If you use both buttons side by side they don't align perfect, because the outlined buttons has +6px of height.
Just fix this with CSS and just change the width and the height back to normal. This is extremely simple, I had this issue when I was using wing. I fixed it just like this, this is mainly a flaw with Kabir's CSS. Kabir if you are reading this, please fix it, it can be extremely annoying sometimes when you are using wing. It brings down the amount of people that use this.
@talonbragg - There is already a pending PR #34
Fix #33 with padding instead box-shadow