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
theme-rtl.css	Edit
theme-rtl.min.css	Edit
theme.css	Edit
theme.min.css	Edit

Editing: style-rtl.min.css

.wp-block-audio{box-sizing:border-box}.wp-block-audio :where(figcaption){margin-bottom:1em;margin-top:.5em}.wp-block-audio audio{min-width:300px;width:100%}