However, this would create five columns that grow and shrink with different screen widths, but always stay at five columns, resulting in them becoming ridiculously narrow on small screens. The first thought might be to create a bunch of media queries and redefine the grid with different numbers of columns. That would work fine, but with the auto-fit keyword, it is all done automatically.
For auto-fit to work the way we want, we need to use the minmax() function. This tells the browser how small the columns can be squeezed down to followed by the maximum width they can expand to. Any smaller, and it will automatically reduce the number of columns. Any larger, and the number of columns increases.
