WP File Manager

Name	Action
..
block.json	Edit
editor-rtl.css	Edit
editor-rtl.min.css	Edit
editor.css	Edit
editor.min.css	Edit
style-rtl.css	Edit
style-rtl.min.css	Edit
style.css	Edit
style.min.css	Edit

Editing: style.css

.wp-block-navigation .wp-block-page-list{ align-items:var(--navigation-layout-align, initial); background-color:inherit; display:flex; flex-direction:var(--navigation-layout-direction, initial); flex-wrap:var(--navigation-layout-wrap, wrap); justify-content:var(--navigation-layout-justify, initial); } .wp-block-navigation .wp-block-navigation-item{ background-color:inherit; }