Update README.md

README.md

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-# HRV Wellness Insight App
-
-A Groq-powered HRV interpretation tool in the Welltory style.
-
-## Environment variable
-Create a secret in the Space named:
+---
+title: HRV Wellness Insight (Groq + Welltory Style)
+emoji: 💓
+colorFrom: pink
+colorTo: purple
+sdk: gradio
+sdk_version: "4.36.1"
+app_file: app.py
+pinned: false
+---
+
+# 💓 HRV Wellness Insight App
+
+A Groq-powered HRV interpretation tool in the Welltory style.
+
+### 🧠 What It Does
+Enter your HRV data (RMSSD, SDNN, HR, etc.) and get a personalized, science-backed explanation written like a supportive wellness coach.
+
+### 🔑 Setup
+Add a secret in your Space:
+
+GROQ_API_KEY = your_groq_api_key_here