Background image (Fb Login) + redirection

Hi Dears,
at first i want to say thank you for the work you did building this plugin 🙂

1) issue:
i tryed to change the background image for the ‘Fb Login’ button using this code:

#signup_form .the_champ_login_container{
background: url('http://www.arteurbano.net/wp-content/uploads/2017/04/iniciar-sesion-con-facebook2.png') center no-repeat !important;

}

But it doesn’ t work.
An example in: http://www.arteurbano.net/eventos

how can i resolve it?

2) issue:
When i logout, redirects to login.php and i want to redirect to a personal page or in the same user was surfing.
¿How can i do it?

3) +Plus:
In shortcode widget when user is logged, where you have got avatar, name and logout link… can i add more options like profile link, add events, etc?

Thank you very much for helping me!!! 🙂