/**
 * Vector modern layout styles for screen
 *
 * Layout rules divide the page into sections and how VectorComponents should be arranged in the skin.
 * The rules here should only define the layout, not color or typography.
 */

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

// Sidebar
@width-grid-column-one: 11em;

// Menu button
@margin-horizontal-sidebar-button-icon: unit( 12px / @font-size-browser, em); // 0.75em @ 16

// 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-sidebar:
	@margin-horizontal-sidebar-button-icon +
	unit( @border-width-base / @font-size-browser, em );

// Layout containers

// Page container

@min-width-page-container--padded: @max-width-page-container + ( 2 * @padding-horizontal-page-container ); // 106.875em

// Content containers

@max-width-workspace-container: unit( 1440px / @font-size-browser, em ); // 90em @ 16
@max-width-content-container: unit( 960px / @font-size-browser, em ); // 60em @ 16

// Note this uses variables defined in mediawiki.skin.variables so that VisualEditor can read them
// see T259331.
@padding-content: @padding-top-content @padding-horizontal-content 1.5em;
// 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 ); // 11.5em @ 16
// Ensure there's enough space between the TOC and content container
@margin-toc-start-content: 16em;

// Tabs

@height-tabs: 2.5em; // Keep in sync with .vector-menu-tabs height.

// Breakpoints

// 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 ) +
	( 2 * @padding-horizontal-page-container ) +
	@max-width-content-container;
// 23em + 3.75em + 60em = 86.75em @ 16

// Defines the minimum viewport width, at which point the layout will not get any
// smaller and will start horizontal scrolling instead.
@min-width-supported:
	unit( 500px / @font-size-browser, em ) -
	( 2 * @padding-horizontal-page-container );
// 31.25em - 3.75em = 27.5em @ 16
@border-color-sidebar: @background-color-secondary--modern;
@background-color-secondary--modern: #f8f9fa;
@background-color-page-container: @background-color-base;

body {
	background-color: @background-color-secondary--modern;
	color: @color-base;
	// Vertical scrollbar always visible.
	overflow-y: scroll;
}

.mw-body,
.parsoid-body {
	direction: ltr;
	padding: @padding-content;
}

.mw-body {
	border-top: @border-width-base @border-style-base @border-color-content;
	/* Merge the border with tabs' one (in their background image) */
	margin-top: -@border-width-base;
	padding: @padding-content;

	.firstHeading {
		/* Change the default from mediawiki.skinning CSS to let indicators float into heading area */
		overflow: visible;
	}
}

.mw-header {
	// allow z-index to apply so search results overlay article
	position: relative;
	z-index: @z-index-header;
}

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

/* Content */
.mw-indicators {
	z-index: @z-index-indicators;
}

.mw-body-header {
	.mixin-clearfix();
}

// TODO: Can be changed to `.mw-body .mw-portlet-lang` when language-in-header feature is default.
.mw-body #p-lang-btn {
	float: right;
}

.vector-body {
	position: relative;
	z-index: @z-index-base;
}

/* Navigation Containers */
.mw-article-toolbar-container {
	// Clear the floats on #left-navigation and #right-navigation.
	.mixin-clearfix();
	// 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;
}

#left-navigation {
	float: left;
}

#right-navigation {
	float: right;

	// Any dropdowns inside the right navigation in modern Vector (e.g. "more" menu).
	// should be right-aligned to prevent horizontal scrolling.
	.vector-menu-content {
		left: auto;
		right: -@border-width-base;
	}
}

#mw-sidebar-button {
	float: left; // Browser: IE9 support - button as flex-child fallback.
	margin-left: -@margin-horizontal-sidebar-button-icon;
	margin-right: @margin-horizontal-sidebar-button-icon; // Accidentally the same.
}

#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% );
	position: absolute;
	// 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;
	width: @width-grid-column-one;
	.box-sizing( border-box );
	// To avoid the white part of the gradient colliding with the sidebar links
	// we apply top and bottom padding.
	padding: 8px 0 40px @padding-left-sidebar;
	z-index: @z-index-sidebar;
}

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

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

.mw-footer {
	border-top: @border-base;
	padding: 0.75em;
}

// Container logic.
.mw-page-container {
	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;
	// Use non-zero padding to disable margin collapse.
	// Be careful not to use overflow-y: scroll here (see T270146 and T271868)
	padding: 0.05px ( @padding-horizontal-page-container / 2 );
	background-color: @background-color-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;
}

.skin--responsive .mw-page-container {
	min-width: 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;
	// The sidebar is absolutely positioned relative to the
	// mw-workspace-container.
	position: relative;

	&.mw-footer-container {
		// T264679: There are elements (e.g. discussion tool popovers) in the main
		// content container that we want to appear on top of the footer. We set the
		// footer container to have static positioning instead of relative
		// positioning (applied by .mw-workspace-container) to enable this.
		position: static;
	}
}

.mw-content-container {
	display: flow-root;
	max-width: @max-width-content-container;
	margin-left: auto;
	margin-right: auto;

	// For container logic specific to special pages and history pages.
	.skin-vector-disable-max-width & {
		// Allow the max-width of content on history/special pages to be wider than
		// the max-width of content on article pages.
		// Note, we don't disable the max-width on .mw-article-toolbar-container intentionally
		// to support easier navigation between tabs.
		// See T293441 for further information on that.
		max-width: none;
	}
}

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

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

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

// Adjusts the content when sidebar is open regardless of the viewport width.
.mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-content-container {
	// For container logic specific to special pages and history pages.
	.skin-vector-disable-max-width & {
		margin-left: @margin-start-content;
	}
}

// Increase margin when TOC is enabled
.vector-toc-enabled .mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-content-container {
	.skin-vector-disable-max-width & {
		margin-left: @margin-toc-start-content;
	}
}

@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,
	.mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-article-toolbar-container {
		margin-left: @margin-start-content;
	}

	// Increase margin when TOC is enabled
	.vector-toc-enabled .mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-content-container,
	.vector-toc-enabled .mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-article-toolbar-container {
		margin-left: @margin-toc-start-content;
	}

	// Specificity needed to disable the default animations at lower resolutions.
	.vector-animations-ready .mw-sidebar {
		// Remove sidebar transition at smaller widths.
		.transition( none );
	}
}

// Update article page's content container when
// TOC is visible and when TOC is enabled and the sidebar is open
.vector-toc-visible .mw-workspace-container .mw-content-container,
.vector-toc-visible .mw-workspace-container .mw-article-toolbar-container,
.vector-toc-enabled .mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-content-container,
.vector-toc-enabled .mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container .mw-article-toolbar-container {
	// Use !important to override checkbox status dependent styles applied above
	margin-left: @margin-toc-start-content !important; /* stylelint-disable-line declaration-no-important */
}

// Prevent center align when TOC is visible
.vector-toc-visible .mw-workspace-container {
	margin-left: initial;
}

@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;
	}
}

@media ( min-width: @width-breakpoint-desktop ) {
	.mw-page-container {
		padding-left: @padding-horizontal-page-container;
		padding-right: @padding-horizontal-page-container;
	}
}

/**
 * Makes the sidebar full screen at lower resolutions.
 */
@media ( max-width: @width-breakpoint-tablet ) {
	.mw-checkbox-hack-checkbox:checked ~ .mw-workspace-container {
		#mw-panel {
			width: 100%;
			position: relative;
			left: 0;
		}

		// !important as we always want to disable the margin-left on these elements
		// Using !important is cleaner than having to rely on specificity involved :checked elements
		.mw-content-container,
		.mw-article-toolbar-container {
			// stylelint-disable-next-line declaration-no-important
			margin-left: 0 !important;
		}
	}
}