.page-navigation-loading {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(2px);
}
.page-navigation-loading[hidden] { display: none; }
.page-navigation-loading-card {
  display: flex; align-items: flex-start; gap: 14px;
  width: min(440px, 100%); padding: 20px 24px;
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--panel); color: var(--text);
  box-shadow: 0 16px 42px rgba(0, 0, 0, .22);
}
.page-navigation-loading-card > div { flex: 1; min-width: 0; }
.page-navigation-loading-card strong { display: block; font-size: 15px; }
.page-navigation-loading-stage {
  margin-top: 8px; color: var(--accent); font-size: 12px; font-weight: 700;
}
.page-navigation-loading-detail {
  margin-top: 5px; color: var(--muted); font-size: 13px; line-height: 1.5;
}
.page-navigation-loading-progress-heading {
  display: flex; justify-content: space-between; gap: 12px;
  margin-top: 18px; color: var(--muted); font-size: 12px;
}
.page-navigation-loading-progress-heading span:last-child {
  color: var(--text); font-variant-numeric: tabular-nums; font-weight: 700;
}
.page-navigation-loading-progress {
  height: 8px; margin-top: 7px; overflow: hidden;
  border-radius: 999px; background: var(--surface-hover);
}
.page-navigation-loading-progress > span {
  display: block; width: 0; height: 100%;
  border-radius: inherit; background: var(--accent);
}
.page-navigation-loading-spinner {
  flex: 0 0 21px; width: 21px; height: 21px;
  border: 3px solid var(--surface-hover); border-top-color: var(--accent);
  border-radius: 50%; animation: page-navigation-spin .75s linear infinite;
}
@keyframes page-navigation-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .page-navigation-loading-spinner { animation: none; }
}