plone.app.discussion/plone/app/discussion/browser/stylesheets/discussion.css

/* plone.app.discussion stylesheet */

.discussion .hide {
    display: none;
}


/* Comments Viewlet
   -------------------------------------------------------------------------- */

.discussion,
#commenting {
    /* Clear "float: left" from "manage portlets" div above the
       comment viewlet. This will get fixed in the next Plone 4 
       release. */
    clear: both;
}

.comment {
}

.commentImage {
    float: left;
    margin-right: 0.5em;
    height: 3.5em;
}

.commentImage a:link {
    /* Override the default bottom border of links in Plone 4. */
    border: 0px;
}

.commentImage img {

}

.commentDate {
    display: block;
    font-size: 85%;
    line-height: 1.5em;
    padding-top: 0.5em;
    color: #76797C;
}

.commentBody {
    clear: both;
    margin: 1em 0;
    overflow: auto;
}

.commentBody p {
    float: left;
 }

.discussion .documentByLine {
    float: left;
    margin-left: 0;
	margin-bottom: 0.5em;
}

.commentActions {
    float: right;
    text-align: right;
}

.discussion .discreet {
    color: #666666;
    font-size: 85%;    
}

/* Reply Form
   -------------------------------------------------------------------------- */

.reply fieldset {
    /* Fix bouncing fieldset when reply form is shown. */
    margin: 0 !important;
}

.reply .text-widget {
    /* Make sure the input fields are always below the label. This sometimes
     * break when the reply form is copied from the main comment form. 
     */
    display: block;
}

.reply-to-comment-button {
   /* Hide the reply-to-comment button and show it only if Javascript
    * is enabled. Since the reply functions rely on jQuery.
    */
    display: none;
}

.cancelreplytocomment {
    /* Hide the cancel button in the comment form, show it only in the reply form
     * in order to close it.
     */
    display: none;
}


/* Moderation View
   -------------------------------------------------------------------------- */

#bulkactions {
    text-align: left;
}

#dobulkaction {
    margin: 0.3em 0;
}

.comment-publish-button {
    float: left;
    margin-right: 0.5em;
}

.comment-delete-button {
    float: left;
}

#review-comments {
    margin: 0;
}

#fieldset-moderate-comments {
    padding: 2em 1em;
}

/* Discussion Control Panel
   -------------------------------------------------------------------------- */

.template-discussion-settings .unclickable {
    opacity: 0.6;
    filter: alpha(opacity = 50);
}

/* Plone 4 Styles
   -------------------------------------------------------------------------- */

/* These styles are only applied for Plone 4, since Plone 3.x does 
    not have a .row class for portal-column-content. */

.row #dobulkaction {
    margin: 0;
}

.row #commenting {
    font-size: 80%;
}

.row #commenting .formControls {
    margin: 0;
}

.row #commenting textarea,
.row .discussion textarea {
    font: 100% Monaco, "Courier New", Courier, monospace;
    width: 100%;
}

.row #commenting fieldset,
.row .discussion fieldset {
    border: 0.1em solid #329fd7;
    border-style: solid none none none;
}

.row #commenting legend,
.row .discussion legend {
    padding: 0.5em 0.5em 0.5em 0;
    font-size: 85%;
}

.row #commenting label,
.row .discussion label {
    font-weight:bold;
}