Forum:Can't bring infobox to my site

I'm not sure if this is where I should be asking this, but I'm having some real hair pulling difficulty getting this to work. So I'm building a wiki to store some character from a dnd I'm running and I'm trying to use the character infobox from the one piece wiki since it's a OP based dnd.

My template:https://ageoffp.fandom.com/wiki/Template:Char_Box

OP template: https://onepiece.fandom.com/wiki/Template:Char_Box

The issue is that when I take the entire page's source code and bring it to my page, everything loses its borders and colors change around a lot. I'm not sure if I'm doing something wrong or it's just because of the way I set up the theme settings or something.
 * The OnePiece Wiki uses quite a lot of customized design for their infoboxes, mainly under the "Infobox" section on their wiki css. To be able to have the same styling, you will need to copy that as well.  რპიδპა2   MW/Talk x  Cont  ribs  x  Con  tact   Me  22:37, November 5, 2020 (UTC)