Features:

1. Home Screen:
- App title: "NeuroScreen"
- Navigation buttons: Cognitive Test, Speech Test, Eye Tracking Test, Tremor Test, Results
- Clean and simple mobile-friendly design

2. Cognitive Test Screen:
- Memory recall mini-game (show a sequence of numbers/images)
- Reaction-time test (tap when color changes)
- **AI Integration Placeholder:** Use OpenAI GPT (via serverless function) to analyze responses and provide feedback

3. Speech Test Screen:
- Record 5–10 seconds of user audio
- **AI Integration Placeholder:** Use OpenAI Whisper (via serverless function) to transcribe and analyze speech
- Display placeholder analysis results

4. Eye Tracking Test Screen:
- Show a moving dot for user to follow
- Placeholder for camera-based eye-tracking analysis

5. Tremor Test Screen:
- Ask user to hold phone still for a few seconds
- Placeholder for accelerometer-based tremor detection

6. Results Screen:
- Summarize all test results: Cognitive, Speech, Eye, Tremor
- Show recommendation: Normal / Abnormal / Refer to Specialist
- Include a “Generate Summary” button

Technical Requirements:
- Fully responsive and mobile-friendly
- Single-page application or modular pages using HTML/CSS/JS
- Include placeholders for **serverless API calls** for AI integration
- Store temporary results in browser localStorage
- Simple UI suitable for low-resource users
- Minimal external libraries; pure HTML/CSS/JS preferred
- Include clear comments explaining each section and how to replace placeholders with real API calls

Output:
- Generate a **ready-to-run mobile web app**
- Include navigation between screens and AI integration placeholders
- Comment each section for clarity
- Follow Up Deployment