#simple_tabs {
  margin: 0;
  padding: 5px 0;
}

#simple_tabs > li {
  background-color: #ccc;
  border: 1px solid #ccc;
  border-bottom: none;
  cursor: pointer;
  display: inline;
  margin: 0;
  padding: 5px 10px;
}
#simple_tabs > li.current {
  background-color: #fff;
  padding-bottom: 6px;
}

#simple_tab_panels > div {
  background-color: #fff;
  border: 1px solid #ccc;
  display: none;
  margin: 0;
  padding: 10px;
}