.isbn-page { padding-bottom: 0; }
.isbn-page ::selection { background: var(--blue-wash); color: var(--navy); }
.isbn-masthead { display: flex; min-height: 80px; padding: 16px max(24px, calc((100% - 1320px) / 2)); background: var(--navy); align-items: center; justify-content: space-between; gap: 20px; }
.isbn-back { display: inline-flex; min-height: 44px; padding: 8px 0; color: var(--white); align-items: center; text-underline-offset: 4px; }
.isbn-back:hover { color: #cbd9f5; }
.isbn-workspace { display: grid; max-width: 1368px; margin: 0 auto; padding: 32px 24px 64px; grid-template-columns: 310px minmax(0, 1fr); align-items: start; gap: 32px; }
.isbn-entry h1 { margin: 0 0 10px; color: var(--navy); font-size: 26px; letter-spacing: -.03em; }
.isbn-entry > p { margin: 0 0 24px; }
.isbn-entry form { margin-bottom: 20px; }
.isbn-entry label { font-weight: 800; }
.isbn-help { color: #526078; font-size: 13px; line-height: 1.6; }
#inputHelp { margin: 5px 0 12px; }
#isbnInput { display: block; width: 100%; min-height: 250px; padding: 14px; border: 1px solid var(--line-strong); border-radius: var(--radius-small); background: var(--white); caret-color: var(--orange); font-size: 16px; line-height: 1.8; font-variant-numeric: tabular-nums; resize: vertical; }
#isbnInput::placeholder { color: #667085; opacity: 1; }
.isbn-primary, .isbn-secondary { display: inline-flex; min-height: 46px; padding: 10px 16px; border: 1px solid var(--navy); border-radius: var(--radius-small); align-items: center; justify-content: center; font-weight: 700; text-align: center; }
.isbn-primary { width: 100%; margin-top: 12px; background: var(--navy); color: var(--white); }
.isbn-primary:hover:not(:disabled) { background: var(--blue-strong); }
.isbn-secondary { background: var(--white); color: var(--navy); }
.isbn-secondary:hover:not(:disabled) { background: var(--blue-wash); }
.isbn-primary:disabled, .isbn-secondary:disabled { border-color: var(--line); background: #e8edf4; color: #606c80; }
.isbn-source { font-size: 13px; color: #526078; }
.isbn-source.is-error { color: var(--danger); }
.isbn-preview { min-width: 0; padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-small); background: var(--white); }
.isbn-preview-heading { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: start; gap: 16px; }
.isbn-preview h2 { margin: 0; color: var(--navy); font-size: 22px; letter-spacing: -.02em; }
.isbn-preview-heading p { margin: 5px 0 0; }
.isbn-summary { margin: 24px 0 16px; font-weight: 700; font-variant-numeric: tabular-nums; }
.isbn-notice { padding: 12px; border: 1px solid #e9bd9b; background: var(--orange-wash); color: #743000; font-size: 14px; }
.isbn-empty { padding: 64px 20px; border-block: 1px solid var(--line); color: #526078; text-align: center; }
.isbn-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.isbn-table th { padding: 12px 0; border-block: 1px solid var(--line); color: #526078; font-size: 12px; text-align: left; }
.isbn-table .isbn-quantity-heading { width: 104px; text-align: right; }
.isbn-table td { padding: 16px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.isbn-table td:last-child { padding-top: 20px; color: var(--navy); font-size: 21px; font-weight: 800; text-align: right; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.isbn-product { display: flex; min-width: 0; padding-right: 16px; gap: 16px; }
.isbn-cover { display: flex; width: 54px; height: 76px; flex: 0 0 54px; background: var(--canvas); color: #526078; align-items: center; justify-content: center; text-align: center; }
.isbn-cover span { padding: 4px; font-size: 10px; }
.isbn-cover img { display: none; max-width: 100%; width: 54px; height: 76px; object-fit: contain; }
.isbn-cover.is-loaded img { display: block; }
.isbn-cover.is-loaded span { display: none; }
.isbn-product-copy { min-width: 0; flex: 1; overflow-wrap: anywhere; }
.isbn-product-title { display: block; color: var(--ink); font-size: 15px; line-height: 1.4; }
.isbn-product-copy p { margin: 4px 0 0; font-size: 12px; color: #526078; }
.isbn-product-copy .isbn-row-warning { color: var(--danger); font-weight: 600; }
.isbn-choices { margin: 12px 0 0; padding: 0; border: 0; }
.isbn-choices legend { margin-bottom: 6px; color: var(--danger); font-size: 12px; font-weight: 700; }
.isbn-choice { display: flex; min-height: 44px; padding: 8px 0; gap: 8px; align-items: start; font-size: 12px; }
.isbn-choice input { width: 18px; height: 18px; margin: 0; flex: 0 0 18px; accent-color: var(--navy); }
.isbn-print-brand, .isbn-print-candidates { display: none; }
#previewDate:empty, #printStatus:empty { display: none; }
@media (max-width: 900px) {
  .isbn-workspace { grid-template-columns: 260px minmax(0, 1fr); gap: 20px; padding-inline: 16px; }
  .isbn-preview { padding: 18px; }
}
@media (max-width: 700px) {
  .isbn-masthead { padding: 12px 16px; flex-wrap: wrap; gap: 4px 16px; }
  .isbn-masthead .brand-name { font-size: 23px; }
  .isbn-workspace { grid-template-columns: minmax(0, 1fr); padding: 24px 12px 40px; gap: 24px; }
  .isbn-entry h1 { font-size: 24px; }
  #isbnInput { min-height: 180px; height: 220px; }
  .isbn-preview { padding: 16px 12px; }
  .isbn-preview-heading { gap: 12px; }
  #printButton { width: 100%; }
  .isbn-table .isbn-quantity-heading { width: 84px; font-size: 11px; }
  .isbn-product { padding-right: 8px; gap: 10px; }
  .isbn-cover { width: 42px; height: 62px; flex-basis: 42px; }
  .isbn-cover img { width: 42px; height: 62px; }
  .isbn-product-title { font-size: 14px; }
  .isbn-table td:last-child { font-size: 18px; }
}
@page { size: A4; margin: 14mm; }
@media print {
  html, body.isbn-page { min-width: 0; background: white; color: black; font-size: 10pt; }
  .isbn-masthead, .isbn-entry, .skip-link, .screen-only, #printButton, .isbn-choices { display: none !important; }
  .isbn-workspace { display: block; max-width: none; margin: 0; padding: 0; }
  .isbn-preview { padding: 0; border: 0; }
  .isbn-print-brand { display: block; margin: 0 0 12pt; font-weight: 700; }
  .isbn-preview h2 { font-size: 16pt; }
  .isbn-summary { margin: 12pt 0; }
  .isbn-table thead { display: table-header-group; }
  .isbn-table tr { break-inside: avoid; page-break-inside: avoid; }
  .isbn-table th { font-size: 9pt; }
  .isbn-table td { padding: 8pt 0; }
  .isbn-table td:last-child { padding-top: 10pt; font-size: 14pt; }
  .isbn-product-title { font-size: 10pt; }
  .isbn-product-copy p { font-size: 8pt; }
  .isbn-cover { width: 30px; height: 44px; flex-basis: 30px; }
  .isbn-cover img { width: 30px; height: 44px; }
  .isbn-cover span { font-size: 6pt; }
  .isbn-print-candidates { display: block; }
  .isbn-notice { padding: 8pt; background: white; color: black; border-color: #888; }
  #previewDate { margin-top: 12pt; font-size: 8pt; }
}