How to change styles in Yandex Zen?

Question

css

I want to make an extension for Yandex so that each page is translated into custom colors. Or at least Yandex Zen. Duck, I don’t know how to open the code here, even just to look) Can someone explain to me if this can be done. You can call me dumb, because I just jumped into the topic of browser extensions

Answer 1

Yes, but they do not open in Zen, not through the menu, not through f12

I do not quite understand, throw a link where they do not open for you