.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  max-width: none;
  padding: 0 32px;
  background: var(--cream);
}

.nav nav a {
  position: relative;
  padding: 31px 0 27px;
}

.nav nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 18px;
  left: 0;
  height: 2px;
  background: var(--maroon);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}

.nav nav a[aria-current="page"] { color: var(--maroon); }
.nav nav a[aria-current="page"]::after { transform: scaleX(1); }

@media (max-width: 760px) {
  .nav { padding: 0 18px; }
  .nav nav a { padding: 3px 0; }
  .nav nav a::after { display: none; }
}