.nav-tabs {
  border-bottom: 1px solid #dee2e6;
  position: relative;
}
.nav-tabs .nav-link {
  border: 1px solid transparent;
  border-top-left-radius: 0.25rem;
  border-top-right-radius: 0.25rem;
  color: #495057;
  transition: color 0.3s ease;
}
.nav-tabs .nav-link.active {
  color: #007bff;
  background-color: #fff;
  border-color: #dee2e6 #dee2e6 #fff;
}
.nav-tabs .sliding-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background-color: #007bff;
  transition: all 0.3s ease;
}
.tab-content {
  margin-top: 20px;
}
.tab-pane {
  display: none;
}
.tab-pane.active {
  display: block;
}