Custom font not showing

Hello! 

Im new to Zendesk and I am trying to use a custom font.

I have added the fonts in the assets folder, made a @fontface in css file and preload the fonts in head. What am I missing here? 

In network in DevTools I can see the fonts are downloaded. And I can see text have my text has right font-family, but it is not showing.

Thank you in advance // Evelina