Centered inline form


I would like to have my form centered horizontally with a button inline.

I have been using in the css field for the form and this for the HTM container having updated the form ID

My form is still on the left :-/.
I’ll be posting my links here under as the forum forbids me to have 3 links in this post.
Many thanks;

You can check the following staging website (username: powerrangers pswd: pawpatrol).