencies": { "bun-types": "1.4.0" } }, "sha512-K+lZULY23vRgK/CfTjFIV+tyifaNdSMlPh9j+6mQ/cLfpOznLyAuzgV/JQysyECpkBQLVMSyvjlr2fBUSA9wFQ=="],
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+    "@types/node": ["@types/node@26.4.0", "", { "dependencies": { "undici-types": "~8.3.0" } }, "sha512-faiGnoIrLH/V8cibOMEAZ8pMw6oXqSukl29ra4mN8GdaB2ZewzeaLj+INpV5N+Z1eKWzY+IzaIZH2EIR6YZRNQ=="],
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+    "@types/react-dom": ["@types/react-dom@19.2.5", "", { "peerDependencies": { "@types/react": "^19.2.0" } }, "sha512-fMPwH9v7r/pp43yUd2/Mbiex5KouJwwR3dzHkhLREUC6764VyDsqxhAxv6OFEYR1RhjOyD1naqba8ECDBe7ZQg=="],
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+
+    "bun": ["bun@1.4.0", "", { "optionalDependencies": { "@oven/bun-darwin-aarch64": "1.4.0", "@oven/bun-darwin-x64": "1.4.0", "@oven/bun-freebsd-aarch64": "1.4.0", "@oven/bun-freebsd-x64": "1.4.0", "@oven/bun-linux-aarch64": "1.4.0", "@oven/bun-linux-aarch64-android": "1.4.0", "@oven/bun-linux-aarch64-musl": "1.4.0", "@oven/bun-linux-x64": "1.4.0", "@oven/bun-linux-x64-android": "1.4.0", "@oven/bun-linux-x64-musl": "1.4.0", "@oven/bun-windows-aarch64": "1.4.0", "@oven/bun-windows-x64": "1.4.0" }, "os": [ "!aix", "!sunos", "!openbsd", ], "cpu": [ "x64", "arm64", ], "bin": { "bun": "bin/bun.exe", "bunx": "bin/bunx.exe" } }, "sha512-iRiFkc2W7UVpCyZXO9tod45TP9QCyN19fWqbpeN/jaM/K7uzeHYx/OSPsahMJazGKBgPsnxRt+4Jc43d8BcHZw=="],
+
+    "bun-plugin-tailwind": ["bun-plugin-tailwind@0.1.2", "", { "peerDependencies": { "bun": ">=1.0.0" } }, "sha512-41jNC1tZRSK3s1o7pTNrLuQG8kL/0vR/JgiTmZAJ1eHwe0w5j6HFPKeqEk0WAD13jfrUC7+ULuewFBBCoADPpg=="],
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+    "bun-types": ["bun-types@1.4.0", "", { "dependencies": { "@types/node": "*" } }, "sha512-iIKw23BspnQQYd3prITOBxeUsxBHnwzX6YJfGMuNOZzeNcMmVqzIIVGRm1l69ogaPQmb4wB6BN8mA5bE9YuC5Q=="],
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+    "class-variance-authority": ["class-variance-authority@0.7.1", "", { "dependencies": { "clsx": "^2.1.1" } }, "sha512-Ka+9Trutv7G8M6WT6SeiRWz792K5qEqIGEGzXKhAE6xOWAY6pPH8U+9IY3oCMv6kqTmLsv7Xh/2w2RigkePMsg=="],
+
+    "clsx": ["clsx@2.1.1", "", {}, "sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA=="],
+
+    "csstype": ["csstype@3.2.3", "", {}, "sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ=="],
+
+    "detect-node-es": ["detect-node-es@1.1.0", "", {}, "sha512-ypdmJU/TbBby2Dxibuv7ZLW3Bs1QEmM7nHjEANfohJLvE0XVujisn1qPJcZxg+qDucsr+bP6fLD1rPS3AhJ7EQ=="],
+
+    "get-nonce": ["get-nonce@1.0.1", "", {}, "sha512-FJhYRoDaiatfEkUK8HKlicmu/3SGFD51q3itKDGoSTysQJBnfOcxU5GxnhE1E6soB76MbT0MBtnKJuXyAx+96Q=="],
+
+    "lucide-react": ["lucide-react@1.39.0", "", { "peerDependencies": { "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0" } }, "sha512-y8nXoEwvqqIsF927NBWXODa4bfMrcUeEb/9sgpwFqg0gUjgn3j5Hznk+v7STmPgZ2iQ11JKlbQGdFRuTOwvYkA=="],
+
+    "react": ["react@19.2.8", "", {}, "sha512-PWaYA1L/q9u2u7xYQi+Y3L3Yfnie7XyLeaJICV1MGD6LprsBxcAqGjYyr0eY3p+QdsA+x/Irkt4Qif8D63+Sbw=="],
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+
+    "react-remove-scroll": ["react-remove-scroll@2.7.2", "", { "dependencies": { "react-remove-scroll-bar": "^2.3.7", "react-style-singleton": "^2.2.3", "tslib": "^2.1.0", "use-callback-ref": "^1.3.3", "use-sidecar": "^1.1.3" }, "peerDependencies": { "@types/react": "*", "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc" }, "optionalPeers": ["@types/react"] }, "sha512-Iqb9NjCCTt6Hf+vOdNIZGdTiH1QSqr27H/Ek9sv/a97gfueI/5h1s3yRi1nngzMUaOOToin5dI1dXKdXiF+u0Q=="],
+
+    "react-remove-scroll-bar": ["react-remove-scroll-bar@2.3.8", "", { "dependencies": { "react-style-singleton": "^2.2.2", "tslib": "^2.0.0" }, "peerDependencies": { "@types/react": "*", "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0" }, "optionalPeers": ["@types/react"] }, "sha512-9r+yi9+mgU33AKcj6IbT9oRCO78WriSj6t/cF8DWBZJ9aOGPOTEDvdUDz1FwKim7QXWwmHqtdHnRJfhAxEG46Q=="],
+
+    "react-style-singleton": ["react-style-singleton@2.2.3", "", { "dependencies": { "get-nonce": "^1.0.0", "tslib": "^2.0.0" }, "peerDependencies": { "@types/react": "*", "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc" }, "optionalPeers": ["@types/react"] }, "sha512-b6jSvxvVnyptAiLjbkWLE/lOnR4lfTtDAl+eUC7RZy+QQWc6wRzIV2CE6xBuMmDxc2qIihtDCZD5NPOFl7fRBQ=="],
+
+    "scheduler": ["scheduler@0.27.0", "", {}, "sha512-eNv+WrVbKu1f3vbYJT/xtiF5syA5HPIMtf9IgY/nKg0sWqzAUEvqY/xm7OcZc/qafLx/iO9FgOmeSAp4v5ti/Q=="],
+
+    "tailwind-merge": ["tailwind-merge@3.6.0", "", {}, "sha512-uxL7qAVQriqRQPAyK3pj66VqskWqoZ37PW94jwOTwNfq/z9oyu1V+eqrZqtR2+fCiXdYOZe/Modt8GtvqNzu+w=="],
+
+    "tailwindcss": ["tailwindcss@4.3.3", "", {}, "sha512-gOhV3P7ufE62QDGg1zVaTgCR+EtPv92k2nIhVcVKcLmxT1sUBsQGhnZj175j+MqRt4zLF7ic+sCYjfhxMxj7YQ=="],
+
+    "tslib": ["tslib@2.8.1", "", {}, "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="],
+
+    "tw-animate-css": ["tw-animate-css@1.4.0", "", {}, "sha512-7bziOlRqH0hJx80h/3mbicLW7o8qLsH5+RaLR2t+OHM3D0JlWGODQKQ4cxbK7WlvmUxpcj6Kgu6EKqjrGFe3QQ=="],
+
+    "undici-types": ["undici-types@8.3.0", "", {}, "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ=="],
+
+    "use-callback-ref": ["use-callback-ref@1.3.3", "", { "dependencies": { "tslib": "^2.0.0" }, "peerDependencies": { "@types/react": "*", "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc" }, "optionalPeers": ["@types/react"] }, "sha512-jQL3lRnocaFtu3V00JToYz/4QkNWswxijDaCVNZRiRTO3HQDLsdu1ZtmIUvV4yPp+rvWm5j0y0TG/S61cuijTg=="],
+
+    "use-sidecar": ["use-sidecar@1.1.3", "", { "dependencies": { "detect-node-es": "^1.1.0", "tslib": "^2.0.0" }, "peerDependencies": { "@types/react": "*", "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0 || ^19.0.0-rc" }, "optionalPeers": ["@types/react"] }, "sha512-Fedw0aZvkhynoPYlA5WXrMCAMm+nSWdZt6lzJQ7Ok8S6Q+VsHmHpRWndVRJ8Be0ZbkfPc5LRYH+5XrzXcEeLRQ=="],
+  }
+}
diff --git a/bunfig.toml b/bunfig.toml
new file mode 100644
index 0000000..0175d44
--- /dev/null
+++ b/bunfig.toml
@@ -0,0 +1,3 @@
+[serve.static]
+plugins = ["bun-plugin-tailwind"]
+env = "BUN_PUBLIC_*"
diff --git a/components.json b/components.json
new file mode 100644
index 0000000..a084701
--- /dev/null
+++ b/components.json
@@ -0,0 +1,21 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "new-york",
+  "rsc": false,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "styles/globals.css",
+    "baseColor": "neutral",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  },
+  "iconLibrary": "lucide"
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..8978645
--- /dev/null
+++ b/package.json
@@ -0,0 +1,30 @@
+{
+  "name": "bun-react-template",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "bun --hot src/index.ts",
+    "start": "NODE_ENV=production bun src/index.ts",
+    "build": "bun run build.ts"
+  },
+  "dependencies": {
+    "@radix-ui/react-label": "^2.1.7",
+    "@radix-ui/react-select": "^2.2.6",
+    "@radix-ui/react-slot": "^1.2.3",
+    "bun-plugin-tailwind": "^0.1.2",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
+    "lucide-react": "^1",
+    "react": "^19",
+    "react-dom": "^19",
+    "tailwind-merge": "^3.3.1",
+    "tw-animate-css": "^1.4.0"
+  },
+  "devDependencies": {
+    "@types/react": "^19",
+    "@types/react-dom": "^19",
+    "@types/bun": "latest",
+    "tailwindcss": "^4.1.11"
+  }
+}
diff --git a/src/App.tsx b/src/App.tsx
new file mode 100644
index 0000000..e6d31f7
--- /dev/null
+++ b/src/App.tsx
@@ -0,0 +1,4 @@
+export function App() {
+  return <h1 className="p-8 text-2xl font-semibold">Budget 2.0</h1>;
+}
+export default App;
diff --git a/src/components/ui/button.tsx b/src/components/ui/button.tsx
new file mode 100644
index 0000000..730e50f
--- /dev/null
+++ b/src/components/ui/button.tsx
@@ -0,0 +1,52 @@
+import { Slot } from "@radix-ui/react-slot";
+import { cva, type VariantProps } from "class-variance-authority";
+import * as React from "react";
+
+import { cn } from "@/lib/utils";
+
+const buttonVariants = cva(
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 shrink-0 [&_svg]:shrink-0 outline-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
+  {
+    variants: {
+      variant: {
+        default: "bg-primary text-primary-foreground hover:bg-primary/90",
+        destructive:
+          "bg-destructive text-white hover:bg-destructive/90 focus-visible:ring-destructive/20 dark:focus-visible:ring-destructive/40 dark:bg-destructive/60",
+        outline:
+          "border bg-background shadow-xs hover:bg-accent hover:text-accent-foreground dark:bg-input/30 dark:border-input dark:hover:bg-input/50",
+        secondary: "bg-secondary text-secondary-foreground hover:bg-secondary/80",
+        ghost: "hover:bg-accent hover:text-accent-foreground dark:hover:bg-accent/50",
+        link: "text-primary underline-offset-4 hover:underline",
+      },
+      size: {
+        default: "h-9 px-4 py-2 has-[>svg]:px-3",
+        sm: "h-8 rounded-md gap-1.5 px-3 has-[>svg]:px-2.5",
+        lg: "h-10 rounded-md px-6 has-[>svg]:px-4",
+        icon: "size-9",
+        "icon-sm": "size-8",
+        "icon-lg": "size-10",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  },
+);
+
+function Button({
+  className,
+  variant,
+  size,
+  asChild = false,
+  ...props
+}: React.ComponentProps<"button"> &
+  VariantProps<typeof buttonVariants> & {
+    asChild?: boolean;
+  }) {
+  const Comp = asChild ? Slot : "button";
+
+  return <Comp data-slot="button" className={cn(buttonVariants({ variant, size, className }))} {...props} />;
+}
+
+export { Button, buttonVariants };
diff --git a/src/components/ui/card.tsx b/src/components/ui/card.tsx
new file mode 100644
index 0000000..6b44ad4
--- /dev/null
+++ b/src/components/ui/card.tsx
@@ -0,0 +1,56 @@
+import * as React from "react";
+
+import { cn } from "@/lib/utils";
+
+function Card({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card"
+      className={cn("bg-card text-card-foreground flex flex-col gap-6 rounded-xl border py-6 shadow-sm", className)}
+      {...props}
+    />
+  );
+}
+
+function CardHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-header"
+      className={cn(
+        "@container/card-header grid auto-rows-min grid-rows-[auto_auto] items-start gap-2 px-6 has-data-[slot=card-action]:grid-cols-[1fr_auto] [.border-b]:pb-6",
+        className,
+      )}
+      {...props}
+    />
+  );
+}
+
+function CardTitle({ className, ...props }: React.ComponentProps<"div">) {
+  return <div data-slot="card-title" className={cn("leading-none font-semibold", className)} {...props} />;
+}
+
+function CardDescription({ className, ...props }: React.ComponentProps<"div">) {
+  return <div data-slot="card-description" className={cn("text-muted-foreground text-sm", className)} {...props} />;
+}
+
+function CardAction({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-action"
+      className={cn("col-start-2 row-span-2 row-start-1 self-start justify-self-end", className)}
+      {...props}
+    />
+  );
+}
+
+function CardContent({ className, ...props }: React.ComponentProps<"div">) {
+  return <div data-slot="card-content" className={cn("px-6", className)} {...props} />;
+}
+
+function CardFooter({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div data-slot="card-footer" className={cn("flex items-center px-6 [.border-t]:pt-6", className)} {...props} />
+  );
+}
+
+export { Card, CardAction, CardContent, CardDescription, CardFooter, CardHeader, CardTitle };
diff --git a/src/components/ui/input.tsx b/src/components/ui/input.tsx
new file mode 100644
index 0000000..f16c2c0
--- /dev/null
+++ b/src/components/ui/input.tsx
@@ -0,0 +1,21 @@
+import * as React from "react";
+
+import { cn } from "@/lib/utils";
+
+function Input({ className, type, ...props }: React.ComponentProps<"input">) {
+  return (
+    <input
+      type={type}
+      data-slot="input"
+      className={cn(
+        "file:text-foreground placeholder:text-muted-foreground selection:bg-primary selection:text-primary-foreground dark:bg-input/30 border-input h-9 w-full min-w-0 rounded-md border bg-transparent px-3 py-1 text-base shadow-xs transition-[color,box-shadow] outline-none file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:font-medium disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+        "focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px]",
+        "aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
+        className,
+      )}
+      {...props}
+    />
+  );
+}
+
+export { Input };
diff --git a/src/components/ui/label.tsx b/src/components/ui/label.tsx
new file mode 100644
index 0000000..8e82341
--- /dev/null
+++ b/src/components/ui/label.tsx
@@ -0,0 +1,21 @@
+"use client";
+
+import * as LabelPrimitive from "@radix-ui/react-label";
+import * as React from "react";
+
+import { cn } from "@/lib/utils";
+
+function Label({ className, ...props }: React.ComponentProps<typeof LabelPrimitive.Root>) {
+  return (
+    <LabelPrimitive.Root
+      data-slot="label"
+      className={cn(
+        "flex items-center gap-2 text-sm leading-none font-medium select-none group-data-[disabled=true]:pointer-events-none group-data-[disabled=true]:opacity-50 peer-disabled:cursor-not-allowed peer-disabled:opacity-50",
+        className,
+      )}
+      {...props}
+    />
+  );
+}
+
+export { Label };
diff --git a/src/components/ui/select.tsx b/src/components/ui/select.tsx
new file mode 100644
index 0000000..71e2a2c
--- /dev/null
+++ b/src/components/ui/select.tsx
@@ -0,0 +1,162 @@
+"use client";
+
+import * as SelectPrimitive from "@radix-ui/react-select";
+import { CheckIcon, ChevronDownIcon, ChevronUpIcon } from "lucide-react";
+import * as React from "react";
+
+import { cn } from "@/lib/utils";
+
+function Select({ ...props }: React.ComponentProps<typeof SelectPrimitive.Root>) {
+  return <SelectPrimitive.Root data-slot="select" {...props} />;
+}
+
+function SelectGroup({ ...props }: React.ComponentProps<typeof SelectPrimitive.Group>) {
+  return <SelectPrimitive.Group data-slot="select-group" {...props} />;
+}
+
+function SelectValue({ ...props }: React.ComponentProps<typeof SelectPrimitive.Value>) {
+  return <SelectPrimitive.Value data-slot="select-value" {...props} />;
+}
+
+function SelectTrigger({
+  className,
+  size = "default",
+  children,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Trigger> & {
+  size?: "sm" | "default";
+}) {
+  return (
+    <SelectPrimitive.Trigger
+      data-slot="select-trigger"
+      data-size={size}
+      className={cn(
+        "border-input data-[placeholder]:text-muted-foreground [&_svg:not([class*='text-'])]:text-muted-foreground focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:bg-input/30 dark:hover:bg-input/50 flex w-fit items-center justify-between gap-2 rounded-md border bg-transparent px-3 py-2 text-sm whitespace-nowrap shadow-xs transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50 data-[size=default]:h-9 data-[size=sm]:h-8 *:data-[slot=select-value]:line-clamp-1 *:data-[slot=select-value]:flex *:data-[slot=select-value]:items-center *:data-[slot=select-value]:gap-2 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className,
+      )}
+      {...props}
+    >
+      {children}
+      <SelectPrimitive.Icon asChild>
+        <ChevronDownIcon className="size-4 opacity-50" />
+      </SelectPrimitive.Icon>
+    </SelectPrimitive.Trigger>
+  );
+}
+
+function SelectContent({
+  className,
+  children,
+  position = "popper",
+  align = "center",
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.Content>) {
+  return (
+    <SelectPrimitive.Portal>
+      <SelectPrimitive.Content
+        data-slot="select-content"
+        className={cn(
+          "bg-popover text-popover-foreground data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 relative z-50 max-h-(--radix-select-content-available-height) min-w-[8rem] origin-(--radix-select-content-transform-origin) overflow-x-hidden overflow-y-auto rounded-md border shadow-md",
+          position === "popper" &&
+            "data-[side=bottom]:translate-y-1 data-[side=left]:-translate-x-1 data-[side=right]:translate-x-1 data-[side=top]:-translate-y-1",
+          className,
+        )}
+        position={position}
+        align={align}
+        {...props}
+      >
+        <SelectScrollUpButton />
+        <SelectPrimitive.Viewport
+          className={cn(
+            "p-1",
+            position === "popper" &&
+              "h-[var(--radix-select-trigger-height)] w-full min-w-[var(--radix-select-trigger-width)] scroll-my-1",
+          )}
+        >
+          {children}
+        </SelectPrimitive.Viewport>
+        <SelectScrollDownButton />
+      </SelectPrimitive.Content>
+    </SelectPrimitive.Portal>
+  );
+}
+
+function SelectLabel({ className, ...props }: React.ComponentProps<typeof SelectPrimitive.Label>) {
+  return (
+    <SelectPrimitive.Label
+      data-slot="select-label"
+      className={cn("text-muted-foreground px-2 py-1.5 text-xs", className)}
+      {...props}
+    />
+  );
+}
+
+function SelectItem({ className, children, ...props }: React.ComponentProps<typeof SelectPrimitive.Item>) {
+  return (
+    <SelectPrimitive.Item
+      data-slot="select-item"
+      className={cn(
+        "focus:bg-accent focus:text-accent-foreground [&_svg:not([class*='text-'])]:text-muted-foreground relative flex w-full cursor-default items-center gap-2 rounded-sm py-1.5 pr-8 pl-2 text-sm outline-hidden select-none data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4 *:[span]:last:flex *:[span]:last:items-center *:[span]:last:gap-2",
+        className,
+      )}
+      {...props}
+    >
+      <span className="absolute right-2 flex size-3.5 items-center justify-center">
+        <SelectPrimitive.ItemIndicator>
+          <CheckIcon className="size-4" />
+        </SelectPrimitive.ItemIndicator>
+      </span>
+      <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
+    </SelectPrimitive.Item>
+  );
+}
+
+function SelectSeparator({ className, ...props }: React.ComponentProps<typeof SelectPrimitive.Separator>) {
+  return (
+    <SelectPrimitive.Separator
+      data-slot="select-separator"
+      className={cn("bg-border pointer-events-none -mx-1 my-1 h-px", className)}
+      {...props}
+    />
+  );
+}
+
+function SelectScrollUpButton({ className, ...props }: React.ComponentProps<typeof SelectPrimitive.ScrollUpButton>) {
+  return (
+    <SelectPrimitive.ScrollUpButton
+      data-slot="select-scroll-up-button"
+      className={cn("flex cursor-default items-center justify-center py-1", className)}
+      {...props}
+    >
+      <ChevronUpIcon className="size-4" />
+    </SelectPrimitive.ScrollUpButton>
+  );
+}
+
+function SelectScrollDownButton({
+  className,
+  ...props
+}: React.ComponentProps<typeof SelectPrimitive.ScrollDownButton>) {
+  return (
+    <SelectPrimitive.ScrollDownButton
+      data-slot="select-scroll-down-button"
+      className={cn("flex cursor-default items-center justify-center py-1", className)}
+      {...props}
+    >
+      <ChevronDownIcon className="size-4" />
+    </SelectPrimitive.ScrollDownButton>
+  );
+}
+
+export {
+  Select,
+  SelectContent,
+  SelectGroup,
+  SelectItem,
+  SelectLabel,
+  SelectScrollDownButton,
+  SelectScrollUpButton,
+  SelectSeparator,
+  SelectTrigger,
+  SelectValue,
+};
diff --git a/src/components/ui/textarea.tsx b/src/components/ui/textarea.tsx
new file mode 100644
index 0000000..0735a8c
--- /dev/null
+++ b/src/components/ui/textarea.tsx
@@ -0,0 +1,18 @@
+import * as React from "react";
+
+import { cn } from "@/lib/utils";
+
+function Textarea({ className, ...props }: React.ComponentProps<"textarea">) {
+  return (
+    <textarea
+      data-slot="textarea"
+      className={cn(
+        "border-input placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive dark:bg-input/30 flex field-sizing-content min-h-16 w-full rounded-md border bg-transparent px-3 py-2 text-base shadow-xs transition-[color,box-shadow] outline-none focus-visible:ring-[3px] disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+        className,
+      )}
+      {...props}
+    />
+  );
+}
+
+export { Textarea };
diff --git a/src/domain/index.ts b/src/domain/index.ts
new file mode 100644
index 0000000..aec69f2
--- /dev/null
+++ b/src/domain/index.ts
@@ -0,0 +1 @@
+export const DOMAIN_READY = true;
diff --git a/src/domain/smoke.test.ts b/src/domain/smoke.test.ts
new file mode 100644
index 0000000..e34d59b
--- /dev/null
+++ b/src/domain/smoke.test.ts
@@ -0,0 +1,6 @@
+import { test, expect } from "bun:test";
+import { DOMAIN_READY } from "./index.ts";
+
+test("domain layer is importable without a DOM", () => {
+  expect(DOMAIN_READY).toBe(true);
+});
diff --git a/src/frontend.tsx b/src/frontend.tsx
new file mode 100644
index 0000000..cbfcf48
--- /dev/null
+++ b/src/frontend.tsx
@@ -0,0 +1,20 @@
+/**
+ * This file is the entry point for the React app, it sets up the root
+ * element and renders the App component to the DOM.
+ *
+ * It is included in `src/index.html`.
+ */
+
+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import { App } from "./App";
+
+const elem = document.getElementById("root")!;
+const app = (
+  <StrictMode>
+    <App />
+  </StrictMode>
+);
+
+// https://bun.com/docs/bundler/hot-reloading#import-meta-hot-data
+(import.meta.hot.data.root ??= createRoot(elem)).render(app);
diff --git a/src/index.css b/src/index.css
new file mode 100644
index 0000000..3c04ed9
--- /dev/null
+++ b/src/index.css
@@ -0,0 +1,28 @@
+@import "../styles/globals.css";
+
+@layer base {
+  :root {
+    @apply font-sans;
+  }
+
+  body {
+    @apply grid place-items-center min-w-[320px] min-h-screen relative m-0 bg-background text-foreground;
+  }
+}
+
+@keyframes spin {
+  from {
+    transform: rotate(0);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (prefers-reduced-motion) {
+  *,
+  ::before,
+  ::after {
+    animation: none !important;
+  }
+}
diff --git a/src/index.html b/src/index.html
new file mode 100644
index 0000000..e0fc781
--- /dev/null
+++ b/src/index.html
@@ -0,0 +1,12 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Budget 2.0</title>
+    <script type="module" src="./frontend.tsx" async></script>
+  </head>
+  <body>
+    <div id="root"></div>
+  </body>
+</html>
diff --git a/src/index.ts b/src/index.ts
new file mode 100644
index 0000000..7ff027d
--- /dev/null
+++ b/src/index.ts
@@ -0,0 +1,14 @@
+import { serve } from "bun";
+import index from "./index.html";
+
+const server = serve({
+  routes: {
+    "/*": index,
+  },
+  development: process.env.NODE_ENV !== "production" && {
+    hmr: true,
+    console: true,
+  },
+});
+
+console.log(`Dev server running at ${server.url}`);
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
new file mode 100644
index 0000000..365058c
--- /dev/null
+++ b/src/lib/utils.ts
@@ -0,0 +1,6 @@
+import { type ClassValue, clsx } from "clsx";
+import { twMerge } from "tailwind-merge";
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}
diff --git a/styles/globals.css b/styles/globals.css
new file mode 100644
index 0000000..6f499d8
--- /dev/null
+++ b/styles/globals.css
@@ -0,0 +1,120 @@
+@import "tailwindcss";
+@import "tw-animate-css";
+
+@custom-variant dark (&:is(.dark *));
+
+@theme inline {
+  --color-background: var(--background);
+  --color-foreground: var(--foreground);
+  --color-sidebar-ring: var(--sidebar-ring);
+  --color-sidebar-border: var(--sidebar-border);
+  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
+  --color-sidebar-accent: var(--sidebar-accent);
+  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
+  --color-sidebar-primary: var(--sidebar-primary);
+  --color-sidebar-foreground: var(--sidebar-foreground);
+  --color-sidebar: var(--sidebar);
+  --color-chart-5: var(--chart-5);
+  --color-chart-4: var(--chart-4);
+  --color-chart-3: var(--chart-3);
+  --color-chart-2: var(--chart-2);
+  --color-chart-1: var(--chart-1);
+  --color-ring: var(--ring);
+  --color-input: var(--input);
+  --color-border: var(--border);
+  --color-destructive: var(--destructive);
+  --color-accent-foreground: var(--accent-foreground);
+  --color-accent: var(--accent);
+  --color-muted-foreground: var(--muted-foreground);
+  --color-muted: var(--muted);
+  --color-secondary-foreground: var(--secondary-foreground);
+  --color-secondary: var(--secondary);
+  --color-primary-foreground: var(--primary-foreground);
+  --color-primary: var(--primary);
+  --color-popover-foreground: var(--popover-foreground);
+  --color-popover: var(--popover);
+  --color-card-foreground: var(--card-foreground);
+  --color-card: var(--card);
+  --radius-sm: calc(var(--radius) - 4px);
+  --radius-md: calc(var(--radius) - 2px);
+  --radius-lg: var(--radius);
+  --radius-xl: calc(var(--radius) + 4px);
+}
+
+:root {
+  --radius: 0.625rem;
+  --background: oklch(1 0 0);
+  --foreground: oklch(0.145 0 0);
+  --card: oklch(1 0 0);
+  --card-foreground: oklch(0.145 0 0);
+  --popover: oklch(1 0 0);
+  --popover-foreground: oklch(0.145 0 0);
+  --primary: oklch(0.205 0 0);
+  --primary-foreground: oklch(0.985 0 0);
+  --secondary: oklch(0.97 0 0);
+  --secondary-foreground: oklch(0.205 0 0);
+  --muted: oklch(0.97 0 0);
+  --muted-foreground: oklch(0.556 0 0);
+  --accent: oklch(0.97 0 0);
+  --accent-foreground: oklch(0.205 0 0);
+  --destructive: oklch(0.577 0.245 27.325);
+  --border: oklch(0.922 0 0);
+  --input: oklch(0.922 0 0);
+  --ring: oklch(0.708 0 0);
+  --chart-1: oklch(0.646 0.222 41.116);
+  --chart-2: oklch(0.6 0.118 184.704);
+  --chart-3: oklch(0.398 0.07 227.392);
+  --chart-4: oklch(0.828 0.189 84.429);
+  --chart-5: oklch(0.769 0.188 70.08);
+  --sidebar: oklch(0.985 0 0);
+  --sidebar-foreground: oklch(0.145 0 0);
+  --sidebar-primary: oklch(0.205 0 0);
+  --sidebar-primary-foreground: oklch(0.985 0 0);
+  --sidebar-accent: oklch(0.97 0 0);
+  --sidebar-accent-foreground: oklch(0.205 0 0);
+  --sidebar-border: oklch(0.922 0 0);
+  --sidebar-ring: oklch(0.708 0 0);
+}
+
+.dark {
+  --background: oklch(0.145 0 0);
+  --foreground: oklch(0.985 0 0);
+  --card: oklch(0.205 0 0);
+  --card-foreground: oklch(0.985 0 0);
+  --popover: oklch(0.205 0 0);
+  --popover-foreground: oklch(0.985 0 0);
+  --primary: oklch(0.922 0 0);
+  --primary-foreground: oklch(0.205 0 0);
+  --secondary: oklch(0.269 0 0);
+  --secondary-foreground: oklch(0.985 0 0);
+  --muted: oklch(0.269 0 0);
+  --muted-foreground: oklch(0.708 0 0);
+  --accent: oklch(0.269 0 0);
+  --accent-foreground: oklch(0.985 0 0);
+  --destructive: oklch(0.704 0.191 22.216);
+  --border: oklch(1 0 0 / 10%);
+  --input: oklch(1 0 0 / 15%);
+  --ring: oklch(0.556 0 0);
+  --chart-1: oklch(0.488 0.243 264.376);
+  --chart-2: oklch(0.696 0.17 162.48);
+  --chart-3: oklch(0.769 0.188 70.08);
+  --chart-4: oklch(0.627 0.265 303.9);
+  --chart-5: oklch(0.645 0.246 16.439);
+  --sidebar: oklch(0.205 0 0);
+  --sidebar-foreground: oklch(0.985 0 0);
+  --sidebar-primary: oklch(0.488 0.243 264.376);
+  --sidebar-primary-foreground: oklch(0.985 0 0);
+  --sidebar-accent: oklch(0.269 0 0);
+  --sidebar-accent-foreground: oklch(0.985 0 0);
+  --sidebar-border: oklch(1 0 0 / 10%);
+  --sidebar-ring: oklch(0.556 0 0);
+}
+
+@layer base {
+  * {
+    @apply border-border outline-ring/50;
+  }
+  body {
+    @apply bg-background text-foreground;
+  }
+}
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..f4de897
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,36 @@
+{
+  "compilerOptions": {
+    // Environment setup & latest features
+    "lib": ["ESNext", "DOM"],
+    "target": "ESNext",
+    "module": "Preserve",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+    "types": ["bun", "react"],
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+
+    "paths": {
+      "@/*": ["./src/*"]
+    },
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  },
+
+  "exclude": ["dist", "node_modules"]
+}