diff --git a/services/content/seed_demo_content.sql b/services/content/seed_demo_content.sql
new file mode 100644
index 0000000..aa14a5c
--- /dev/null
+++ b/services/content/seed_demo_content.sql
@@ -0,0 +1,43 @@
+-- Demo content seed for the FlatRender V2 content service.
+-- Idempotent: deterministic UUIDs + ON CONFLICT DO NOTHING, safe to re-run.
+-- Run: docker exec -i fr2-postgres psql -U postgres -d flatrender -f - < seed_demo_content.sql
+--   (or pipe this file's contents to psql).
+--
+-- Seeds a small category tree and 8 published template containers so the
+-- public site (/, /templates) shows real data through the gateway /v1/* routes.
+
+SET search_path TO content, public;
+
+-- ── Categories ────────────────────────────────────────────────────────────────
+INSERT INTO content.categories (id, name, slug, description, sort, is_active) VALUES
+  ('c1000000-0000-4000-8000-000000000001', 'Intro & Logo',  'intro-logo',   'Logo stings and animated intros',        1, true),
+  ('c1000000-0000-4000-8000-000000000002', 'Social Media',  'social-media', 'Stories, reels and posts',               2, true),
+  ('c1000000-0000-4000-8000-000000000003', 'Business',      'business',     'Corporate, promo and presentations',     3, true),
+  ('c1000000-0000-4000-8000-000000000004', 'Marketing',     'marketing',    'Product ads and promotional videos',     4, true)
+ON CONFLICT (slug) DO NOTHING;
+
+-- ── Template containers (published) ─────────────────────────────────────────────
+-- primary_mode uses the content.choose_mode enum: FIX | FLEXIBLE | MockUp | MusicVisualizer | VoiceOver
+INSERT INTO content.project_containers
+  (id, slug, name, description, image, is_published, is_premium, primary_mode, sort, sort_date) VALUES
+  ('a2000000-0000-4000-8000-000000000001', 'minimal-logo-reveal',  'Minimal Logo Reveal',  'Clean, elegant logo animation for any brand.',        'https://picsum.photos/seed/frlogo/640/360',   true, false, 'FLEXIBLE', 1, now()),
+  ('a2000000-0000-4000-8000-000000000002', 'glitch-intro',         'Glitch Intro',         'Energetic glitch-style opener for tech content.',     'https://picsum.photos/seed/frglitch/640/360', true, true,  'FLEXIBLE', 2, now()),
+  ('a2000000-0000-4000-8000-000000000003', 'instagram-story-pack', 'Instagram Story Pack', 'Vertical story templates ready for social.',          'https://picsum.photos/seed/frstory/640/360',  true, false, 'FLEXIBLE', 3, now()),
+  ('a2000000-0000-4000-8000-000000000004', 'reels-promo',          'Reels Promo',          'Punchy vertical promo for reels and shorts.',         'https://picsum.photos/seed/frreels/640/360',  true, false, 'FLEXIBLE', 4, now()),
+  ('a2000000-0000-4000-8000-000000000005', 'corporate-slideshow',  'Corporate Slideshow',  'Professional slideshow for company presentations.',   'https://picsum.photos/seed/frcorp/640/360',   true, false, 'FLEXIBLE', 5, now()),
+  ('a2000000-0000-4000-8000-000000000006', 'startup-pitch',        'Startup Pitch',        'Modern pitch-deck style animated presentation.',      'https://picsum.photos/seed/frpitch/640/360',  true, true,  'FLEXIBLE', 6, now()),
+  ('a2000000-0000-4000-8000-000000000007', 'product-showcase',     'Product Showcase',     'Highlight product features with smooth motion.',      'https://picsum.photos/seed/frprod/640/360',   true, false, 'FLEXIBLE', 7, now()),
+  ('a2000000-0000-4000-8000-000000000008', 'sale-countdown',       'Sale Countdown',       'Eye-catching promo with an animated countdown.',      'https://picsum.photos/seed/frsale/640/360',   true, false, 'FLEXIBLE', 8, now())
+ON CONFLICT (slug) DO NOTHING;
+
+-- ── Container ↔ category links ──────────────────────────────────────────────────
+INSERT INTO content.container_categories (container_id, category_id, sort) VALUES
+  ('a2000000-0000-4000-8000-000000000001', 'c1000000-0000-4000-8000-000000000001', 0),  -- Logo Reveal     → Intro & Logo
+  ('a2000000-0000-4000-8000-000000000002', 'c1000000-0000-4000-8000-000000000001', 0),  -- Glitch Intro    → Intro & Logo
+  ('a2000000-0000-4000-8000-000000000003', 'c1000000-0000-4000-8000-000000000002', 0),  -- Story Pack      → Social Media
+  ('a2000000-0000-4000-8000-000000000004', 'c1000000-0000-4000-8000-000000000002', 0),  -- Reels Promo     → Social Media
+  ('a2000000-0000-4000-8000-000000000005', 'c1000000-0000-4000-8000-000000000003', 0),  -- Corporate       → Business
+  ('a2000000-0000-4000-8000-000000000006', 'c1000000-0000-4000-8000-000000000003', 0),  -- Startup Pitch   → Business
+  ('a2000000-0000-4000-8000-000000000007', 'c1000000-0000-4000-8000-000000000004', 0),  -- Product Showcase→ Marketing
+  ('a2000000-0000-4000-8000-000000000008', 'c1000000-0000-4000-8000-000000000004', 0)   -- Sale Countdown  → Marketing
+ON CONFLICT (container_id, category_id) DO NOTHING;