Google finds my easyblog template not "mobile friendly"

Recently, google has enphasized "mobile friendliness" in its ranking of sites.

I use EzBlog 3.9 with the origami theme and a template "sphere" provided by yootheme on joomla! 3.4

http://www.leucateplage.fr/actualités

Google finds that buttons are too small (print,notification, share...) and that the text of the posts is too small.

What is the standard way to fix that ? Should I hack the theme css ? the template?

Thanks for your help.

Paul

NB : I did not find any entry on this subject in the forum. Iam the only one ?