html, body { margin: 0; background: #f4f7fb; }
#app-startup {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 20px; padding: 24px; box-sizing: border-box;
  font: 16px/1.5 system-ui, sans-serif; color: #1e293b; background: #f4f7fb;
  text-align: center;
}
#app-startup img { border-radius: 20px; }
#app-startup p { margin: 0; max-width: 360px; }
.startup-spinner {
  width: 24px; height: 24px; border: 3px solid #d7e8e2;
  border-top-color: #00a884; border-radius: 50%; animation: startup-spin 1s linear infinite;
}
#startup-retry { border: 0; border-radius: 12px; padding: 12px 24px; background: #00856a; color: white; font: inherit; cursor: pointer; }
@keyframes startup-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .startup-spinner { animation: none; } }