#block-comments-block-comments-block {
  float: right;
  width: 30%;
}

#block-comments-block-comments-block .content {
  border-left: 1px solid #cacaca;
  margin-left: 10px;
  padding-left: 10px;
}

/*
cancel above for .content nested inside it
*/
#block-comments-block-comments-block .content .content {
  border-left: none;
  margin-left: 0;
  padding-left: 0;
}