// This assumes the presence of variables inside layout.less. DO NOT import it separately.
// Assumes various variables defined there.

@min-width-search: unit( 350px / @font-size-browser, em );
@max-width-search: unit( 580px / @font-size-browser, em );

// The logo is variable width but typically consists of:
// - a icon (50x50)
// - a wordmark (approx 120px)
@min-width-logo: unit( 170px / @font-size-browser, em );

@min-width-personal-tools: @max-width-search;

@padding-horizontal-page-container: 30px;
@padding-horizontal-page-container-ems: unit( @padding-horizontal-page-container / @font-size-browser, em );

@min-width-supported: @width-grid-column-one + @min-width-personal-tools +  ( @padding-horizontal-page-container-ems * 2 );
@width-comfortable: @min-width-logo + @size-sidebar-button + @max-width-search + @min-width-personal-tools;

@height-personal-tools: 2em;

.skin-vector-search-header {

	// Header components
	#p-search {
		// Override values to reflect new behaviour.
		min-width: @min-width-search;
		max-width: @max-width-search;
		margin: 0 40px;
	}

	// Support IE9: float will be disabled if display flex is supported
	#p-search,
	#mw-sidebar-button {
		float: left;
	}

	#p-personal {
		text-align: right;

		// Support IE9: This is reset in @support query below if Flexbox is available.
		float: right;
	}

	// If we don't have the space adjust header.
	// Increase height and margins to accommodate personal tools underneath.
	@media ( max-width: @width-comfortable ) {
		@height-header-adjusted: @height-header + @height-personal-tools;

		#mw-panel {
			top: @height-header-adjusted - @margin-top-header;
		}

		.mw-header-placeholder {
			height: @height-header-adjusted + @height-tabs;
		}

		#left-navigation {
			margin-top: @height-header-adjusted;
			margin-bottom: 0;
		}

		#right-navigation {
			margin-top: -@height-tabs;
			clear: left;
		}
	}
}

// when max-width is also enabled...
.skin-vector-search-header.skin-vector-max-width {
	#left-navigation {
		margin-top: 0;
	}

	.mw-article-toolbar-container {
		margin-top: @height-header + @height-personal-tools;
	}

	@media ( min-width: @width-comfortable ) {
		.mw-article-toolbar-container {
			margin-top: @height-header;
		}
	}
}

// If flexbox supported reset the floats that are supporting IE9
// When IE9 is no longer supported this entire query can be dropped.
@supports ( display: flex ) {
	.skin-vector-search-header {
		.mw-header {
			flex-wrap: wrap;
		}

		#p-personal,
		#p-search {
			flex-grow: 1;
			// Disable the float: left rule for IE9 support
			float: none;
		}

		#mw-sidebar-button {
			// Disable the float: left rule for IE9 support
			float: none;
		}
	}
}