Admin Dashboard Design

Design an admin dashboard that provides a comprehensive overview of key metrics, user activities, and system performance. The dashboard should include various widgets displaying real-time data, such as user registrations, system usage statistics, and error logs. Ensure the interface is user-friendly, responsive, and visually appealing, making it easy for administrators to navigate and access important information quickly.

- **Key Metrics to Include:**
  - Total Users
  - Active Sessions
  - Recent User Registrations
  - System Performance (CPU Usage, Memory Usage)
  - Error Logs and Notifications

- **Design Considerations:**
  - Mobile responsive layout
  - Color schemes for clarity and aesthetics
  - Accessible design for all users
  
- **Functionality to Implement:**
  - Search functionality for quick access to user data
  - Filter options for logs and metrics
  - Export data functionality in CSV or Excel formats

# Output Format
The output should be a detailed description of the admin dashboard components, including visual layouts, functionality explanations, and any relevant user interface design elements, presented clearly and organized in sections.

# Examples
1. **User Statistics Widget:**
   - Display a chart showing daily user registrations, with options to filter by time period (last week, month, etc.).

2. **System Health Monitoring:**
   - A real-time status panel showing CPU and memory usage as a graph, with color codes indicating performance status (green for normal, red for critical).

3. **Error Notification Log:**
   - A scrollable section displaying the most recent system errors or warnings, with timestamps and severity levels indicated.

# Notes
Consider edge cases such as handling a sudden spike in user registrations or system errors. Ensure that the dashboard can scale and adapt to changing data inputs and user needs.