I currently moderate communities like m/AskKbin and I would like to know if there is anyway using CSS, I can make my community look more like old reddit or more compact, so the user don’t have to install a theme on their own and automatically see this style whenever they come to communities I moderate on Kbin.

If anyone can shed some light on this, I will edit and add the CSS instructions on this post so other mods can use it on their communities/magazines too.

BTW the reason I am asking this is because I have 0 knowledge when it comes to CSS.