CSS styling methodology: From inside to outside or vice versa -

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When I'm styling a webpage, it is better to start with external external elements and to move inwards or in other ways. Close, out of the outside?

For example 

  & lt; Div class = outer & gt; & Lt; Div class = inner & gt; & Lt; / Div & gt; & Lt; / Div & gt; .ter {width: 170px; ... ...}. Player {height: 170px; ... ...}

What is sensible? Style first combines more specific instructions for external class and inner class or vice versa?

If this is a very common question, I apologize, but I always end up doing it randomly without any proper order, so I was curious to see that Have some suggestions and / or guidelines.

This allows me to create a pattern and layout first, and after that on the details of Go ahead.


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