.arb-toast-stack {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
  max-width: calc(100vw - 40px);
}
.arb-toast {
  pointer-events: auto;
  min-width: 280px;
  max-width: 420px;
  padding: 14px 18px;
  border-radius: 8px;
  background: #1a1a1e;
  color: #eee;
  border-left: 4px solid #2a2a2e;
  box-shadow: 0 10px 30px rgba(0,0,0,0.45);
  font-size: 14px;
  line-height: 1.4;
  animation: arb-toast-in 0.28s ease;
}
.arb-toast--info { border-left-color: #0ea5e9; }
.arb-toast--success { border-left-color: #16a34a; background: #0f1f12; }
.arb-toast--error { border-left-color: #dc2626; background: #1f0e0e; }
.arb-toast--warn { border-left-color: #f97316; }
@keyframes arb-toast-in {
  from { transform: translateX(40px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}
@media (max-width: 600px) {
  .arb-toast-stack { top: 12px; right: 12px; left: 12px; }
  .arb-toast { min-width: 0; width: 100%; }
}