Flexbox help with client first

Hi wondering if someone could help me here, I feel like I’m missing something basic…

All I’m trying to do is to center (vertically and horizontally) the text MAINTENANCE inside the card labelled services_item using flexbox. For some reason, none of the flexbox options changes anything?

I’m trying to design with the client first system and am going through and rebuilding components to try and better understand how everything works. In this instance, I’m trying to recreate the component labeled section_layout250.

Hopefully this makes sense, I think my issue is a simple flexbox one but I’m wondering if there’s a class messing with something that’s breaking what I’m trying to do.

Thanks!

Here’s a link to my site so far:
https://preview.webflow.com/preview/clone-b795b1?utm_medium=preview_link&utm_source=designer&utm_content=clone-b795b1&preview=515c93d1052b63f94d4d2738d19bf09d&workflow=preview


Here is my site Read-Only: LINK
(how to share your site Read-Only link)