Vector and MonoBook add mediawiki.skinning.interface module that includes h3 { padding-top: 0.5em; }, while some skins do not. As a result, weird appearance is created. See the below list.
So I propose test and change described in Special:Diff/3347620/3413921.
Thanks.
I haven't tested this, but wouldn't it fail to work because of the way TemplateStyles work? TemplateStyles prepends .mw-parser-output to all definitions, and since .skin-vector and .skin-monobook are parents of .mw-parser-output and not children of it, this would fail?
I also haven't tested, but I think the feature has been added by phabricator:T197617.
Aha, that's news to me! All good then. (Though the selectors should be body.skin-* if I'm reading the docs correctly.)
@Lens0021 Hi, how do you mean? Consider what exactly? If this is about changing some code, please add a comment in a Phabricator task. Thanks :)
I think there is a bug in Template:Main page/styles.css and it can be fixed by Special:Diff/3347620/3413921 this. But because the page is on protection, I am looking for someone who can edit instead of me. when I visitied the history of the page I has found you edited Template:Main page/styles.css quiet. Could I ask you for testing my proposal and editing as it? I am sorry for my last comment that omits too many things. Thank you!
@Lens0021 Ah thanks (both for the explanation and for looking into this)! I don't have enough time to test thoroughly so I just went ahead: https://www.mediawiki.org/w/index.php?diff=3438897&oldid=3347620
Template styles get scoped to .mw-parser-output by design, but as the .skin-vector and .skin-monobook classes are outside this area, they can't be used for scoping selectors, so this fix doesn't work.
I've instead reset the padding to 0 which makes the behaviour consistent across skins: https://www.mediawiki.org/w/index.php?title=Template%3AMain_page%2Fstyles.css&type=revision&diff=3452609&oldid=3452608