Hi,
I’m trying to use the new headers to reproduce the current look of my site.
However when I use the left align in the header, the published /preview version is a lot more left aligned that the in the editor version - to the point their is no margin / padding at all.
The embedded preview can be a little funky with styles that are using the width of the page, but you can get a full screen preview that should be more reliable. Click the pop out (box and arrow) symbol right next to the copy symbol on the fake browser header in the preview.
As to how to actually fix the problem, I assume you want the boxes to match the text. So you’ll need to examine the css for the boxes and duplicate it for the text. Be sure to check multiple widths.