diff --git a/frontend/src/components/dashboard/v2/AlertBar.vue b/frontend/src/components/dashboard/v2/AlertBar.vue
index 74d61c8..966e79d 100644
--- a/frontend/src/components/dashboard/v2/AlertBar.vue
+++ b/frontend/src/components/dashboard/v2/AlertBar.vue
@@ -168,4 +168,24 @@ defineEmits<{
 .blk:hover {
   background: rgba(251,113,133,.22);
 }
+
+@media (max-width: 767px) {
+  .alertbar {
+    flex-wrap: wrap;
+    gap: 8px;
+    padding: 10px;
+  }
+
+  .seg {
+    flex: 0 0 calc(50% - 4px);
+  }
+
+  .sep {
+    display: none;
+  }
+
+  .blk {
+    margin-left: 0;
+  }
+}
 </style>
diff --git a/frontend/src/components/dashboard/v2/FlowCanvas.vue b/frontend/src/components/dashboard/v2/FlowCanvas.vue
index 014fb87..258cb81 100644
--- a/frontend/src/components/dashboard/v2/FlowCanvas.vue
+++ b/frontend/src/components/dashboard/v2/FlowCanvas.vue
@@ -288,12 +288,12 @@ function handleReset() {
         @click="handleReset"
       >
         <span class="btn-icon" v-html="icons.flow || ''"></span>
-        Reset
+        <span class="reset-label">Reset</span>
       </button>
 
-      <button class="add-btn" @click="emit('add')">
+      <button class="add-btn" @click="emit('add')" title="Agent hinzufügen">
         <span class="btn-icon" v-html="icons.plus || ''"></span>
-        Agent hinzufügen
+        <span class="add-label">Agent hinzufügen</span>
       </button>
     </div>
 
@@ -481,4 +481,28 @@ function handleReset() {
 :deep(.node.dragging) {
   cursor: grabbing;
 }
+
+@media (max-width: 767px) {
+  .add-label {
+    display: none;
+  }
+
+  .reset-label {
+    display: none;
+  }
+
+  .add-btn {
+    width: 34px;
+    padding: 0;
+    display: grid;
+    place-items: center;
+  }
+
+  .reset-btn {
+    width: 30px;
+    padding: 0;
+    display: grid;
+    place-items: center;
+  }
+}
 </style>
diff --git a/frontend/src/components/dashboard/v2/IrisChat.vue b/frontend/src/components/dashboard/v2/IrisChat.vue
index dcae8a4..f68f0d7 100644
--- a/frontend/src/components/dashboard/v2/IrisChat.vue
+++ b/frontend/src/components/dashboard/v2/IrisChat.vue
@@ -251,6 +251,22 @@ watch(
 
 @keyframes blink { 50% { opacity: 0; } }
 
+@media (max-width: 767px) {
+  .iris-panel {
+    width: 100%;
+    flex: 0 0 auto;
+    max-height: 45vh;
+  }
+
+  .chat-scroll {
+    max-height: 30vh;
+  }
+
+  .expand-btn {
+    display: none;
+  }
+}
+
 /* ── Input ───────────────────────────────────── */
 .chat-in {
   padding: 12px;
diff --git a/frontend/src/components/dashboard/v2/TaskStrip.vue b/frontend/src/components/dashboard/v2/TaskStrip.vue
index 1cc06b3..ec1ccca 100644
--- a/frontend/src/components/dashboard/v2/TaskStrip.vue
+++ b/frontend/src/components/dashboard/v2/TaskStrip.vue
@@ -146,4 +146,20 @@ function statusLabel(s: TaskItem['status']): string {
   padding: 12px;
   white-space: nowrap;
 }
+
+@media (max-width: 767px) {
+  .tstrip {
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
+    scrollbar-width: none;
+  }
+
+  .tstrip::-webkit-scrollbar {
+    display: none;
+  }
+
+  .tcard {
+    flex: 0 0 200px;
+  }
+}
 </style>
diff --git a/frontend/src/components/layout/Sidebar.vue b/frontend/src/components/layout/Sidebar.vue
index 9378224..7d8603a 100644
--- a/frontend/src/components/layout/Sidebar.vue
+++ b/frontend/src/components/layout/Sidebar.vue
@@ -6,6 +6,14 @@ import { useAgentStore } from '../../stores/agents'
 import { useTaskStore } from '../../stores/tasks'
 import { navigation, icons } from '../../composables/icons'
 import type { NavGroupDef } from '../../composables/icons'
+
+defineProps<{
+  mobileOpen?: boolean
+}>()
+
+defineEmits<{
+  close: []
+}>()
 import NavGroup from './NavGroup.vue'
 import { initials } from '../../utils/format'
 
@@ -63,7 +71,8 @@ const dynamicNavigation = computed<NavGroupDef[]>(() => {
 </script>
 
 <template>
-  <aside class="sidebar">
+  <aside :class="['sidebar', { open: mobileOpen }]">
+    <button class="sidebar-close" @click="$emit('close')" v-html="icons.chevron_left || ''"></button>
     <!-- Brand -->
     <div class="side-top">
       <div class="brand-mark" v-html="icons.command || ''"></div>
@@ -171,6 +180,54 @@ const dynamicNavigation = computed<NavGroupDef[]>(() => {
   background: rgba(124,108,255,.06);
 }
 
+.sidebar-close {
+  display: none;
+}
+
+@media (max-width: 767px) {
+  .sidebar {
+    position: fixed;
+    left: 0;
+    top: 0;
+    z-index: 100;
+    height: 100vh;
+    width: 280px;
+    transform: translateX(-100%);
+    transition: transform 0.25s ease;
+  }
+
+  .sidebar.open {
+    transform: translateX(0);
+  }
+
+  .sidebar-close {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    position: absolute;
+    top: 18px;
+    right: 12px;
+    width: 30px;
+    height: 30px;
+    border-radius: 8px;
+    border: none;
+    background: transparent;
+    color: var(--tx-2);
+    cursor: pointer;
+    z-index: 1;
+  }
+
+  .sidebar-close:hover {
+    background: rgba(124,108,255,.1);
+    color: var(--tx);
+  }
+
+  .sidebar-close :deep(svg) {
+    width: 18px;
+    height: 18px;
+  }
+}
+
 .avatar {
   width: 34px;
   height: 34px;
diff --git a/frontend/src/components/layout/Topbar.vue b/frontend/src/components/layout/Topbar.vue
index b5c0b57..cf07afe 100644
--- a/frontend/src/components/layout/Topbar.vue
+++ b/frontend/src/components/layout/Topbar.vue
@@ -4,10 +4,17 @@ import { icons } from '../../composables/icons'
 defineProps<{
   connected?: boolean
 }>()
+
+defineEmits<{
+  'toggle-sidebar': []
+}>()
 </script>
 
 <template>
   <header class="topbar">
+    <!-- Hamburger (mobile only) -->
+    <button class="hamburger" @click="$emit('toggle-sidebar')" v-html="icons.list || ''"></button>
+
     <!-- Search -->
     <div class="search">
       <span class="search-icon" v-html="icons.search || ''"></span>
@@ -24,9 +31,9 @@ defineProps<{
     </span>
 
     <!-- Ask Iris Button -->
-    <button class="btn btn-primary">
+    <button class="btn btn-primary ask-iris-btn">
       <span class="btn-icon" v-html="icons.spark || ''"></span>
-      Ask Iris
+      <span class="ask-label">Ask Iris</span>
     </button>
   </header>
 </template>
@@ -138,4 +145,65 @@ defineProps<{
   height: 15px;
 }
 
+.hamburger {
+  display: none;
+}
+
+@media (max-width: 767px) {
+  .topbar {
+    padding: 0 14px;
+  }
+
+  .search {
+    flex: 1;
+    max-width: none;
+  }
+
+  .hamburger {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 34px;
+    height: 34px;
+    border-radius: 9px;
+    border: none;
+    background: transparent;
+    color: var(--tx-2);
+    cursor: pointer;
+    flex: 0 0 auto;
+  }
+
+  .hamburger:hover {
+    background: rgba(124,108,255,.1);
+    color: var(--tx);
+  }
+
+  .hamburger :deep(svg) {
+    width: 20px;
+    height: 20px;
+  }
+
+  .pill {
+    display: none;
+  }
+
+  .ask-iris-btn {
+    width: 32px;
+    height: 32px;
+    padding: 0;
+    display: grid;
+    place-items: center;
+    border-radius: 9px;
+    flex: 0 0 auto;
+  }
+
+  .ask-label {
+    display: none;
+  }
+
+  .ask-iris-btn .btn-icon {
+    display: flex;
+  }
+}
+
 </style>
diff --git a/frontend/src/layouts/NexusLayout.vue b/frontend/src/layouts/NexusLayout.vue
index 8c41bbb..0efb994 100644
--- a/frontend/src/layouts/NexusLayout.vue
+++ b/frontend/src/layouts/NexusLayout.vue
@@ -3,7 +3,9 @@
  * NexusLayout — V2 Dashboard Shell
  * Flex row, 100vh, overflow hidden.
  * Sidebar (248px) + Main (flex:1, flex-column)
+ * Mobile: Sidebar als Overlay mit Hamburger-Toggle
  */
+import { ref } from 'vue'
 import { RouterView } from 'vue-router'
 import { useAgentStore } from '../stores/agents'
 import GalaxyBackground from '../components/background/GalaxyBackground.vue'
@@ -11,14 +13,35 @@ import Sidebar from '../components/layout/Sidebar.vue'
 import Topbar from '../components/layout/Topbar.vue'
 
 const agentStore = useAgentStore()
+
+/* ── Mobile Sidebar State ───────────────────────── */
+const mobileMenuOpen = ref(false)
+
+function closeMobileMenu() {
+  mobileMenuOpen.value = false
+}
 </script>
 
 <template>
   <div class="nexus-layout">
     <GalaxyBackground />
-    <Sidebar />
+    <Sidebar
+      :mobile-open="mobileMenuOpen"
+      @close="closeMobileMenu"
+    />
+
+    <!-- Mobile Backdrop -->
+    <div
+      v-if="mobileMenuOpen"
+      class="mobile-backdrop"
+      @click="closeMobileMenu"
+    ></div>
+
     <main class="nexus-main">
-      <Topbar :connected="agentStore.isConnected" />
+      <Topbar
+        :connected="agentStore.isConnected"
+        @toggle-sidebar="mobileMenuOpen = !mobileMenuOpen"
+      />
       <div class="nexus-content">
         <RouterView />
       </div>
@@ -49,4 +72,22 @@ const agentStore = useAgentStore()
   overflow: hidden;
   min-height: 0;
 }
+
+.mobile-backdrop {
+  display: none;
+}
+
+@media (max-width: 767px) {
+  .nexus-main {
+    width: 100%;
+  }
+
+  .mobile-backdrop {
+    display: block;
+    position: fixed;
+    inset: 0;
+    z-index: 99;
+    background: rgba(0, 0, 0, 0.5);
+  }
+}
 </style>
diff --git a/frontend/src/views/Dashboard/FlowBoard.vue b/frontend/src/views/Dashboard/FlowBoard.vue
index 7724fe3..70fdb0b 100644
--- a/frontend/src/views/Dashboard/FlowBoard.vue
+++ b/frontend/src/views/Dashboard/FlowBoard.vue
@@ -177,4 +177,16 @@ onUnmounted(() => {
   min-width: 0;
   overflow: hidden;
 }
+
+@media (max-width: 767px) {
+  .board-body {
+    flex-direction: column;
+    padding: 8px;
+    gap: 10px;
+  }
+
+  .stage {
+    flex: 1;
+  }
+}
 </style>