[Plugin: BuddyPress Template Pack] My theme submit buttons css color is being changed by plugin

My sites submit buttons and search button colors are being changed to white by the template plugin here is my site https://www.somosguatemala.com it looks fine in firefox and in chrome just internet explorer the buttons appear in a diffrent color. the submit button and search buttons are white what can i do in the plugin files to make it not conflict with my submit buttons and search button colors.

https://www.ads-software.com/extend/plugins/bp-template-pack/