Stats preview card component, first attempt responsive design

This challenge was my first try for responsive design. I have an issue with my workflow: To check the responsive size of my elements I use the chrome developer tools. There I can adjust the width and the height of the viewport. But whenever I make a change in my code to adjust my design, the change is not being displayed in the browser. I always have to close the developer tool first and refresh the browser to see the changes of the design I have made. That is very laborious. In videos I have seen other programmers checking their responsive designs, and their changes are being displayed immediately (same as when I use live server in vs code). What am I doing wrong? Thanks for any support!