#app-container {
  position: relative;
  width: 100%;
  height: 100vh;
}

/* Flutter Canvas */
#flutter {
  width: 100%;
  height: 100%;
}

/* Loader Overlay */
#flutter_loader {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;

  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: left;

  padding-top: 40px;
  background: white; /* oder transparent */
  z-index: 9999;

  opacity: 1;
  transition: opacity 0.3s ease;
}

#flutter_loader.fade-out {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid #ccc;
  border-top-color: #4285f4;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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