Steven Zahm@ Oleg
re: is it possible to display tiles # depending of the screen size.
The only way I can think of doing this is to make the tiles variable width based on screen size but that would not limit the number of tile based on screen size. The latter there is no good way to do this because the page size would have to be known before the query is made. I suppose with some javascript this could be doable but would be greatly complicated by the fact of what to do when the person rotates the screen.
re: basically speaking in bootstrap terms, can i implement any classes here and how to address to tiles
There are a lot of classes available for CSS selectors. You can use the browser console to inspect them. Perhaps you can come up with a creative solution to get the result you are seeking. Of the top of my head I can not think of any to provide you some guidance, sorry.
Not certain my answer is helpful, but I do hope you do find it helpful.