@import '../../variables.less';
@import 'mediawiki.mixins.less';

// Putting a `skin-vector-max-width` class on the body and wrapping the rules
// herein enables the ability to feature flag the max-width design. This is
// listed in the acceptance criteria of T246420. In other words, if this class
// is present, the max-width design will appear. Without this class, max-width
// design will not appear. In either case, the appearance should not be broken.
.skin-vector-max-width {
	@background-color-secondary--modern: #f8f9fa;
	@max-width-page-container: 1650px;
	@min-width-page-container--padded: @max-width-page-container + ( 2 * @padding-horizontal-page-container );
	@background-color-page-container: @background-color-base;
	@max-width-workspace-container: 1440px;
	@max-width-content-container: 960px;
	// TODO: Remove @padding-content in variables.less when the max-width layout
	// becomes the default layout since the value is different between legacy and
	// latest.
	@padding-content: 1.25em 0.5em 1.5em 0.5em;
	// We want ~60px of space between the end of the sidebar and the start of the
	// content container for aesthetic reasons. The sidebar is already displaced
	// -30px so we simply add 30px of space to the width of the sidebar.
	@margin-start-content: @width-grid-column-one + unit( 8px / @font-size-browser, em );
	// Page container's total horizontal padding in em units.
	@padding-horizontal-page-container-total: 2 * unit( @padding-horizontal-page-container / @font-size-browser, em );
	// Equivalent to 1432px. This determines the maximum width breakpoint at which
	// the content will have a fixed start margin applied to it when the sidebar
	// is open. The content can shift its position when the sidebar is open/closed
	// at or below this breakpoint and will maintain its position above this
	// breakpoint.
	@max-width-margin-start-content: ( 2 * @margin-start-content ) + @padding-horizontal-page-container-total + ( unit( @max-width-content-container / @font-size-browser, em ) );
	@border-color-sidebar: @background-color-secondary--modern;

	// Style overrides for existing elements. Mostly overrides layout.less rules.
	background-color: @background-color-secondary--modern;

	.mw-body {
		border-left: 0;
		border-bottom: 0;
		padding: @padding-content;
	}

	.parsoid-body {
		padding: @padding-content;
	}

	.mw-header {
		padding-left: 0;
		padding-right: 0;
	}

	.mw-body,
	#mw-data-after-content,
	#left-navigation,
	.mw-footer {
		margin-left: 0;
	}

	&.skin-vector-search-header-legacy #mw-head {
		width: auto;
		left: 0;
		right: 0;
	}

	&.skin-vector-search-header-legacy #left-navigation {
		margin-top: 0;
		margin-bottom: 0;
	}

	&.skin-vector-search-header-legacy #right-navigation {
		margin-top: 0;
	}

	&.skin-vector-search-header-legacy #p-personal {
		right: 0;
	}

	&.skin-vector-search-header-legacy #p-search {
		margin-right: 0;
	}

	#p-namespaces {
		background-image: none;
		padding-left: 0;
	}

	#mw-panel {
		background-image: linear-gradient( to bottom, @background-color-base 0%, @background-color-secondary--modern 10%, @background-color-secondary--modern 90%, @background-color-base 100% );
		// Sidebar is displaced from the workspace container so that the
		// sidebar is flush with the edge of the screen at small widths.
		left: -@padding-horizontal-page-container;
		margin-top: 0;
		// To avoid the white part of the gradient colliding with the sidebar links
		// we apply top and bottom padding.
		padding-top: 8px;
		padding-bottom: 40px;
		// Adjust the left position of the sidebar to align it with the sidebar menu button,
		// in the header, while ensuring the background gradient still extends to the edge of the screen.
		// note: the 1px comes from the transparent border of the sidebar button
		padding-left: @margin-horizontal-sidebar-button-icon + @border-width-base;
	}

	.mw-footer {
		border-top: @border-base;
		padding: 32px 0 0 0;
	}

	// Container logic.
	.mw-page-container {
		// Set a min-width to make explicit we do not support anything below this threshold.
		// For devices too small, they should be more useable with horizontal scrolling.
		// e.g. Portrait on an iPad
		min-width: @min-width-supported;
		max-width: @max-width-page-container;
		// Fill the viewport even if the content height is small. This also helps
		// mitigate a long sidebar overflowing the page container (T257518).
		min-height: 100%;
		margin-left: auto;
		margin-right: auto;
		padding: 0 @padding-horizontal-page-container;
		background-color: @background-color-page-container;
	}

	&.skin-vector-search-header .mw-page-container {
		// Establish a new block formatting context to prevent header top margin
		// collapsing and causing whitespace to appear between the header and
		// viewport.
		overflow-y: auto;
	}

	// Used as a container for absolutely positioned elements.
	.mw-page-container-inner {
		position: relative;
	}

	.mw-workspace-container {
		max-width: @max-width-workspace-container;
		margin-left: auto;
		margin-right: auto;
	}

	&.skin-vector-search-header .mw-workspace-container {
		// The sidebar is absolutely positioned relative to the
		// mw-workspace-container.
		position: relative;
	}

	.mw-content-container {
		max-width: @max-width-content-container;
		margin-left: auto;
		margin-right: auto;
	}

	&.skin-vector-search-header-legacy .mw-article-toolbar-container {
		margin-top: @height-header;
	}

	&.skin-vector-search-header .mw-article-toolbar-container {
		// We want to keep the max-width of the article-toolbar-container the
		// same max-width as the article page's content container in order to
		// prevent it from moving when going from an article page to a
		// history/special page.
		max-width: @max-width-content-container;
		margin-left: auto;
		margin-right: auto;
	}

	.mw-sidebar-container {
		position: absolute;
		top: 0;
		left: 0;
		right: 0;
	}

	.mw-footer-container {
		padding-top: 50px;
		padding-bottom: 82px;
	}

	// For container logic specific to special pages and history pages.
	&.action-history,
	&.ns-special {
		// Allow the max-width of content on history/special pages to be wider than
		// the max-width of content on article pages.
		.mw-content-container {
			max-width: none;
		}

		// We want to keep the max-width of the article-toolbar-container the
		// same max-width as the article page's content container in order to
		// prevent it from moving when going from an article page to a
		// history/special page.
		&.skin-vector-search-header-legacy .mw-article-toolbar-container {
			max-width: @max-width-content-container;
		}

		// Adjusts the content when sidebar is open regardless of the viewport width.
		.mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-content-container {
			margin-left: @margin-start-content;
		}
	}

	// We want it to appear like the sidebar is going into/coming out of
	// `.mw-page-container`, but we can't use `overflow: hidden` on
	// `.mw-page-container` because that will cut off the sidebar. Therefore, we
	// calculate the maximum distance from the start of `mw-page-container` to the
	// start of the sidebar.
	&.skin-vector-search-header-legacy #mw-sidebar-checkbox:not( :checked ) ~ .mw-header .mw-sidebar,
	&.skin-vector-search-header #mw-sidebar-checkbox:not( :checked ) ~ .mw-workspace-container .mw-sidebar {
		.transform( translateX( -( @max-width-page-container - @max-width-workspace-container ) / 2 ) );
	}

	// Responsive overrides.
	@media ( min-width: @min-width-page-container--padded ) {
		@border-color: @border-color-sidebar;

		.mw-page-container {
			border-left: 1px solid @border-color;
			border-right: 1px solid @border-color;
		}
	}

	@media ( max-width: @max-width-margin-start-content ) {
		// Adjusts the content and mw-article-toolbar-container.
		.mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-content-container,
		&.skin-vector-search-header-legacy .mw-checkbox-hack-checkbox:checked ~ #mw-navigation .mw-content-container,
		&.skin-vector-search-header .mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-article-toolbar-container {
			margin-left: @margin-start-content;
		}

		.mw-sidebar {
			// Remove sidebar transition at smaller widths.
			.transition( none );
		}
	}

	@media ( min-width: ( @max-width-workspace-container + ( 2 * @padding-horizontal-page-container ) ) ) {
		#mw-panel {
			background: @background-color-page-container;
			border-right: 1px solid @border-color-sidebar;
		}
	}
}