style.css

/*
Theme Name: Twenty Twenty-Four
Theme URI: https://wordpress.org/themes/twentytwentyfour
Author: the WordPress team
Author URI: https://wordpress.org
Description: Twenty Twenty-Four is a simple theme that supports full-site editing. It comes with a set of minimal templates and design settings that can be manipulated through Global Styles. Use it to build something beautiful.
Requires at least: 6.0
Tested up to: 6.4
Requires PHP: 7.0
Version: 1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: twentytwentyfour
Tags: one-column, custom-colors, custom-menu, custom-logo, editor-style, featured-images, full-site-editing, block-patterns, rtl-language-support, sticky-post, threaded-comments, translation-ready, wide-blocks, block-styles, style-variations, accessibility-ready, blog, portfolio, news
*/

/*
 * Control the hover stylings of outline block style.
 * Unnecessary once block styles are configurable via theme.json
 * https://github.com/WordPress/gutenberg/issues/42794
 */
.wp-block-button.is-style-outline>.wp-block-button__link:not(.has-background):hover {
	background-color: var(--wp--preset--color--contrast-2);
	color: var(--wp--preset--color--base);
	border-color: var(--wp--preset--color--contrast-2);
}

/*
 * Link styles
 * https://github.com/WordPress/gutenberg/issues/42319
 */
a {
	text-decoration-thickness: .0625em !important;
	text-underline-offset: .15em;
}

/*
 * Styles for the custom Faq arrow details block style
 * https://github.com/WordPress/twentytwentyfour/issues/46
 */

.is-style-arrow-icon-details  {
	padding-top: var(--wp--preset--spacing--10);
	padding-bottom: var(--wp--preset--spacing--10);
	border-bottom: 1px solid rgba(255, 255, 255, 0.20);
}

.is-style-arrow-icon-details summary {
    list-style-type: '\2193\00a0\00a0\00a0';
}

.is-style-arrow-icon-details[open] > summary {
	list-style-type: '\2192\00a0\00a0\00a0';
}