html, body { min-height: 100%; margin: 0; font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }
        #root { min-height: 100%; background: #f5f5f5; }
        .loading-container { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
        .loading { text-align: center; color: #666; }
        .loading h1 { font-size: 24px; margin: 20px 0; }
        .loading p { font-size: 14px; color: #999; }
        .loading .spinner { 
          border: 3px solid #f3f3f3; 
          border-top: 3px solid #3498db; 
          border-radius: 50%; 
          width: 40px; 
          height: 40px; 
          animation: spin 1s linear infinite;
          margin: 20px auto;
        }
        @keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }