How can I align misaligned buttons horizontally?

I'm trying since a long time now to find a way to align the buttons (see photo below - "read more" buttons). There seems to be no option in Squarespace. I have an extension that can identify block and section IDs in Squarespace and I thought maybe if I can find out the block ID of each button, I can use CSS code I found on the internet to align them. However, it only shows the section ID for this (see photo) because I used a template for this featured posts section. 

Is there anything I can do to make them align?

Thanks