.nexus-popup {
  position: fixed;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10, 10, 30, 0.95);
  color: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 20px #00f0ff;
  z-index: 9999;
  animation: fadeIn 1s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateX(-50%) scale(0.9); }
  to { opacity: 1; transform: translateX(-50%) scale(1); }
}