/* Book preview enhancement; original site styling stays intact */
.book-preview-trigger{display:block;margin:12px 0 0;padding:10px 15px;border:0;border-radius:22px;background:#123b62;color:#fff;font:inherit;font-weight:700;cursor:pointer;transition:transform .15s,background .15s}.book-preview-trigger:hover,.book-preview-trigger:focus-visible{background:#245f8d;transform:translateY(-1px)}
.book-preview-dialog{width:min(760px,calc(100% - 28px));max-height:90vh;padding:0;border:0;border-radius:22px;box-shadow:0 25px 85px #102b4c55;background:#fffdf7;color:#123b62;overflow:auto}.book-preview-dialog::backdrop{background:#10273dba}.preview-shell{position:relative;padding:clamp(18px,4vw,36px)}.preview-close{position:absolute;right:14px;top:10px;background:#e9f0f6;color:#123b62;border:0;border-radius:50%;font-size:28px;width:40px;height:40px;cursor:pointer}.preview-heading h2{margin:8px 0;font-size:clamp(24px,4vw,36px)}.preview-heading p{margin:0 0 16px}.preview-tabs{display:flex;gap:8px;margin:16px 0}.preview-tabs button{font:inherit;font-weight:700;padding:10px 16px;border-radius:24px;border:1px solid #c8d8e6;background:white;color:#123b62;cursor:pointer}.preview-tabs button[aria-selected="true"]{background:#123b62;color:white}.preview-page{text-align:center;background:#f2f5f7;padding:12px;border-radius:14px}.preview-page img{display:block;max-height:52vh;max-width:100%;height:auto;width:auto;margin:auto;object-fit:contain;box-shadow:0 3px 12px #123b6226}.preview-fact{padding:12px 16px;background:#fff0c8;border-radius:12px;line-height:1.5}.preview-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.preview-download{display:inline-block;background:#f3bb24;color:#123b62;padding:12px 18px;border-radius:25px;font-weight:800;text-decoration:none}.preview-amazon{font-size:.9rem;opacity:.75}@media(max-width:600px){.preview-shell{padding:18px}.preview-page img{max-height:44vh}}


/* Popup-only refinement: compact preview and accessible download actions. */
.book-preview-dialog{
  max-height:min(92dvh,900px);
  overscroll-behavior:contain;
}
.book-preview-dialog .preview-shell{padding:clamp(14px,2.5vw,24px)}
.book-preview-dialog .preview-heading h2{margin:5px 0;font-size:clamp(23px,3.2vw,32px)}
.book-preview-dialog .preview-heading p{margin:0 0 8px}
.book-preview-dialog .preview-tabs{margin:10px 0}
.book-preview-dialog .preview-tabs button{padding:8px 14px}
.book-preview-dialog .preview-page{padding:8px}
.book-preview-dialog .preview-page img{max-height:min(34dvh,340px)}
.book-preview-dialog .preview-fact{margin:10px 0;padding:9px 13px;line-height:1.35}
.book-preview-dialog .preview-actions{
  position:sticky;
  bottom:-1px;
  z-index:2;
  padding:12px 0 3px;
  background:#fffdf7;
  box-shadow:0 -8px 16px #fffdf7e8;
}
@media(max-width:600px){
  .book-preview-dialog{max-height:92dvh}
  .book-preview-dialog .preview-shell{padding:15px}
  .book-preview-dialog .preview-heading h2{padding-right:34px;font-size:clamp(21px,6vw,28px)}
  .book-preview-dialog .preview-page img{max-height:32dvh}
  .book-preview-dialog .preview-actions{padding-top:10px}
  .book-preview-dialog .preview-amazon{font-size:.78rem}
}