ul.tab-nav {
  list-style: none;
  border-bottom: 1px solid #bbb;
  padding-left: 5px;
}

ul.tab-nav li {
  display: inline;
}

ul.tab-nav li .button {
  font-size: 13px;
  font-weight: 500;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  margin-bottom: -1px;
  border-bottom: none;
}

ul.tab-nav li .active.button {
  border-bottom: 1px solid #fff;
  color: #000;
  font-weight: 600;
}

.tab-content .tab-pane {
  display: none;
}

.tab-content .tab-pane.active {
  display: block;
}