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CSS Modular CSS with Sass Sass and BEM Styling the Headlines

Amber Wells
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Amber Wells
Front End Web Development Techdegree Student 18,493 Points

Headline margins not a part of %hdln-?

What would be the reason that Guil extends the code (with margin-bottom and margin-top in the %hdln-prim code) and adds on the margins again. Why not just combine all your code?