/*
 * What you're currently looking at is the source code of a legally protected, proprietary software.
 * CKEditor 5 Collaboration is licensed under a commercial license and protected by copyright law. Where not otherwise indicated,
 * all CKEditor 5 Collaboration content is authored by CKSource engineers and consists of CKSource-owned intellectual property.
 *
 * Copyright (c) 2003-2025, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
 */

:root {
	--ck-document-outline-padding: var(--ck-spacing-large);
	--ck-document-outline-base-font-size: .875em;
	--ck-document-outline-placeholder-color: var(--ck-color-engine-placeholder-text);

	--ck-document-outline-indent-level-1: 0;
	--ck-document-outline-indent-level-2: 1.5em;
	--ck-document-outline-indent-level-3: 3em;
	--ck-document-outline-indent-level-4: 4.5em;
	--ck-document-outline-indent-level-5: 6em;
	--ck-document-outline-indent-level-6: 7.5em;

	--ck-document-outline-item-padding: var(--ck-spacing-small);
	--ck-document-outline-item-active-color: var(--ck-color-base-active);
	--ck-document-outline-item-default-color: hsl(0, 0%, 26%);
	--ck-document-outline-item-hover-state-color: var(--ck-color-base-text);
}

.ck.ck-document-outline {
	padding: var(--ck-document-outline-padding);
	font-size: var(--ck-document-outline-base-font-size);
	user-select: none;

	&:empty::before {
		content: attr(data-document-outline-empty-placeholder);
		display: inline-block;
		color: var(--ck-document-outline-placeholder-color);
	}

	& .ck-document-outline__item {
		padding: var(--ck-document-outline-item-padding);
		color: var(--ck-document-outline-item-default-color);
		white-space: nowrap;
		text-overflow: ellipsis;
		overflow: hidden;
		cursor: pointer;

		&.ck-document-outline__item_empty {
			font-style: italic;
		}

		&.ck-document-outline__item_empty:hover,
		&:hover {
			color: var(--ck-document-outline-item-hover-state-color);
			text-decoration: underline;
		}

		&.ck-document-outline__item_active {
			color: var(--ck-document-outline-item-active-color);
		}

		&.ck-document-outline__item_level-1 {
			font-size: 1.1em;
			font-weight: bold;
		}
	}

	&[dir="ltr"] {
		& .ck-document-outline__item {
			@mixin document-outline-level-indents padding-left;
		}
	}

	&[dir="rtl"] {
		& .ck-document-outline__item {
			@mixin document-outline-level-indents padding-right;
		}
	}
}

@define-mixin document-outline-level-indents $padding-property {
	&.ck-document-outline__item_level-1 {
		$(padding-property): var(--ck-document-outline-indent-level-1);
	}

	&.ck-document-outline__item_level-2 {
		$(padding-property): var(--ck-document-outline-indent-level-2);
	}

	&.ck-document-outline__item_level-3 {
		$(padding-property): var(--ck-document-outline-indent-level-3);
	}

	&.ck-document-outline__item_level-4 {
		$(padding-property): var(--ck-document-outline-indent-level-4);
	}

	&.ck-document-outline__item_level-5 {
		$(padding-property): var(--ck-document-outline-indent-level-5);
	}

	&.ck-document-outline__item_level-6 {
		$(padding-property): var(--ck-document-outline-indent-level-6);
	}
}