Product preview card component just html and css

Hi, this is my second project all by myself. I've been studying html/css/js alone for 2 weeks now. Today I realized that I still have a long way to go, even looking at code from other devs I was not able to make mobile responsiveness work at all. It's going to be a rough road, but I won't stop now. When I have enough knowledge, I'll come back to finish the project, thank you.