body {
    margin: 0;
    font-family: sans-serif;
  }

  /* Masque le contenu de l'app */
  #app {
    display: none;
  }

  /* Écran de chargement plein écran */
  #preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    flex-direction: column;
  }

  /* Animation simple */
  .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #ccc;
    border-top: 4px solid #4a90e2;
    border-radius: 50%;
    animation: spin 1s linear infinite;
  }

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

  .loading-text {
    margin-top: 10px;
    color: #555;
    font-size: 14px;
  }