diff --git a/src/App.vue b/src/App.vue
index 9dd509a..c6451b4 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -263,6 +263,22 @@
     <button class="intro-skip-btn" type="button" @click="skipIntro" data-i18n="intro_skip">Skip</button>
   </div>
 
+  <!-- ENERGEIA house strip — umbrella deployments only. One slim,
+       fully-clickable bar that dives back out to the umbrella site at
+       the origin root. ENERGEIA's monochrome language, not Plan-B's:
+       it reads as the house, not as part of this advisor. -->
+  <a v-if="isUmbrella" class="umbrella-strip" href="/">
+    <span class="umbrella-brand">
+      <span class="umbrella-mark" aria-hidden="true" v-html="energeiaMark"></span>
+      <span class="umbrella-word">ENERGEIA</span>
+      <span class="umbrella-tag" data-i18n="umbrella_part_of">A brand of the ENERGEIA family</span>
+    </span>
+    <span class="umbrella-back">
+      <span aria-hidden="true">←</span>
+      <span data-i18n="umbrella_back">Back to overview</span>
+    </span>
+  </a>
+
   <header class="site-header">
     <a class="logo" data-i18n="brand" href="#" aria-label="Back to landing page" @click.prevent="restartQuiz">Plan-B</a>
     <div class="header-right">
@@ -582,6 +598,18 @@
 
 <script setup>
 import { onMounted } from 'vue'
+import energeiaMark from './assets/energeia-mark.svg?raw'
+
+// ENERGEIA umbrella deployments (VITE_UMBRELLA=1 at build time) get the
+// house strip above the page chrome; standalone plan-b.now builds are
+// untouched. Same contract as kaiser-natron / kammergut-tiergenuss.
+// The strip is FIXED here (not static like the shops') because the
+// site-header is fixed and .app is a 100dvh shell — umbrella-mode
+// offsets both by --umbrella-h (see styles.css).
+const isUmbrella = import.meta.env.VITE_UMBRELLA === '1'
+if (isUmbrella && typeof document !== 'undefined') {
+  document.body.classList.add('umbrella-mode')
+}
 
 // ══════════════════════════════════════
 // TRANSLATIONS
@@ -594,6 +622,8 @@ const T = {
     og_locale: "en_US",
     hero_eyebrow: "Crisis Preparedness Advisor",
     hero_sub: "AI-Assisted Preparedness for Urban Households",
+    umbrella_part_of: "A brand of the ENERGEIA family",
+    umbrella_back: "Back to overview",
     hero_cta: "Begin",
     intro_l1: "For crisis bows to him who plans with care",
     intro_l2: "And fortune favors those who well prepare",
@@ -718,6 +748,8 @@ const T = {
     og_locale: "de_DE",
     hero_eyebrow: "⚡ Krisenvorsorge-Berater",
     hero_sub: "KI-gestützte Vorsorge für urbane Haushalte",
+    umbrella_part_of: "Eine Marke der ENERGEIA Familie",
+    umbrella_back: "Zurück zur Übersicht",
     hero_cta: "Beginnen",
     intro_l1: "Die Krise beugt sich dem, der wohl bedacht",
     intro_l2: "Und Glück gehört dem, der sich stark gemacht",
diff --git a/src/assets/energeia-mark.svg b/src/assets/energeia-mark.svg
new file mode 100644
index 0000000..fb65260
--- /dev/null
+++ b/src/assets/energeia-mark.svg
@@ -0,0 +1,40 @@
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+</svg>
diff --git a/src/styles.css b/src/styles.css
index 418230f..def114a 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -2302,3 +2302,73 @@ body.modal-open .app {
   filter: url(#paintGlossBtn);
   -webkit-filter: url(#paintGlossBtn);
 }
+
+/* ── ENERGEIA UMBRELLA STRIP ──────────────────────────────────────────
+   Umbrella deployments only (VITE_UMBRELLA=1 → body.umbrella-mode, see
+   App.vue). Values mirror the strip in the kaiser-natron / kammergut
+   umbrella branches — ENERGEIA paper/ink, house serif wordmark — but
+   the strip is FIXED: this site's header is fixed and .app is a 100dvh
+   shell, so a static bar would be overlapped at the top. Header and
+   app shell shift down by --umbrella-h. */
+body.umbrella-mode { --umbrella-h: 30px; }
+.umbrella-strip {
+  position: fixed;
+  top: 0; left: 0; right: 0;
+  z-index: 120; /* above .site-header (100), below intro overlay (1000) */
+  height: var(--umbrella-h, 30px);
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+  padding: 0 1.25rem;
+  background: #faf9f7; /* ENERGEIA paper */
+  color: #231f20; /* ENERGEIA ink */
+  border-bottom: 1px solid rgb(35 31 32 / 0.12);
+  font-family: ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
+  font-size: 0.72rem;
+  text-decoration: none;
+}
+.umbrella-strip:hover .umbrella-back {
+  text-decoration: underline;
+  text-underline-offset: 3px;
+}
+.umbrella-brand {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.55rem;
+  min-width: 0;
+}
+.umbrella-mark {
+  display: block;
+  width: 20px;
+  aspect-ratio: 215.2887 / 190.51906;
+  flex: none;
+}
+.umbrella-mark svg {
+  display: block;
+  width: 100%;
+  height: 100%;
+}
+.umbrella-word {
+  font-family: 'Georgia', 'Iowan Old Style', 'Times New Roman', serif;
+  font-size: 0.8rem;
+  letter-spacing: 0.14em;
+}
+.umbrella-tag {
+  opacity: 0.6;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+@media (max-width: 480px) {
+  .umbrella-tag { display: none; }
+}
+.umbrella-back {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.35rem;
+  white-space: nowrap;
+  font-weight: 600;
+}
+body.umbrella-mode .site-header { top: var(--umbrella-h); }
+body.umbrella-mode .app { padding-top: var(--umbrella-h); }