.bivo-toast-stack {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 10900;
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: min(420px, calc(100vw - 24px));
  pointer-events: none;
}

.bivo-toast {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 16px 16px 18px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.14), 0 2px 8px rgba(15, 23, 42, 0.06);
  overflow: hidden;
  pointer-events: auto;
  opacity: 0;
  transform: translateX(24px) scale(0.98);
  transition: opacity 0.24s ease, transform 0.24s ease;
}

.bivo-toast.is-visible {
  opacity: 1;
  transform: translateX(0) scale(1);
}

.bivo-toast.is-leaving {
  opacity: 0;
  transform: translateX(18px) scale(0.98);
}

.bivo-toast-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.bivo-toast-copy {
  min-width: 0;
  padding-top: 2px;
}

.bivo-toast-title {
  display: block;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.35;
  color: #0f172a;
}

.bivo-toast-message {
  margin: 4px 0 0;
  font-size: 0.84rem;
  line-height: 1.45;
  color: #64748b;
}

.bivo-toast-copy.is-message-only .bivo-toast-title {
  font-weight: 600;
}

.bivo-toast-close {
  width: 30px;
  height: 30px;
  border: 0;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.04);
  color: #64748b;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.bivo-toast-close:hover {
  background: rgba(15, 23, 42, 0.08);
  color: #0f172a;
}

.bivo-toast-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  transform-origin: left center;
  animation: bivoToastProgress 5.2s linear forwards;
}

.bivo-toast.is-paused .bivo-toast-progress {
  animation-play-state: paused;
}

.bivo-toast-success {
  border-color: rgba(22, 163, 74, 0.18);
}

.bivo-toast-success .bivo-toast-icon {
  background: rgba(22, 163, 74, 0.12);
  color: #15803d;
}

.bivo-toast-success .bivo-toast-progress {
  background: linear-gradient(90deg, #16a34a, #4ade80);
}

.bivo-toast-error {
  border-color: rgba(220, 38, 38, 0.18);
}

.bivo-toast-error .bivo-toast-icon {
  background: rgba(220, 38, 38, 0.1);
  color: #dc2626;
}

.bivo-toast-error .bivo-toast-progress {
  background: linear-gradient(90deg, #dc2626, #f87171);
}

.bivo-toast-warning {
  border-color: rgba(249, 83, 21, 0.22);
}

.bivo-toast-warning .bivo-toast-icon {
  background: rgba(249, 83, 21, 0.12);
  color: #ea580c;
}

.bivo-toast-warning .bivo-toast-progress {
  background: linear-gradient(90deg, #f95315, #fb923c);
}

.bivo-toast-info {
  border-color: rgba(37, 99, 235, 0.16);
}

.bivo-toast-info .bivo-toast-icon {
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
}

.bivo-toast-info .bivo-toast-progress {
  background: linear-gradient(90deg, #2563eb, #60a5fa);
}

@keyframes bivoToastProgress {
  from { transform: scaleX(1); }
  to { transform: scaleX(0); }
}

@media (max-width: 575px) {
  .bivo-toast-stack {
    top: auto;
    bottom: 16px;
    right: 12px;
    left: 12px;
    width: auto;
  }

  .bivo-toast {
    transform: translateY(18px) scale(0.98);
  }

  .bivo-toast.is-visible {
    transform: translateY(0) scale(1);
  }

  .bivo-toast.is-leaving {
    transform: translateY(12px) scale(0.98);
  }
}