.alert-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
  max-width: 400px;
}
.alert {
  display: flex;
  align-items: center;
  padding: 15px 20px;
  margin-bottom: 10px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  opacity: 0;
  transform: translateX(400px);
  transition: all 0.3s ease;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.alert.show {
  opacity: 1;
  transform: translateX(0);
}
.alert-success {
  background: linear-gradient(135deg, #10b981 0, #059669 100);
  color: white;
}
.alert-error {
  background: linear-gradient(135deg, #ef4444 0, #dc2626 100);
  color: white;
}
.alert-warning {
  background: linear-gradient(135deg, #f59e0b 0, #d97706 100);
  color: white;
}
.alert-info {
  background: linear-gradient(135deg, #3b82f6 0, #2563eb 100);
  color: white;
}
.alert-icon {
  font-size: 20px;
  margin-right: 12px;
  font-weight: bold;
}
.alert-message {
  flex: 1;
}
.alert-close {
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
  margin-left: 10px;
  padding: 0 5px;
  opacity: 0.8;
}
.alert-close:hover {
  opacity: 1;
}