How to apply the font family in CSS to overall UI screens?

Hi,

I imported in scss class.

@import "../fonts/Roboto-Black.ttf"; // And i included the scss class.

@include v-font(Roboto,'../fonts/Roboto'); But its not working.

Please give any suggestions or any sample code to Apply same font family the overall project …!

Thanks in advance…!

@import "MyDefaultTheme.scss";
@import "addons.scss";
@include font-face("arialunicodems", '../../../../MyDefaultTheme/fonts/arialunicodems');
$v-font-family: "arialunicodems";
.MyDefaultTheme {
  @include addons;
  @include MyDefaultTheme;
}