/* Ceritera V8.7 — virtual page window and performance diagnostics. */
.reading-mode-magazine .reader-content.virtualized-reader-content {
  position: relative;
  width: 100% !important;
  height: var(--virtual-page-height, 520px) !important;
  max-width: none;
  overflow: hidden;
  columns: auto !important;
  column-count: 1 !important;
  column-gap: 0 !important;
  column-rule: 0 !important;
  transform: none !important;
  opacity: 1 !important;
  contain: layout paint style;
  will-change: auto;
}
.virtual-page-track {
  display: flex;
  width: 300%;
  height: 100%;
  transform: translate3d(-33.333333%, 0, 0);
  transition: transform 220ms var(--ease-standard), opacity 160ms ease;
  will-change: transform;
}
.virtual-page-track.no-anim { transition: none !important; }
.virtual-page-slot {
  flex: 0 0 33.333333%;
  width: 33.333333%;
  height: 100%;
  overflow: hidden;
  padding: 0;
  box-sizing: border-box;
  background: transparent;
  contain: layout paint style;
}
.virtual-page-surface,
.virtual-page-measure {
  width: 100%;
  height: 100%;
  column-fill: auto;
  overflow: hidden;
  box-sizing: border-box;
}
.virtual-page-surface.is-two-column,
.virtual-page-measure.is-two-column {
  column-count: 2;
  column-gap: 40px;
  column-rule: 1px solid var(--line);
}
.virtual-page-surface.is-one-column,
.virtual-page-measure.is-one-column {
  column-count: 1;
  column-gap: 0;
  column-rule: 0;
}
.virtual-page-surface > [data-virtual-continuation="true"]::first-letter { float: none !important; font: inherit !important; padding: 0 !important; color: inherit !important; }
.virtual-page-surface .chapter-ending-page,
.virtual-page-measure .chapter-ending-page { min-height: 0; height: auto; }
.virtual-page-placeholder {
  display: grid;
  place-items: center;
  min-height: 100%;
  color: var(--text-secondary);
  font: 700 var(--text-xs)/1.4 var(--font-label);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.virtual-page-measure-host {
  position: fixed;
  left: -20000px;
  top: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: -1;
}
.performance-offline-badge {
  display: none;
  position: fixed;
  right: 12px;
  bottom: max(12px, env(safe-area-inset-bottom));
  z-index: 1000;
  padding: .55rem .8rem;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  background: var(--surface-paper);
  color: var(--text-secondary);
  box-shadow: var(--shadow-2);
  font: 700 var(--text-2xs)/1 var(--font-label);
  letter-spacing: .06em;
  text-transform: uppercase;
}
html.is-offline .performance-offline-badge { display: block; }
@media (prefers-reduced-motion: reduce) {
  .virtual-page-track { transition: none !important; }
}


/* Ceritera V8.7.1 — installable PWA surface. */
.pwa-install-banner[hidden] { display: none !important; }
.pwa-install-banner {
  position: fixed;
  left: 50%;
  bottom: max(16px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 1300;
  width: min(680px, calc(100vw - 28px));
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: .8rem;
  padding: .75rem;
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface-paper) 96%, transparent);
  color: var(--text-primary);
  box-shadow: var(--shadow-cover);
  backdrop-filter: blur(16px);
}
.pwa-install-banner img {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  box-shadow: var(--shadow-control);
}
.pwa-install-copy { min-width: 0; display: grid; gap: .2rem; }
.pwa-install-copy strong { font: 700 var(--text-md)/1.2 var(--font-display); }
.pwa-install-copy span { color: var(--text-secondary); font: 500 var(--text-xs)/1.4 var(--font-ui); }
.pwa-install-primary,
.pwa-install-dismiss {
  min-height: 42px;
  border-radius: 999px;
  padding: .65rem 1rem;
  font: 750 var(--text-xs)/1 var(--font-ui);
}
.pwa-install-primary { background: var(--action-primary); color: #fff; border-color: var(--action-primary); }
.pwa-install-dismiss { background: transparent; color: var(--text-secondary); border-color: transparent; }
.pwa-help-content { display: grid; justify-items: center; gap: 1rem; padding: 1rem 0 .25rem; color: var(--text-primary); }
.pwa-help-content img { border-radius: 22px; box-shadow: var(--shadow-raised); }
.pwa-help-content ol, .pwa-help-content p { width: min(100%, 42rem); margin: 0; line-height: 1.7; }
.pwa-help-note { padding: .8rem 1rem; border: 1px solid var(--border-subtle); background: var(--surface-subtle); border-radius: 12px; color: var(--text-secondary); font-size: var(--text-sm); }
html.is-pwa .pwa-install-banner { display: none !important; }
@media (max-width: 620px) {
  .pwa-install-banner {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: .65rem;
    padding: .65rem;
  }
  .pwa-install-banner img { width: 48px; height: 48px; border-radius: 12px; }
  .pwa-install-copy span { display: none; }
  .pwa-install-primary { padding-inline: .85rem; }
  .pwa-install-dismiss { grid-column: 1 / -1; width: 100%; min-height: 34px; padding: .4rem; }
}
@media (prefers-reduced-motion: reduce) {
  .pwa-install-banner { backdrop-filter: none; }
}