/*
Theme Name: Twenty Twenty-Four Child
Theme URI: http://example.com/twentytwentyfour-child/
Description: Tema Child per Twenty Twenty-Four
Author: Il tuo nome
Template: twentytwentyfour
Version: 1.0
*/
:root :where(.wp-block-post-featured-image img, 
             .wp-block-post-featured-image .block-editor-media-placeholder, 
             .wp-block-post-featured-image .wp-block-post-featured-image__overlay) {
    border-radius: 0!important;; /* O qualunque valore desiderato */
}