/* Papers listing and product pages: aligned with the Books catalogue system. */
.papers-body {
  color: var(--navy);
  background: var(--catalogue-paper, var(--paper));
}

.papers-page-main,
.paper-detail-main {
  min-height: 100dvh;
  padding-top: var(--header-height);
}
/* Listing */
.papers-catalogue-hero .papers-catalogue-copy h1 {
  display: block;
  max-width: 13ch;
  margin-top: 0.65rem;
  font-size: var(--type-listing-title-size);
  letter-spacing: 0;
  line-height: var(--type-listing-title-line);
}

.papers-catalogue-hero .papers-catalogue-copy > p:last-child {
  max-width: 61ch;
}

.papers-body .papers-catalogue-hero-grid {
  align-items: center;
}

.papers-catalogue-summary {
  align-self: center;
}

.papers-catalogue-shell {
  display: block;
  max-width: 77.5rem;
}

.papers-results-panel {
  width: 100%;
  min-width: 0;
}

.papers-body .papers-toolbar {
  grid-template-columns: minmax(0, 1fr) 13rem;
  gap: 0.85rem 1.25rem;
}

.papers-body .papers-toolbar .catalogue-toolbar-heading {
  grid-column: 1 / -1;
}

.papers-search-state {
  display: flex;
  min-height: 44px;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.75rem;
  padding: 0.7rem 0;
  color: var(--catalogue-muted);
  border-bottom: 1px solid var(--catalogue-border);
  font-size: 0.82rem;
  font-weight: 700;
}

.papers-search-state[hidden] {
  display: none;
}

.papers-search-state button {
  min-height: 40px;
  padding: 0.45rem 0;
  color: var(--red);
  background: transparent;
  border: 0;
  font-size: 0.78rem;
  font-weight: 820;
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.papers-search-state button:hover,
.papers-search-state button:focus-visible {
  color: var(--red-deep);
}

.papers-page-main .papers-catalogue-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(0.85rem, 1.4vw, 1.15rem);
}

.papers-page-main .paper-catalogue-card {
  height: 100%;
}

.papers-page-main .paper-catalogue-card .catalogue-cover-link {
  padding: 0.7rem 0.7rem 0.25rem;
}

.papers-page-main .paper-catalogue-card .catalogue-cover-frame {
  height: 17.5rem;
  aspect-ratio: auto;
  padding: 0.1rem;
  background: var(--catalogue-surface-muted);
}

.papers-page-main .paper-catalogue-card .catalogue-cover-frame img {
  width: auto;
  max-width: 100%;
  height: 100%;
  object-fit: contain;
}

.papers-page-main .paper-catalogue-card .catalogue-book-content {
  gap: 0.34rem;
  padding: 0.62rem 0.75rem 0.75rem;
}

.papers-page-main .paper-catalogue-card .catalogue-book-category {
  max-width: 100%;
  overflow: hidden;
  font-size: 0.63rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.papers-page-main .paper-catalogue-card h3 {
  min-height: 4.6em;
  font-size: var(--type-card-title-size);
  letter-spacing: 0;
  line-height: var(--type-card-title-line);
}

.papers-page-main .paper-catalogue-card h3 a {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.papers-page-main .paper-catalogue-card .catalogue-book-contributors {
  display: -webkit-box;
  min-height: 2.6em;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  font-size: 0.74rem;
}

.papers-page-main .paper-catalogue-card .catalogue-book-detail-line {
  min-height: 1.35em;
  font-size: 0.68rem;
}

.papers-page-main .paper-catalogue-card .catalogue-commerce-row {
  gap: 0.48rem;
  padding-top: 0.5rem;
}

.papers-page-main .paper-catalogue-card .catalogue-price {
  font-size: 0.9rem;
}

.papers-page-main .paper-catalogue-card .catalogue-card-actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem;
}

.papers-page-main .paper-catalogue-card .catalogue-card-actions .button {
  min-width: 0;
  min-height: 40px;
  padding-inline: 0.42rem;
  font-size: 0.69rem;
}

.papers-page-main .paper-catalogue-card .catalogue-view-button {
  color: var(--white);
  background: var(--red);
  border-color: var(--red);
}

.papers-page-main .paper-catalogue-card .catalogue-view-button:hover,
.papers-page-main .paper-catalogue-card .catalogue-view-button:focus-visible {
  color: var(--white);
  background: var(--red-deep);
  border-color: var(--red-deep);
}

.papers-page-main .paper-catalogue-card .paper-add-cart {
  color: var(--navy);
  background: transparent;
  border-color: rgba(7, 20, 33, 0.26);
}

.papers-page-main .paper-catalogue-card .paper-add-cart:hover,
.papers-page-main .paper-catalogue-card .paper-add-cart:focus-visible {
  color: var(--white);
  background: var(--navy);
  border-color: var(--navy);
}

.papers-empty-state .button {
  margin-top: 1rem;
}
/* Keep Related Papers aligned with the compact related-book pattern. */
.paper-detail-body .paper-related-card .related-book-content strong {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}

.paper-detail-body .paper-related-cover-fallback {
  display: grid;
  width: 100%;
  aspect-ratio: 2 / 3;
  place-items: center;
  background: var(--catalogue-surface-muted);
  color: var(--red);
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 800;
}
/* Product header */
.paper-detail-body .paper-product-header {
  background: var(--catalogue-paper);
}

.paper-detail-body .paper-product-layout {
  grid-template-columns: minmax(13.5rem, 0.7fr) minmax(0, 1.35fr) minmax(19rem, 0.88fr);
  gap: clamp(1.7rem, 3vw, 3rem);
  align-content: center;
}

.paper-detail-body .paper-product-cover img {
  width: clamp(13.75rem, 19vw, 18.25rem);
  max-height: min(64dvh, 32rem);
  object-fit: contain;
}

.paper-detail-body .paper-detail-cover-fallback {
  display: grid;
  width: clamp(13.75rem, 19vw, 18.25rem);
  aspect-ratio: 2 / 3;
  place-items: center;
  padding: 1.5rem;
  color: var(--navy);
  background: var(--catalogue-surface-muted);
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 720;
  text-align: center;
}

.paper-detail-body .paper-detail-cover-fallback[hidden] {
  display: none;
}

.paper-detail-body .paper-product-copy h1 {
  max-width: 19ch;
  font-size: var(--type-product-title-size);
  letter-spacing: 0;
  line-height: var(--type-product-title-line);
  overflow-wrap: anywhere;
}

.paper-detail-body.has-long-product-title .paper-product-copy h1 {
  font-size: var(--type-product-title-long-size);
  line-height: var(--type-product-title-long-line);
}

.paper-detail-body .paper-product-copy .book-product-authors {
  color: var(--catalogue-muted);
}

.paper-detail-body .paper-product-copy .book-product-authors > span {
  color: var(--catalogue-muted);
}

.paper-detail-body .paper-product-copy .book-product-authors a {
  color: var(--red);
}

.paper-detail-body .paper-product-copy .book-product-summary {
  max-width: 60ch;
}

.paper-detail-body .paper-purchase-column {
  gap: 1.35rem;
}

.paper-detail-body .paper-purchase-direct h2::before {
  content: none;
}

.paper-detail-body .paper-institutional-enquiry {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.paper-detail-body .paper-institutional-enquiry h2 {
  color: var(--navy);
}

.paper-detail-body .paper-institutional-enquiry p {
  max-width: 36ch;
  margin: 0;
  color: var(--catalogue-muted);
  font-size: 0.76rem;
  line-height: 1.5;
}

.paper-institutional-link {
  display: inline-flex;
  width: fit-content;
  min-height: 40px;
  align-items: center;
  color: var(--red);
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.24em;
}

.paper-institutional-link:hover,
.paper-institutional-link:focus-visible {
  color: var(--red-deep);
}

.paper-detail-body .paper-detail-actions {
  margin-top: 0.05rem;
}

.paper-detail-body .paper-detail-actions .button {
  min-height: 42px;
}

.paper-detail-body .purchase-status:not(:empty) {
  padding: 0.55rem 0.65rem;
  background: var(--catalogue-surface-muted);
  border-left: 3px solid var(--gold);
}
/* Product information */
.paper-detail-body .paper-product-content-section {
  background: var(--catalogue-paper);
}

.paper-detail-body .product-book-info-section,
.paper-detail-body .product-author-band,
.paper-detail-body .paper-related-section {
  border-color: var(--line);
}

.paper-detail-body .paper-detail-author-panel .author-profile-card {
  max-width: 62rem;
}

.paper-detail-body .paper-detail-author-panel .author-profile-card h3 {
  margin-bottom: 0.65rem;
}

.paper-detail-body .paper-contents-list {
  display: grid;
  max-width: 68rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: paper-contents;
}

.paper-detail-body .paper-contents-list li {
  display: grid;
  min-height: 4rem;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
  padding: 0.85rem 1rem 0.85rem 0;
  color: var(--catalogue-muted);
  border-bottom: 1px solid var(--line);
  counter-increment: paper-contents;
  font-size: 0.9rem;
  line-height: 1.5;
}

.paper-detail-body .paper-contents-list li:nth-child(odd) {
  padding-right: 1.5rem;
}

.paper-detail-body .paper-contents-list li:nth-child(even) {
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
}

.paper-detail-body .paper-contents-list li::before {
  color: var(--red);
  content: counter(paper-contents, decimal-leading-zero);
  font-variant-numeric: tabular-nums;
  font-weight: 820;
}

.paper-detail-body [data-paper-contents-section][hidden],
.paper-detail-body [data-paper-author-section][hidden],
.paper-detail-body [data-paper-related-section][hidden] {
  display: none;
}

.paper-detail-body .paper-related-section .related-books-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.paper-detail-body .paper-related-card .related-book-link {
  height: 100%;
}

.paper-detail-body .paper-related-card img {
  object-fit: contain;
}

.paper-detail-body .product-not-found-card h1 {
  margin: 0 0 0.55rem;
  color: var(--navy);
  font-family: var(--serif);
}

.paper-detail-body .product-back-link:focus-visible,
.paper-detail-body .paper-institutional-link:focus-visible,
.paper-detail-body .paper-related-card a:focus-visible,
.papers-body .papers-search-state button:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

@media (max-width: 1120px) {
  .paper-detail-body .paper-product-layout {
    grid-template-columns: minmax(13rem, 0.65fr) minmax(0, 1.35fr);
  }

  .paper-detail-body .paper-purchase-column {
    grid-template-columns: minmax(0, 1.15fr) minmax(15rem, 0.85fr);
  }
}

@media (max-width: 1279px) {
  .papers-page-main .papers-catalogue-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 1023px) {
  .paper-detail-body .paper-related-section .related-books-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .papers-page-main .papers-catalogue-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 880px) {
  .paper-detail-body .paper-purchase-column {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .paper-detail-body .paper-related-section .related-books-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .papers-body .papers-catalogue-hero-grid {
    align-items: start;
  }

  .papers-catalogue-summary {
    align-self: stretch;
  }

  .papers-body .papers-toolbar {
    grid-template-columns: 1fr;
  }

  .papers-body .papers-toolbar .catalogue-toolbar-heading,
  .papers-body .papers-search-form {
    grid-column: 1;
  }

  .papers-page-main .papers-catalogue-grid {
    grid-template-columns: 1fr;
  }

  .papers-page-main .paper-catalogue-card {
    min-height: 0;
    grid-template-columns: 7.25rem minmax(0, 1fr);
  }

  .papers-page-main .paper-catalogue-card .catalogue-cover-link {
    padding: 0.5rem;
  }

  .papers-page-main .paper-catalogue-card .catalogue-cover-frame {
    width: 100%;
    height: auto;
    aspect-ratio: 2 / 3;
  }

  .papers-page-main .paper-catalogue-card .catalogue-book-content {
    gap: 0.25rem;
    padding: 0.58rem 0.58rem 0.62rem 0;
  }

  .papers-page-main .paper-catalogue-card h3,
  .papers-page-main .paper-catalogue-card .catalogue-book-contributors,
  .papers-page-main .paper-catalogue-card .catalogue-book-detail-line {
    min-height: 0;
  }

  .papers-page-main .paper-catalogue-card h3 a {
    -webkit-line-clamp: 3;
  }

  .papers-page-main .paper-catalogue-card .catalogue-book-contributors {
    -webkit-line-clamp: 1;
    font-size: 0.7rem;
  }

  .papers-page-main .paper-catalogue-card .catalogue-book-detail-line {
    display: block;
    font-size: 0.64rem;
  }

  .papers-page-main .paper-catalogue-card .catalogue-commerce-row {
    gap: 0.34rem;
    padding-top: 0.28rem;
  }

  .papers-page-main .paper-catalogue-card .catalogue-card-actions {
    gap: 0.32rem;
  }

  .papers-page-main .paper-catalogue-card .catalogue-card-actions .button {
    padding-inline: 0.3rem;
    font-size: 0.65rem;
  }

  .paper-detail-body .paper-related-card h3,
  .paper-detail-body .paper-related-card .catalogue-book-contributors,
  .paper-detail-body .paper-related-card .catalogue-book-detail-line {
    min-height: 0;
  }

  .paper-detail-body .paper-related-card h3 a {
    -webkit-line-clamp: 4;
  }

  .paper-detail-body .paper-product-layout,
  .paper-detail-body .paper-purchase-column {
    grid-template-columns: 1fr;
  }

  .paper-detail-body .paper-product-cover img,
  .paper-detail-body .paper-detail-cover-fallback {
    width: clamp(11.75rem, 58vw, 15rem);
  }

  .paper-detail-body .paper-product-copy h1 {
    max-width: 19ch;
  }

  .paper-detail-body .paper-contents-list {
    grid-template-columns: 1fr;
  }

  .paper-detail-body .paper-contents-list li,
  .paper-detail-body .paper-contents-list li:nth-child(odd),
  .paper-detail-body .paper-contents-list li:nth-child(even) {
    padding: 0.8rem 0;
    border-left: 0;
  }

  .paper-detail-body .paper-related-section .related-books-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 420px) {
  .papers-body .papers-search-row {
    grid-template-columns: 1fr;
  }

  .paper-detail-body .paper-detail-actions {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .paper-catalogue-card,
  .paper-catalogue-card img,
  .paper-product-cover img {
    transition: none;
  }
}