horizontal alignment of share buttons

I started to test the plugin, I like everything so far but can’t figure out what CSS to use to horizontally align buttons I picked to be displayed, “Pinterest” is lower than everything else, “Tweet” is a little higher than “Pinterest” but lower than 5 other buttons.

I added the link to dev site, it has nothing but the plugin and few images for testing.
There is no custom CSS right now.

Thank you in advance for your help.
Jan.

The page I need help with: [log in to see the link]