.navbar .navbar-nav .nav-link {
  color: #333;
  font-size: 1.1em;
  position: relative;
}

.navbar .navbar-nav .nav-link:hover {
  color: #000000;
}

.navbar .navbar-nav .nav-link::after {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  background-color: #dc3545;
  color: transparent;
  width: 0%;
  content: '.';
  height: 3px;
}

.navbar .navbar-nav .nav-link:hover::after {
  width: 100%;
}