Alignment of Registration Form In Multisite

I’m testing multi-site functionality and have it all working (functionally speaking) the way I want. The only thing I need to modify is the way that the registration form is presented. Currently it’s left justified on a standard page template. Here’s the page in question https://filmmakersvillage.com/wp-signup.php
I’d like to be able to style this a little more attractively. Can someone get me pointed in the right direction?

Thanks in advance,

Dan