diff --git a/release.sh b/release.sh
index 7693396..d3230ef 100755
--- a/release.sh
+++ b/release.sh
@@ -33,13 +33,24 @@ if [ "$NUR_RELEASE" = 0 ]; then
   (cd "$RELEASE" && git add mbmnet.3dsx mbmnet.cia mbmnet-shop.3dsx mbmnet-shop.cia mbmnet-installieren.gm9 version.txt && git commit -m "MBMNET-App v$VERSION" && git push)
 fi
 
+# --- MBMNET-Design fürs HOME-Menü (eigene Töne, Standard-Aussehen; für Anemone3DS) --------------
+THEME_TMP=$(mktemp -d)
+node theme/build-theme.js "$THEME_TMP" >/dev/null
+docker run --rm -v "$PWD":/app -v "$THEME_TMP":/out -w /app mbmnet-3ds-build \
+  bannertool makesmdh -s "MBMNET" -l "MBMNET-Design: eigene Töne im HOME-Menü" -p "MBMNET" -i icon.png -o /out/MBMNET/info.smdh >/dev/null
+DESIGNZIP="$(cd "$RELEASE" && pwd)/mbmnet-design.zip"
+rm -f "$DESIGNZIP"
+(cd "$THEME_TMP/MBMNET" && zip -q "$DESIGNZIP" body_LZ.bin info.smdh preview.png)
+
 # --- SD-Karten-Paket (wie bei MSET9/Hacks-Guide: am PC auf die SD entpacken, dann GM9-Skript starten) ---
 SDZIP="$(cd "$RELEASE" && pwd)/mbmnet-sd.zip"
 SDTMP=$(mktemp -d)
-mkdir -p "$SDTMP/cias" "$SDTMP/gm9/scripts" "$SDTMP/3ds"
+mkdir -p "$SDTMP/cias" "$SDTMP/gm9/scripts" "$SDTMP/3ds" "$SDTMP/Themes"
 cp "$RELEASE/mbmnet.cia" "$RELEASE/mbmnet-shop.cia" "$SDTMP/cias/"
 cp "$RELEASE/mbmnet-installieren.gm9" "$SDTMP/gm9/scripts/"
 cp "$RELEASE/mbmnet.3dsx" "$SDTMP/3ds/"
+cp "$DESIGNZIP" "$SDTMP/Themes/MBMNET-Design.zip"
+rm -rf "$THEME_TMP"
 cat > "$SDTMP/LIESMICH.txt" <<'TXT'
 MBMNET - Installation
 
@@ -52,9 +63,12 @@ MBMNET - Installation
 
 Ohne GodMode9: mbmnet.cia mit FBI installieren, oder 3ds/mbmnet.3dsx
 über den Homebrew Launcher starten.
+
+Freiwillig: Themes/MBMNET-Design.zip ist ein HOME-Menü-Design mit eigenen Tönen
+(Aussehen bleibt Standard). Mit Anemone3DS installieren.
 TXT
 rm -f "$SDZIP"
-(cd "$SDTMP" && zip -qr "$SDZIP" LIESMICH.txt cias gm9 3ds)
+(cd "$SDTMP" && zip -qr "$SDZIP" LIESMICH.txt cias gm9 3ds Themes)
 rm -rf "$SDTMP"
 echo "SD-Paket: $(du -h "$SDZIP" | cut -f1)"
 
@@ -82,7 +96,7 @@ else
 fi
 
 # Vorhandene Dateien gleichen Namens löschen (bei erneutem Lauf), dann hochladen
-for f in mbmnet-sd.zip mbmnet.cia mbmnet.3dsx mbmnet-shop.cia mbmnet-shop.3dsx mbmnet-installieren.gm9; do
+for f in mbmnet-sd.zip mbmnet-design.zip mbmnet.cia mbmnet.3dsx mbmnet-shop.cia mbmnet-shop.3dsx mbmnet-installieren.gm9; do
   [ -f "$RELEASE/$f" ] || continue
   for old in $(api GET "/releases/$ID/assets" | json "' '.join(str(a['id']) for a in d if a['name']=='$f')"); do
     api DELETE "/releases/$ID/assets/$old" >/dev/null
diff --git a/theme/build-theme.js b/theme/build-theme.js
new file mode 100644
index 0000000..59aa48b
--- /dev/null
+++ b/theme/build-theme.js
@@ -0,0 +1,203 @@
+// Baut das MBMNET-Design für das HOME-Menü (Anemone3DS): Standard-Aussehen, eigene Töne.
+//   node theme/build-theme.js <Ausgabeordner>
+// Ergebnis: <Ausgabe>/MBMNET/{body_LZ.bin, info.smdh, preview.png}  (info.smdh baut bannertool, siehe release.sh)
+//
+// Aufbau der Design-Datei (body) und des Ton-Abschnitts wie im Usagi 3DS Theme Editor (MIT,
+// github.com/usagirei/3DS-Theme-Editor): Kopf 0xD0 Bytes, Ton-Abschnitt = 2, 100, dann 8 Töne
+// (Cursor, App starten, Ordner, Schließen, Bildschirm 0-2, Deckel auf) mit Größe und Lautstärke.
+// Die Töne sind CWAV (PCM16, 22 kHz, mono), Aufbau wie 3dbrew/BCWAV bzw. libcwav.
+const fs = require('node:fs');
+const path = require('node:path');
+const zlib = require('node:zlib');
+
+const RATE = 22050;
+
+// --- Töne erzeugen ---------------------------------------------------------------------------
+
+// Ton aus Teiltönen: [{ f: Frequenz, t0: Start (s), d: Dauer (s), a: Lautstärke }], weiche Hüllkurve
+function synth(parts, total, { noise = 0 } = {}) {
+  const n = Math.round(total * RATE);
+  const out = new Float64Array(n);
+  let seed = 12345;
+  for (const p of parts) {
+    const s0 = Math.round(p.t0 * RATE), len = Math.round(p.d * RATE);
+    for (let i = 0; i < len && s0 + i < n; i++) {
+      const t = i / RATE;
+      const attack = Math.min(1, i / (0.004 * RATE));          // 4 ms Einschwingen (kein Knacken)
+      const decay = Math.exp(-t / (p.d / 4));                   // ausklingen
+      const f = p.f1 ? p.f + (p.f1 - p.f) * (i / len) : p.f;    // optional Gleiten
+      out[s0 + i] += p.a * attack * decay * Math.sin(2 * Math.PI * f * t)
+        + (p.a * 0.25) * attack * decay * Math.sin(4 * Math.PI * f * t);   // etwas Oberton: weicher Klang
+    }
+  }
+  if (noise) {   // gefiltertes Rauschen für "Wisch"-Töne
+    let lp = 0;
+    for (let i = 0; i < n; i++) {
+      seed = (seed * 1103515245 + 12345) & 0x7fffffff;
+      const white = seed / 0x3fffffff - 1;
+      lp += 0.08 * (white - lp);
+      const env = Math.sin(Math.PI * i / n) ** 2;
+      out[i] += noise * lp * env;
+    }
+  }
+  // Ende weich ausblenden (letzte 10 ms)
+  const fade = Math.round(0.01 * RATE);
+  for (let i = 0; i < fade; i++) out[n - 1 - i] *= i / fade;
+  const pcm = Buffer.alloc(n * 2);
+  for (let i = 0; i < n; i++) pcm.writeInt16LE(Math.max(-32767, Math.min(32767, Math.round(out[i] * 32767))), i * 2);
+  return pcm;
+}
+
+const SOUNDS = [
+  // 0 Cursor: weicher, kurzer Klick (statt Piepen)
+  synth([{ f: 1650, t0: 0, d: 0.035, a: 0.22 }], 0.045),
+  // 1 App starten: aufsteigender Zweiklang (MBMNET-Rot-Feeling: hell, freundlich)
+  synth([{ f: 659.3, t0: 0, d: 0.16, a: 0.30 }, { f: 987.8, t0: 0.08, d: 0.22, a: 0.30 }], 0.32),
+  // 2 Ordner: kurzer "Pop"
+  synth([{ f: 520, f1: 760, t0: 0, d: 0.07, a: 0.30 }], 0.08),
+  // 3 Schließen / zurück: absteigender Zweiklang
+  synth([{ f: 880, t0: 0, d: 0.10, a: 0.26 }, { f: 587.3, t0: 0.06, d: 0.14, a: 0.26 }], 0.22),
+  // 4-6 Bildschirm blättern: sanfter Wisch
+  synth([], 0.12, { noise: 0.35 }),
+  synth([], 0.12, { noise: 0.35 }),
+  synth([{ f: 440, f1: 660, t0: 0, d: 0.10, a: 0.10 }], 0.12, { noise: 0.30 }),
+  // 7 Deckel auf: kleiner Gong (drei Töne)
+  synth([{ f: 523.3, t0: 0, d: 0.30, a: 0.22 }, { f: 659.3, t0: 0.09, d: 0.30, a: 0.22 }, { f: 1046.5, t0: 0.18, d: 0.40, a: 0.22 }], 0.6),
+];
+
+// --- CWAV (PCM16, mono) ----------------------------------------------------------------------
+const align = (n, a) => (n + a - 1) & ~(a - 1);
+
+function cwav(pcm) {
+  const samples = pcm.length / 2;
+  const infoSize = 0x40;                       // 8 Kopf + 0x14 Werte + 4 Anzahl + 8 Verweis + 0x14 Kanal = 0x3C -> 0x40
+  const dataOff = 0x40 + infoSize;
+  const dataSize = align(0x20 + pcm.length, 0x20);
+  const file = Buffer.alloc(dataOff + dataSize);
+  // Kopf
+  file.write('CWAV', 0, 'latin1');
+  file.writeUInt16LE(0xFEFF, 4);
+  file.writeUInt16LE(0x40, 6);
+  file.writeUInt32LE(0x02010000, 8);
+  file.writeUInt32LE(file.length, 0x0C);
+  file.writeUInt16LE(2, 0x10);
+  file.writeUInt16LE(0x7000, 0x14); file.writeUInt32LE(0x40, 0x18); file.writeUInt32LE(infoSize, 0x1C);
+  file.writeUInt16LE(0x7001, 0x20); file.writeUInt32LE(dataOff, 0x24); file.writeUInt32LE(dataSize, 0x28);
+  // INFO
+  const I = 0x40;
+  file.write('INFO', I, 'latin1');
+  file.writeUInt32LE(infoSize, I + 4);
+  file.writeUInt8(1, I + 8);                   // PCM16
+  file.writeUInt8(0, I + 9);                   // keine Schleife
+  file.writeUInt32LE(RATE, I + 0x0C);
+  file.writeUInt32LE(0, I + 0x10);             // Schleifenanfang
+  file.writeUInt32LE(samples, I + 0x14);       // Ende = Anzahl Samples
+  file.writeUInt32LE(0, I + 0x18);
+  const table = I + 0x1C;                      // Verweistabelle der Kanäle
+  file.writeUInt32LE(1, table);
+  file.writeUInt16LE(0x7100, table + 4); file.writeUInt32LE(0x0C, table + 8);   // Kanal-Info relativ zur Tabelle
+  const ch = table + 0x0C;
+  file.writeUInt16LE(0x1F00, ch); file.writeUInt32LE(0x18, ch + 4);            // Samples relativ zu DATA+8
+  file.writeUInt16LE(0, ch + 8); file.writeUInt32LE(0xFFFFFFFF, ch + 0x0C);    // keine ADPCM-Infos
+  file.writeUInt32LE(0, ch + 0x10);
+  // DATA
+  file.write('DATA', dataOff, 'latin1');
+  file.writeUInt32LE(dataSize, dataOff + 4);
+  pcm.copy(file, dataOff + 0x20);
+  return file;
+}
+
+// --- Ton-Abschnitt (wie Usagi CwavBlock.Generate) ------------------------------------------
+function sfxBlock(files) {
+  const parts = [];
+  const u32 = (v) => { const b = Buffer.alloc(4); b.writeUInt32LE(v >>> 0); parts.push(b); };
+  u32(0x02); u32(0x64);
+  for (let i = 0; i < 8; i++) {
+    if (i === 4) for (const v of [0x00, 0x64, 0x00, 0x64, 0x64, 0x00, 0x64, 0x64, 0x00, 0x00, 0x00]) u32(v);
+    const f = files[i];
+    u32(f.length);
+    u32(f.length ? 0x50 : 1);                   // Lautstärke 80
+    parts.push(f);
+  }
+  return Buffer.concat(parts);
+}
+
+// --- Design-Datei (body) ---------------------------------------------------------------------
+function body(sfx) {
+  const header = Buffer.alloc(0xD0);
+  header.writeUInt32LE(1, 0);                  // Version
+  // 0x5 Hintergrundmusik aus, alle Zeichen-Arten 0 (Standard-Aussehen), alle Farb-Flags 0
+  header.writeUInt32LE(1, 0xB8);               // Töne an
+  header.writeUInt32LE(sfx.length, 0xBC);
+  header.writeUInt32LE(0xD0, 0xC0);
+  if (sfx.length > 0x2DC00) throw new Error(`Töne zu groß: ${sfx.length} Bytes`);
+  const raw = Buffer.concat([header, sfx]);
+  return Buffer.concat([raw, Buffer.alloc(align(raw.length, 0x10) - raw.length)]);
+}
+
+// --- LZ11 (nur Literale: immer gültig, die Datei ist ohnehin klein) ---------------------------
+function lz11(data) {
+  const out = [Buffer.from([0x11, data.length & 0xFF, (data.length >> 8) & 0xFF, (data.length >> 16) & 0xFF])];
+  for (let i = 0; i < data.length; i += 8) {
+    out.push(Buffer.from([0x00]));
+    out.push(data.subarray(i, i + 8));
+  }
+  return Buffer.concat(out);
+}
+
+function unlz11(buf) {   // zur Prüfung
+  const size = buf[1] | (buf[2] << 8) | (buf[3] << 16);
+  const out = Buffer.alloc(size);
+  let i = 4, o = 0;
+  while (o < size) {
+    const flags = buf[i++];
+    for (let b = 7; b >= 0 && o < size; b--) {
+      if (!(flags & (1 << b))) { out[o++] = buf[i++]; continue; }
+      throw new Error('komprimierte Blöcke nicht erwartet');
+    }
+  }
+  return out;
+}
+
+// --- Vorschau (412x480: oben 400x240 + unten 320x240), schlicht in MBMNET-Farben ---------------
+function preview() {
+  const W = 412, H = 480;
+  const rows = [];
+  for (let y = 0; y < H; y++) {
+    const row = Buffer.alloc(1 + W * 3);
+    for (let x = 0; x < W; x++) {
+      const top = y < 240;
+      const inScreen = top ? x < 400 : x >= 46 && x < 366;
+      let c = inScreen ? (top ? [0x22, 0x26, 0x2E] : [0x16, 0x19, 0x1F]) : [0, 0, 0];
+      // Logo-Quadrat in der Mitte oben
+      if (top && Math.abs(x - 200) < 40 && Math.abs(y - 110) < 40) c = [0xE4, 0x00, 0x2B];
+      row.set(c, 1 + x * 3);
+    }
+    rows.push(row);
+  }
+  const chunk = (t, d) => {
+    const len = Buffer.alloc(4); len.writeUInt32BE(d.length);
+    const crc = Buffer.alloc(4); crc.writeUInt32BE(zlib.crc32 ? zlib.crc32(Buffer.concat([Buffer.from(t), d])) >>> 0 : crc32(Buffer.concat([Buffer.from(t), d])));
+    return Buffer.concat([len, Buffer.from(t), d, crc]);
+  };
+  const ihdr = Buffer.alloc(13); ihdr.writeUInt32BE(W, 0); ihdr.writeUInt32BE(H, 4); ihdr[8] = 8; ihdr[9] = 2;
+  return Buffer.concat([Buffer.from([0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A]), chunk('IHDR', ihdr),
+    chunk('IDAT', zlib.deflateSync(Buffer.concat(rows))), chunk('IEND', Buffer.alloc(0))]);
+}
+function crc32(buf) {
+  let c, crc = 0xFFFFFFFF;
+  for (const b of buf) { c = (crc ^ b) & 0xFF; for (let k = 0; k < 8; k++) c = c & 1 ? 0xEDB88320 ^ (c >>> 1) : c >>> 1; crc = (crc >>> 8) ^ c; }
+  return (crc ^ 0xFFFFFFFF) >>> 0;
+}
+
+const outDir = path.join(process.argv[2] || '.', 'MBMNET');
+fs.mkdirSync(outDir, { recursive: true });
+const files = SOUNDS.map(cwav);
+const sfx = sfxBlock(files);
+const b = body(sfx);
+const packed = lz11(b);
+if (!unlz11(packed).equals(b)) throw new Error('LZ11-Prüfung fehlgeschlagen');
+fs.writeFileSync(path.join(outDir, 'body_LZ.bin'), packed);
+fs.writeFileSync(path.join(outDir, 'preview.png'), preview());
+for (let i = 0; i < files.length; i++) fs.writeFileSync(path.join(outDir, `..`, `ton-${i}.bcwav`), files[i]);
+console.log(`MBMNET-Design: body ${b.length} Bytes (Töne ${sfx.length}), gepackt ${packed.length} Bytes -> ${outDir}`);