.nav-link.active {
  position: relative;
  padding-bottom: 2px;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: white;
  transform: scaleX(1);
  transition: transform 0.3s ease;
}