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

// Header sizes defined in the description of T246170 and comment T246170#5957100
@padding-vertical-header: 0.125em;
@margin-top-header: 0.625em;
@margin-bottom-header: 0.3125em;

// Logo sizes per specification in T245190.
@height-logo-icon: 3.125em;

// Canonical version of spec: T270202
@min-width-search: unit( 150px / @font-size-browser / @font-size-base, em ); // 10.71428571em @ 16 & 0.875em
@min-width-search-desktop: unit( 350px / @font-size-browser / @font-size-base, em ); // 25em @ 16 & 0.875em
@max-width-search: unit( 500px / @font-size-browser / @font-size-base, em ); // 35.71428571em @ 16 & 0.875em

.mw-header {
	// A min-height is set to account for projects where no icon is set.
	min-height: @height-logo-icon;
	margin: @margin-top-header 0 @margin-bottom-header;
	padding: @padding-vertical-header 0;
	// Vertical centering of header elements (IE>=11), requires flex.
	// Non-flex fallback for IE<=9: float rule on the child elements.
	.flex-display();
	flex-wrap: nowrap;
	// https://caniuse.com/#search=align-items
	align-items: center;

	.vector-search-box {
		float: left;
		z-index: @z-index-menu;
		flex-grow: 1;
	}

	// Allocate space for the extra width of the input when the search component
	// has thumbnails.
	//
	// FIXME: This can be removed when WVUI in core has been upgraded to use the
	// `.wvui-typeahead-search--auto-expand-width` class.
	.wvui-typeahead-search--show-thumbnail:not( .wvui-typeahead-search--auto-expand-width ) {
		margin-left: @size-search-expand;
	}

	@media ( min-width: @width-breakpoint-desktop ) {
		@margin-start-search: 40px;

		.vector-search-box {
			margin-left: unit( @margin-start-search / @font-size-browser / @font-size-base, em ); // 2.85714286em @ 16 & 0.875em
			margin-right: @margin-end-search;

			// Support: IE 8, Firefox 18-, Chrome 19-, Safari 5.1-, Opera 19-, Android 4.4.4-.
			width: 13.2em;
			// Support: Modern browsers, responsive width.
			width: 20vw;
			max-width: 100%;
			min-width: @min-width-search-desktop;
			flex-basis: @min-width-search;

			> div {
				max-width: @max-width-search;
			}

			&.vector-search-box-show-thumbnail {
				margin-left: unit( ( @margin-start-search - @size-search-expand ) / @font-size-browser / @font-size-base, em ); // 1.14285714em @ 16 & 0.875em

				> div {
					max-width: @max-width-search + unit( @size-search-expand / @font-size-browser / @font-size-base, em ); // 37.42857143em @ 16 & 0.875em
				}
			}
		}
	}

	/**
	 * Toggles the visibility of the search box at lower resolutions.
	 */
	@media ( max-width: @width-breakpoint-desktop ) {
		&.vector-header-search-toggled {
			#mw-sidebar-button,
			.mw-logo,
			.search-toggle {
				display: none;
			}

			.vector-search-box-collapses > div {
				display: block;
			}

			.vector-search-box {
				// T284242#7206507: Widen the suggestion results to the edge of the search
				// button at small resolutions.
				position: relative;
				margin-left: @padding-horizontal-tabs;
				margin-right: @margin-end-search;
			}

			.wvui-typeahead-search__wrapper {
				position: static;
			}

			// Position the start of suggestion list at the start of the input.
			//
			// FIXME: This can be removed when WVUI in core has been upgraded to use
			// the `.wvui-typeahead-search--auto-expand-width` class.
			.wvui-typeahead-search--show-thumbnail:not( .wvui-typeahead-search--auto-expand-width ) {
				.wvui-typeahead-search__suggestions {
					left: 0;
				}
			}
		}
	}
}