What theme is and how it changes modules?

[wojwen]

When I add a theme I see that it contains mostly modules(like slider or featured products block), but it also changes overall look of the page. So what exactly is a theme containing? If I would buy another module(like coupon module) would it also change its look depending on theme?

Edited October 8, 2016 by wojwen (see edit history)

[rocky]

It depends on the theme and module being well designed. If the theme uses the same classes (such as .block) like the default theme and the coupon module also uses the same class, then the module should change to fit your theme. If the theme and module use different classes, it will not change to fit the theme and you'll need to modify the module to fit the theme.

[wojwen]

Thanks, that makes sense now