diff --git a/.tangled/workflows/e2e.yml b/.tangled/workflows/e2e.yml
index 4afbe4f..2d1d861 100644
--- a/.tangled/workflows/e2e.yml
+++ b/.tangled/workflows/e2e.yml
@@ -2,8 +2,10 @@
 # shadix_docs release (NOT mix dev), boots it, and runs the Playwright suite
 # (axe + regression) against it. Browser recipe confirmed by the a11y-ci-spike.
 when:
+  # NOTE: worktree-a11y-axe-ci is the in-development branch — remove it from this
+  # list before merging so the gate runs only on main + PRs.
   - event: ["push"]
-    branch: ["main"]
+    branch: ["main", "worktree-a11y-axe-ci"]
   - event: ["pull_request"]
     branch: ["main"]
 
@@ -19,10 +21,10 @@ dependencies:
     - chromium
     - fontconfig
     - dejavu_fonts
-    # Nix-built tailwind/esbuild — the mix-managed downloads are glibc binaries
-    # that can't find the FHS loader on a minimal Nix image. config/config.exs
-    # points mix at these via TAILWIND_BIN/ESBUILD_BIN (set below).
-    - tailwindcss
+    # Nix-built esbuild (static Go binary, runs fine on Nix). Tailwind is handled
+    # via the @tailwindcss/cli npm package in the build step instead: the nixpkgs
+    # tailwindcss can't resolve `@import "tailwindcss"`, and the mix-managed
+    # standalone is a glibc binary that can't exec on a minimal Nix image.
     - esbuild
 
 environment:
@@ -51,9 +53,12 @@ steps:
       mix local.hex --force && mix local.rebar --force
       mix deps.get --only docs
       (cd assets && npm install --no-audit --no-fund)
-      # Use the Nix-built tailwind/esbuild (runnable on this image) instead of the
-      # mix-managed glibc downloads (which can't exec on minimal Nix).
-      export TAILWIND_BIN="$(command -v tailwindcss)"
+      # Tailwind v4 via the official @tailwindcss/cli (Node — runs on Nix and
+      # resolves `@import "tailwindcss"` from node_modules). Installed --no-save
+      # so the repo's package.json (which targets the mix-managed standalone for
+      # local dev) is untouched. Pinned to the config/config.exs version.
+      (cd assets && npm install --no-save --no-audit --no-fund @tailwindcss/cli@4.1.13)
+      export TAILWIND_BIN="$PWD/assets/node_modules/.bin/tailwindcss"
       export ESBUILD_BIN="$(command -v esbuild)"
       echo "TAILWIND_BIN=$TAILWIND_BIN  ESBUILD_BIN=$ESBUILD_BIN"
       mix assets.build