.alert-banner {
  position: fixed;
  bottom: 20px;
  left: 20px;
  max-width: 320px;
  background: #fff;
  color: #5b6068;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  padding: 15px 20px;
  border-radius: 6px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(30px);
  pointer-events: none;
  transition: transform 0.4s ease, opacity 0.4s ease;
  z-index: 9999;
}

.alert-banner.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.alert-banner h4 {
  margin: 0 0 8px 0;
  font-size: 16px;
  font-weight: 600;
}

.alert-banner button {
  position: absolute;
  top: 8px;
  right: 8px;
  border: none;
  background: transparent;
  font-size: 16px;
  cursor: pointer;
  color: #666;
}

.alert-banner.info {
  border-left: 5px solid #17a2b8;
}

.alert-banner.info h4 {
  color: #17a2b8;
}

.alert-banner.success {
  border-left: 5px solid #28a745;
}

.alert-banner.success h4 {
  color: #28a745;
}

.alert-banner.warning {
  border-left: 5px solid #ffc107;
}

.alert-banner.warning h4 {
  color: #e0a800;
}

.alert-banner.danger {
  border-left: 5px solid #d9534f;
}

.alert-banner.danger h4 {
  color: #d9534f;
}