diff --git a/gui/chat.html b/gui/chat.html
index 7c48837..1454726 100644
--- a/gui/chat.html
+++ b/gui/chat.html
@@ -226,7 +226,7 @@ function addMessage(role, content, sources) {
         const doc  = s.source      || '';
         const path = s.header_path || '';
         chip.innerHTML = path
-          ? `<span class="src-doc">${esc(doc)}</span> › <span class="src-path">${esc(path)}</span>`
+          ? `<span class="src-doc">${esc(doc)}</span> &gt; <span class="src-path">${esc(path)}</span>`
           : `<span class="src-doc">${esc(doc)}</span>`;
         srcDiv.appendChild(chip);
       });
diff --git a/gui/chat_window.py b/gui/chat_window.py
index 20d1cd6..ae466f0 100644
--- a/gui/chat_window.py
+++ b/gui/chat_window.py
@@ -46,8 +46,8 @@ _THEMES = {
                 padding:8px 12px; font-size:14px;
             }
         """,
-        "theme_btn":  "background:#2a2a2a; color:#ececec; border:1px solid #3a3a3a; border-radius:6px; font-size:16px; padding:4px 8px;",
-        "icon":       "☀️",
+        "theme_btn":  "background:#2a2a2a; color:#ececec; border:1px solid #3a3a3a; border-radius:6px; font-size:12px; font-weight:600; padding:4px 8px;",
+        "icon":       "Chiaro",
     },
     "light": {
         "topbar":     "background:#f5f5f5; border-bottom:1px solid #e0e0e0;",
@@ -72,8 +72,8 @@ _THEMES = {
                 padding:8px 12px; font-size:14px;
             }
         """,
-        "theme_btn":  "background:#fff; color:#1a1a1a; border:1px solid #ddd; border-radius:6px; font-size:16px; padding:4px 8px;",
-        "icon":       "🌙",
+        "theme_btn":  "background:#fff; color:#1a1a1a; border:1px solid #ddd; border-radius:6px; font-size:12px; font-weight:600; padding:4px 8px;",
+        "icon":       "Scuro",
     },
 }
 
@@ -130,7 +130,7 @@ class ChatWindow(QMainWindow):
         tl.addStretch()
 
         self._theme_btn = QPushButton()
-        self._theme_btn.setFixedSize(36, 30)
+        self._theme_btn.setFixedSize(60, 30)
         self._theme_btn.setToolTip("Cambia tema")
         self._theme_btn.clicked.connect(self._toggle_theme)
         tl.addWidget(self._theme_btn)
@@ -212,7 +212,7 @@ class ChatWindow(QMainWindow):
         if not question:
             return
         if not self._collection:
-            self._js("addMessage('assistant', '⚠️ Seleziona una collezione prima di inviare.', [])")
+            self._js("addMessage('assistant', 'Seleziona una collezione prima di inviare.', [])")
             return
 
         self._input.clear()
@@ -236,7 +236,7 @@ class ChatWindow(QMainWindow):
 
     def _on_error(self, msg: str) -> None:
         self._js("removeThinking()")
-        self._js(f"addMessage('assistant', {json.dumps('❌ Errore: ' + msg)}, [])")
+        self._js(f"addMessage('assistant', {json.dumps('Errore: ' + msg)}, [])")
         self._set_enabled(True)
 
     # ── Helpers ───────────────────────────────────────────────────────────────
diff --git a/ingestion/ingest.py b/ingestion/ingest.py
index d02383e..e68c673 100644
--- a/ingestion/ingest.py
+++ b/ingestion/ingest.py
@@ -83,13 +83,13 @@ def check_ollama(model: str) -> bool:
             for m in models
         )
         if found:
-            print(f"✅ Ollama OK — {model} disponibile")
+            print(f"Ollama OK — {model} disponibile")
             return True
-        print(f"❌ Modello {model} non trovato in Ollama")
+        print(f"ERRORE: Modello {model} non trovato in Ollama")
         print(f"   → ollama pull {model}")
         return False
     except (urllib.error.URLError, OSError):
-        print("❌ Ollama non raggiungibile — assicurati che sia in esecuzione")
+        print("ERRORE: Ollama non raggiungibile — assicurati che sia in esecuzione")
         print("   → ollama serve")
         return False
 
@@ -116,18 +116,18 @@ def _ingest_stem(stem: str, collection: chromadb.Collection,
     """
     chunks_path = CHUNKS_DIR / stem / "chunks.json"
     if not chunks_path.exists():
-        print(f"❌ File non trovato: {chunks_path}")
+        print(f"ERRORE: File non trovato: {chunks_path}")
         return 0
 
     with open(chunks_path, encoding="utf-8") as f:
         chunks = json.load(f)
 
     if not chunks:
-        print(f"⚠️  {stem}: chunks.json è vuoto — skip")
+        print(f"AVVISO: {stem}: chunks.json e' vuoto — skip")
         return 0
 
     total = len(chunks)
-    print(f"  📄 {stem}: {total} chunk\n")
+    print(f"  {stem}: {total} chunk\n")
 
     ids        = []
     embeddings = []
@@ -167,7 +167,7 @@ def _ingest_stem(stem: str, collection: chromadb.Collection,
         eta  = int(avg * (total - i))
         done = f"[{offset + i:>6}/{offset + total}]"
         cid  = chunk["chunk_id"][:40]
-        print(f"  {done} ✓ {stem}/{cid:<40}  ETA: {eta}s", end="\r", flush=True)
+        print(f"  {done} {stem}/{cid:<40}  ETA: {eta}s", end="\r", flush=True)
 
         if len(ids) == 100:
             collection.add(ids=ids, embeddings=embeddings,
@@ -180,7 +180,7 @@ def _ingest_stem(stem: str, collection: chromadb.Collection,
 
     elapsed = int(time.monotonic() - start)
     print()
-    print(f"  ✅ {stem}: {total} chunk in {elapsed}s")
+    print(f"  OK {stem}: {total} chunk in {elapsed}s")
     return total
 
 
@@ -200,11 +200,11 @@ def ingest_multi(stems: list[str], collection_name: str,
 
     if collection_exists(client, collection_name):
         if not force:
-            print(f"⚠️  Collection '{collection_name}' già presente in ChromaDB — skip")
+            print(f"AVVISO: Collection '{collection_name}' gia' presente in ChromaDB — skip")
             print(f"   → usa --force per sovrascrivere")
             return True
         client.delete_collection(collection_name)
-        print(f"🗑️  Collection '{collection_name}' rimossa (--force)")
+        print(f"Collection '{collection_name}' rimossa (--force)")
 
     collection = client.create_collection(
         name=collection_name,
@@ -218,7 +218,7 @@ def ingest_multi(stems: list[str], collection_name: str,
             return False
         total_chunks += n
 
-    print(f"\n✅ Collection '{collection_name}': {total_chunks} chunk totali")
+    print(f"\nOK Collection '{collection_name}': {total_chunks} chunk totali")
     print(f"   Documenti: {', '.join(stems)}")
     print(f"   Percorso: {CHROMA_DIR}/")
     return True
@@ -266,10 +266,10 @@ def main() -> int:
     # ── Modalità multi-documento ─────────────────────────────────────────────
     if args.stems or args.collection:
         if not args.stems:
-            print("❌ --collection richiede --stems (es. --stems doc1 doc2 doc3)")
+            print("ERRORE: --collection richiede --stems (es. --stems doc1 doc2 doc3)")
             return 1
         if not args.collection:
-            print("❌ --stems richiede --collection (es. --collection archivio)")
+            print("ERRORE: --stems richiede --collection (es. --collection archivio)")
             return 1
         print(f"  Collection : {args.collection}")
         print(f"  Documenti  : {', '.join(args.stems)}\n")
@@ -280,7 +280,7 @@ def main() -> int:
     # ── Modalità singolo / tutti ─────────────────────────────────────────────
     stems = [args.stem] if args.stem else find_stems()
     if not stems:
-        print("❌ Nessun chunks.json trovato in chunks/")
+        print("ERRORE: Nessun chunks.json trovato in chunks/")
         return 1
 
     results = []
diff --git a/rag/rag.py b/rag/rag.py
index 3c18e52..4eae5e6 100644
--- a/rag/rag.py
+++ b/rag/rag.py
@@ -133,7 +133,7 @@ def answer(question: str, collection: chromadb.Collection, verbose: bool) -> Non
     try:
         chunks = retrieve(collection, question)
     except (urllib.error.URLError, OSError) as e:
-        print(f"❌ Errore embedding: {e}")
+        print(f"ERRORE embedding: {e}")
         return
 
     if verbose:
@@ -151,7 +151,7 @@ def answer(question: str, collection: chromadb.Collection, verbose: bool) -> Non
     try:
         response = call_ollama(prompt, system=system)
     except (urllib.error.URLError, OSError) as e:
-        print(f"❌ Errore generazione: {e}")
+        print(f"ERRORE generazione: {e}")
         return
 
     print(f"\n{response}\n")
@@ -234,13 +234,13 @@ def main() -> int:
     print()
 
     if not CHROMA_DIR.exists():
-        print("❌ chroma_db/ non trovata — esegui prima ingestion")
+        print("ERRORE: chroma_db/ non trovata — esegui prima ingestion")
         return 1
 
     client = chromadb.PersistentClient(path=str(CHROMA_DIR))
     collections = [c.name for c in client.list_collections()]
     if collection_name not in collections:
-        print(f"❌ Collection '{collection_name}' non trovata in chroma_db/")
+        print(f"ERRORE: Collection '{collection_name}' non trovata in chroma_db/")
         if args.stem:
             print(f"   → python ingestion/ingest.py --stem {collection_name}")
         else:
@@ -248,7 +248,7 @@ def main() -> int:
         return 1
 
     collection = client.get_collection(collection_name)
-    print(f"✅ Collection '{collection_name}' caricata ({collection.count()} chunk)\n")
+    print(f"OK Collection '{collection_name}' caricata ({collection.count()} chunk)\n")
 
     run_loop(collection)
     return 0
diff --git a/rag/retrieve.py b/rag/retrieve.py
index 3ebdc7d..866a8d8 100644
--- a/rag/retrieve.py
+++ b/rag/retrieve.py
@@ -134,7 +134,7 @@ def run_loop(collection: chromadb.Collection, top_k: int) -> None:
         try:
             chunks = retrieve(collection, query, top_k)
         except (urllib.error.URLError, OSError) as e:
-            print(f"❌ Errore embedding (Ollama raggiungibile?): {e}\n")
+            print(f"ERRORE embedding (Ollama raggiungibile?): {e}\n")
             continue
 
         print()
@@ -204,13 +204,13 @@ def main() -> int:
     print()
 
     if not CHROMA_DIR.exists():
-        print("❌ chroma_db/ non trovata — esegui prima ingestion", file=sys.stderr)
+        print("ERRORE: chroma_db/ non trovata — esegui prima ingestion", file=sys.stderr)
         return 1
 
     client = chromadb.PersistentClient(path=str(CHROMA_DIR))
     collections = [c.name for c in client.list_collections()]
     if collection_name not in collections:
-        print(f"❌ Collection '{collection_name}' non trovata in chroma_db/", file=sys.stderr)
+        print(f"ERRORE: Collection '{collection_name}' non trovata in chroma_db/", file=sys.stderr)
         if args.stem:
             print(f"   → python ingestion/ingest.py --stem {collection_name}", file=sys.stderr)
         else:
@@ -218,7 +218,7 @@ def main() -> int:
         return 1
 
     collection = client.get_collection(collection_name)
-    print(f"✅ Collection '{collection_name}' caricata ({collection.count()} chunk)\n")
+    print(f"OK Collection '{collection_name}' caricata ({collection.count()} chunk)\n")
 
     run_loop(collection, args.top_k)
     return 0