ul.tabs {
  display: flex;
  flex-wrap: wrap;
  position: relative;
  margin: 0;
  padding-left: 0;
  list-style: none;
}
ul.tabs:not(:last-child) {
  margin-bottom: 20px;
}
ul.tabs::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
}
ul.tabs a {
  position: relative;
  display: block;
  padding: 10px 20px;
  font-weight: bold;
  text-decoration: none;
  border-style: solid;
  border-width: 2px 1px 1px 1px;
}
ul.tabs li:not(.is-active) a {
  border-color: transparent transparent #e6e6e6;
}
ul.tabs .is-active a {
  border-color: #ef5327 #e6e6e6 #fff #e6e6e6;
}