How to change the default button style for modal popup?

Ratna,
Something is adding the class "art-button" to the button. That class is conflicting with the bootstrap styles that we include and changing the 'hover' behavior to be smaller where the bootstrap style for 'normal' is bigger.

You can try disabling the Bootstrap inclusion altogether, which may help, but it could cause some other issues.

I hope that helps explain and lets you investigate further, but if you need anything else from us, just let me know.

Thanks,
Alex

The btn and btn-primary classes are added by the module and using both of those is simply how Bootstrap works. Fortunately, it's easy to fix. To do so, create a template override by copying /modules/mod_sclogin/tmpl/login.php to /templates/<YOUR_TEMPLATE>/html/mod_sclogin/login.php (create any directories that don't already exist).
A template override makes sure that your changes won't be overridden when you update next.

Once copied, edit the new file. At the top, around line 16, you'll see:Simply update that line with whatever classes you want to set for the login button.

That should be it. Hopefully that gets you going, but if you need anything else, just let me know.

Finally, if you haven't already, please consider leaving a rating and review for JFBConnect, or our support, on the Joomla Extension Directory. It certainly isn't required, but is very appreciated:
extensions.joomla.org/extensions/social-...ook-integration/7215

Thanks,
Alex

The logout button is actually in the /modules/mod_sclogin/helper.php file. Around line 296, you'll see:Edit it there, for now. In the next release we'll be moving that block into the logout.php file so it can be properly overridden.

I hope that helps,
Alex