.opc-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1a2332;
  color: #fff;
  padding: 14px 28px;
  border-radius: 10px;
  font-size: 0.95rem;
  z-index: 9999;
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  max-width: 90vw;
  text-align: center;
}
.opc-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.opc-toast.error { background: #7f1d1d; border: 1px solid #ef4444; }
.opc-toast.success { background: #1a2332; border: 1px solid #c9a962; }

.opc-hp { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
  .opc-toast { transition: none; }
}