How do I fix the size of image banner buttons in Dawn 2.0 theme?

[MikeBaguyo]

Hi! I'm using Dawn 2.0 theme, on the image banner, if I will have 2 buttons there, the boxes are not in the center and in the same length, it's adjusting based on the length of the text inside it. 

Just like this one, how can I make the boxes' size fixed? It's really awkward like that hahaha. If you can see, their space is not in the middle because it's adjusting based on how long the text inside is. 

My store url: chrisandleon.com

[MikeBaguyo]

This is how it looks like on mobile, I really hope someone can help me fix this design. It's really not pleasant. 😞