.nav-link {
  position: relative;
  padding: .5rem .95rem;
  border-radius: .75rem;
  font-size: .875rem;
  color: rgba(203,213,225,.72);
  transition: color .25s ease, background-color .25s ease;
}

.nav-link:hover {
  color: #ffffff;
  background: rgba(255,255,255,.06);
}

.nav-link.active {
  color: #67e8f9;
  background: rgba(34,211,238,.08);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 2px;
  transform: translateX(-50%);
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #22d3ee, #a78bfa);
  opacity: 0;
  transition: opacity .45s ease;
}

.nav-link.active::after {
  opacity: 1;
}