@import '../../common/variables.less';
@import 'mediawiki.mixins.less';
@import '../layouts/screen.less';
@import './checkboxHack.less';

// T305069 Layout adjustments of sidebar elements:
// Vertically align the left edge of sidebar elements with the visible edge of the sidebar toggle hamburger menu.
@margin-start-sidebar-content: unit( 12px / @font-size-browser, em ); // 0.75em @ 16
// Default spacing separating the sidebar TOC from the main menu or viewport.
@margin-top-sidebar-toc: 1.5em;

// Update styling to account for TOC.
.mw-sidebar,
.sidebar-toc,
.sidebar-toc:after {
	// Match styles between TOC and fade element to ensure the fade covers the correct area
	// This is expressed in pixels to support different font sizes since our layout is currently
	// expressed in pixels. See T313817.
	width: @width-sidebar-px;
	margin-left: 0;

	@media ( min-width: @min-width-desktop-wide ) {
		width: @width-sidebar-px-wide;
		margin-left: @margin-start-sidebar-content;
	}
}

.sidebar-toc,
.sidebar-toc:after {
	margin-left: -@margin-start-sidebar-content;
	// Use margin-top to align TOC rather than grid row gap
	// Applies when the TOC sticky and when the main menu is both open and closed.
	margin-top: @margin-top-sidebar-toc;

	@media ( min-width: @min-width-desktop-wide ) {
		margin-left: 0;
	}
}

.mw-sidebar {
	box-sizing: border-box;
	// Temporary magic number, will be calculated after TOC specs are finalized
	padding: 12px 19px 12px 9px;
	background-image: none;
	background-color: @background-color-secondary--modern;

	@media ( min-width: @min-width-desktop ) {
		// Prevent grid row gap from affecting TOC spacing when main menu is open
		margin-bottom: -@grid-row-gap;
	}

	@media ( max-width: @max-width-tablet ) {
		// Makes the sidebar full screen at lower resolutions.
		width: 100%;
	}

	// Hide sidebar entirely when the checkbox is disabled
	#mw-sidebar-checkbox:not( :checked ) ~ .vector-sidebar-container & {
		display: none;
	}

	// Hide #p-navigation label
	#p-navigation .vector-menu-heading {
		display: none;
	}
}

.mw-sidebar-action {
	// Align with the portal heading/links
	// `.portal` + `.portal .body`
	margin: 8px @margin-end-portal 8px @margin-start-portal + @margin-start-portal-body;

	// Styles for SidebarAction template.
	.mw-sidebar-action-item {
		h3.mw-sidebar-action-heading {
			display: block;
			background-image: linear-gradient( to right, @border-color-portal-heading-transparent 0, @border-color-portal-heading 33%, @border-color-portal-heading 66%, @border-color-portal-heading-transparent 100% ); // Standard (Firefox 16+, IE 10+, Safari 6.1+, Chrome 26+)
			background-position: center bottom;
			background-repeat: no-repeat;
			background-size: 100% @border-width-base;
			color: @color-base--subtle;
			margin: 0.75em 0;
			border: 0;
			padding: 0.3em 0;
			font-size: @font-size-nav-main-heading;
			font-weight: normal;
			cursor: default;
		}

		.mw-sidebar-action-content {
			> * {
				font-size: @font-size-portal-list-item;
			}

			> a {
				font-weight: bold;
			}
		}

		// T295555 style overrides for temporary language switch alert (can be removed later ).
		.vector-language-sidebar-alert {
			padding: 0.75em;
		}
	}
}

#mw-sidebar-button {
	&:before {
		// Equals `#555`, closest to `#54595d` on background-color `#fff`.
		opacity: 0.67;
		/* @embed */
		background-image: url( images/chevronHorizontal-ltr.svg );

		#mw-sidebar-checkbox:not( :checked ) ~ .mw-header & {
			/* @embed */
			background-image: url( images/menu.svg );
		}
	}

	&:hover {
		&:before {
			opacity: 1;
		}
	}
}