diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index 19288a7..7e5ed9d 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -10,9 +10,32 @@ permissions:
   id-token: write
 
 jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      
+      - name: Validate files
+        run: |
+          echo "Validating CV website files..."
+          if [ ! -f "index.html" ]; then
+            echo "Error: index.html not found!"
+            exit 1
+          fi
+          echo "✓ index.html found"
+          if [ ! -f "print.css" ]; then
+            echo "Warning: print.css not found"
+          else
+            echo "✓ print.css found"
+          fi
+          echo "✓ Build validation complete"
+  
   deploy:
+    needs: build
     environment:
       name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
diff --git a/.github/workflows/sync-to-gitlab.yml b/.github/workflows/sync-to-gitlab.yml
new file mode 100644
index 0000000..bca5033
--- /dev/null
+++ b/.github/workflows/sync-to-gitlab.yml
@@ -0,0 +1,42 @@
+name: Sync to GitLab
+
+on:
+  push:
+    branches:
+      - main
+      - style-updates
+      - deployment-development
+    tags:
+      - '*'
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Fetch all history for proper syncing
+
+      - name: Configure Git
+        run: |
+          git config user.name "GitHub Actions"
+          git config user.email "actions@github.com"
+
+      - name: Add GitLab remote
+        run: |
+          git remote add gitlab git@hill-st.nohost.me:pwflint/CV.git || true
+          git remote set-url gitlab git@hill-st.nohost.me:pwflint/CV.git
+
+      - name: Setup SSH
+        uses: webfactory/ssh-agent@v0.9.0
+        with:
+          ssh-private-key: ${{ secrets.GITLAB_SSH_PRIVATE_KEY }}
+
+      - name: Push to GitLab
+        run: |
+          git push gitlab ${GITHUB_REF#refs/heads/} || true
+          # If pushing main, also try to update other branches if they exist
+          if [ "${GITHUB_REF#refs/heads/}" = "main" ]; then
+            git push gitlab main || true
+          fi
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9781ea1..3efda81 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,9 +1,99 @@
+# GitLab CI/CD Pipeline for CV Website Deployment
+# NOTE: This repository uses GitHub Pages for deployment via GitHub Actions
+# This GitLab CI/CD configuration is provided as an alternative option
+# if you want to deploy to GitLab Pages instead
+#
+# Primary deployment: GitHub Pages (see .github/workflows/pages.yml)
+# Alternative deployment: GitLab Pages (this file)
+
+stages:
+  - build
+  - deploy
+  - sync
+
+variables:
+  DEPLOY_BRANCH: "main"
+  PUBLIC_DIR: "."
+
+# Build stage - validate HTML/CSS if needed
+build:
+  stage: build
+  image: node:18-alpine
+  script:
+    - echo "Building CV website..."
+    - |
+      if [ ! -f "index.html" ]; then
+        echo "Error: index.html not found!"
+        exit 1
+      fi
+      echo "✓ index.html found"
+      if [ ! -f "print.css" ]; then
+        echo "Warning: print.css not found"
+      else
+        echo "✓ print.css found"
+      fi
+      echo "✓ Build validation complete"
+  artifacts:
+    paths:
+      - index.html
+      - print.css
+      - "*.JPG"
+      - "*.jpg"
+      - "*.png"
+    expire_in: 1 hour
+  only:
+    - main
+    - master
+    - merge_requests
+
+# Deploy to GitLab Pages
 pages:
   stage: deploy
+  image: alpine:latest
   script:
-    - cp -r * .public
+    - echo "Deploying to GitLab Pages..."
+    - |
+      # Copy all necessary files to public directory
+      mkdir -p public
+      cp -r index.html print.css public/ 2>/dev/null || true
+      # Copy images
+      cp -r *.JPG *.jpg *.png public/ 2>/dev/null || true
+      # Copy any other assets
+      if [ -d "assets" ]; then
+        cp -r assets public/ 2>/dev/null || true
+      fi
+    - echo "✓ Files copied to public directory"
+    - echo "Deployment complete! Site will be available at:"
+    - echo "https://$CI_PROJECT_NAMESPACE.gitlab.io/$CI_PROJECT_NAME"
   artifacts:
     paths:
       - public
-  rules:
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
\ No newline at end of file
+  only:
+    - main
+    - master
+
+# Sync to GitHub (for when GitLab becomes primary)
+# This job will push changes to GitHub after successful deployment
+# To enable: Uncomment and configure GITHUB_SSH_PRIVATE_KEY in GitLab CI/CD variables
+# sync_to_github:
+#   stage: sync
+#   image: alpine:latest
+#   before_script:
+#     - apk add --no-cache git openssh-client
+#     - mkdir -p ~/.ssh
+#     - echo "$GITHUB_SSH_PRIVATE_KEY" | tr -d '\r' > ~/.ssh/id_rsa
+#     - chmod 600 ~/.ssh/id_rsa
+#     - ssh-keyscan github.com >> ~/.ssh/known_hosts
+#     - eval $(ssh-agent -s)
+#     - ssh-add ~/.ssh/id_rsa
+#   script:
+#     - git config user.name "GitLab CI"
+#     - git config user.email "gitlab-ci@noreply.gitlab.com"
+#     - git remote add github git@github.com:pwflint/CV.git || true
+#     - git remote set-url github git@github.com:pwflint/CV.git
+#     - git push github ${CI_COMMIT_REF_NAME} || echo "Push to GitHub failed (non-critical)"
+#   only:
+#     - main
+#     - master
+#   when: on_success
+#   allow_failure: true
diff --git a/DEPLOYMENT_MIGRATION_PLAN.md b/DEPLOYMENT_MIGRATION_PLAN.md
new file mode 100644
index 0000000..e2f7dbb
--- /dev/null
+++ b/DEPLOYMENT_MIGRATION_PLAN.md
@@ -0,0 +1,138 @@
+# Deployment Migration Plan: GitHub → GitLab
+
+## Current State
+
+### Primary Repository: GitHub (origin)
+- **Deployment**: GitHub Pages via GitHub Actions
+- **Workflow**: `.github/workflows/pages.yml`
+- **Sync**: Manual push to GitLab (hill-st) when needed
+- **Auto-sync**: `.github/workflows/sync-to-gitlab.yml` (to be configured)
+
+### Secondary Repository: GitLab (hill-st)
+- **Deployment**: GitLab Pages (configured but not primary)
+- **Workflow**: `.gitlab-ci.yml` (alternative deployment option)
+- **Status**: Protected main branch, receives syncs from GitHub
+
+## Migration Goal
+
+Switch primary deployment to GitLab Pages, making:
+- **GitLab (hill-st)** → Primary repository and deployment
+- **GitHub (origin)** → Backup/sync repository
+
+## Steps Required
+
+### 1. Update GitLab CI/CD Configuration
+- [ ] Review and finalize `.gitlab-ci.yml` for GitLab Pages deployment
+- [ ] Ensure build and deploy stages are properly configured
+- [ ] Test GitLab Pages deployment on a feature branch
+- [ ] Verify all assets (images, CSS, JS) deploy correctly
+
+### 2. Update Remote Configuration
+- [ ] Change local git remotes:
+  ```bash
+  git remote rename origin github-backup
+  git remote rename hill-st origin
+  ```
+- [ ] Update branch tracking to point to new origin (GitLab)
+- [ ] Verify remote configuration: `git remote -v`
+
+### 3. Reverse Sync Workflow
+- [ ] Create new workflow: `.gitlab-ci.yml` sync job (or separate pipeline)
+- [ ] Set up GitLab CI/CD to push to GitHub on successful deployments
+- [ ] Configure GitHub personal access token or deploy key as GitLab CI/CD variable
+- [ ] Test sync from GitLab → GitHub
+
+### 4. Update Documentation
+- [ ] Update `README.md` to reflect GitLab as primary deployment
+- [ ] Update deployment instructions
+- [ ] Document new workflow (GitLab → GitHub sync)
+- [ ] Update any references to GitHub Pages
+
+### 5. GitHub Actions Cleanup
+- [ ] Remove or disable `.github/workflows/sync-to-gitlab.yml` (no longer needed)
+- [ ] Keep `.github/workflows/pages.yml` for reference or remove if not needed
+- [ ] Consider archiving GitHub Pages deployment workflow
+
+### 6. GitLab Pages Configuration
+- [ ] Enable GitLab Pages in repository settings
+- [ ] Configure custom domain (if applicable)
+- [ ] Set up SSL/TLS certificate
+- [ ] Test deployment and verify site is accessible
+
+### 7. Migration Execution
+- [ ] Push current main branch to GitLab (if not already synced)
+- [ ] Merge any pending PRs on GitHub first
+- [ ] Create final sync from GitHub → GitLab
+- [ ] Switch remotes locally
+- [ ] Update any CI/CD variables or secrets
+- [ ] Deploy to GitLab Pages
+- [ ] Verify deployment works correctly
+
+### 8. Post-Migration
+- [ ] Update GitHub repository description/README to indicate it's a mirror
+- [ ] Test the reverse sync (GitLab → GitHub)
+- [ ] Monitor first few deployments to ensure sync works
+- [ ] Update any external links/bookmarks to point to GitLab Pages URL
+
+## GitLab CI/CD Sync Configuration
+
+### Option A: Add sync job to existing `.gitlab-ci.yml`
+```yaml
+sync_to_github:
+  stage: deploy
+  image: alpine:latest
+  before_script:
+    - apk add --no-cache git openssh-client
+    - mkdir -p ~/.ssh
+    - echo "$GITHUB_SSH_PRIVATE_KEY" | tr -d '\r' > ~/.ssh/id_rsa
+    - chmod 600 ~/.ssh/id_rsa
+    - ssh-keyscan github.com >> ~/.ssh/known_hosts
+  script:
+    - git remote add github git@github.com:pwflint/CV.git || true
+    - git push github ${CI_COMMIT_REF_NAME} || true
+  only:
+    - main
+  when: on_success
+```
+
+### Option B: Separate sync pipeline
+- Create dedicated sync job that runs after successful Pages deployment
+- Use GitLab CI/CD variables for GitHub credentials
+- Configure to run only on main branch deployments
+
+## Considerations
+
+### Branch Protection
+- GitLab main branch is protected (cannot force push)
+- Will need to use merge requests for all changes
+- GitHub can remain less restricted as backup
+
+### Deployment URLs
+- Update any hardcoded URLs or references
+- GitLab Pages URL format: `https://[namespace].gitlab.io/[project-name]`
+- Or custom domain if configured
+
+### Secrets Management
+- Move GitHub-related secrets to GitLab CI/CD variables
+- Set up GitHub personal access token or deploy key
+- Store securely in GitLab's variable management
+
+### Rollback Plan
+- Keep GitHub Actions workflow files for quick rollback if needed
+- Document how to switch back if issues arise
+- Maintain ability to deploy from either platform during transition
+
+## Timeline Recommendation
+
+1. **Phase 1**: Set up and test GitLab Pages deployment (1-2 days)
+2. **Phase 2**: Configure reverse sync workflow (1 day)
+3. **Phase 3**: Update remotes and documentation (1 day)
+4. **Phase 4**: Execute migration and verify (1 day)
+5. **Phase 5**: Monitor and adjust (ongoing)
+
+## Notes
+
+- LICENSE file: Currently only on GitLab, should be added to GitHub during migration
+- Current workflow files can be kept for reference
+- Consider keeping both deployment methods active during transition period
+- Test thoroughly before making GitLab the primary
diff --git a/README.md b/README.md
index e36754e..f637f2d 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,12 @@ A static website version of my curriculum vitae, built with HTML and CSS.
 - [x] Added contact icons in header
 - [x] Added KALEIOPE website link in footer
 - [x] Removed unnecessary Jekyll dependencies
+- [x] Added dark mode support with persistent theme preference
+- [x] Optimized image loading with lazy loading
+- [x] Added print stylesheet for professional PDF export
+- [x] Added PDF export functionality
+- [x] Implemented GitHub Actions workflow for GitHub Pages deployment
+- [x] Added privacy-friendly analytics tracking
 
 ### Current Features
 - Clean, modern design
@@ -26,21 +32,65 @@ A static website version of my curriculum vitae, built with HTML and CSS.
 - Easy navigation
 - Contact information readily available
 - Professional typography
+- **Dark mode** with system preference detection and manual toggle
+- **Optimized images** with lazy loading for faster page performance
+- **Print-optimized** stylesheet for professional PDF generation
+- **One-click PDF export** using browser's native print functionality
+- **Privacy-friendly analytics** tracking page views and interactions
 
 ### Technical Details
 - Built with vanilla HTML and CSS
 - Uses Font Awesome for icons
 - Google Fonts for typography
-- No JavaScript dependencies
+- Minimal JavaScript for enhanced functionality (dark mode, PDF export, analytics)
 - Mobile-first design
 - WCAG 2.1 AA compliant
+- Lazy loading images for performance
+- Print stylesheet for professional output
+- GitHub Actions workflow for automated deployment to GitHub Pages
 
 ## Deployment
-This site is deployed using GitHub Pages. The main file is `index.html`.
 
-## Future Improvements
-- [ ] Add dark mode support
-- [ ] Optimize image loading
-- [ ] Add print stylesheet
-- [ ] Add a PDF export option
+This site is deployed using **GitHub Pages** via GitHub Actions workflow. The deployment is automated through `.github/workflows/pages.yml`.
+
+### Deployment Process
+1. Push changes to the `main` branch
+2. GitHub Actions automatically validates and builds the site
+3. Site is deployed to GitHub Pages
+4. Site is available at: `https://[username].github.io/[repository-name]` or your custom domain
+
+### Deployment Configuration
+- **Primary**: GitHub Pages (automated via GitHub Actions)
+- **Alternative**: GitLab Pages configuration available in `.gitlab-ci.yml` if needed
+- **Manual**: Files can be deployed directly to any static hosting service
+
+### GitHub Pages Setup
+1. Enable GitHub Pages in repository settings
+2. Select source: "GitHub Actions" (not "Deploy from a branch")
+3. The workflow will automatically deploy on pushes to `main`
+
+### Manual Deployment
+If you need to deploy manually or to a different server:
+- Use the files directly (they're static HTML/CSS/JS)
+- Upload to any static hosting service (Netlify, Vercel, etc.)
+- Configure the GitLab CI/CD pipeline for GitLab Pages (see `.gitlab-ci.yml`)
+
+## Configuration
+
+### Analytics
+The analytics script (`analytics.js`) is included but requires configuration:
+1. Update `ANALYTICS_ENDPOINT` in `analytics.js` with your analytics service endpoint
+2. Set `ENABLE_ANALYTICS` to `true` to enable tracking, or `false` to disable
+
+The analytics script is privacy-friendly:
+- No cookies used
+- No personal data collected
+- Session IDs are memory-only (not persisted)
+- Respects user privacy
+
+### Dark Mode
+Dark mode preference is stored in `localStorage` and persists across sessions. Users can toggle between light and dark themes using the moon/sun icon in the header.
+
+### PDF Export
+Click the "Export as PDF" button to generate a PDF version of the CV. The print stylesheet ensures professional formatting when printing or saving as PDF.