Zac,
I did answer your questions already, however I had to move all comments to this forum so it is a bit messed up since forum entries are not yet associated with each user.
The answer you are looking for can be found here: https://colorlibsupport.com/t/how-to-remove-white-space-around-header-images-and-or-logo-in-travelify/#post-2280
The thing why changing body
does nothing is because you are using H3
styling for your content so you need to adjust it instead of body
.
See above mentioned thread for more info and let me know if that helps.