:root {
  --toast-bg: #1e293b;
  --toast-text: #f8fafc;
  --toast-muted: #94a3b8;
  --toast-success: #10b981;
  --toast-error: #ef4444;
  --toast-warning: #f59e0b;
  --toast-info: #3b82f6;
  --toast-font: 'Inter', system-ui, -apple-system, sans-serif;
  --toast-radius: 10px;
}

.toast-stack-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 380px;
  width: calc(100vw - 3rem);
  pointer-events: none;
  font-family: var(--toast-font);
}

.toast-card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1rem 1.125rem;
  background: var(--toast-bg);
  color: var(--toast-text);
  border-radius: var(--toast-radius);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
  border-left: 4px solid var(--toast-info);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(12px) scale(0.96);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.toast-card.toast-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.toast-card.toast-hiding {
  opacity: 0;
  transform: translateY(8px) scale(0.95);
}

/* Iconos */
.toast-icon-box {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.toast-icon-box svg {
  width: 100%;
  height: 100%;
}

.toast-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.toast-title {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--toast-text);
}

.toast-message {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--toast-muted);
  line-height: 1.35;
}

.toast-close-btn {
  background: transparent;
  border: none;
  color: var(--toast-muted);
  font-size: 0.875rem;
  cursor: pointer;
  padding: 0.125rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease;
}

.toast-close-btn:hover {
  color: #ffffff;
}

/* Tipos */
.toast-card.toast-success {
  border-left-color: var(--toast-success);
}
.toast-card.toast-success .toast-icon-box {
  color: var(--toast-success);
}

.toast-card.toast-error {
  border-left-color: var(--toast-error);
}
.toast-card.toast-error .toast-icon-box {
  color: var(--toast-error);
}

.toast-card.toast-warning {
  border-left-color: var(--toast-warning);
}
.toast-card.toast-warning .toast-icon-box {
  color: var(--toast-warning);
}

.toast-card.toast-info {
  border-left-color: var(--toast-info);
}
.toast-card.toast-info .toast-icon-box {
  color: var(--toast-info);
}

/* Barra de Progreso */
.toast-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.2);
  transform-origin: left;
  animation: toastProgress linear forwards;
}

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