how to associate a css stylesheet with an svg?

[d3guy]

I just learned that there are special css stylesheet constraints when loading an svg as an object reference on a webpage:

https://css-tricks.com/using-svg/

Storing an svg in it's own separate file provides good separation and maintainability so I'm guessing that the need to associate a css stylesheet with an svg loaded as an object on a webpage is a somewhat common scenario. Can you recommend any good techniques for this?