.book-preview-trigger { display: block; cursor: zoom-in; }
.book-preview-trigger:focus-visible { outline: 3px solid var(--copper); outline-offset: 8px; }
.preview-caption-link { color: var(--copper); text-decoration: underline; text-underline-offset: 4px; padding-block: 12px; margin-block: -12px; }
.preview-caption-link span { margin-left: 9px; }
.preview-dialog {
  width: min(1220px, calc(100vw - 48px));
  height: min(920px, calc(100dvh - 48px));
  max-width: none;
  max-height: calc(100dvh - 48px);
  padding: 0;
  margin: auto;
  border: 1px solid #b6ac95;
  background: #f8f3e7;
  box-shadow: 0 30px 120px #0b17195c;
}
.preview-dialog::backdrop { background: #14221ee8; backdrop-filter: blur(6px); }
.preview-shell { display: flex; flex-direction: column; height: 100%; overflow: hidden; }
.preview-dialog[open] .preview-shell { animation: preview-arrive .22s ease-out; }
.preview-header { display: flex; align-items: center; justify-content: space-between; flex-shrink: 0; padding: 18px 24px; gap: 20px; border-bottom: 1px solid var(--line); }
.preview-header .eyebrow { color: var(--copper); font-size: 8px; }
.preview-header h2 { margin: 5px 0 0; font-size: 30px; line-height: 1.1; }
.preview-close { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; flex-shrink: 0; border: 1px solid #c8bca7; color: var(--ink); background: transparent; font-size: 27px; line-height: 1; cursor: pointer; }
.preview-close:hover { background: #ebe4d3; }
.preview-body { display: grid; grid-template-columns: minmax(0, 1fr) 310px; flex: 1; min-height: 0; }
.preview-stage { display: flex; flex-direction: column; min-height: 0; min-width: 0; background: #e5dfd1; }
.preview-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-shrink: 0; padding: 7px 18px; min-height: 49px; border-bottom: 1px solid #c8bca7; }
.preview-page-label { font-size: 8px; letter-spacing: .1em; color: #586456; }
.preview-tools { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.preview-zoom, .preview-full-size { font: 500 11px/1.4 var(--sans); color: var(--ink); background: transparent; border: 0; padding: 9px 0; cursor: pointer; text-decoration: underline; text-underline-offset: 4px; }
.preview-full-size { color: var(--copper); }
.preview-viewport { position: relative; overflow: auto; overscroll-behavior: contain; flex: 1; min-height: 0; outline-offset: -4px; touch-action: pan-y pinch-zoom; }
.preview-viewport.is-zoomed { touch-action: pan-x pan-y pinch-zoom; }
.preview-surface { position: relative; min-width: 100%; min-height: 100%; }
.preview-paper { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); background: white; box-shadow: 0 4px 18px #443e3226; }
.preview-page-image { display: block; width: 100%; height: 100%; max-width: none; cursor: zoom-in; user-select: none; transition: opacity .16s ease; }
.is-zoomed .preview-page-image { cursor: zoom-out; }
.preview-stage.is-loading .preview-page-image, .preview-stage.has-error .preview-page-image { opacity: 0; }
.preview-loading, .preview-error { position: absolute; inset: 0; align-items: center; justify-content: center; flex-direction: column; gap: 12px; padding: 18px; text-align: center; font-size: 13px; color: var(--muted); }
.preview-loading { display: none; }
.preview-stage.is-loading .preview-loading { display: flex; }
.preview-error { display: flex; }
.preview-error[hidden] { display: none; }
.preview-error button { border: 1px solid var(--line); background: var(--paper-light); color: var(--ink); padding: 10px 16px; }
.preview-navigation { display: grid; grid-template-columns: 44px minmax(0, 1fr) 44px; align-items: center; gap: 12px; padding: 8px 18px; border-top: 1px solid #c8bca7; flex-shrink: 0; }
.preview-arrow { width: 44px; height: 44px; border: 1px solid #b8ad97; background: transparent; color: var(--ink); cursor: pointer; font-size: 23px; }
.preview-arrow:disabled { opacity: .28; cursor: default; }
.preview-arrow:not(:disabled):hover { background: #f4efdf; }
.preview-current { text-align: center; min-width: 0; }
.preview-counter { display: block; color: var(--copper); font-size: 8px; letter-spacing: .12em; }
.preview-current-title { display: block; margin-top: 4px; font-size: 12px; }
.preview-sidebar { display: flex; flex-direction: column; gap: 18px; padding: 24px; overflow: hidden; border-left: 1px solid var(--line); }
.preview-intro, .preview-reading-tip, .preview-purchase { flex-shrink: 0; }
.preview-intro > .eyebrow { font-size: 8px; color: var(--copper); }
.preview-intro h3 { font: 500 33px/1.12 var(--serif); letter-spacing: -.035em; margin-top: 15px; }
.preview-intro p:not(.eyebrow) { margin-top: 16px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.preview-thumbnails { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; position: relative; min-height: 0; flex: 1; overflow-y: auto; align-content: start; padding: 2px; scrollbar-width: thin; scrollbar-color: #a18b67 transparent; }
.preview-thumb { padding: 4px; border: 1px solid #cdc3b1; background: #eee7d8; color: var(--muted); cursor: pointer; }
.preview-thumb img { width: 100%; aspect-ratio: 7/10; display: block; object-fit: contain; background: white; }
.preview-thumb span { display: block; padding: 7px 0 3px; font-size: 9px; }
.preview-thumb[aria-pressed="true"] { border-color: var(--copper); background: #e4d6c1; color: #814327; box-shadow: 0 0 0 1px var(--copper); }
.preview-dialog .preview-reading-tip { color: var(--muted); font-size: 11px; line-height: 1.8; margin: 0; }
.preview-purchase { margin-top: auto; padding-top: 20px; border-top: 1px solid var(--line); }
.preview-dialog .preview-purchase > p { color: var(--muted); font-size: 10px; line-height: 1.7; margin: 0 0 12px; }
.preview-purchase .button { display: flex; justify-content: center; width: 100%; gap: 8px; font-size: 11px; padding: 16px 9px; white-space: nowrap; }
.preview-close:focus-visible, .preview-arrow:focus-visible, .preview-thumb:focus-visible, .preview-zoom:focus-visible, .preview-full-size:focus-visible { outline: 3px solid var(--copper); outline-offset: 3px; }
@keyframes preview-arrive { from { opacity: 0; transform: translateY(10px) scale(.99); } to { opacity: 1; transform: none; } }
@media (max-width: 760px), (max-height: 500px) {
  .preview-dialog { width: calc(100vw - 16px); height: calc(100dvh - 16px); max-height: calc(100dvh - 16px); }
  .preview-header { padding: 12px 15px; gap: 12px; }
  .preview-header h2 { font-size: 25px; }
  .preview-header .eyebrow { font-size: 7px; }
  .preview-close { width: 40px; height: 40px; }
  .preview-body { grid-template-columns: 1fr; grid-template-rows: minmax(0, 1fr) auto; }
  .preview-sidebar { display: block; padding: 12px 15px; border: 0; border-top: 1px solid var(--line); }
  .preview-intro, .preview-thumbnails, .preview-reading-tip, .preview-purchase > p { display: none; }
  .preview-purchase { padding: 0; border: 0; margin: 0; }
  .preview-purchase .button { font-size: 12px; padding: 13px; }
  .preview-toolbar { padding-inline: 13px; gap: 8px; }
  .preview-page-label { font-size: 7px; max-width: 120px; line-height: 1.5; }
  .preview-tools { gap: 12px; }
  .preview-zoom, .preview-full-size { font-size: 10px; }
  .preview-navigation { padding: 6px 13px; gap: 8px; }
  .preview-current-title { font-size: 11px; }
}
@media (max-height: 500px) {
  .preview-header { padding-block: 6px; }
  .preview-header .eyebrow { display: none; }
  .preview-header h2 { margin: 0; font-size: 22px; }
  .preview-toolbar { min-height: 35px; padding-block: 0; }
  .preview-navigation { padding-block: 3px; }
  .preview-sidebar { padding-block: 7px; }
}
@media (prefers-reduced-motion: reduce) {
  .preview-dialog[open] .preview-shell { animation: none; }
  .preview-page-image { transition: none; }
}
@media print { .preview-dialog { display: none !important; } }