I’m definitely going to try mini.css

Well, a new CSS framework pops up every month or so, I cannot really blame you for being tempted to try them. mini.css might suit your needs and, if nothing else, you can include it and forget it as it is really really lightweight, but I would suggest to spend an hour or so getting familiar with the documentation to make your life easier. Customization is pretty easy, even if you are a newbie, as far as you don’t go all crazy changing everything. Colors can be swapped out very easily and I am working on a couple of ideas to simplify the process even more in the future. If you do actually use it, feel free to report any issues, ask questions and seek overall support in the Issues section of the framework’s repository. ;)