#app-startup {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  box-sizing: border-box;
  padding: 24px;
  background: #f4f6f9;
  color: #606266;
  font:
    14px/1.5 system-ui,
    sans-serif;
  text-align: center;
}
#app-startup [hidden] {
  display: none;
}
#app-startup p {
  margin: 0;
}
#app-startup .startup-spinner {
  width: 36px;
  height: 36px;
  box-sizing: border-box;
  border: 3px solid #d9ecff;
  border-top-color: #409eff;
  border-radius: 50%;
  animation: startup-spin 0.9s linear infinite;
}
#app-startup button {
  padding: 8px 16px;
  border: 1px solid #409eff;
  border-radius: 4px;
  background: #409eff;
  color: white;
  font: inherit;
  cursor: pointer;
}
#app-startup button:focus-visible {
  outline: 2px solid #337ecc;
  outline-offset: 3px;
}
@keyframes startup-spin {
  to {
    transform: rotate(360deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  #app-startup .startup-spinner {
    animation: none;
  }
}