Table of Contents Spacing Issue on the Casper Theme

Themes
1

Hello! I followed the official tutorial to add the Table of Contents, but I noticed something odd.
After adding it, a space (I’m not sure what to call it) appears, which causes the upper part of the theme look uneven. The gap between the author section and the start of the content is now larger than before, creating an asymmetry.
You can also spot this issue in the thumbnail of the official guide:

table-of-contents
table-of-contents1839×1461 302 KB

Any thoughts on how to solve it?

2

Link your site. It’s probably a teeny bit of css, but it’s near impossible to write css without an install to work with.