Responsive single price grid component using CSS Grids..

Hey, it looks really good, well done! The responsiveness could be improved on a bit (check it between 500 and 700px) but that's easy to fix by setting a different breakpoint :) The only other issue I'd point out is "grid-item-3", where you're using a bunch of <p> tags for a list. There's actually a more semantic way to do this: using a <ul> and then <li>s for each list item! Other than this, I think your solution looks very neat.