/*
 * The loading screen (spec 0.2.0 §3.J *The loading screen*, Decision 106):
 * the plain HTML inside index.html's #root, shown until React replaces it.
 * A static file, so the CSP's style-src 'self' allows it with no hash, and
 * index.html needs no inline style. Every rule is scoped to .loading, so
 * nothing here touches the app once it has mounted. The colours are the
 * app's own background, foreground and muted tokens (src/index.css), so the
 * swap to the app doesn't flash; the screen follows the system's light or
 * dark setting, as the app's default theme (System) does.
 */
.loading {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1.5rem;
  text-align: center;
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
  color-scheme: light;
  background-color: #ffffff;
  color: #0a0a0a;
}

.loading > * {
  margin: 0;
}

.loading-name {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.loading-tagline,
.loading-ai {
  max-width: 32rem;
  color: #6b6b6b;
}

.loading-tagline {
  font-size: 1.125rem;
}

.loading-ai {
  font-size: 0.875rem;
}

.loading-ai a {
  color: #0a0a0a;
  text-decoration: underline;
  text-underline-offset: 0.2em;
  overflow-wrap: anywhere;
}

/* A small dot breathing while the app loads. */
.loading-pulse {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background-color: currentColor;
  animation: loading-pulse 1.2s ease-in-out infinite;
}

@keyframes loading-pulse {
  0%,
  100% {
    opacity: 0.25;
    transform: scale(0.8);
  }

  50% {
    opacity: 1;
    transform: scale(1);
  }
}

@media (prefers-color-scheme: dark) {
  .loading {
    color-scheme: dark;
    background-color: #0a0a0a;
    color: #fafafa;
  }

  .loading-tagline,
  .loading-ai {
    color: #a3a3a3;
  }

  .loading-ai a {
    color: #fafafa;
  }
}

/* Still under reduced motion: a steady dot. */
@media (prefers-reduced-motion: reduce) {
  .loading-pulse {
    animation: none;
    opacity: 0.6;
  }
}