CSS Upgrade for Speedometer Chart

I need a CSS upgrade for the speedometer chart on my website. The chart is functional, but I want to enhance its look.

Requirements:
- Modify colors, gradients, shapes, and layouts
- Change font styles and sizes
- Implement based on my design reference (to be uploaded)

Ideal Skills:
- Proficiency in CSS
- Familiarity with JavaScript (for any interactive elements)
- Strong design sense
- Experience with chart customization

Please be ready to work closely with me on this.