I often see people on here struggling with layouts and the general design of their projects. This resource helped me so much when starting out and thought it could be useful to people here.
Just read along with it and click the links at the end of each section to see the page transform before you. Each change is explained clearly and not just how it’s done but why it should be done.
I still refer back to this almost a year after having it shown to me. Hopefully it’ll help some people here too.
Edit: Don’t feel obliged to buy the book at the end, FCC will teach you more than enough CSS