This thread is resolved. My main goal was to use a custom font, as mentioned in the first post. Here's how I got it:
Then I registered the custom font using @font-face in the default.css file, like so:
@font-face {
font-family: 'Inter';
font-weight: 400;
font-style: normal;
font-stretch: normal;
src: local("Inter"), local("Inter-Regular"), url("../fonts/Inter.ttf") format("tff");
}