Css conflit of social login buttons

Hi

I am trying to add social login buttons using plugin addthis social sign with shortcut code given by the author on my custom login page .

<?php addthis_ssi();?>

when i check the source code its executing but the login buttons are not appearing due to css conflict .you can search for

please login

in source code , To the top of that you can see the code added by the plugin can some one please help me in fixing the issue .

here is my site link https://bit.ly/UVSiUD