<div class="tabs">
  <a href="">1 модуль</a>
  <a href="">2 модуль</a>
  <a href="">3 модуль</a>
  <a href="">4 модуль</a>
  <a href="">5 модуль</a>
</div>

.tabs {
  height: 48px;
  align-items: flex-start;
  margin-top: 20px;
  display: flex;
  width: fit-content;
  border-bottom: 1px solid gray;
  flex-wrap:wrap;
}
.tabs a {
  padding: 5px 20px;
  border-left: 1px solid gray;
  border-right: 1px solid gray;
  text-decoration: none;
  color:black;
}
.tabs a:nth-child(1) {
  border-right:unset;
  border-left:unset;
  border-bottom: 1px solid gold;
  padding-bottom: 25px; 
}