This is my first question on this website so here we go! I'm graphic and web designer. When creating sites or apps I don't deal with front end and I don't want (for now). All I do is UI/UX design, and developers are doing the rest. So what I'm sending to my clients are .ai or .psd files, nicely layered and named, exported buttons and images in .svg or .png. I understand that Bootstrap is front-end framework with it's philosophy and tools to easily make responsive and consistent websites. I also have basic knowledge of how markup languages like HTML and CSS work, but as I said I don't want to learn to code, I want to focus on design.
So after big introduction, where can I find tips how to design for Bootstrap? I found lot of free resources online but they all focus on coding, and they don't explain it from my perspective. I prefer to use Illustrator, but for tutorial that doesn't matter it could be Photoshop as well. Advices I need are something like "never ever put elements outside of the grid", "here is what you have to be aware of when designing for mobile", "always use this font sizes"...
TL;DR How to design Bootstrap website in Adobe illustrator or Photoshop, developers are doing the rest not me.