Mastodon Media Description Checker by MagicLike

/* ==UserStyle==
@name           Mastodon Media Description Checker
@namespace      MagicLike
@version        1.0
@description    A small CSS snippet that adds a red border to the media of a post if there is no description.
@author         MagicLike <contact@magiclike.net> (https://magiclike.net), GunChleoc, Mayana, duncan, Curator
@homepageURL    https://codeberg.org/MagicLike/Mastodon-Media-Description-Checker
@supportURL     https://codeberg.org/MagicLike/Mastodon-Media-Description-Checker/issues
@license        MIT
==/UserStyle== */

@-moz-document domain("mstdn.social"),
domain("masto.ai"),
domain("mastodon.social"),
domain("mastodon.online"),
domain("mastodon.coffee"),
domain("brands.town"),
domain("social.vivaldi.net"),
domain("mastodon.art"),
domain("tech.lgbt"),
domain("mastodon.lol"),
domain("floss.social"),
domain("mas.to"),
domain("fosstodon.org"),
domain("meow.social"),
domain("indieweb.social"),
domain("catcatnya.com"),
domain("mastodon.scot"),
domain("astronomy.social"),
domain("octodon.social"),
domain("hessen.social"),
domain("chaos.social"),
domain("tilde.zone"),
domain("troet.cafe"),
domain("norden.social"),
domain("mastodon.world"),
domain("infosec.exchange"),
domain("mastodon.xyz"),
domain("social.tchncs.de"),
domain("ieji.de"),
url-prefix("mstdn"),
url-prefix("masto"),
url-prefix("mastodon") {

    .media-gallery__item-thumbnail img:not([alt]),
    .audio-player__canvas:not([title]),
    .video-player video:not([title]),
    .media-gallery__gifv video:not([title]) {
        content: "Media has no description";
        border: 4px dashed red;
        box-sizing: border-box;
    }
}