diff --git a/.claude/launch.json b/.claude/launch.json
new file mode 100644
index 0000000..41dbad1
--- /dev/null
+++ b/.claude/launch.json
@@ -0,0 +1,11 @@
+{
+  "version": "0.0.1",
+  "configurations": [
+    {
+      "name": "webcam",
+      "runtimeExecutable": "node",
+      "runtimeArgs": ["server.js"],
+      "port": 8444
+    }
+  ]
+}
diff --git a/public/app.css b/public/app.css
new file mode 100644
index 0000000..d3c6f6b
--- /dev/null
+++ b/public/app.css
@@ -0,0 +1,139 @@
+/* ════════════════════════════════════════════════════════════════════════════
+   AppRobotWebcam – gemeinsames Theme für Viewer (index.html) und Konfiguration
+   (config.html). Haus-Stil: helle Fläche, system-ui, weiche Karten mit Schatten,
+   dunkler Blur-Header. Video-/Bildflächen bleiben bewusst dunkel (Kontrast).
+   ════════════════════════════════════════════════════════════════════════════ */
+
+* { box-sizing: border-box; }
+
+body {
+  margin: 0;
+  font-family: system-ui, sans-serif;
+  background: #f5f6f8;
+  color: #1c1e21;
+}
+
+/* ── Header ──────────────────────────────────────────────────────────────── */
+header {
+  height: 48px;
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  padding: 0 20px;
+  position: sticky; top: 0; z-index: 10;
+  color: #fff;
+  background: rgba(20, 22, 26, 0.85);
+  backdrop-filter: blur(6px);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
+}
+header .logo { font-weight: bold; letter-spacing: 0.03em; }
+header .status { font-size: 0.85rem; color: rgba(255, 255, 255, 0.6); margin-right: auto; }
+
+.ml-auto { margin-left: auto; }
+
+/* Buttons / Links im Header */
+.hbtn {
+  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
+  background: transparent; border: none; color: #fff;
+  padding: 8px 12px; border-radius: 6px;
+  font: inherit; font-size: 0.9rem; cursor: pointer; text-decoration: none;
+}
+.hbtn:hover:not(:disabled) { background: rgba(255, 255, 255, 0.15); }
+.hbtn:disabled { opacity: 0.4; cursor: default; }
+.hbtn.primary { background: rgba(80, 180, 120, 0.30); }
+.hbtn.primary:hover:not(:disabled) { background: rgba(80, 180, 120, 0.48); }
+
+main { padding: 20px; }
+
+/* ── Kamera-Grid (index.html) ────────────────────────────────────────────── */
+#cameras {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
+  gap: 20px;
+}
+
+.cam-box {
+  position: relative;
+  background: #11131a;                 /* dunkle Karte für das Bild */
+  border-radius: 10px;
+  overflow: hidden;
+  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.12);
+}
+
+/* Live-MJPEG bzw. Snapshot-Bild – responsiv, dunkler Hintergrund */
+.cam-img {
+  display: block; width: 100%; aspect-ratio: 4 / 3;
+  background: #11131a; object-fit: contain;
+}
+
+.cam-label {
+  position: absolute; top: 8px; left: 10px; z-index: 2;
+  background: rgba(0, 0, 0, 0.55); padding: 3px 9px; border-radius: 6px;
+  font-size: 0.75rem; color: #fff;
+}
+
+/* Health-Anzeige unten links */
+.cam-info {
+  position: absolute; bottom: 8px; left: 10px; z-index: 2;
+  background: rgba(0, 0, 0, 0.6); padding: 3px 9px; border-radius: 6px;
+  font-size: 0.72rem; color: #d8d8d8;
+}
+.cam-info.ok   { color: #7ee29a; }
+.cam-info.warn { color: #ffc861; }
+.cam-info.crit { color: #ff8080; }
+
+/* Ein/Aus-Schalter + HD-Button (über dem Bild) */
+.cam-toggle, .cam-hdtest {
+  position: absolute; top: 8px; z-index: 2;
+  background: rgba(0, 0, 0, 0.55); color: #fff;
+  border: 1px solid rgba(255, 255, 255, 0.18); border-radius: 6px;
+  font: inherit; cursor: pointer; backdrop-filter: blur(2px);
+}
+.cam-toggle { right: 10px; width: 30px; height: 26px; font-size: 0.72rem; }
+.cam-hdtest { right: 48px; height: 26px; padding: 0 9px; font-size: 0.72rem; color: #8cf; }
+.cam-toggle:hover { background: rgba(60, 60, 60, 0.85); }
+.cam-hdtest:hover:not(:disabled) { background: rgba(40, 60, 90, 0.85); }
+.cam-hdtest:disabled { opacity: 0.4; cursor: default; }
+
+/* Snapshot-Modus: gross + fett über dem Einzelbild */
+.single-pic-banner {
+  position: absolute; top: 0; left: 0; right: 0; z-index: 3;
+  text-align: center; padding: 8px 4px;
+  font-size: 1.1rem; font-weight: bold; letter-spacing: 0.06em; text-transform: uppercase;
+  color: #ffcf6b; background: rgba(0, 0, 0, 0.7);
+}
+
+/* ── Karte / Tabelle (config.html) ───────────────────────────────────────── */
+.card {
+  background: #fff; border-radius: 10px; padding: 20px;
+  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08); max-width: 760px;
+}
+
+table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
+th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid #eceef1; }
+th { color: #65676b; font-weight: 600; }
+tr:last-child td { border-bottom: none; }
+
+select {
+  font: inherit; padding: 6px 10px;
+  border: 1px solid #ccd0d5; border-radius: 6px; background: #fff; cursor: pointer;
+}
+.warn-badge { color: #e08500; cursor: help; }
+.cur { color: #8a8d91; }
+
+.actions { margin-top: 18px; display: flex; align-items: center; gap: 14px; }
+.btn-primary {
+  background: #2e7d46; color: #fff; border: none; border-radius: 6px;
+  padding: 9px 18px; font: inherit; cursor: pointer;
+}
+.btn-primary:hover:not(:disabled) { background: #256e3c; }
+.btn-primary:disabled { opacity: 0.5; cursor: default; }
+
+#status { font-size: 0.85rem; color: #65676b; }
+#status.ok  { color: #2e7d46; }
+#status.err { color: #c0392b; }
+
+.hint {
+  margin-top: 18px; max-width: 760px;
+  font-size: 0.8rem; color: #8a8d91; line-height: 1.6;
+}
diff --git a/public/config.html b/public/config.html
index 3597db9..ed1749f 100644
--- a/public/config.html
+++ b/public/config.html
@@ -4,73 +4,32 @@
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>AppRobotWebcam · Konfiguration</title>
-  <style>
-    * { box-sizing: border-box; margin: 0; padding: 0; }
-    body { background: #0f0f0f; color: #e0e0e0; font-family: monospace; }
-
-    header {
-      display: flex; align-items: center; gap: 12px;
-      padding: 10px 16px; background: #1a1a1a; border-bottom: 1px solid #333;
-    }
-    h1 { font-size: 1rem; font-weight: normal; letter-spacing: 0.05em; }
-
-    a.back {
-      margin-left: auto; color: #8cf; text-decoration: none;
-      border: 1px solid #468; padding: 5px 12px; border-radius: 3px; font-size: 0.82rem;
-    }
-    a.back:hover { background: #1d2d3d; }
-
-    main { padding: 16px; max-width: 760px; }
-
-    table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
-    th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #2a2a2a; }
-    th { color: #888; font-weight: normal; }
-
-    select {
-      background: #1a1a1a; color: #e0e0e0; border: 1px solid #444;
-      padding: 4px 8px; font-family: monospace; font-size: 0.85rem; border-radius: 3px;
-    }
-    .warn-badge { color: #fb4; cursor: help; }
-    .cur { color: #777; }
-
-    .actions { margin-top: 16px; display: flex; align-items: center; gap: 14px; }
-    #saveBtn {
-      background: #2a4a2a; color: #8f8; border: 1px solid #4a8;
-      padding: 7px 16px; font-family: monospace; font-size: 0.85rem;
-      cursor: pointer; border-radius: 3px;
-    }
-    #saveBtn:hover:not(:disabled) { background: #3a6a3a; }
-    #saveBtn:disabled { opacity: 0.4; cursor: default; }
-
-    #status { font-size: 0.8rem; color: #888; }
-    #status.ok  { color: #6d6; }
-    #status.err { color: #f66; }
-
-    .hint { margin-top: 18px; font-size: 0.75rem; color: #666; line-height: 1.6; }
-  </style>
+  <link rel="stylesheet" href="app.css">
 </head>
 <body>
   <header>
-    <h1>AppRobotWebcam · Konfiguration</h1>
-    <a class="back" href="/">← zum Viewer</a>
+    <span class="logo">⚙ AppRobotWebcam · Konfiguration</span>
+    <a class="hbtn ml-auto" href="/">← zum Viewer</a>
   </header>
 
   <main>
-    <table>
-      <thead>
-        <tr><th>ID</th><th>Name</th><th>Live-Auflösung</th><th>aktuell</th></tr>
-      </thead>
-      <tbody id="rows"><tr><td colspan="4">lädt…</td></tr></tbody>
-    </table>
+    <div class="card">
+      <table>
+        <thead>
+          <tr><th>ID</th><th>Name</th><th>Live-Auflösung</th><th>aktuell</th></tr>
+        </thead>
+        <tbody id="rows"><tr><td colspan="4">lädt…</td></tr></tbody>
+      </table>
 
-    <div class="actions">
-      <button id="saveBtn" disabled>Speichern &amp; Anwenden</button>
-      <span id="status">lädt…</span>
+      <div class="actions">
+        <button id="saveBtn" class="btn-primary" disabled>Speichern &amp; Anwenden</button>
+        <span id="status">lädt…</span>
+      </div>
     </div>
 
     <p class="hint">
       Auflösungs-Änderung ist sofort aktiv (laufende Streams frieren kurz ein).<br>
-      „Aus" bzw. Wiedereinschalten wirkt erst nach Neuladen des Viewers.<br>
+      „Aus" schaltet in den Snapshot-Modus: kein Video, alle 5 s ein Einzelbild im Viewer.<br>
       ⚠ C920 (cam2) braucht bei kleinen 4:3-Auflösungen überdurchschnittlich Bandbreite (siehe doc/12).
     </p>
   </main>
diff --git a/public/index.html b/public/index.html
index 776aab2..424e039 100644
--- a/public/index.html
+++ b/public/index.html
@@ -4,111 +4,19 @@
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>AppRobotWebcam</title>
-  <style>
-    * { box-sizing: border-box; margin: 0; padding: 0; }
-    body { background: #0f0f0f; color: #e0e0e0; font-family: monospace; }
-
-    header {
-      display: flex; align-items: center; gap: 12px;
-      padding: 10px 16px; background: #1a1a1a; border-bottom: 1px solid #333;
-    }
-    h1 { font-size: 1rem; font-weight: normal; letter-spacing: 0.05em; }
-    #statusText { font-size: 0.8rem; color: #888; }
-
-    #snapAllBtn {
-      margin-left: auto;
-      background: #2a4a2a; color: #8f8; border: 1px solid #4a8;
-      padding: 5px 14px; font-family: monospace; font-size: 0.82rem;
-      cursor: pointer; border-radius: 3px; letter-spacing: 0.03em;
-    }
-    #snapAllBtn:hover:not(:disabled) { background: #3a6a3a; }
-    #snapAllBtn:disabled { opacity: 0.4; cursor: default; }
-
-    /* Config-Link – rechts neben dem Snapshot-Button */
-    #configLink {
-      color: #8cf; text-decoration: none; border: 1px solid #468;
-      padding: 5px 12px; border-radius: 3px; font-size: 0.82rem; letter-spacing: 0.03em;
-    }
-    #configLink:hover { background: #1d2d3d; }
-
-    /* Überlast-Banner */
-    #notice {
-      display: none; align-items: center; gap: 10px;
-      background: #4a2a2a; color: #fbb; border-bottom: 1px solid #a55;
-      padding: 8px 16px; font-size: 0.82rem;
-    }
-    #notice button {
-      background: #2a2a2a; color: #fcc; border: 1px solid #a55;
-      padding: 3px 10px; font-family: monospace; cursor: pointer; border-radius: 3px;
-    }
-
-    #cameras { display: flex; flex-wrap: wrap; gap: 12px; padding: 12px; }
-
-    .cam-box { position: relative; background: #000; border: 1px solid #2a2a2a; min-width: 320px; }
-
-    /* Live-MJPEG (multipart/x-mixed-replace) – nativ im <img> */
-    .cam-img { display: block; width: 640px; height: 480px; background: #111; object-fit: contain; }
-
-    .cam-label {
-      position: absolute; top: 5px; left: 8px; z-index: 2;
-      background: rgba(0,0,0,.65); padding: 2px 7px; border-radius: 3px;
-      font-size: 0.72rem; color: #ccc;
-    }
-    /* Health-Anzeige unten links: fps · drop% */
-    .cam-info {
-      position: absolute; bottom: 5px; left: 8px; z-index: 2;
-      background: rgba(0,0,0,.7); padding: 2px 7px; border-radius: 3px;
-      font-size: 0.7rem; color: #999;
-    }
-    .cam-info.ok   { color: #6d6; }
-    .cam-info.warn { color: #fb4; }
-    .cam-info.crit { color: #f66; }
-
-    /* Ein/Aus-Schalter oben rechts */
-    .cam-toggle {
-      position: absolute; top: 5px; right: 8px; z-index: 2;
-      background: rgba(0,0,0,.65); color: #ccc; border: 1px solid #444;
-      width: 26px; height: 22px; font-size: 0.7rem;
-      cursor: pointer; border-radius: 3px;
-    }
-    .cam-toggle:hover { background: rgba(60,60,60,.85); }
-
-    /* Snapshot-only-Kamera: Platzhalter statt Live-Bild */
-    .cam-placeholder {
-      display: flex; align-items: center; justify-content: center;
-      color: #444; font-size: 0.82rem; letter-spacing: 0.04em;
-    }
-
-    /* Snapshot-Modus: gross+fett über dem Einzelbild */
-    .single-pic-banner {
-      position: absolute; top: 0; left: 0; right: 0; z-index: 3;
-      text-align: center; padding: 8px 4px;
-      font-size: 1.15rem; font-weight: bold; letter-spacing: 0.06em;
-      text-transform: uppercase;
-      color: #fc6; background: rgba(0,0,0,.72);
-    }
-
-    /* Hi-Res-Test-Button (Phase 1) – links neben dem Ein/Aus-Schalter */
-    .cam-hdtest {
-      position: absolute; top: 5px; right: 40px; z-index: 2;
-      background: rgba(0,0,0,.65); color: #8cf; border: 1px solid #468;
-      height: 22px; padding: 0 7px; font-family: monospace; font-size: 0.7rem;
-      cursor: pointer; border-radius: 3px;
-    }
-    .cam-hdtest:hover:not(:disabled) { background: rgba(40,60,90,.85); }
-    .cam-hdtest:disabled { opacity: 0.4; cursor: default; }
-  </style>
+  <link rel="stylesheet" href="app.css">
 </head>
 <body>
   <header>
-    <h1>AppRobotWebcam</h1>
-    <span id="statusText">Verbinde...</span>
-    <button id="snapAllBtn" disabled>⬇ Snapshot alle</button>
-    <a id="configLink" href="config.html" title="Kamera-Konfiguration">⚙ Config</a>
+    <span class="logo">📷 AppRobotWebcam</span>
+    <span class="status" id="statusText">Verbinde…</span>
+    <button id="snapAllBtn" class="hbtn primary" disabled>⬇ Snapshot alle</button>
+    <a id="configLink" class="hbtn" href="config.html" title="Kamera-Konfiguration">⚙ Config</a>
   </header>
 
-  <div id="notice"></div>
-  <div id="cameras"></div>
+  <main>
+    <div id="cameras"></div>
+  </main>
 
   <script src="viewer.js" defer></script>
 </body>