Graham bemethavinci The .dummy {} is just a fake class as the file has to have some content to be recognised all it does is enable the xt_touch reference class for web devices and xtgem 'active' class which is used in the xtgem css templates and is the same as bootstrap uses (it is used in the navigation of my baretest site to highlight the 'active' item)
background image can be used in the background and background-image properties
https://www.w3schools.com/cssref/default.asp#background