I'll create a dashboard card design that displays vehicle statistics with a clean, modern look. Here's a component that shows the number of vehicles, CO2 used, and LPG consumption:

This card design includes:

1. A clean header with the title "Fleet Overview"

2. Three key metrics displayed with appropriate icons:

   • Number of vehicles with a car icon
   • CO₂ emissions with a leaf icon
   • LPG consumption with a droplet icon

3. Each metric includes:

   • A descriptive label
   • The current value with appropriate units
   • A percentage change indicator that shows improvement (green) or decline (red)

The card is fully responsive and will adapt to different screen sizes, displaying the metrics in a single column on mobile devices and in three columns on larger screens.

You can customize the values, units, and percentage changes by passing different props to the component. The design uses subtle colors and spacing to create a clean, professional look that would fit well in a vehicle management dashboard.

I understand you need a more modular approach that can accommodate additional data in the future. Here's a dashboard design with separate cards for each metric that can be easily expanded:

This modular dashboard design offers several advantages:

1. Individual Stat Cards: Each metric has its own card with a consistent design pattern but unique visual identity through colors and icons.
2. Highly Extensible: The grid layout automatically adjusts as you add more cards, supporting 1-4 columns depending on screen size.

3. Reusable Components: The StatCard component is fully reusable and customizable:

   • Accepts any Lucide icon
   • Customizable colors for icons and backgrounds
   • Supports values with optional units
   • Shows change percentages with automatic color coding (green for improvement, red for decline)
   • Includes optional description text

4. Future-Ready: I've included three example additional cards to show how easily the dashboard can be expanded with new metrics like:

   • Fuel efficiency
   • Maintenance costs
   • Vehicle idle time
5. Responsive Design: The layout adjusts from 1 column on mobile to 4 columns on extra-large screens.
6. Contextual Indicators: The percentage changes are intelligently colored - for CO₂ emissions, a negative change is shown in green (since reduction is good), while for most other metrics, positive changes are green.

You can easily add more cards in the future by simply adding more StatCard components to the grid with your new metrics. The dashboard will automatically adjust the layout to accommodate them.