Hi, thanks for your response
According to what you comets I check the documentation and the problem that arises it is that the changes I made in the styles of the module, are css files that are in mysite/media/sourcecoast/css/ and even copy the default.css and Sourcecoast.css files to mysite/templates/mytemplate/html/mod_sclogin/themes/, as indicated in the documentation, to make an update anyway lose the changes I've made.
Any suggestions to solve the problem?
thanks greetings!