.loading {
  position: fixed; inset: 0; z-index: 1000;
  display: grid; place-content: center; justify-items: center; gap: 14px;
  background: var(--ground); color: var(--fg);
  font-family: var(--font); font-size: 16px; line-height: 22px;
  transition: opacity 220ms ease-out;
}
.loading p { margin: 0; }
.loading.is-leaving { opacity: 0; pointer-events: none; }

/* The text and ring wait 200 ms, so a fast load shows only the plain background.
   Visibility is animated too, so a screen reader does not read a line before it shows. */
.loading-text, .loading-ring { animation: loading-appear 150ms ease-out 200ms both; }
@keyframes loading-appear {
  from { opacity: 0; visibility: hidden; }
  to { opacity: 1; visibility: visible; }
}

.loading-ring { width: 24px; height: 24px; }
.loading-ring::after {
  content: ""; display: block; box-sizing: border-box; width: 24px; height: 24px;
  border: 3px solid var(--fg); border-color: var(--fg) transparent var(--fg) transparent; border-radius: 50%;
  animation: loading-spin 1.2s linear infinite;
}
@keyframes loading-spin { to { transform: rotate(360deg); } }

.loading-slow { color: var(--muted); font-size: 13px; line-height: 18px; animation: loading-appear 150ms ease-out 10s both; }

.loading.is-failed .loading-ring, .loading.is-failed .loading-slow { display: none; }
.loading.is-failed .loading-text {
  max-width: min(560px, calc(100vw - 32px)); padding: 12px 16px; overflow-wrap: anywhere;
  background: var(--surface-2); border-left: 2px solid var(--danger); border-radius: 8px;
  animation: none; opacity: 1; visibility: visible;
}