zulip.css

/* less intrusive [over]quoting */
div.message_content blockquote {
    border-left-width: 2px;
}
div.message_content:not(:hover) > blockquote > blockquote p:last-of-type {
    opacity: 0.5;
}

/* faster spoilers */
div.spoiler-content, span.spoiler-arrow {
    transition-duration: 0.1s !important;
}

/* lighter /me */
span.sender-status {
    opacity: 0.9;
}
span.sender_name-in-status {
    font-weight: normal;
}

/* badly cropped avatars */
body.night-mode div.inline_profile_picture > img {
    /* todo: recolor white borders? */
}

/* hide unsubscribed users instead of fading (#10208) */
li.user-fade {
    display: none;
}

/* larger compose message box */
textarea.new_message_textarea {
    min-height: 5em !important
}

/* replace mark of edited message */
div.message_edit_notice {
    visibility: hidden;    
}
div.message_edit_notice:before {
    font-family: "FontAwesome";
    content: "(\f040)";
    visibility: visible;
}