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pat barosy6,759 Points
2 different values for padding in header and summary
Can anyone explain why Mattox uses both em & percentage values for the padding selector in header and summary classes?
Caroline ForslundFront End Web Development Techdegree Graduate 36,096 Points
Because you want more exact padding for the top and bottom while you want more fluid padding on the sides. The em value will be a fixed value dependant on the font size it's inheriting it from. The percentage will mean less padding on the sides the more narrow the view is. Hope that makes sense.
To learn more about em values you can watch this video: https://teamtreehouse.com/library/em-units