diff --git a/nginx-security-headers.conf b/nginx-security-headers.conf
index 73c1c53..182a335 100644
--- a/nginx-security-headers.conf
+++ b/nginx-security-headers.conf
@@ -8,5 +8,8 @@ add_header X-Content-Type-Options "nosniff" always;
 add_header X-Frame-Options "SAMEORIGIN" always;
 add_header Referrer-Policy "strict-origin-when-cross-origin" always;
 add_header Permissions-Policy "geolocation=(), microphone=(), camera=(), payment=()" always;
-# CSP: inline CSS + JS are allowed (project convention), fonts from Google.
-add_header Content-Security-Policy "default-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; script-src 'self' 'unsafe-inline'; img-src 'self' data:; base-uri 'self'; form-action 'self'; frame-ancestors 'self'" always;
+# CSP: inline CSS allowed (style attributes in the CV + single-file convention);
+# the inline script is HASH-pinned (no script unsafe-inline). INVARIANT: after
+# ANY edit to index.html's inline <script>, recompute the hash (command in
+# CLAUDE.md) and update it here — a stale hash silently disables the JS.
+add_header Content-Security-Policy "default-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; script-src 'self' 'sha256-Al1M34KxI6Ye5Viu6aO//7CYyaLzqtpG9GX95FFlSOY='; img-src 'self' data:; base-uri 'self'; form-action 'self'; frame-ancestors 'self'" always;