.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    font-family: system-ui, -apple-system, sans-serif;
  }
  
  .button {
    padding: 0.75rem 1.5rem;
    margin: 0.5rem;
    font-size: 1rem;
    cursor: pointer;
    background-color: var(--primary-color, #4CAF50);
    color: white;
    border: none;
    border-radius: 0.25rem;
    transition: all 0.3s ease;
  }
  
  .button:disabled {
    background-color: var(--disabled-color, #cccccc);
    cursor: not-allowed;
    opacity: 0.7;
  }
  
  .error-message {
    color: var(--error-color, #ff4444);
    padding: 0.5rem;
    margin: 0.5rem 0;
    border-left: 4px solid currentColor;
    background-color: var(--error-bg, #fff5f5);
  }