diff --git a/openspec/specs/architecture.md b/openspec/specs/architecture.md
index 677e3b3..e6f20ae 100644
--- a/openspec/specs/architecture.md
+++ b/openspec/specs/architecture.md
@@ -34,10 +34,16 @@ Implementation notes
 Decisions
 - <record cross‑cutting decisions here>
 
+Client platform decisions
+
 Client platform decisions
 - Mobile: React Native + Expo (TypeScript).
   Rationale: strong a11y ecosystem, mature tooling, and DX.
   Notes: Expo modules; E2E via Detox; push via Expo/FCM/APNs.
+- Web: Next.js (SSR).
+  Rationale: semantic HTML, SEO, CWV, and ecosystem maturity.
+  Notes: App Router, server actions; sitemap, RSS for blog/resources.
 
 Decisions
 - 2025-11-17 — Mobile stack: React Native + Expo.
+- 2025-11-17 — Web stack: Next.js (SSR).