You can do quite a bit with naming conventions. Classes are case sensitive. So, you can for example use uppercase camel case for your building blocks and lowerc

You can do quite a bit with naming conventions. Classes are case sensitive. So, you can for example use uppercase camel case for your building blocks and lowercase camel case for the things they are made of. There are also dashes and underscores. I use underscores for "modifiers". That is, classes which modify the look of some building block. E.g. "Button" is the usual one and "Button _large" is a large one. Custom elements will hopefully help to make this kind of structure a bit more popular. Right now they still have a few rough edges though.