wikimedia/mediawiki-extensions-Wikibase

/// Margins for a main/top heading in the center column.
///
/// The heading has $heading-margin-top on desktop
/// but no top margin on mobile.
/// A bottom margin is not defined.
@mixin marginForCenterColumnHeading() {
    @include marginForCenterColumn( $heading-margin-top, 0 );

    @media ( max-width: $breakpoint ) {
        margin-top: 0;
    }
}