nav {
  background-color: black;
}

.appIcon {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 60px;
  height: auto;
  padding-top: 1em;
}

.nav {
  margin: 0;
  padding: 2em;
  list-style: none;
  display: flex;
  text-align: center;
  align-items: center;
  justify-content: center;
  border-bottom: 2px solid gray;
}

.navItem {
  text-decoration: none;
  color: white;
  opacity: 0.6;
  padding: 0.8em;
  border: none;
  background-color: transparent;
  font-size: 1.2em;
  position: relative;
  margin-left: 0.5em;
  margin-right: 0.5em;
}

@media (max-width: 600px) {
  .navItem {
    font-size: 0.8em;
    padding: 0.1em;
  }
}

.navItem:hover {
  opacity: 1;
  color: white;
  transition: 0.5s;
}

.navItem:after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  border-bottom: 2px solid white;
  transition: 0.4s;
}

.navItem:hover:after {
  width: 100%;
  opacity: 1;
  transition: 0.5s;
}

.selectedNavItem {
  color: white;
  opacity: 1;
}