Foundation-sites: don't work classes?

Why after installing foundation-sites are not working classes .columns .small-* .large -*, etc. As I understand it nothing works.

After installation: npm install --save foundation-sites
I added in the main scss file:

and it was no((( don't work classes in html, that is, they are not described in css file compiled...
what could be the problem?
June 14th 19 at 18:50
0 answer

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