Modifying chart fonts and styles with CSS in Qlik Sense

[arixooo123]

I was wondering if there's a way to modify charts and other visualizations with CSS when embedding the apps in our web app.

As far as I researched I have found these methods to embed:

1- using iframes

2- using mashups

3- using div tags by Qlik Analytics plugin for visual studio

I appreciate if you let me know if there are any other methods and the level of customization by each of those methods.