diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..575913e
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,30 @@
+name: Build and audit
+
+on:
+  pull_request:
+    branches: main
+
+jobs:
+  build-and-audit:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [22.x, 24.x, 26.x]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build website
+        run: npm run build
+
+      - name: Run security audit
+        run: npm audit --production --audit-level=moderate