Stats Preview Card Component - Using HTML And CSS (Flexbox, Variables)

Hey guys. This is my first submission for a frontendmentor challenge. Do view the project and share your opinions. With every project, there might be a number of possible solutions and I would love to hear and understand your approach too. I'm new to CSS Custom properties and I'm exploring the numerous advantages it offers. If there is a better way to make use of it, do correct me and i will include it within the project. Also I have used flexbox and media queries for the responsiveness. I have added an extra media query to make it better on medium sized screens. Share your thoughts on that as well. Feedbacks are very much appreciated !!.