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

.sidebar-toc {
	max-height: 75vh;
	padding: @sidebar-toc-vertical-padding @sidebar-toc-right-padding @sidebar-toc-vertical-padding @sidebar-toc-left-padding;
	box-sizing: border-box;
	overflow-y: auto;
	overflow-x: hidden;
	background-color: @background-color-page-container;

	.vector-feature-page-tools-disabled & .vector-toc-pinnable-header {
		// Override default pinnable header styles
		padding: 0 0 12px 0;
		border: 0;
		line-height: initial;
	}

	.vector-pinnable-header-label {
		// Override heading element styles in elements.less
		overflow: unset;
	}

	.sidebar-toc-numb {
		display: none;
	}

	.sidebar-toc-toggle {
		// For no-js users, toggling is disabled and icon is hidden
		display: none;
		position: absolute;
		top: 1px; // visually center icon
		left: ~'calc( -1 * @{toc-subsection-toggle-icon-size} - 1px )'; // leaves 6px between icon + text
		width: @toc-subsection-toggle-icon-size; // ~22px @ 12
		height: @toc-subsection-toggle-icon-size;
		font-size: 0.75em; // reduces size of toggle icon to 12px @ 16
		transition: @transition-duration-base;
		color: transparent;
		cursor: pointer;
	}

	.sidebar-toc-link {
		word-break: break-word;
		color: @color-link;
		display: block;
	}

	// Highlight and bold active sections, active top sections that are unexpanded
	// and active top sections that are the only active element.
	.sidebar-toc-list-item-active,
	.sidebar-toc-level-1-active:not( .sidebar-toc-list-item-expanded ),
	.sidebar-toc-list-item-active.sidebar-toc-level-1-active {
		> .sidebar-toc-link {
			// Highlight active section
			color: @color-base;
			font-weight: bold;

			.sidebar-toc-text {
				// Increase width to prevent line wrapping due to bold text
				// Avoid applying on link element to avoid focus indicator changing size
				width: ~'calc( 100% + @{sidebar-toc-right-padding} )';
			}
		}
	}

	// Highlight active top sections that contain an active section
	.sidebar-toc-level-1-active:not( .sidebar-toc-list-item-active ) > .sidebar-toc-link {
		color: @color-base;
	}

	.sidebar-toc-text {
		padding: 4px  0;
	}

	.sidebar-toc-contents,
	.sidebar-toc-list {
		margin: 0;
		list-style: none;
		line-height: 18px;
	}

	.sidebar-toc-list-item {
		display: block;
		position: relative;
		list-style-type: none;
		padding-left: 8px;

		&.sidebar-toc-level-1 {
			padding-left: 0;
		}

		a {
			font-size: @font-size-base;
		}
	}
}

// Collapse ToC sections by default, excluding no-js
.client-js .sidebar-toc {
	.sidebar-toc-level-1 .sidebar-toc-list-item {
		display: none;
	}

	.sidebar-toc-level-1.sidebar-toc-list-item-expanded .sidebar-toc-list-item {
		display: block;
	}

	.sidebar-toc-toggle {
		display: block;
	}

	.sidebar-toc-level-1.sidebar-toc-list-item-expanded .sidebar-toc-toggle {
		transform: rotate( 0deg );
	}
}

.client-js body.ltr .sidebar-toc .sidebar-toc-toggle {
	transform: rotate( -90deg );
}

.client-js body.rtl .sidebar-toc .sidebar-toc-toggle {
	transform: rotate( 90deg );
}