body {
  margin: 0;
  padding: 20px;
  font-family: system-ui, -apple-system, sans-serif;
  background: #f5f5f5;
}

.loading {
  text-align: center;
  padding: 50px;
}

.spinner {
  border: 4px solid #f3f3f3;
  border-top: 4px solid #3498db;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 2s linear infinite;
  margin: 0 auto 20px;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.error {
  color: #e74c3c;
  background: #fdf2f2;
  border: 1px solid #fecaca;
  border-radius: 4px;
  padding: 15px;
  margin: 20px 0;
}