Update app.py

app.py

@@ -23,7 +23,7 @@ if GOOGLE_API_KEY:
 else:
     logging.warning("کلید API گوگل (GOOGLE_API_KEY) تنظیم نشده است.")
 
-# --- دیکشنری کامل صداهای انگلیسی (همانند قبل) ---
+# --- دیکشنری کامل صداهای انگلیسی ---
 language_dict_persian_keys = {
     'انگلیسی (آمریکا) - جنی (زن)': 'en-US-JennyNeural', 'انگلیسی (آمریکا) - گای (مرد)': 'en-US-GuyNeural',
     'انگلیسی (آمریکا) - آنا (زن، صدای کودک)': 'en-US-AnaNeural', 'انگلیسی (آمریکا) - آریا (زن)': 'en-US-AriaNeural',
@@ -59,100 +59,109 @@ language_dict_persian_keys = {
 }
 
 async def translate_text_gemini_async(text, target_language="English"):
-    # logging.debug(f"Translate: '{text[:20]}...'")
-    if not model: logging.error("Gemini model not loaded."); return "Error: Translation service unavailable.", None
-    if not text or not text.strip(): logging.warning("Translate: Empty input text."); return "Error: Input text is empty.", None
+    if not model: logging.error("Gemini model not loaded."); return "خطا: سرویس ترجمه در دسترس نیست.", None
+    if not text or not text.strip(): logging.warning("Translate: Empty input text."); return "خطا: متن ورودی خالی است.", None
     try:
         prompt = f"Translate the following Persian text to {target_language}. Provide only the translated English text, naturally and fluently, without any extra phrases, explanations, or markdown formatting. Be concise and accurate.\n\nPersian: \"{text}\"\n{target_language}:"
         response = await model.generate_content_async(prompt)
         translated_text = response.text.strip()
         if translated_text.lower().startswith(f"{target_language.lower()}:"):
             translated_text = translated_text[len(target_language)+1:].strip()
-        return "Translation successful", translated_text
-    except Exception as e: logging.error(f"Gemini translation error: {e}", exc_info=True); return f"Translation error: {type(e).__name__}", None
+        return "ترجمه موفق", translated_text
+    except Exception as e: logging.error(f"Gemini translation error: {e}", exc_info=True); return f"خطا در ترجمه: {type(e).__name__}", None
 
 async def text_to_speech_edge_tts_async(text_to_speak, tts_voice_key, rate, volume, pitch):
-    # logging.debug(f"TTS: '{text_to_speak[:20]}...' Voice: {tts_voice_key}")
-    if not text_to_speak or not text_to_speak.strip(): logging.warning("TTS: Empty input text."); return "TTS Error: Input text is empty.", None
+    if not text_to_speak or not text_to_speak.strip(): logging.warning("TTS: Empty input text."); return "خطا در TTS: متن ورودی خالی است.", None
     voice_id = language_dict_persian_keys.get(tts_voice_key)
-    if voice_id is None: logging.error(f"TTS: Voice key '{tts_voice_key}' not found."); return f"TTS Error: Voice '{tts_voice_key}' not found.", None
+    if voice_id is None: logging.error(f"TTS: Voice key '{tts_voice_key}' not found."); return f"خطا در TTS: صدای '{tts_voice_key}' یافت نشد.", None
     try:
         rate_str, volume_str, pitch_str = f"{int(rate):+g}%", f"{int(volume):+g}%", f"{int(pitch):+g}Hz"
         communicate = edge_tts.Communicate(text_to_speak, voice_id, rate=rate_str, volume=volume_str, pitch=pitch_str)
-        with tempfile.NamedTemporaryFile(delete=False, suffix=".mp3") as tmp_file: tmp_path = tmp_file.name
-        await communicate.save(tmp_path)
-        return "TTS successful", tmp_path
-    except Exception as e: logging.error(f"Edge-TTS error: {e}", exc_info=True); return f"TTS Error: {type(e).__name__}", None
+        # Ensure tmp_path is correctly defined and used
+        with tempfile.NamedTemporaryFile(delete=False, suffix=".mp3") as tmp_file:
+            tmp_path = tmp_file.name
+        await communicate.save(tmp_path) # save to the path
+        return "TTS موفق", tmp_path
+    except Exception as e: logging.error(f"Edge-TTS error: {e}", exc_info=True); return f"خطا در TTS: {type(e).__name__}", None
 
-# --- مدیریت Event Loop (نسخه پایدارتر و دقیق‌تر) ---
 _thread_local = threading.local()
 
 def get_event_loop():
-    if not hasattr(_thread_local, 'loop'):
+    if not hasattr(_thread_local, 'loop') or _thread_local.loop.is_closed():
         _thread_local.loop = asyncio.new_event_loop()
-        logging.info(f"Created new event loop for thread {threading.get_ident()}")
+        logging.info(f"Created or reopened new event loop for thread {threading.get_ident()}")
     
-    # همیشه قبل از استفاده، لوپ را برای ترد فعلی تنظیم کنید
-    # این کار از بسیاری از خطاهای مربوط به "no current event loop" جلوگیری می‌کند
     try:
+        current_loop = asyncio.get_event_loop_policy().get_event_loop()
+        if current_loop is not _thread_local.loop:
+             asyncio.set_event_loop(_thread_local.loop)
+    except RuntimeError: # No current event loop or loop is different
         asyncio.set_event_loop(_thread_local.loop)
-    except RuntimeError as e:
-        # اگر لوپ در حال اجرا باشد، ممکن است این خطا رخ دهد.
-        # معمولا اگر get_event_loop() به درستی استفاده شود و لوپ بسته نشود،
-        # این حالت نباید زیاد پیش بیاید.
-        if "cannot be called from a running event loop" not in str(e).lower():
-             logging.warning(f"RuntimeError setting event loop (possibly already running): {e}")
-        # با این حال، اطمینان حاصل می‌کنیم که لوپ ما لوپ فعلی است
-        if asyncio.get_event_loop_policy().get_event_loop() is not _thread_local.loop:
-            asyncio.set_event_loop(_thread_local.loop) # تلاش مجدد اگر لوپ فعلی متفاوت بود
-
+        logging.info(f"Set event loop for thread {threading.get_ident()} as no current loop was found or it was different.")
     return _thread_local.loop
 
 
 def translate_and_speak_sync_wrapper(persian_text, english_tts_voice_key, rate, volume, pitch):
-    logging.info(f"Wrapper called. Text: '{persian_text[:20]}...' Voice: {english_tts_voice_key}")
-    loop = get_event_loop() # <<<<<<<<<<<<<<<<<<<<<<<<<< استفاده از get_event_loop اصلاح شده
+    logging.info(f"Wrapper called. Text: '{persian_text[:30]}...' Voice: {english_tts_voice_key}")
+    loop = get_event_loop()
     
+    audio_file_to_clean = None # Variable to store path for cleanup
+
     if not GOOGLE_API_KEY or not model:
-        msg = "خطا: سرویس ترجمه پیکربندی نشده است. لطفاً از تنظیم GOOGLE_API_KEY در Secrets اطمینان حاصل کنید."
+        msg = "خطا: سرویس ترجمه پیکربندی نشده است. لطفاً از تنظیم GOOGLE_API_KEY اطمینان حاصل کنید."
         logging.error(msg); return msg, None
     if not persian_text or not persian_text.strip():
         msg = "لطفاً متن فارسی را برای ترجمه وارد کنید."
         logging.warning(msg); return msg, None
+    if not english_tts_voice_key or english_tts_voice_key == "لیست خالی":
+        msg = "لطفاً یک صدای گوینده انتخاب کنید."
+        # Return Persian text if no voice selected, so user sees their input
+        logging.warning(msg); return persian_text, None 
+
     try:
-        # ترجمه
         translation_status_msg, translated_text = loop.run_until_complete(
             translate_text_gemini_async(persian_text)
         )
-        if "خطا" in translation_status_msg.lower() or not translated_text: # بررسی دقیق‌تر خطا
+        if "خطا" in translation_status_msg.lower() or not translated_text:
             err_msg = f"ترجمه ناموفق: {translation_status_msg} {translated_text or ''}"
             logging.error(err_msg); return err_msg, None
         
-        # تبدیل به گفتار
         tts_status_msg, audio_path = loop.run_until_complete(
             text_to_speech_edge_tts_async(translated_text, english_tts_voice_key, rate, volume, pitch)
         )
-        if "خطا" in tts_status_msg.lower() or not audio_path: # بررسی دقیق‌تر خطا
+        
+        if "خطا" in tts_status_msg.lower() or not audio_path:
             err_msg = f"{translated_text}\n(خطای TTS: {tts_status_msg})"
-            logging.error(err_msg); return err_msg, None
-            
-        logging.info(f"عملیات موفق. مسیر صوت: {audio_path}")
+            logging.error(err_msg); return err_msg, None # Return translated text with TTS error
+        
+        audio_file_to_clean = audio_path # Mark for potential cleanup if needed by Gradio
+        logging.info(f"عملیات موفق. متن ترجمه شده: '{translated_text[:30]}...', مسیر صوت: {audio_path}")
         return translated_text, audio_path
+    
     except Exception as e:
         logging.error(f"خطای غیرمنتظره در wrapper: {e}", exc_info=True)
+        # Clean up temp file if an unexpected error occurs after its creation
+        if audio_file_to_clean and os.path.exists(audio_file_to_clean):
+            try:
+                os.remove(audio_file_to_clean)
+                logging.info(f"Cleaned up temporary audio file: {audio_file_to_clean}")
+            except OSError as oe:
+                logging.error(f"Error cleaning up temp file {audio_file_to_clean}: {oe}")
         return f"خطای داخلی سرور: {type(e).__name__}", None
 
-# --- تعریف تم و CSS (همان CSS زیبا با اصلاحات جزئی) ---
+# --- تعریف تم و CSS بهبود یافته ---
 FLY_PRIMARY_COLOR_HEX = "#2563EB" 
 FLY_SECONDARY_COLOR_HEX = "#059669" 
-FLY_ACCENT_COLOR_HEX = "#D97706" 
+FLY_ACCENT_COLOR_HEX = "#D97706" # نارنجی برای دکمه اصلی
 FLY_TEXT_COLOR_HEX = "#1F2937" 
 FLY_SUBTLE_TEXT_HEX = "#6B7280" 
-FLY_LIGHT_BACKGROUND_HEX = "#F9FAFB" 
+FLY_LIGHT_BACKGROUND_HEX = "#F3F4F6" # کمی رو��ن‌تر از قبل
 FLY_WHITE_HEX = "#FFFFFF"
 FLY_BORDER_COLOR_HEX = "#D1D5DB" 
 FLY_INPUT_BG_HEX = "#FFFFFF" 
-FLY_PANEL_BG_HEX = "#E0F2FE"
+FLY_PANEL_BG_HEX = "#E0F2FE" # آبی بسیار روشن برای پنل ترجمه
+FLY_SUCCESS_GREEN_HEX = "#059669" 
+FLY_ERROR_RED_HEX = "#DC2626" 
 
 app_theme = gr.themes.Soft(
     primary_hue=gr.themes.colors.blue,
@@ -161,176 +170,400 @@ app_theme = gr.themes.Soft(
     font=[gr.themes.GoogleFont("Vazirmatn"), "Arial", "sans-serif"],
 ).set(
     body_background_fill=FLY_LIGHT_BACKGROUND_HEX,
+    button_primary_background_fill=FLY_ACCENT_COLOR_HEX, 
+    button_primary_background_fill_hover=f"{FLY_ACCENT_COLOR_HEX}E0", 
+    button_primary_text_color=FLY_WHITE_HEX,
 )
 
-# CSS قبلی که زیبا بود، با اصلاحات بسیار جزئی و محتاطانه
-# تمرکز بر عدم دستکاری زیاد در ظاهر پیش‌فرض المان‌های ورودی
+# --- CSS بهبود یافته با دقت در f-string ---
+# IMPORTANT: Using ''' """ ''' to define the multi-line string to avoid f-string parsing issues with CSS's own curly braces.
+# If we were using f-string for CSS, all CSS '{' and '}' would need to be '{{' and '}}'.
 custom_css = f"""
 @import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700&display=swap');
 @import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');
 @import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
 :root {{
-    --fly-primary: {FLY_PRIMARY_COLOR_HEX}; --fly-secondary: {FLY_SECONDARY_COLOR_HEX};
-    --fly-accent: {FLY_ACCENT_COLOR_HEX}; --fly-text: {FLY_TEXT_COLOR_HEX};
-    --fly-subtle-text: {FLY_SUBTLE_TEXT_HEX}; --fly-light-bg: {FLY_LIGHT_BACKGROUND_HEX};
-    --fly-white: {FLY_WHITE_HEX}; --fly-border: {FLY_BORDER_COLOR_HEX};
-    --fly-input-bg: {FLY_INPUT_BG_HEX}; --fly-panel-bg: {FLY_PANEL_BG_HEX};
+    --fly-primary: {FLY_PRIMARY_COLOR_HEX}; 
+    --fly-secondary: {FLY_SECONDARY_COLOR_HEX};
+    --fly-accent: {FLY_ACCENT_COLOR_HEX}; 
+    --fly-text: {FLY_TEXT_COLOR_HEX};
+    --fly-subtle-text: {FLY_SUBTLE_TEXT_HEX}; 
+    --fly-light-bg: {FLY_LIGHT_BACKGROUND_HEX};
+    --fly-white: {FLY_WHITE_HEX}; 
+    --fly-border: {FLY_BORDER_COLOR_HEX};
+    --fly-input-bg: {FLY_INPUT_BG_HEX}; 
+    --fly-panel-bg: {FLY_PANEL_BG_HEX};
+    --fly-success: {FLY_SUCCESS_GREEN_HEX}; 
+    --fly-error: {FLY_ERROR_RED_HEX};
     --global-font: 'Vazirmatn', 'Inter', 'Poppins', Arial, sans-serif;
     --english-font: 'Poppins', 'Inter', Arial, sans-serif;
+    --border-radius-sm: 6px; 
+    --border-radius-md: 8px; 
+    --border-radius-lg: 12px;
+    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
+    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
+}}
+body {{
+    font-family: var(--global-font); 
+    direction: rtl; 
+    background-color: var(--fly-light-bg); 
+    color: var(--fly-text); 
+    line-height: 1.7; 
+    -webkit-font-smoothing: antialiased; 
+    -moz-osx-font-smoothing: grayscale; 
+    font-size: 15px;
+}}
+.gradio-container {{
+    max-width: 100% !important; 
+    width: 100% !important; 
+    min-height: 100vh; 
+    margin: 0 auto !important; 
+    padding: 0 !important; 
+    border-radius: 0 !important; 
+    box-shadow: none !important; 
+    background-color: var(--fly-light-bg) !important; 
+    display: flex; 
+    flex-direction: column;
+}}
+
+.app-header-fly {{
+    text-align: center; 
+    padding: 24px 15px;
+    background: linear-gradient(135deg, var(--fly-primary) 0%, var(--fly-secondary) 100%);
+    color: white; 
+    margin: 0 0 1.5rem 0; 
+    border-bottom-left-radius: 20px; 
+    border-bottom-right-radius: 20px;
+    box-shadow: 0 4px 12px -2px rgba(37, 99, 235, 0.2);
+}}
+.app-header-fly h1 {{
+    font-size: 1.8em !important; 
+    font-weight: 700 !important; 
+    margin: 0 0 6px 0; 
+    font-family: var(--english-font); 
+    letter-spacing: 0.5px;
+}}
+.app-header-fly p {{
+    font-size: 0.95em !important; 
+    margin-top: 4px; 
+    font-weight: 400; 
+    color: rgba(255, 255, 255, 0.9) !important;
+}}
+
+.main-content-area-fly {{
+    flex-grow: 1; 
+    padding: 0 1rem; 
 }}
-body {{font-family: var(--global-font); direction: rtl; background-color: var(--fly-light-bg); color: var(--fly-text); line-height: 1.6; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; font-size: 15px;}}
-.gradio-container {{max-width: 100% !important; width: 100% !important; min-height: 100vh; margin: 0 auto !important; padding: 0.8rem 0.6rem !important; border-radius: 0 !important; box-shadow: none !important; background-color: var(--fly-light-bg) !important; display: flex; flex-direction: column;}}
-.app-header-fly {{text-align: center; padding: 18px 10px; background-image: linear-gradient(125deg, var(--fly-primary) 0%, var(--fly-secondary) 100%); color: white; margin: 0 0 1.2rem 0; border-radius: 14px; box-shadow: 0 3px 10px -2px rgba(37, 99, 235, 0.18);}}
-.app-header-fly h1 {{font-size: 1.5em !important; font-weight: 700 !important; margin: 0 0 4px 0; font-family: var(--english-font);}}
-.app-header-fly p {{font-size: 0.85em !important; margin-top: 2px; font-weight: 400; color: rgba(255, 255, 255, 0.95) !important;}}
-.main-content-area-fly {{flex-grow: 1; padding: 0 0.3rem;}}
-.fly-submit-button-container .gr-button {{
-    background: var(--fly-accent) !important; margin-top: 0.8rem !important; padding: 11px 18px !important; 
-    transition: all 0.25s ease-in-out !important; color: white !important; font-weight: 600 !important; 
-    border-radius: 8px !important; border: none !important; 
-    box-shadow: 0 2px 6px -1px rgba(217, 119, 6, 0.25) !important; width: 100% !important; 
-    font-size: 0.95em !important; display: flex; align-items: center; justify-content: center;
-}}
-.fly-submit-button-container .gr-button:hover {{background: #B45309 !important; transform: translateY(-1px) !important; box-shadow: 0 4px 8px -1px rgba(217, 119, 6, 0.35) !important;}}
-
-/* --- استایل ورودی‌ها با حداقل تغییرات ممکن برای حفظ عملکرد --- */
-.gr-input > label + div > textarea, /* Textbox */
-.gr-input > label + div > input,    /* Text (اگر استفاده شود) */
-.gr-dropdown > label + div > div > select {{ /* Dropdown */
-    border-radius: 8px !important; 
-    border: 1.5px solid var(--fly-border) !important; 
+.content-wrapper {{ 
+    background-color: var(--fly-white); 
+    padding: 1.5rem; 
+    border-radius: var(--border-radius-lg); 
+    box-shadow: var(--shadow-md); 
+    margin-bottom: 1.5rem; 
+}}
+
+/* --- Styling inputs --- */
+.gr-input > label > span.label-text, .gr-dropdown > label > span.label-text {{
+    font-weight: 600 !important; 
+    color: #374151 !important; 
     font-size: 0.9em !important; 
+    margin-bottom: 6px !important; 
+    display: inline-block;
+}}
+.gr-input > label + div > textarea,
+.gr-dropdown > label + div > div > input, /* For searchable dropdown */
+.gr-dropdown > label + div > div > select {{
+    border-radius: var(--border-radius-md) !important; 
+    border: 1px solid var(--fly-border) !important;
+    font-size: 0.95em !important; 
     background-color: var(--fly-input-bg) !important;
     padding: 10px 12px !important; 
-    line-height: 1.5; 
+    line-height: 1.6; 
     width: 100% !important; 
     box-sizing: border-box !important;
-    -webkit-tap-highlight-color: transparent;
-    font-family: var(--global-font) !important;
+    -webkit-tap-highlight-color: transparent; 
+    font-family: var(--global-font) !important; 
     color: var(--fly-text) !important;
-    /* appearance: none; -webkit-appearance: none; -moz-appearance: none; /* موقتا حذف برای تست */
+    transition: border-color 0.2s ease, box-shadow 0.2s ease;
 }}
 .gr-input > label + div > textarea:focus,
-.gr-input > label + div > input:focus,
+.gr-dropdown > label + div > div > input:focus,
 .gr-dropdown > label + div > div > select:focus {{
     border-color: var(--fly-primary) !important;
-    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15) !important;
+    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2) !important; 
+    outline: none;
+}}
+.gr-dropdown svg.icon {{ 
+    right: auto !important; 
+    left: 10px !important; /* برای RTL */
 }}
-/* عدم استفاده از ::after برای دراپ داون در این مرحله */
 
-.gr-textbox[label*="ترجمه انگلیسی"] > label + div > textarea {{ /* اطمینان از اینکه target درست است */
+/* Output Textbox styling */
+/* Targeting both old and new Gradio versions for output textbox */
+.gr-textbox[label*="ترجمه انگلیسی"] > label + div > textarea, 
+.gradio-interface .output_text .gr-textbox[data-testid="textbox"] > label + div > textarea {{
     background-color: var(--fly-panel-bg) !important; 
-    border-color: #A5D5FE !important; 
-    min-height: 90px; 
+    border-color: #A5D5FE !important;
+    min-height: 100px; 
     font-family: var(--english-font) !important; 
-    font-size: 0.95em !important;
+    font-size: 1em !important;
+    color: #0C4A6E !important; 
+    font-weight: 500;
 }}
-.gr-panel, div[label="تنظیمات صدا"] > .gr-accordion > .gr-panel {{
-    border-radius: 8px !important; border: 1px solid var(--fly-border) !important; 
-    background-color: var(--fly-light-bg) !important; 
-    padding: 0.7rem 0.9rem !important; 
-    margin-top: 0.5rem; box-shadow: none;
-}}
-div[label="تنظیمات صدا"] > .gr-accordion > button.gr-button {{
-    font-weight: 500 !important; padding: 7px 9px !important; border-radius: 6px !important; 
-    background-color: #E5E7EB !important; color: var(--fly-text) !important; 
-    border: 1px solid #D1D5DB !important; font-size: 0.85em;
-}}
-label > span {{font-weight: 500 !important; color: #4B5563 !important; font-size: 0.85em !important; margin-bottom: 5px !important; display: inline-block;}}
-.gr-slider {{ padding: 2px 0 !important;}}
-.gr-slider label span {{font-size: 0.8em !important; color: var(--fly-subtle-text);}}
-div[label="💡 نمونه"] {{margin-top: 1.2rem;}}
-div[label="�� نمونه"] .gr-button.gr-button-tool {{
-    background-color: #E0E7FF !important; color: var(--fly-primary) !important; 
-    border-radius: 6px !important; font-size: 0.75em !important; padding: 3px 7px !important;
-}}
-.custom-hr-fly {{height: 1px; background-color: var(--fly-border); margin: 1.2rem 0; border: none;}}
-.api-warning-message-fly {{background-color: #FFFBEB !important; color: #92400E !important; padding: 8px 10px !important; border-radius: 6px !important; border: 1px solid #FDE68A !important; text-align: center !important; margin: 0 0.2rem 0.8rem 0.2rem !important; font-size: 0.75em !important;}}
-.app-footer-fly {{text-align:center; font-size:0.7em; color: #6B7280; margin-top:1.5rem; padding-bottom: 0.8rem;}}
-footer, .gradio-footer {{display: none !important;}}
-
-@media (min-width: 640px) {{
+
+/* Accordion styling */
+.gr-accordion > button.gr-button {{ /* Accordion Header Button */
+    font-weight: 600 !important; 
+    padding: 10px 12px !important; 
+    border-radius: var(--border-radius-md) !important;
+    background-color: #E5E7EB !important; 
+    color: var(--fly-text) !important;
+    border: 1px solid #D1D5DB !important; 
+    font-size: 0.9em; 
+    margin-bottom: 0.5rem;
+    transition: background-color 0.2s ease;
+}}
+.gr-accordion > button.gr-button:hover {{ 
+    background-color: #D1D5DB !important; 
+}}
+.gr-accordion > div.gr-panel {{ /* Accordion Content Panel */
+    border-radius: var(--border-radius-md) !important; 
+    border: 1px solid var(--fly-border) !important;
+    background-color: var(--fly-white) !important; 
+    padding: 1rem !important; 
+    box-shadow: none;
+}}
+.gr-slider {{ 
+    padding: 8px 0 !important;
+}}
+.gr-slider label span {{
+    font-size: 0.85em !important; 
+    color: var(--fly-subtle-text);
+}}
+
+/* Submit Button - Relies on app_theme for primary color */
+.fly-submit-button .gr-button {{
+    width: 100% !important; 
+    padding: 12px 20px !important; 
+    font-size: 1em !important;
+    font-weight: 600 !important; 
+    border-radius: var(--border-radius-md) !important;
+    margin-top: 1rem !important; 
+    text-transform: uppercase; 
+    letter-spacing: 0.5px;
+    transition: background-color 0.2s ease, transform 0.1s ease;
+}}
+.fly-submit-button .gr-button:hover {{ 
+    transform: translateY(-2px); 
+}}
+
+/* Examples Section */
+div[id*="examples_section"] {{ /* More specific selector */
+    margin-top: 1.5rem; 
+}}
+div[id*="examples_section"] > .gr-panel {{ 
+    background-color: transparent !important; 
+    border: none !important; 
+    padding: 0 !important; 
+    box-shadow: none !important;
+}}
+div[id*="examples_section"] > .gr-form > button.gr-button.gr-button-secondary, /* Gradio 3.x */
+div[id*="examples_section"] .gr-sample-button /* Gradio 4.x */ {{ 
+    background-color: #E0E7FF !important; 
+    color: var(--fly-primary) !important;
+    border-radius: var(--border-radius-sm) !important; 
+    font-size: 0.85em !important; 
+    padding: 5px 10px !important;
+    border: 1px solid #C7D2FE !important; 
+    transition: background-color 0.2s ease;
+}}
+div[id*="examples_section"] > .gr-form > button.gr-button.gr-button-secondary:hover,
+div[id*="examples_section"] .gr-sample-button:hover {{ 
+    background-color: #C7D2FE !important; 
+}}
+div[id*="examples_section"] .gr-samples-header {{ 
+    font-weight: 600; 
+    color: #4B5563; 
+    font-size: 0.95em; 
+    margin-bottom: 0.8rem;
+}}
+
+
+.custom-hr-fly {{
+    height: 1px; 
+    background-color: var(--fly-border); 
+    margin: 1.8rem 0; 
+    border: none;
+}}
+.api-warning-message-fly {{
+    background-color: #FFFBEB !important; 
+    color: #92400E !important; 
+    padding: 12px 15px !important;
+    border-radius: var(--border-radius-md) !important; 
+    border: 1px solid #FDE68A !important;
+    text-align: center !important; 
+    margin: 0 0.5rem 1rem 0.5rem !important; 
+    font-size: 0.9em !important; 
+    font-weight: 500;
+}}
+.app-footer-fly {{
+    text-align:center; 
+    font-size:0.8em; 
+    color: var(--fly-subtle-text); 
+    margin-top:2rem; 
+    padding-bottom: 1rem;
+}}
+footer, .gradio-footer {{
+    display: none !important;
+}}
+
+/* Desktop improvements */
+@media (min-width: 768px) {{
     body {{font-size: 16px;}}
-    .gradio-container {{max-width: 600px !important; padding: 1rem !important; margin: 1rem auto !important; background-color: var(--fly-white) !important; border-radius: 16px !important; box-shadow: 0 5px 15px rgba(0,0,0,0.05) !important;}}
-    .app-header-fly {{ border-radius: 10px; padding: 18px 12px; margin: -1rem -1rem 1.5rem -1rem; }}
-    .app-header-fly h1 {{ font-size: 1.6em !important; }} .app-header-fly p {{ font-size: 0.9em !important; }}
+    .gradio-container {{
+        max-width: 800px !important; 
+        padding: 1.5rem !important; 
+        margin: 2rem auto !important; 
+        background-color: var(--fly-light-bg) !important; 
+        border-radius: 0; 
+        box-shadow: none;
+    }}
+    .app-header-fly {{ 
+        border-radius: var(--border-radius-lg); 
+        margin: -1.5rem -1.5rem 2rem -1.5rem; /* Extend to edges of container */ 
+    }}
+    .app-header-fly h1 {{ font-size: 2em !important; }} 
+    .app-header-fly p {{ font-size: 1em !important; }}
     .main-content-area-fly {{padding: 0;}}
-    .api-warning-message-fly {{margin-left: 0 !important; margin-right: 0 !important; font-size: 0.9em;}}
-    .main-content-row-fly > .gr-column {{ margin-bottom: 0 !important; }}
-    .main-content-row-fly {{ display: flex; flex-direction: row; gap: 1rem; }}
-    .main-content-row-fly > .gr-column:nth-child(1) {{ flex: 2; }}
-    .main-content-row-fly > .gr-column:nth-child(2) {{ flex: 1; }}
-    .fly-submit-button-container .gr-button {{ width: auto !important; align-self: flex-start; }}
-    .gr-input textarea, .gr-input input, .gr-dropdown select, .gr-textbox textarea {{ font-size: 0.95em; }}
-    label > span {{ font-size: 0.9em; }}
-    .app-footer-fly {{font-size:0.8em;}}
-}}
-"""
+    
+    .main-content-columns-fly {{ 
+        display: flex; 
+        flex-direction: row; 
+        gap: 1.5rem; 
+    }}
+    .main-content-columns-fly > .gr-column:nth-child(1) {{ 
+        flex: 3; /* Input column wider */ 
+    }}
+    .main-content-columns-fly > .gr-column:nth-child(2) {{ 
+        flex: 2; /* Output column */ 
+    }}
+    
+    .fly-submit-button .gr-button {{ 
+        width: auto !important; 
+        min-width: 200px;
+    }}
+    .api-warning-message-fly {{
+        margin-left: 0 !important; 
+        margin-right: 0 !important; 
+        font-size: 0.9em;
+    }}
+}}
+
+.result-area-fly {{ 
+    margin-top: 1rem; 
+}}
+.result-area-fly > .gr-block > .gr-form > .gr-input,
+.result-area-fly > .gr-block > .gr-form > .gr-audio {{ /* Ensure output elements also have some margin */
+    margin-bottom: 0.8rem;
+}}
+""" # End of f-string for CSS
 
 default_english_tts_voice = 'انگلیسی (آمریکا) - جنی (زن)'
-if not language_dict_persian_keys or default_english_tts_voice not in language_dict_persian_keys:
+if not language_dict_persian_keys :
+    logging.warning("Language dictionary is empty!")
+    default_english_tts_voice = None
+elif default_english_tts_voice not in language_dict_persian_keys:
     default_english_tts_voice = list(language_dict_persian_keys.keys())[0] if language_dict_persian_keys else None
 
-with gr.Blocks(theme=app_theme, css=custom_css, title="آموزش زبان فلای") as demo:
-    gr.HTML(f"""<div class="app-header-fly"><h1>Fly Language Learning</h1><p>ترجمه فارسی به انگلیسی و تلفظ با لهجه دلخواه</p></div>""")
+# --- Gradio UI با ساختار بهبود یافته ---
+with gr.Blocks(theme=app_theme, css=custom_css, title="آموزش زبان فلای | Fly Language Learning") as demo:
+    gr.HTML(f"""<div class="app-header-fly"><h1>Fly Language Learning 🚀</h1><p>ترجمه فارسی به انگلیسی و تلفظ با لهجه دلخواه</p></div>""")
     
     with gr.Column(elem_classes=["main-content-area-fly"]):
         if not GOOGLE_API_KEY or not model:
-            missing_key_msg = "⚠️ **ترجمه غیرفعال:** "
-            if not GOOGLE_API_KEY: missing_key_msg += "کلید API گوگل تنظیم نشده."
-            elif not model: missing_key_msg += "خطا در مدل Gemini."
-            gr.Markdown(f"<div class='api-warning-message-fly'>{missing_key_msg} لطفاً Secrets را بررسی کنید.</div>")
-
-        with gr.Row(elem_classes=["main-content-row-fly"]): 
-            with gr.Column(): 
-                input_text_persian = gr.Textbox(
-                    lines=3, label="📝 متن فارسی:", placeholder="اینجا بنویسید...",
-                )
-                language_dropdown_tts_english = gr.Dropdown(
-                    choices=list(language_dict_persian_keys.keys()) if language_dict_persian_keys else ["لیست خالی"],
-                    value=default_english_tts_voice, label="🗣️ انتخاب گوینده:", interactive=bool(language_dict_persian_keys)
-                )
-                with gr.Accordion("تنظیمات صدا", open=False): # اطمینان از لیبل صحیح برای CSS
-                    rate_slider = gr.Slider(-100, 100, 0, step=10, label="سرعت")
-                    volume_slider = gr.Slider(-100, 100, 0, step=10, label="حجم")
-                    pitch_slider = gr.Slider(-50, 50, 0, step=5, label="گام")
-                
-                with gr.Group(elem_classes=["fly-submit-button-container"]): # استفاده از Group
-                     submit_button = gr.Button("🚀 ترجمه و تلفظ", variant="primary")
+            missing_key_msg = "⚠️ **هشدار سرویس ترجمه:** "
+            if not GOOGLE_API_KEY: missing_key_msg += "کلید API گوگل (GOOGLE_API_KEY) تنظیم نشده است."
+            elif not model: missing_key_msg += "خطا در بارگذاری مدل Gemini."
+            gr.Markdown(f"<div class='api-warning-message-fly'>{missing_key_msg} بخش ترجمه غیرفعال خواهد بود. لطفاً تنظیمات Secrets ��ا بررسی کنید.</div>")
 
-            with gr.Column():
-                output_text_translated = gr.Textbox( label="📜 ترجمه انگلیسی:", interactive=False, lines=4, placeholder="ترجمه یا پیام خطا..." )
-                output_audio = gr.Audio(label="🎧 صوت:", type="filepath", format="mp3", interactive=False)
+        with gr.Box(elem_classes=["content-wrapper"]): # Wrapper for card styling
+            with gr.Row(elem_classes=["main-content-columns-fly"]): 
+                with gr.Column(scale=3): 
+                    input_text_persian = gr.Textbox(
+                        lines=4, label="📝 متن فارسی خود را وارد کنید:", placeholder="مثال: سلام، حال شما چطور است؟",
+                        elem_id="persian_input_textbox"
+                    )
+                    language_dropdown_tts_english = gr.Dropdown(
+                        choices=list(language_dict_persian_keys.keys()) if language_dict_persian_keys else ["لیست خالی"],
+                        value=default_english_tts_voice if default_english_tts_voice else "لیست خالی", 
+                        label="🗣️ گوینده و لهجه انگلیسی را انتخاب کنید:", 
+                        interactive=bool(language_dict_persian_keys and default_english_tts_voice is not None)
+                    )
+                    with gr.Accordion("⚙️ تنظیمات پیشرفته صدا", open=False):
+                        rate_slider = gr.Slider(minimum=-100, maximum=100, value=0, step=10, label="سرعت گفتار (Rate)")
+                        volume_slider = gr.Slider(minimum=-100, maximum=100, value=0, step=10, label="بلندی صدا (Volume)")
+                        pitch_slider = gr.Slider(minimum=-50, maximum=50, value=0, step=5, label="زیر و بمی صدا (Pitch)")
+                    
+                    with gr.Box(elem_classes=["fly-submit-button"]): 
+                         submit_button = gr.Button("ترجمه و پخش صدا", variant="primary", icon="▶️") # type: ignore
 
-        gr.HTML("<hr class='custom-hr-fly'>")
-        
-        example_list = []
-        if language_dict_persian_keys and default_english_tts_voice :
-            num_voices = len(language_dict_persian_keys)
-            voice_keys = list(language_dict_persian_keys.keys())
-            voice1_idx, voice2_idx, voice3_idx = 0, min(7, num_voices-1), min(13, num_voices-1)
-            example_list = [
+                with gr.Column(scale=2, elem_classes=["result-area-fly"]): 
+                    output_text_translated = gr.Textbox(
+                        label="📜 ترجمه انگلیسی:", interactive=False, lines=5, 
+                        placeholder="ترجمه متن شما در اینجا نمایش داده می‌شود...",
+                        elem_id="english_output_textbox"
+                    )
+                    output_audio = gr.Audio(label="🎧 فایل صوتی:", type="filepath", format="mp3", interactive=False)
+
+            if language_dict_persian_keys and default_english_tts_voice:
+                gr.HTML("<hr class='custom-hr-fly'>")
+                num_voices = len(language_dict_persian_keys)
+                voice_keys = list(language_dict_persian_keys.keys())
+                
+                voice1_idx = 0
+                voice2_idx = min(7, num_voices - 1) if num_voices > 1 else 0
+                voice3_idx = min(13, num_voices - 1) if num_voices > 1 else 0
+
+                example_list_data = [
                     ["قیمت این لباس چقدر است؟", voice_keys[voice1_idx], 0, 0, 0],
-                    ["می‌توانید آدرس را روی نقشه به من نشان دهید؟", voice_keys[voice2_idx], 0, 0, 0],
-                    ["ببخشید، متوجه نشدم. امکان دارد تکرار کنید؟", voice_keys[voice3_idx], -10, 0, 0],
+                    ["می‌توانید آدرس را روی نقشه به من نشان دهید؟", voice_keys[voice2_idx], 5, 0, 0],
+                    ["ببخشید، متوجه نشدم. امکان دارد تکرار کنید؟", voice_keys[voice3_idx], -10, 10, 0],
+                    ["یک قهوه و یک کیک لطفا.", voice_keys[min(3, num_voices -1) if num_voices > 0 else 0], 0, 0, 0], 
                 ]
+                 # Filter out examples if voice keys are not valid (e.g. num_voices is 0)
+                valid_example_list = []
+                if num_voices > 0:
+                    valid_example_list = example_list_data
+                else: # No voices, no examples
+                    logging.warning("No voices available for examples.")
+
+
+                if valid_example_list:
+                    gr.Examples(
+                        examples=valid_example_list,
+                        inputs=[input_text_persian, language_dropdown_tts_english, rate_slider, volume_slider, pitch_slider],
+                        outputs=[output_text_translated, output_audio],
+                        fn=translate_and_speak_sync_wrapper,
+                        label="💡 نمونه‌های آماده (برای امتحان کلیک کنید):",
+                        elem_id="examples_section" 
+                    )
         
-        if example_list:
-            gr.Examples(
-                examples=example_list,
-                inputs=[input_text_persian, language_dropdown_tts_english, rate_slider, volume_slider, pitch_slider],
-                outputs=[output_text_translated, output_audio],
-                fn=translate_and_speak_sync_wrapper, label="💡 نمونه" # اطمینان از لیبل صحیح
-            )
-        
-    gr.Markdown("<p class='app-footer-fly'>Fly Language Learning © ۲۰۲۴</p>")
+    gr.Markdown("<p class='app-footer-fly'>✨ Fly Language Learning © ۲۰۲۴ - قدرت گرفته از Gemini و EdgeTTS ✨</p>")
+
+    if 'submit_button' in locals(): # Check if button is defined (it should be)
+        submit_button.click(
+            fn=translate_and_speak_sync_wrapper,
+            inputs=[input_text_persian, language_dropdown_tts_english, rate_slider, volume_slider, pitch_slider],
+            outputs=[output_text_translated, output_audio]
+        )
+    else:
+        logging.error("Submit button was not initialized correctly.")
 
-    submit_button.click(
-        fn=translate_and_speak_sync_wrapper,
-        inputs=[input_text_persian, language_dropdown_tts_english, rate_slider, volume_slider, pitch_slider],
-        outputs=[output_text_translated, output_audio]
-    )
 
 if __name__ == "__main__":
-    if not language_dict_persian_keys: logging.critical("دیکشنری صداها خالی است!")
+    if not language_dict_persian_keys: 
+        logging.critical("CRITICAL: Voice dictionary (language_dict_persian_keys) is empty! The application might not function correctly.")
+    elif not default_english_tts_voice:
+        logging.warning("WARNING: No default English TTS voice could be set. Dropdown might be empty or non-interactive.")
+        
     demo.launch(server_name="0.0.0.0", server_port=7860, debug=True)