framework/extensions/mentions/less/forum.less

.PostMention, .UserMention {
  background: @control-bg;
  color: @control-color;
  border-radius: @border-radius;
  padding: 2px 5px;
  border: 0 !important;
  font-weight: 600;

  blockquote & {
    background: @body-bg;
  }
  &:hover,
  &:active {
    color: @link-color;
  }
}
.UserMention, .PostMention {
  &--deleted {
    opacity: 0.8;
    filter: grayscale(1);
  }
}
.PostMention {
  margin: 0 3px;

  &:first-child {
    margin-left: 0;
  }

  &:before {
    .fa();
    content: @fa-var-reply;
    margin-right: 5px;
  }
}
.ComposerBody-mentionsWrapper {
  position: relative;
}
.MentionsDropdown {
  max-width: 500px;
  max-height: 150px;
  overflow: auto;
  position: absolute;

  mark {
    padding: 0;
  }
  > li > a:hover {
    background: none;
  }
}
.MentionsDropdown, .PostMention-preview, .Post-mentionedBy-preview {
  .PostPreview {
    color: @muted-color;

    .Avatar {
      .Avatar--size(24px);
      margin: 0 0 0 -37px;

      .MentionsDropdown-post& {
        margin-top: 3px;
        margin-bottom: 3px;
      }
    }
    .username {
      color: @text-color;
      font-weight: bold;
    }
  }
  .PostPreview-content {
    padding-left: 37px;
    overflow: hidden;
    line-height: 1.7em;
    display: block;
  }
}
.Post-mentionedBy {
  display: inline-block;
}
.Post-mentionedBy-summary {
  cursor: pointer;
}
.Post-mentionedBy-preview, .PostMention-preview, .MentionsDropdown {
  margin: 5px 0 !important;

  > li > a {
    white-space: normal;
    border-bottom: 0;
  }
}
.PostMention-preview-discussion {
  padding-top: 0 !important;
  font-weight: bold !important;
  white-space: normal !important;
}
.PostQuoteButton {
  position: absolute;
  .Button--color(@tooltip-color, @tooltip-bg);
}

@media @phone {
  .MentionsDropdown {
    max-width: 100%;
  }
}
.Post-footer .item-replies {
  position: relative;
}