diff --git a/Dockerfile b/Dockerfile
index 8123798..902a789 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,5 +7,6 @@ RUN npm run build
 
 FROM nginx:alpine AS runtime
 COPY --from=build /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
 EXPOSE 80
 CMD ["nginx", "-g", "daemon off;"]
diff --git a/docs/PRODUCTION_SYNC_REPORT.md b/docs/PRODUCTION_SYNC_REPORT.md
new file mode 100644
index 0000000..2b949ab
--- /dev/null
+++ b/docs/PRODUCTION_SYNC_REPORT.md
@@ -0,0 +1,181 @@
+# Production Sync Report
+
+**Date:** 2026-07-09  
+**Status:** Resolved
+
+---
+
+## Root Cause
+
+### Почему production не менялся:
+
+1. **Docker контейнер не пересобран**
+   - Контейнер `owl-web-1` был создан **4 дня назад** и не обновлялся
+   - Все коммиты с MainPage, DetailsPage, routing были сделаны, но docker не пересобирался
+
+2. **Nginx не настроен для SPA routing**
+   - `/details` возвращал 404 потому что nginx искал физический файл
+   - Для BrowserRouter нужен fallback на `index.html`
+
+---
+
+## What Was Fixed
+
+### 1. Docker rebuild
+
+```bash
+docker compose -p owl -f docker-compose.server.yml up -d --build
+```
+
+### 2. Nginx SPA configuration
+
+Создан файл `nginx.conf`:
+
+```nginx
+server {
+    listen 80;
+    server_name localhost;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    location /assets/ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}
+```
+
+### 3. Dockerfile update
+
+```dockerfile
+FROM nginx:alpine AS runtime
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf  # Added
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]
+```
+
+---
+
+## Files Changed
+
+| File | Change |
+|------|--------|
+| `nginx.conf` | Created (SPA fallback) |
+| `Dockerfile` | Added nginx.conf copy |
+| `scripts/test_production.py` | Created (browser QA) |
+
+---
+
+## Production Verification
+
+### curl results
+
+```
+https://arhipovdan.ru/        → 200 OK
+https://arhipovdan.ru/details → 200 OK
+```
+
+### Browser QA (production)
+
+| Check | Result |
+|-------|--------|
+| Play button | ✓ |
+| Details link | ✓ |
+| HUD present | ✓ |
+| Progress dots | 8 ✓ |
+| HeroSection absent on / | ✓ |
+| ProductDemo absent on / | ✓ |
+| Header on /details | ✓ |
+| HeroSection on /details | ✓ |
+| No console errors | ✓ |
+
+---
+
+## Screenshots
+
+```
+docs/production_sync_screenshots/
+├── prod_home_after_deploy.png
+└── prod_details_after_deploy.png
+```
+
+### Main page (/)
+
+![Home](production_sync_screenshots/prod_home_after_deploy.png)
+
+- Full-screen 3D demo
+- HUD: Item, Status, Category, Command, Speed, Case 1/8
+- Play Demo button
+- Details → link
+- 8 progress dots
+
+### Details page (/details)
+
+![Details](production_sync_screenshots/prod_details_after_deploy.png)
+
+- Back to Full-Screen Demo link
+- Header with navigation
+- HeroSection
+- Detection/Classification/Command/Routing stepper
+- Buttons: Запустить демо, Показать сценарии, Инженерный режим
+
+---
+
+## Build/Test Results
+
+```
+✓ npm run build — success
+✓ npm run test — 59 tests passed
+✓ docker rebuild — success
+✓ curl / — 200
+✓ curl /details — 200
+✓ Browser QA — all checks passed
+```
+
+---
+
+## Remaining Risks
+
+1. **Browser cache** — Users may need to hard-refresh (Ctrl+Shift+R)
+2. **CDN cache** — If using CDN, may need purge
+
+---
+
+## Commands for Commit/Push
+
+```bash
+cd /opt/arhipovdan/app
+
+git add \
+  nginx.conf \
+  Dockerfile \
+  scripts/test_production.py \
+  docs/PRODUCTION_SYNC_REPORT.md \
+  docs/production_sync_screenshots/
+
+git commit -m "$(cat <<'EOF'
+fix: add nginx SPA fallback for BrowserRouter routing
+
+Root cause: Docker container was 4 days old and nginx had no
+try_files fallback for SPA routes like /details.
+
+Changes:
+- Add nginx.conf with try_files $uri $uri/ /index.html
+- Update Dockerfile to copy nginx config
+- Add production browser QA script
+
+Production verified:
+- https://arhipovdan.ru/ shows full-screen 3D demo
+- https://arhipovdan.ru/details shows detailed page
+EOF
+)"
+
+git push origin dan_branch
+```
+
+**DO NOT RUN** — commit/push not requested.
diff --git a/docs/production_sync_screenshots/prod_details_after_deploy.png b/docs/production_sync_screenshots/prod_details_after_deploy.png
new file mode 100644
index 0000000..88fe386
Binary files /dev/null and b/docs/production_sync_screenshots/prod_details_after_deploy.png differ
diff --git a/docs/production_sync_screenshots/prod_home_after_deploy.png b/docs/production_sync_screenshots/prod_home_after_deploy.png
new file mode 100644
index 0000000..4eec33a
Binary files /dev/null and b/docs/production_sync_screenshots/prod_home_after_deploy.png differ
diff --git a/nginx.conf b/nginx.conf
new file mode 100644
index 0000000..165d6e0
--- /dev/null
+++ b/nginx.conf
@@ -0,0 +1,20 @@
+server {
+    listen 80;
+    server_name localhost;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    location /assets/ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    location /models/ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}
diff --git a/scripts/test_production.py b/scripts/test_production.py
new file mode 100644
index 0000000..fddcb0f
--- /dev/null
+++ b/scripts/test_production.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+"""Test production site and take screenshots."""
+
+from playwright.sync_api import sync_playwright
+import os
+import time
+
+SCREENSHOTS_DIR = '/opt/arhipovdan/app/docs/production_sync_screenshots'
+PROD_URL = 'https://arhipovdan.ru'
+
+def main():
+    os.makedirs(SCREENSHOTS_DIR, exist_ok=True)
+    
+    with sync_playwright() as p:
+        browser = p.chromium.launch(headless=True)
+        page = browser.new_page(viewport={'width': 1920, 'height': 1080})
+        
+        console_errors = []
+        page.on('console', lambda msg: console_errors.append(msg.text) if msg.type == 'error' else None)
+        
+        print(f"1. Navigating to {PROD_URL}/")
+        page.goto(f'{PROD_URL}/')
+        page.wait_for_load_state('networkidle')
+        time.sleep(3)  # Wait for 3D to render
+        
+        print("2. Taking prod_home_after_deploy screenshot...")
+        page.screenshot(path=f'{SCREENSHOTS_DIR}/prod_home_after_deploy.png')
+        
+        # Check for key elements
+        play_button = page.locator('button.play-button')
+        details_link = page.locator('.details-link')
+        hud = page.locator('.main-hud')
+        progress_dots = page.locator('.progress-dot')
+        
+        print("\nHome page verification:")
+        print(f"  Play button: {'✓' if play_button.count() > 0 else '✗'}")
+        print(f"  Details link: {'✓' if details_link.count() > 0 else '✗'}")
+        print(f"  HUD present: {'✓' if hud.count() > 0 else '✗'}")
+        print(f"  Progress dots: {progress_dots.count()} (expected 8)")
+        
+        # Check for OLD elements that should NOT be on main page
+        hero_section = page.locator('.hero-section')
+        product_demo = page.locator('.product-demo')
+        
+        print(f"  HeroSection absent: {'✓' if hero_section.count() == 0 else '✗ (should not be here)'}")
+        print(f"  ProductDemo absent: {'✓' if product_demo.count() == 0 else '✗ (should not be here)'}")
+        
+        print(f"\n3. Navigating to {PROD_URL}/details")
+        page.goto(f'{PROD_URL}/details')
+        page.wait_for_load_state('networkidle')
+        time.sleep(2)
+        
+        print("4. Taking prod_details_after_deploy screenshot...")
+        page.screenshot(path=f'{SCREENSHOTS_DIR}/prod_details_after_deploy.png')
+        
+        # Check for details page elements
+        header = page.locator('header')
+        hero_section = page.locator('.hero-section')
+        product_demo = page.locator('.product-demo')
+        
+        print("\nDetails page verification:")
+        print(f"  Header: {'✓' if header.count() > 0 else '✗'}")
+        print(f"  HeroSection: {'✓' if hero_section.count() > 0 else '✗'}")
+        print(f"  ProductDemo: {'✓' if product_demo.count() > 0 else '✗'}")
+        
+        if len(console_errors) == 0:
+            print("\n✓ No console errors")
+        else:
+            print(f"\n✗ Console errors: {len(console_errors)}")
+            for err in console_errors[:5]:
+                print(f"  - {err[:100]}")
+        
+        print(f"\nScreenshots saved to {SCREENSHOTS_DIR}/")
+        
+        browser.close()
+        print("\nDone!")
+
+if __name__ == '__main__':
+    main()