* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.tab {
  width: 400px;
  padding: 10px 0;
  overflow-y: auto;
}

ul {
  width: 200%;
  display: flex;
}

ul li {
  list-style: none;
  flex: 1;
  line-height: 30px;
  text-align: center;
}

ul li.active {
  position: relative;

}

ul li.active::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 10px;
  right: 10px;
  border-bottom: 2px solid #00B464;
}