All colors used in Minerva are converted from Less variables
into CSS custom properties. A new file called CSSCustomProperties.less
is created in the skins.minerva.base.styles module to store
these custom properties and an ADR is provided on the rationale for
dropping support for browsers that don't support custom properties.
The new CSS custom properties follow Codex design token conventions
where possible (and noted when not).
Link colors are unique because their styles are defined in core,
so in that case the Less variables values are set to custom properties.
Those values are then fed back into MediaWiki core for core link
styling.
Also adds a temporary night-mode color palette under the
.skin-nightmode-1 class on the <html> element.
Bug: T356074
Change-Id: Ida1f14138f12bd3c600c264bde7b5100f9dbf4ff
Replacing 'mediawiki.ui/variables.less' @import with
new skin-aware 'mediawiki.skin.variables.less' standard.
Removing calls for 'mediawiki.skin.variables.less' in favor for
'minerva.variables.less' for consistency.
Also
- replacing several static values with new Codex design token featuring
skin variables of `background-color`, `color`, `border-*` and
`transition` categories
- renaming several Less variables to variable naming standard
- moving a small number of MinervaNeue specific variables into
'minderva.variables.less' file. Those should be replaced in mid-future
by Codex design tokens
Please note, that this patch is not replacing all values with
possible Codex tokens. It's just applying them on selected
categories for consistency for now to keep the patch easier reviewable.
Further replacements will be done in follow-up patches.
Bump MediaWiki core required version to >= v1.41.0.
Bug: T319381
Bug: T332541
Depends-On: I98c8cc27527533e2efb3b987ee34bc403e988b75
Change-Id: I86c5a35377541a784552c29456e0b8b507b3ee9c
`lazy-image-placeholder` is needed only when MobileFrontend is enabled.
So it makes sense to move those styles to mobile.init css. See more details here: T199351#6380240
Bug: T260406
Change-Id: I16ca734af33fb0f3c4c67f20bbca8631279d7778
