Centering images and slider bar?

i have the Minimatica Theme, and i’ve changed quite a bit of coding around to allow for 6 images on the slider instead of 4, as well as some other tweaks.

but on some monitors everything is centered and looks great, and on others everything’s either shoved to the left, or the right, depending on the margin px i change it to.

is there a way to align it automatically, or universally, if that makes sense?

https://www.solecircus.com/