Cooding bootcamp slider solution with HTML, SASS and JS

hi guys, I am not happy with my effort on this project. I used CSS-grid for the first time to create this component just to practice it on a small project. But I was not able to code my solution efficiently. I am struggling with minmax and auto-fit property of CSS-grid. This code is getting messed up in (max-width: 800px min-width: 1200px) so feel free to suggest something for code.