diff --git a/frontend/pages/communication/chat.vue b/frontend/pages/communication/chat.vue
index 7626864..2f8f86d 100644
--- a/frontend/pages/communication/chat.vue
+++ b/frontend/pages/communication/chat.vue
@@ -146,6 +146,18 @@ const matrixCallDurationLabel = computed(() => {
   return `${minutes}:${seconds}`
 })
 
+const matrixCallPrimaryTile = computed(() =>
+  matrixCallTiles.value.find((tile) => tile.screenSharing) ||
+  matrixCallTiles.value.find((tile) => !tile.local && tile.videoTrack) ||
+  matrixCallTiles.value.find((tile) => tile.videoTrack) ||
+  matrixCallTiles.value[0] ||
+  null
+)
+
+const matrixCallSecondaryTiles = computed(() =>
+  matrixCallTiles.value.filter((tile) => tile.id !== matrixCallPrimaryTile.value?.id)
+)
+
 const roomCreateKeyPreview = computed(() =>
   normalizeRoomKey(roomCreateForm.value.key || roomCreateForm.value.name)
 )
@@ -396,6 +408,9 @@ const replyPreview = (message) => {
   return message.body || message.attachment?.fileName || "Nachricht"
 }
 
+const participantInitial = (tile) =>
+  (tile?.name || tile?.identity || "?").slice(0, 1).toUpperCase()
+
 const setReplyTarget = (message) => {
   matrixEditingMessage.value = null
   matrixReplyTarget.value = {
@@ -1766,15 +1781,43 @@ onBeforeUnmount(() => {
           v-if="matrixLiveKitRoom && matrixCallConnected"
           class="flex shrink-0 flex-wrap items-center justify-between gap-3 border-b border-primary/20 bg-primary/10 px-4 py-3"
       >
-        <div class="min-w-0">
+        <button
+            type="button"
+            class="min-w-0 text-left"
+            @click="matrixCallOpen = true"
+        >
           <p class="truncate text-sm font-medium text-highlighted">
             {{ matrixCallTitle }} läuft in {{ activeRoom.name }}
           </p>
           <p class="truncate text-xs text-muted">
             {{ matrixCallParticipantCount }} Teilnehmer · {{ matrixCallDurationLabel }} · {{ matrixCallStateLabel }}
           </p>
-        </div>
-        <div class="flex items-center gap-2">
+        </button>
+        <div class="flex flex-wrap items-center gap-2">
+          <UButton
+              :icon="matrixCallMicEnabled ? 'i-heroicons-microphone' : 'i-heroicons-microphone-slash'"
+              color="neutral"
+              :variant="matrixCallMicEnabled ? 'soft' : 'outline'"
+              size="sm"
+              :disabled="!matrixLiveKitRoom"
+              @click="toggleMatrixCallMic"
+          />
+          <UButton
+              :icon="matrixCallCameraEnabled ? 'i-heroicons-video-camera' : 'i-heroicons-video-camera-slash'"
+              color="neutral"
+              :variant="matrixCallCameraEnabled ? 'soft' : 'outline'"
+              size="sm"
+              :disabled="!matrixLiveKitRoom"
+              @click="toggleMatrixCallCamera"
+          />
+          <UButton
+              :icon="matrixCallScreenShareEnabled ? 'i-heroicons-computer-desktop' : 'i-heroicons-arrow-up-tray'"
+              color="neutral"
+              :variant="matrixCallScreenShareEnabled ? 'soft' : 'outline'"
+              size="sm"
+              :disabled="!matrixLiveKitRoom"
+              @click="toggleMatrixCallScreenShare"
+          />
           <UButton
               icon="i-heroicons-arrow-top-right-on-square"
               color="primary"
@@ -2232,44 +2275,17 @@ onBeforeUnmount(() => {
         class="h-[100dvh]"
     >
       <template #content>
-        <div class="flex h-[100dvh] flex-col bg-default">
-          <header class="flex shrink-0 items-center justify-between gap-3 border-b border-default px-4 py-3">
+        <div class="flex h-[100dvh] flex-col bg-inverted text-inverted">
+          <header class="flex shrink-0 items-center justify-between gap-3 border-b border-white/10 bg-black px-4 py-3">
             <div class="min-w-0">
-              <h3 class="truncate text-base font-semibold text-highlighted">
+              <h3 class="truncate text-base font-semibold text-white">
                 {{ matrixCallTitle }} · {{ activeRoom.name }}
               </h3>
-              <p class="truncate text-xs text-muted">
-                {{ activeRoomMatrixAddress }}
+              <p class="truncate text-xs text-white/60">
+                {{ matrixCallParticipantCount }} Teilnehmer · {{ matrixCallDurationLabel }} · {{ matrixCallStateLabel }}
               </p>
             </div>
             <div class="flex items-center gap-2">
-              <UButton
-                  icon="i-heroicons-microphone"
-                  color="neutral"
-                  :variant="matrixCallMicEnabled ? 'soft' : 'outline'"
-                  :disabled="!matrixLiveKitRoom"
-                  @click="toggleMatrixCallMic"
-              >
-                {{ matrixCallMicEnabled ? "Mikro an" : "Mikro aus" }}
-              </UButton>
-              <UButton
-                  icon="i-heroicons-video-camera"
-                  color="neutral"
-                  :variant="matrixCallCameraEnabled ? 'soft' : 'outline'"
-                  :disabled="!matrixLiveKitRoom"
-                  @click="toggleMatrixCallCamera"
-              >
-                {{ matrixCallCameraEnabled ? "Kamera an" : "Kamera aus" }}
-              </UButton>
-              <UButton
-                  icon="i-heroicons-computer-desktop"
-                  color="neutral"
-                  :variant="matrixCallScreenShareEnabled ? 'soft' : 'outline'"
-                  :disabled="!matrixLiveKitRoom"
-                  @click="toggleMatrixCallScreenShare"
-              >
-                {{ matrixCallScreenShareEnabled ? "Freigabe an" : "Freigeben" }}
-              </UButton>
               <UButton
                   icon="i-heroicons-arrows-pointing-in"
                   color="neutral"
@@ -2296,10 +2312,10 @@ onBeforeUnmount(() => {
             </div>
           </header>
 
-          <div class="min-h-0 flex-1 bg-muted">
+          <div class="min-h-0 flex-1 bg-black">
             <div
                 v-if="matrixCallLoading"
-                class="flex h-full items-center justify-center text-sm text-muted"
+                class="flex h-full items-center justify-center text-sm text-white/70"
             >
               Besprechung wird gestartet...
             </div>
@@ -2319,59 +2335,133 @@ onBeforeUnmount(() => {
                 v-else-if="canStartMatrixCall"
                 class="flex h-full flex-col"
             >
-              <div class="flex shrink-0 items-center justify-between border-b border-default bg-default px-4 py-2 text-xs text-muted">
-                <span>{{ matrixCallParticipantCount }} Teilnehmer · {{ matrixCallDurationLabel }}</span>
-                <span>{{ matrixCallStateLabel }}</span>
-              </div>
-              <div class="grid min-h-0 flex-1 auto-rows-fr gap-3 overflow-y-auto p-3 sm:grid-cols-2 xl:grid-cols-3">
-                <div
-                    v-for="tile in matrixCallTiles"
-                    :key="tile.id"
-                    class="relative min-h-52 overflow-hidden rounded-lg bg-inverted text-inverted"
-                    :class="tile.speaking ? 'ring-2 ring-primary' : ''"
-                >
-                  <video
-                      v-if="tile.videoTrack"
-                      :ref="(element) => setMatrixCallVideoElement(tile.id, element)"
-                      class="h-full w-full"
-                      :class="tile.screenSharing ? 'object-contain bg-black' : 'object-cover'"
-                      autoplay
-                      playsinline
-                      :muted="tile.local"
-                  />
+              <div class="flex min-h-0 flex-1 flex-col gap-3 p-3 lg:flex-row">
+                <div class="relative min-h-0 flex-1 overflow-hidden rounded-lg bg-zinc-950">
+                  <template v-if="matrixCallPrimaryTile">
+                    <video
+                        v-if="matrixCallPrimaryTile.videoTrack"
+                        :ref="(element) => setMatrixCallVideoElement(matrixCallPrimaryTile.id, element)"
+                        class="h-full min-h-[60dvh] w-full"
+                        :class="matrixCallPrimaryTile.screenSharing ? 'object-contain bg-black' : 'object-cover'"
+                        autoplay
+                        playsinline
+                        :muted="matrixCallPrimaryTile.local"
+                    />
+                    <div
+                        v-else
+                        class="flex h-full min-h-[60dvh] items-center justify-center bg-zinc-900"
+                    >
+                      <span class="flex size-24 items-center justify-center rounded-lg bg-primary/15 text-3xl font-semibold text-primary">
+                        {{ participantInitial(matrixCallPrimaryTile) }}
+                      </span>
+                    </div>
+                    <div class="absolute inset-x-0 bottom-0 flex items-center justify-between bg-black/65 px-4 py-3 text-sm text-white">
+                      <span class="truncate font-medium">
+                        {{ matrixCallPrimaryTile.name }}
+                        <span v-if="matrixCallPrimaryTile.screenSharing" class="ml-1 text-xs text-white/70">teilt Bildschirm</span>
+                      </span>
+                      <div class="flex items-center gap-2 text-white/80">
+                        <UIcon
+                            v-if="matrixCallPrimaryTile.screenSharing"
+                            name="i-heroicons-computer-desktop"
+                            class="size-4"
+                        />
+                        <UIcon
+                            v-if="!matrixCallPrimaryTile.screenSharing"
+                            :name="matrixCallPrimaryTile.microphoneEnabled ? 'i-heroicons-microphone' : 'i-heroicons-microphone-slash'"
+                            class="size-4"
+                        />
+                        <UIcon
+                            v-if="!matrixCallPrimaryTile.screenSharing"
+                            :name="matrixCallPrimaryTile.cameraEnabled ? 'i-heroicons-video-camera' : 'i-heroicons-video-camera-slash'"
+                            class="size-4"
+                        />
+                      </div>
+                    </div>
+                  </template>
                   <div
                       v-else
-                      class="flex h-full min-h-52 items-center justify-center bg-elevated text-highlighted"
+                      class="flex h-full min-h-[60dvh] items-center justify-center text-sm text-white/60"
                   >
-                    <span class="flex size-16 items-center justify-center rounded-lg bg-primary/10 text-xl font-semibold text-primary">
-                      {{ (tile.name || tile.identity || "?").slice(0, 1).toUpperCase() }}
-                    </span>
-                  </div>
-                  <div class="absolute inset-x-0 bottom-0 flex items-center justify-between bg-black/55 px-3 py-2 text-sm text-white">
-                    <span class="truncate">
-                      {{ tile.name }}
-                      <span v-if="tile.screenSharing" class="ml-1 text-xs opacity-80">teilt Bildschirm</span>
-                    </span>
-                    <div class="flex items-center gap-2">
-                      <UIcon
-                          v-if="tile.screenSharing"
-                          name="i-heroicons-computer-desktop"
-                          class="size-4"
-                      />
-                      <UIcon
-                          v-if="!tile.screenSharing"
-                          :name="tile.microphoneEnabled ? 'i-heroicons-microphone' : 'i-heroicons-microphone'"
-                          class="size-4"
-                          :class="tile.microphoneEnabled ? 'opacity-100' : 'opacity-35'"
-                      />
-                      <UIcon
-                          v-if="!tile.screenSharing"
-                          :name="tile.cameraEnabled ? 'i-heroicons-video-camera' : 'i-heroicons-video-camera-slash'"
-                          class="size-4"
-                      />
-                    </div>
+                    Warte auf Medien...
                   </div>
                 </div>
+
+                <div
+                    v-if="matrixCallSecondaryTiles.length"
+                    class="grid max-h-48 shrink-0 grid-cols-2 gap-2 overflow-y-auto lg:max-h-none lg:w-72 lg:grid-cols-1"
+                >
+                  <button
+                      v-for="tile in matrixCallSecondaryTiles"
+                      :key="tile.id"
+                      type="button"
+                      class="relative min-h-28 overflow-hidden rounded-lg bg-zinc-900 text-left"
+                      :class="tile.speaking ? 'ring-2 ring-primary' : ''"
+                  >
+                    <video
+                        v-if="tile.videoTrack"
+                        :ref="(element) => setMatrixCallVideoElement(tile.id, element)"
+                        class="h-full min-h-28 w-full"
+                        :class="tile.screenSharing ? 'object-contain bg-black' : 'object-cover'"
+                        autoplay
+                        playsinline
+                        :muted="tile.local"
+                    />
+                    <div
+                        v-else
+                        class="flex h-full min-h-28 items-center justify-center"
+                    >
+                      <span class="flex size-12 items-center justify-center rounded-lg bg-primary/15 text-lg font-semibold text-primary">
+                        {{ participantInitial(tile) }}
+                      </span>
+                    </div>
+                    <div class="absolute inset-x-0 bottom-0 flex items-center justify-between bg-black/60 px-2 py-1 text-xs text-white">
+                      <span class="truncate">{{ tile.name }}</span>
+                      <UIcon
+                          :name="tile.screenSharing ? 'i-heroicons-computer-desktop' : (tile.microphoneEnabled ? 'i-heroicons-microphone' : 'i-heroicons-microphone-slash')"
+                          class="size-3.5 shrink-0"
+                      />
+                    </div>
+                  </button>
+                </div>
+              </div>
+
+              <div class="flex shrink-0 flex-wrap items-center justify-center gap-2 border-t border-white/10 bg-black px-4 py-3">
+                <UButton
+                    :icon="matrixCallMicEnabled ? 'i-heroicons-microphone' : 'i-heroicons-microphone-slash'"
+                    color="neutral"
+                    :variant="matrixCallMicEnabled ? 'soft' : 'outline'"
+                    :disabled="!matrixLiveKitRoom"
+                    @click="toggleMatrixCallMic"
+                >
+                  {{ matrixCallMicEnabled ? "Mikro an" : "Mikro aus" }}
+                </UButton>
+                <UButton
+                    :icon="matrixCallCameraEnabled ? 'i-heroicons-video-camera' : 'i-heroicons-video-camera-slash'"
+                    color="neutral"
+                    :variant="matrixCallCameraEnabled ? 'soft' : 'outline'"
+                    :disabled="!matrixLiveKitRoom"
+                    @click="toggleMatrixCallCamera"
+                >
+                  {{ matrixCallCameraEnabled ? "Kamera an" : "Kamera aus" }}
+                </UButton>
+                <UButton
+                    :icon="matrixCallScreenShareEnabled ? 'i-heroicons-computer-desktop' : 'i-heroicons-arrow-up-tray'"
+                    color="neutral"
+                    :variant="matrixCallScreenShareEnabled ? 'soft' : 'outline'"
+                    :disabled="!matrixLiveKitRoom"
+                    @click="toggleMatrixCallScreenShare"
+                >
+                  {{ matrixCallScreenShareEnabled ? "Freigabe beenden" : "Bildschirm teilen" }}
+                </UButton>
+                <UButton
+                    icon="i-heroicons-phone-x-mark"
+                    color="error"
+                    variant="solid"
+                    @click="closeMatrixCall"
+                >
+                  Auflegen
+                </UButton>
               </div>
               <div ref="matrixCallAudioContainer" class="hidden" />
             </div>