Hey @dsac ,
I don’t think tabs change in mobile, but I may be wrong. You have to create a tabs effect using other elements. See this post for an example: https://www.wix.com/corvid/forum/community-discussion/tabs-menu
The simplest solution to changing the appearance of a selected button would be to enable the non-selected ones and disable the selected ones. See here for more info: https://www.wix.com/corvid/reference/$w.Button.html#enabled
-Jeff