<style>
  body {
    margin: 0;
  }

  #flutter-loader {
    position: fixed;
    inset: 0; /* replaces top/left/right/bottom */
    background: #ffffff;

    display: flex;
    align-items: center;
    justify-content: center;

    z-index: 999999; /* very high to avoid Flutter overlap */
  }

  @keyframes spin {
    to { transform: rotate(360deg); }
  }

  .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #e5e7eb;
    border-top: 4px solid #006C7D;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
  }
</style>