#startup-shell {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 24px;
  text-align: center;
  background: var(--app-background, #ffffff);
  color: var(--app-foreground, #121212);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  transition: opacity 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

#startup-shell h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
}

#startup-shell p {
  margin: 0;
  font-size: 16px;
  line-height: 1.5;
  max-width: 360px;
  opacity: 0.9;
}

body.app-ready #startup-shell {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

@media (prefers-color-scheme: dark) {
  #startup-shell {
    background: var(--app-background, #121212);
    color: var(--app-foreground, #f5f5f5);
  }
}