diff --git a/.env.development b/.env.development
index 12314a1..32c9ba8 100644
--- a/.env.development
+++ b/.env.development
@@ -6,6 +6,6 @@ NEXT_PUBLIC_USE_MOCK_BACKEND_LOOP_START=false
 NEXT_PUBLIC_EXPORT_STATIC=false
 NEXT_PUBLIC_USE_CGI=false
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.875
+NEXT_PUBLIC_APP_VERSION=1.6.876
 NEXT_PUBLIC_CPL_MODE=json   # json (Entwicklungsumgebung) oder jsSimulatedProd (CPL ->CGI-Interface-Simulator) oder production (CPL-> CGI-Interface Platzhalter)
 
diff --git a/.env.production b/.env.production
index 751fbf4..9233132 100644
--- a/.env.production
+++ b/.env.production
@@ -5,5 +5,5 @@ NEXT_PUBLIC_CPL_API_PATH=/CPL
 NEXT_PUBLIC_EXPORT_STATIC=true
 NEXT_PUBLIC_USE_CGI=true
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.875
+NEXT_PUBLIC_APP_VERSION=1.6.876
 NEXT_PUBLIC_CPL_MODE=production
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d5ae230..54f6ae4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## [1.6.876] – 2025-09-08
+
+- WIP: dark mode Baugrüppenträger sttus
+
+---
 ## [1.6.875] – 2025-09-08
 
 - WIP: dark mode
diff --git a/components/main/kabelueberwachung/KabelueberwachungView.tsx b/components/main/kabelueberwachung/KabelueberwachungView.tsx
index c811e63..e00a49f 100644
--- a/components/main/kabelueberwachung/KabelueberwachungView.tsx
+++ b/components/main/kabelueberwachung/KabelueberwachungView.tsx
@@ -119,19 +119,23 @@ function KabelueberwachungView() {
   return (
     <div>
       <div className="mb-4">
-        {[1, 2, 3, 4].map((rack) => (
-          <button
-            key={rack}
-            onClick={() => changeRack(rack)}
-            className={`mr-2 ${
-              Number(activeRack) === Number(rack)
-                ? "bg-littwin-blue text-white p-1 rounded-sm"
-                : "bg-gray-300 p-1 text-sm"
-            }`}
-          >
-            Rack {rack}
-          </button>
-        ))}
+        {[1, 2, 3, 4].map((rack) => {
+          const isActive = Number(activeRack) === Number(rack);
+          return (
+            <button
+              key={rack}
+              onClick={() => changeRack(rack)}
+              aria-pressed={isActive}
+              className={`mr-2 px-2 py-1 rounded-sm text-sm font-medium transition-colors focus:outline-none focus:ring-2 focus:ring-accent/50 ${
+                isActive
+                  ? "btn-primary"
+                  : "btn-muted text-fg-muted hover:text-fg"
+              }`}
+            >
+              Rack {rack}
+            </button>
+          );
+        })}
       </div>
       <div className="flex flex-row space-x-8 xl:space-x-0 2xl:space-x-8 qhd:space-x-16 ml-[5%] mt-[5%]">
         {(
diff --git a/mocks/device-cgi-simulator/SERVICE/digitalOutputsMockData.json b/mocks/device-cgi-simulator/SERVICE/digitalOutputsMockData.json
index 42fdc84..64f88b0 100644
--- a/mocks/device-cgi-simulator/SERVICE/digitalOutputsMockData.json
+++ b/mocks/device-cgi-simulator/SERVICE/digitalOutputsMockData.json
@@ -2,7 +2,7 @@
   "win_da_state": [
     1,
     1,
-    1,
+    0,
     1
   ],
   "win_da_bezeichnung": [
diff --git a/package-lock.json b/package-lock.json
index 4b8abb6..936ebe1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.875",
+  "version": "1.6.876",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cpl-v4",
-      "version": "1.6.875",
+      "version": "1.6.876",
       "dependencies": {
         "@fontsource/roboto": "^5.1.0",
         "@headlessui/react": "^2.2.4",
diff --git a/package.json b/package.json
index a26abb1..ea05cb4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.875",
+  "version": "1.6.876",
   "private": true,
   "scripts": {
     "dev": "next dev -p 3000",