materio-base-d7/modules/forum/forum.css

/**
 * @file
 * Styling for the Forum module.
 */

#forum .description {
  font-size: 0.9em;
  margin: 0.5em;
}
#forum td.created,
#forum td.posts,
#forum td.topics,
#forum td.last-reply,
#forum td.replies,
#forum td.pager {
  white-space: nowrap;
}

#forum td.forum .icon {
  background-image: url(../../misc/forum-icons.png);
  background-repeat: no-repeat;
  float: left; /* LTR */
  height: 24px;
  margin: 0 9px 0 0; /* LTR */
  width: 24px;
}
#forum td.forum .forum-status-new {
  background-position: -24px 0;
}

#forum div.indent {
  margin-left: 20px; /* LTR */
}
#forum .icon div {
  background-image: url(../../misc/forum-icons.png);
  background-repeat: no-repeat;
  width: 24px;
  height: 24px;
}
#forum .icon .topic-status-new {
  background-position: -24px 0;
}
#forum .icon .topic-status-hot {
  background-position: -48px 0;
}
#forum .icon .topic-status-hot-new {
  background-position: -72px 0;
}
#forum .icon .topic-status-sticky {
  background-position: -96px 0;
}
#forum .icon .topic-status-closed {
  background-position: -120px 0;
}