diff --git a/.gitea/workflows/publish.yml b/.gitea/workflows/publish.yml
index 199d962..be7ab56 100644
--- a/.gitea/workflows/publish.yml
+++ b/.gitea/workflows/publish.yml
@@ -68,11 +68,14 @@ jobs:
           stage=$(mktemp -d)
           cp "$CARGO_TARGET_DIR/release/portal" "$stage/portal"
           cp "$CARGO_TARGET_DIR/release/question_lint" "$stage/question_lint"
+          # hash-files = true: leptos resolves hash.txt next to the running
+          # binary, so it ships beside portal in the release dir.
+          cp "$CARGO_TARGET_DIR/release/hash.txt" "$stage/hash.txt"
           # site-root ("target/site" in Cargo.toml) is project-relative,
           # not affected by CARGO_TARGET_DIR - only the plain `cargo build`
           # outputs (release/, front/) move with that override.
           cp -r target/site "$stage/site"
-          tar -C "$stage" -czf "portal-$tag.tar.gz" portal question_lint site
+          tar -C "$stage" -czf "portal-$tag.tar.gz" portal question_lint hash.txt site
           rm -rf "$stage"
 
       # The run's own ephemeral token has write access to this repo -
diff --git a/Cargo.toml b/Cargo.toml
index f54c9c2..8f02864 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -131,6 +131,12 @@ bin-default-features = false
 lib-features = ["hydrate"]
 lib-default-features = false
 lib-profile-release = "wasm-release"
+# Content-hashed pkg names (portal.<hash>.js/wasm/css) + hash.txt: a
+# freshly served page can never reference a stale cached bundle - an
+# iPhone kept a heuristically-cached portal.js across three releases
+# and paired it with new wasm, silently killing hydration. Runtime
+# needs LEPTOS_HASH_FILES=true (set in each content repo's deploy env).
+hash-files = true
 
 # cargo release <level> is how a portal version is cut: bump, commit,
 # tag v{{version}}, push. CI (publish.yml) reacts to the tag and
diff --git a/src/app.rs b/src/app.rs
index fda01e7..bd08c6f 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -1,5 +1,5 @@
 use leptos::prelude::*;
-use leptos_meta::{provide_meta_context, MetaTags, Stylesheet, Title};
+use leptos_meta::{provide_meta_context, HashedStylesheet, MetaTags, Title};
 use leptos_router::{
     components::{Route, Router, Routes},
     hooks::{use_location, use_navigate, use_query_map},
@@ -39,6 +39,9 @@ pub fn shell(options: LeptosOptions) -> impl IntoView {
                 // once loaded via <link>/<img> on Safari/iOS.
                 <link rel="icon" media="(prefers-color-scheme: light)" href="/favicon-light.svg" type="image/svg+xml"/>
                 <link rel="icon" media="(prefers-color-scheme: dark)" href="/favicon-dark.svg" type="image/svg+xml"/>
+                // Server-side, so it can read hash.txt and link the
+                // content-hashed stylesheet (hash-files = true).
+                <HashedStylesheet id="leptos" options=options.clone()/>
                 <AutoReload options=options.clone()/>
                 <HydrationScripts options/>
                 <MetaTags/>
@@ -67,7 +70,6 @@ pub fn App() -> impl IntoView {
     provide_context(site);
 
     view! {
-        <Stylesheet id="leptos" href="/pkg/portal.css"/>
         <Suspense fallback=|| ()>
             {move || {
                 site.get()