Backport #27697 by @silverwind
Fixes: https://github.com/go-gitea/gitea/issues/27604
Add negative margins so the header covers any shadow of active elements.
No rendering change of the content of the header because the padding
counteracts the effect.
<img width="128" alt="image"
src="https://github.com/go-gitea/gitea/assets/115237/
3d0f55b6-9351-4985-a290-
da9a92d15b4e">
Co-authored-by: silverwind <me@silverwind.io>
position: sticky;
top: 0;
z-index: 8;
- padding: 7px 0;
+ padding: 7px 5px;
+ margin: 0 -5px; /* negative margin so it covers active file shadow */
height: 44px; /* this height should match sticky-2nd-row */
background: var(--color-body);
}