I have this tool that calculates prices Link to the homepage
It´s an iframe that I´ve included from an external tool that is also hosted at the same place as the WordPress.
The thing is, once I want to change something via CSS, it does not apply. The source is not as usuall, it is an /less/scaffolding.less what I don´t understand.
How can I apply CSS on this tool, it has his own css files, but it does not apply as well if I change stuff there.
Source: CSS – Stack Overflow