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

.mw-table-of-contents-container {
	// Needed for Grid-based layout
	align-self: start;
	height: 100%;
}

@media ( min-width: @min-width-desktop ) {
	&.vector-feature-toc-pinned-clientpref-1 #mw-panel-toc {
		// Support: Chrome
		// Work around sticky-positioned layers disabling subpixel text rendering (T327460).
		// NOTE: This property has an effect similar to 'overflow: hidden', and will prevent elements
		// inside of the panel from being rendered outside of its bounding box, even when they would
		// be positioned there using absolute positioning, negative margin, transforms, etc.
		// That's why the negative margins have to be applied here, instead of on #vector-toc.
		contain: paint;
		// Align the left edge of the TOC text with the page container
		margin-left: -@spacing-subsection-toggle;
	}

	#vector-toc-pinned-container {
		position: sticky;
		top: 0;
	}

	&.vector-feature-toc-pinned-clientpref-1 #vector-toc-pinned-container {
		// Default spacing separating the sidebar TOC from the main menu.
		margin-top: 1.5em;
	}

	// FIXME: Remove vector-feature-toc-pinned-(enabled|disabled) when cache allows.
	&.vector-feature-main-menu-pinned-disabled.vector-feature-toc-pinned-clientpref-1 #vector-toc-pinned-container,
	&.vector-feature-main-menu-pinned-disabled.vector-feature-toc-pinned-enabled #vector-toc-pinned-container {
		// Align TOC with bottom of title when main menu is not pinned but the TOC is
		margin-top: @margin-top-pinned-toc;
	}

	// T302076: Add fade scrollable indicator when TOC is in sidebar
	// Avoid showing indicator when the TOC is floating, or collapsed in the page title/sticky header
	#vector-toc-pinned-container .vector-toc {
		max-height: ~'calc( 100vh - @{max-height-bottom-spacing-scroll-indicator} )';
		padding-top: @padding-top-pinned-element;
		padding-left: @spacing-subsection-toggle;
		padding-right: @padding-horizontal-dropdown-menu-item;
		.mixin-vector-scroll-indicator();
	}
}