diff --git a/apps/ui/templates/dashboard.html b/apps/ui/templates/dashboard.html
index 66b848f..f671489 100644
--- a/apps/ui/templates/dashboard.html
+++ b/apps/ui/templates/dashboard.html
@@ -458,7 +458,7 @@
                     <span class="refresh-icon" id="refresh-icon">↻</span>
                 </button>
                 <button class="collapse-all-btn" onclick="toggleAllRooms()" title="Alle Räume ein-/ausklappen">
-                    <span class="collapse-all-icon" id="collapse-all-icon">▼</span>
+                    <span class="collapse-all-icon collapsed" id="collapse-all-icon">▼</span>
                 </button>
             </div>
         </header>
@@ -468,10 +468,10 @@
             <section class="room">
                 <div class="room-header" onclick="toggleRoom('room-{{ loop.index }}')">
                     <h2 class="room-title">{{ room.name }}</h2>
-                    <span class="room-toggle" id="toggle-room-{{ loop.index }}">▼</span>
+                    <span class="room-toggle collapsed" id="toggle-room-{{ loop.index }}">▼</span>
                 </div>
                 
-                <div class="room-content" id="room-{{ loop.index }}">
+                <div class="room-content collapsed" id="room-{{ loop.index }}">
                     <div class="devices">
                     {% for device in room.devices %}
                     <div class="device-card" data-device-id="{{ device.device_id }}">