I stumbled upon one rule about web design and can't put my finger on what on earth the author meant. What is "a type scale" in this context? Is it implied that fonts must be paired depending on the contrasting effect when they are placed close together?
Design is a series of rules, whether you realize it or not. There are some simple, explicit rules. Lines of text should be around 66 characters wide. Text colors should have appropriate contrast so as to be accessible. Widows and rivers in paragraphs of text should be avoided; the variations in a type scale reduced to provided juxtaposition to each other. Full text