The container is not 100% centralized if the message is short

[wagnerfillio]

Hi. very good job

I only need to report something on the design.
The container is not 100% centralized if the message is short.
I had to add a css, to improve something, can you fix it?
I have no knowledge in css.

until then, I did like this:

.snackbar-pos.bottom-center { left: calc(50% - 1.7em) !important; }