/* 커스텀 CSS */
.spinner {
  border: 2px solid #f3f3f3;
  border-top: 2px solid #3498db;
  border-radius: 50%;
  width: 16px;
  height: 16px;
  animation: spin 1s linear infinite;
}

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

.success-message {
  background-color: #d4edda;
  border-color: #c3e6cb;
  color: #155724;
}

.error-message {
  background-color: #f8d7da;
  border-color: #f5c6cb;
  color: #721c24;
}