.pb_col {
  width: 30%;
  margin-right: 2%;
  margin-bottom: -10000px;
  padding-bottom: 10000px;
  position: relative;
}

#potb_challenge {
  width: 100%;
  clear: both;
  overflow: hidden;
  position: relative;
}

#potb_challenge h4 {
  margin: 0px 0px 4px 0px;
}

#potb_challenge .withborder {
  border-right: 1px dashed black;
}

#potb_challenge .content-view-full {
  position: relative;
}

.pbcolsep {
  border-bottom: 2px solid black;
  margin: 5px 0px 15px 0px;
  width: 100%;
  height: 1px;
}