/* Guias Incríveis — sistema cinematográfico para páginas internas */
:root {
  --internal-ink: #111935;
  --internal-night: #0d142c;
  --internal-paper: #fffdf8;
  --internal-cream: #f5eee2;
  --internal-sand: #e9dcc7;
  --internal-muted: #687087;
  --internal-orange: #C89B3C;
  --internal-orange-dark: #9A6B22;
  --internal-green: #9bc9b4;
  --internal-blue: #a8cde2;
  --internal-gold: #e5bd69;
  --internal-line: rgba(17,25,53,.11);
  --internal-shadow: 0 26px 70px rgba(17,25,53,.12);
  --internal-ease: cubic-bezier(.23,1,.32,1);
}

body.internal-page {
  min-width: 320px;
  overflow-x: clip;
  background: var(--internal-paper);
  color: var(--internal-ink);
}

.internal-page .cinematic-header { color: var(--internal-ink); }
.internal-page .cinematic-header:not(.is-scrolled) {
  background: rgba(245,238,226,.8);
  border-bottom: 1px solid rgba(17,25,53,.06);
  backdrop-filter: blur(18px);
}
.internal-page .cinematic-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 12px;
  bottom: 13px;
  left: 12px;
  height: 2px;
  border-radius: 2px;
  background: var(--internal-orange);
}
.internal-page main { min-height: 70vh; }
.internal-page section { padding: 86px 0; }

/* Ensure detail pages (obra) start below the fixed header */
.internal-page[data-page="obra"] main {
  padding-top: 120px !important;
}

/* Responsive obra detail layout (React rendered) */
.obra-layout {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) 2fr;
  gap: 48px;
  align-items: start;
}
@media (max-width: 860px) {
  .obra-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .obra-layout .obra-cover-col {
    max-width: 280px;
    margin-left: auto;
    margin-right: auto;
  }
  .obra-layout .obra-cover-col img,
  .obra-layout .obra-cover-col > div {
    max-width: 100% !important;
  }
  /* Make share row and buttons wrap nicely on tiny screens */
  .obra-layout .share-buttons {
    flex-wrap: wrap !important;
  }
}
.internal-page .skip-link { z-index: 120; }

.internal-hero {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  padding: 155px 0 82px !important;
  background:
    radial-gradient(circle at 84% 18%, rgba(229,189,105,.28), transparent 26%),
    radial-gradient(circle at 10% 78%, rgba(155,201,180,.22), transparent 30%),
    linear-gradient(135deg, #f8f1e5 0%, #fffdf8 54%, #edf3ea 100%);
}
.internal-hero::before,
.internal-hero::after {
  content: "";
  position: absolute;
  pointer-events: none;
}
.internal-hero::before {
  top: 112px;
  right: 8vw;
  width: min(34vw, 480px);
  height: min(34vw, 480px);
  border: 1px solid rgba(17,25,53,.1);
  border-radius: 50%;
  box-shadow: 0 0 0 42px rgba(255,255,255,.28), 0 0 0 84px rgba(17,25,53,.025);
}
.internal-hero::after {
  inset: auto 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(17,25,53,.14), transparent);
}
.internal-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0,1.25fr) minmax(280px,.75fr);
  gap: clamp(52px,7vw,110px);
  align-items: end;
}
.internal-hero .section-kicker,
.internal-kicker {
  margin: 0 0 16px;
  color: var(--internal-orange-dark);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.internal-hero h1 {
  max-width: 15ch;
  margin: 0;
  font-family: var(--cinema-display, "Iowan Old Style", Charter, Georgia, serif);
  font-size: clamp(52px,6.3vw,88px);
  font-weight: 600;
  line-height: .96;
  letter-spacing: -.045em;
  text-wrap: balance;
}
.internal-hero h1 em { color: var(--internal-orange-dark); font-weight: inherit; }
.internal-hero .lead {
  max-width: 62ch;
  margin: 26px 0 0;
  color: var(--internal-muted);
  font-size: 17px;
  line-height: 1.7;
}
.hero-context {
  position: relative;
  padding: 28px 0 5px 30px;
  border-left: 1px solid rgba(17,25,53,.18);
}
.hero-context strong {
  display: block;
  margin-bottom: 10px;
  font-family: var(--cinema-display, Georgia, serif);
  font-size: 26px;
  font-weight: 600;
}
.hero-context p { margin: 0; color: var(--internal-muted); line-height: 1.65; }
.hero-context a { margin-top: 20px; }

.internal-section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 38px;
}
.internal-section-heading h2 {
  max-width: 17ch;
  margin: 0;
  font-family: var(--cinema-display, Georgia, serif);
  font-size: clamp(38px,4.4vw,60px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.035em;
}
.internal-section-heading p {
  max-width: 60ch;
  margin: 15px 0 0;
  color: var(--internal-muted);
  line-height: 1.65;
}

/* Catálogo */
.catalog-stage {
  padding: 70px 0 110px !important;
  background:
    linear-gradient(180deg, #fffdf8 0%, #f7f1e7 45%, #eef3ed 100%);
}
.catalog-layout {
  display: grid;
  grid-template-columns: 280px minmax(0,1fr);
  gap: clamp(28px,4vw,54px);
  align-items: start;
}
.filters { position: sticky; top: 108px; }
.filter-shell {
  max-height: calc(100vh - 132px);
  overflow-y: auto;
  padding: 26px 22px;
  border: 0;
  border-radius: 16px;
  background: rgba(255,253,248,.92);
  box-shadow: 0 22px 54px rgba(17,25,53,.09);
  scrollbar-width: thin;
}
.filter-head {
  position: sticky;
  top: -26px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: -26px -22px 14px;
  padding: 24px 22px 14px;
  background: linear-gradient(180deg,#fffdf8 78%,rgba(255,253,248,0));
}
.filter-head h2 {
  margin: 0;
  font-family: var(--cinema-display,Georgia,serif);
  font-size: 28px;
}
.filter-block { padding: 19px 0; border-top: 1px solid var(--internal-line); }
.filter-block h3 {
  margin: 0 0 12px;
  color: var(--internal-ink);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.filter-options { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-toggle { cursor: pointer; }
.chip-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.chip-toggle span {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  padding: 0 12px;
  border: 1px solid var(--internal-line);
  border-radius: 999px;
  background: transparent;
  color: var(--internal-muted);
  font-size: 11px;
  transition: 180ms var(--internal-ease);
}
.chip-toggle:hover span { border-color: rgba(200,155,60,.5); color: var(--internal-ink); }
.chip-toggle input:checked + span {
  border-color: var(--internal-ink);
  background: var(--internal-ink);
  color: white;
}
.chip-toggle input:focus-visible + span {
  outline: 3px solid var(--internal-orange);
  outline-offset: 2px;
}
.drawer-actions { margin-top: 12px; }
.filter-drawer-close { display: none; }

.catalog-main { min-width: 0; }
.catalog-search-panel {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: minmax(0,1fr) 210px auto;
  gap: 10px;
  margin: -116px 0 42px;
  padding: 14px;
  border-radius: 12px;
  background: rgba(255,253,248,.94);
  box-shadow: var(--internal-shadow);
  backdrop-filter: blur(18px);
}
.catalog-search-panel .search-input,
.catalog-search-panel .select {
  min-height: 54px;
  border: 0;
  border-radius: 4px;
  background: #f3eee5;
}
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}
.toolbar-meta { min-width: 0; }

.view-toggle {
  display: flex;
  gap: 4px;
}
.view-toggle button {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid #ccc;
  background: transparent;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #555;
  transition: all 150ms ease;
}
.view-toggle button:hover {
  border-color: #C89B3C;
  background: #f8f4eb;
}
.view-toggle button.active {
  background: #C89B3C;
  color: white;
  border-color: #C89B3C;
}
.applied-filters { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.filter-drawer-toggle { display: none; }
.promo-banner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
  margin-bottom: 28px;
  padding: 26px 30px;
  border: 0;
  border-radius: 4px;
  background:
    radial-gradient(circle at 90% 20%,rgba(229,189,105,.2),transparent 28%),
    var(--internal-night);
  color: white;
}
.promo-banner strong {
  display: block;
  max-width: 30ch;
  font-family: var(--cinema-display,Georgia,serif);
  font-size: 25px;
  font-weight: 600;
}
.promo-banner p { margin: 8px 0 0; color: rgba(255,255,255,.62); }
.catalog-results,
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4,minmax(0,1fr));
  gap: 20px;
}
.card {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  overflow: hidden;
  border: 0;
  border-radius: 6px;
  background: var(--internal-paper);
  box-shadow: 0 12px 34px rgba(17,25,53,.08);
  transition: transform 320ms var(--internal-ease),box-shadow 320ms var(--internal-ease);
}
.card:hover { transform: translateY(-8px); box-shadow: 0 26px 56px rgba(17,25,53,.15); }
.card-cover-wrap {
  position: relative;
  min-height: 300px;
  padding: 18px 18px 0;
  background: linear-gradient(145deg,#e9dfcf,#f7f1e8);
}
.card-cover-wrap .meta-row { position: relative; z-index: 2; }
.card .book-cover {
  width: 176px;
  height: 260px;
  margin: 8px auto -1px;
  border-radius: 4px 8px 8px 4px;
  box-shadow: -14px 20px 35px rgba(17,25,53,.24);
  transform: perspective(700px) rotateY(-5deg);
  transition: transform 360ms var(--internal-ease);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 10px;
  overflow: hidden;
  box-sizing: border-box;
}
.card:hover .book-cover { transform: perspective(700px) rotateY(-1deg) translateY(-5px) scale(1.025); }
.card .book-cover span { 
  font-size: clamp(12px, 4.5vw, 18px); 
  line-height: 1.1; 
  word-break: break-word;
  max-height: 100%;
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
}
.card-body { display: flex; flex: 1; flex-direction: column; padding: 22px; }
.card-body h3 {
  min-height: 2.25em;
  margin: 13px 0 8px;
  font-family: var(--cinema-display,Georgia,serif);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -.02em;
}
.card-body > p {
  display: -webkit-box;
  min-height: 4.5em;
  margin: 0;
  overflow: hidden;
  color: var(--internal-muted);
  font-size: 13px;
  line-height: 1.5;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}
.card .rating-row,
.card .card-price-line { display: none !important; }
.card-tags { margin-top: 15px; }
.card-actions {
  display: grid;
  grid-template-columns: 1fr 44px;
  gap: 8px;
  margin-top: auto;
  padding-top: 20px;
}
.card-actions .btn:first-child {
  background: var(--internal-orange);
  color: white;
}
.card-actions .btn:first-child:hover { background: var(--internal-orange-dark); }
.card-actions .js-save-book {
  width: 44px;
  overflow: hidden;
  padding: 0;
  color: transparent;
}
.card-actions .js-save-book::before {
  content: "♡";
  color: var(--internal-ink);
  font-size: 20px;
}
.card-actions .js-save-book[data-saved="true"]::before { content: "♥"; color: var(--internal-orange-dark); }
.amazon-availability {
  display: block;
  margin-top: 14px;
  color: var(--internal-muted);
  font-size: 11px;
}

/* Categorias */
.categories-stage {
  background:
    radial-gradient(circle at 18% 0,rgba(168,205,226,.3),transparent 28%),
    linear-gradient(180deg,#fffdf8,#f0e4d3);
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(12,1fr);
  gap: 16px;
}
.category-card {
  position: relative;
  display: flex;
  min-height: 330px;
  grid-column: span 4;
  flex-direction: column;
  overflow: hidden;
  padding: 28px;
  border: 0;
  border-radius: 16px;
  background: var(--internal-paper);
  box-shadow: 0 14px 38px rgba(17,25,53,.08);
  transition: 280ms var(--internal-ease);
}

/* Category cards now use full-bleed photos — ensure no conflicting solid gradients when image is set via inline style */
.category-grid .category-card {
  background-color: transparent;
}
.category-card:nth-child(1),
.category-card:nth-child(6) { grid-column: span 8; }
.category-card:nth-child(4n+1) { background: linear-gradient(145deg,#182550,#283f6e); color: white; }
.category-card:nth-child(4n+2) { background: linear-gradient(145deg,#b7ddc9,#e0ecd8); }
.category-card:nth-child(4n+3) { background: linear-gradient(145deg,#edc36d,#f5e4bd); }
.category-card:nth-child(4n+4) { background: linear-gradient(145deg,#d6c7df,#f0e2dd); }
.category-card:hover { transform: translateY(-6px); box-shadow: 0 26px 58px rgba(17,25,53,.14); }
.category-card .category-icon {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 16px;
  background: rgba(255,255,255,.5);
  font-weight: 850;
}
.category-card strong {
  max-width: 16ch;
  margin-top: auto;
  font-family: var(--cinema-display,Georgia,serif);
  font-size: 32px;
  font-weight: 600;
  line-height: 1;
}
.category-card p { max-width: 45ch; margin: 12px 0 18px; color: currentColor; opacity: .68; line-height: 1.55; }
.category-card .strip { display: flex; flex-wrap: wrap; gap: 7px; }
.category-card .category-footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 20px; }
.category-card:nth-child(4n+1) .btn { background: white; color: var(--internal-ink); }

/* Coleções */
.collections-stage {
  background:
    radial-gradient(circle at 85% 5%,rgba(155,201,180,.28),transparent 25%),
    linear-gradient(180deg,#fffdf8,#eee1cd);
}
.collections-grid {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: 18px;
}

.collection-card {
  position: relative;
  overflow: hidden;
  min-height: 430px;
  border-radius: 26px;
  box-shadow: 0 20px 50px rgba(17,25,53,.12);
  color: white;
  display: flex;
  flex-direction: column;
  transition: transform 800ms cubic-bezier(0.25, 0.1, 0.25, 1);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.collection-card:hover {
  transform: scale(1.05);
}

.collection-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: transform 800ms cubic-bezier(0.25, 0.1, 0.25, 1);
  z-index: 0;
  transform: scale(1);
}

.collection-card:hover .collection-bg {
  transform: scale(1.12);
}

.collection-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.65) 60%, rgba(0,0,0,0.75) 100%);
  z-index: 1;
}

.collection-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 34px;
  color: white;
}

.collection-card h3 {
  position: relative;
  z-index: 1;
  max-width: 13ch;
  margin: 18px 0 12px;
  font-family: var(--cinema-display,Georgia,serif);
  font-size: clamp(34px,4vw,48px);
  font-weight: 600;
  line-height: .98;
  text-shadow: 0 2px 8px rgba(0,0,0,0.6);
}

.collection-card p { 
  position: relative; 
  z-index: 1; 
  max-width: 52ch; 
  color: white; 
  opacity: .9; 
  line-height: 1.6; 
  text-shadow: 0 1px 4px rgba(0,0,0,0.5);
}

/* Detalhe */
.detail-stage { padding: 150px 0 100px !important; background: linear-gradient(135deg,#f7f0e4,#fffdf8 48%,#eaf1eb); }
.detail-grid {
  display: grid;
  grid-template-columns: 300px minmax(0,1fr) 270px;
  gap: clamp(30px,4vw,62px);
  align-items: start;
}
.detail-cover { position: sticky; top: 122px; }
.detail-cover .book-cover {
  width: 100%;
  height: 450px;
  border-radius: 5px 12px 12px 5px;
  box-shadow: -22px 30px 58px rgba(17,25,53,.26);
  transform: perspective(800px) rotateY(-5deg);
}
.detail-cover .book-cover span { font-size: 42px; }
.detail-copy h1 {
  max-width: 14ch;
  margin: 15px 0 18px;
  font-family: var(--cinema-display,Georgia,serif);
  font-size: clamp(48px,5.6vw,76px);
  font-weight: 600;
  line-height: .95;
  letter-spacing: -.045em;
}
.detail-copy .lead { color: var(--internal-muted); font-size: 18px; line-height: 1.65; }
.detail-rating,
.detail-copy .meta-block,
.detail-copy .detail-facts { display: none !important; }
.detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 38px;
}
.detail-actions .btn:first-child { background: var(--internal-orange); color: white; }
.detail-sections { display: grid; gap: 1px; background: var(--internal-line); }
.detail-panel {
  padding: 30px 0;
  border: 0;
  background: var(--internal-paper);
}
.detail-panel h2 {
  margin: 0 0 14px;
  font-family: var(--cinema-display,Georgia,serif);
  font-size: 30px;
  font-weight: 600;
}
.detail-panel p,
.detail-panel li { color: var(--internal-muted); line-height: 1.7; }
.detail-panel ul { padding-left: 20px; }
.side-panel {
  position: sticky;
  top: 122px;
  padding: 26px;
  border: 0;
  border-radius: 6px;
  background: rgba(255,253,248,.82);
  box-shadow: 0 18px 44px rgba(17,25,53,.09);
  backdrop-filter: blur(14px);
}
.side-panel h2,
.side-panel h3 { font-family: var(--cinema-display,Georgia,serif); font-weight: 600; }
.side-panel p,
.side-panel li { color: var(--internal-muted); line-height: 1.55; }
.side-panel ul { padding-left: 18px; }
.side-panel a { color: var(--internal-ink); text-underline-offset: 3px; }
.amazon-disclaimer {
  margin-top: -22px;
  color: var(--internal-muted);
  font-size: 11px;
  line-height: 1.5;
}

/* Biblioteca */
.library-stage {
  background:
    radial-gradient(circle at 82% 12%,rgba(229,189,105,.25),transparent 24%),
    linear-gradient(180deg,#fffdf8,#eee5d7);
}
.library-grid {
  display: grid;
  grid-template-columns: minmax(0,1.55fr) minmax(260px,.45fr);
  gap: 24px;
  align-items: start;
}
.library-stack { display: grid; gap: 22px; }
.library-stack .surface-card,
.history-card {
  padding: 30px;
  border: 0;
  border-radius: 16px;
  background: var(--internal-paper);
  box-shadow: 0 16px 42px rgba(17,25,53,.08);
}
.library-stack .surface-card:first-child {
  position: relative;
  overflow: hidden;
  min-height: 300px;
  padding: 38px;
  background:
    radial-gradient(circle at 88% 12%,rgba(200,155,60,.18),transparent 24%),
    var(--internal-night);
  color: white;
}
.library-stack .surface-card:first-child h2 {
  max-width: 14ch;
  font-family: var(--cinema-display,Georgia,serif);
  font-size: 42px;
  font-weight: 600;
  line-height: 1;
}
.library-stack .surface-card:first-child p,
.library-stack .surface-card:first-child .meta-subtle { color: rgba(255,255,255,.62); }
.library-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.history-card h2 {
  margin: 0 0 20px;
  font-family: var(--cinema-display,Georgia,serif);
  font-size: 27px;
  font-weight: 600;
}
.history-card ul { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.history-card li { padding: 14px 0; border-top: 1px solid var(--internal-line); color: var(--internal-muted); line-height: 1.45; }
.history-card a { color: var(--internal-ink); text-underline-offset: 3px; }

/* Rodapé compartilhado */
.internal-page .cinematic-footer { margin-top: 0; }
.internal-page .footer-main { grid-template-columns: 1.35fr .75fr .75fr 1fr; }
.filter-drawer-backdrop { display: none; }

@media (max-width: 1180px) {
  .catalog-results,.cards-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .detail-grid { grid-template-columns: 240px minmax(0,1fr); }
  .detail-grid > .side-panel { grid-column: 2; position: static; }
  .detail-cover .book-cover { height: 370px; }
}
@media (max-width: 980px) {
  .internal-hero-grid { grid-template-columns: 1fr; }
  .hero-context { max-width: 60ch; }
  .catalog-layout { grid-template-columns: 1fr; }
  .filters {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 130;
    width: min(390px,90vw);
    transform: translateX(-105%);
    transition: transform 220ms var(--internal-ease);
  }
  body.drawer-open .filters { transform: translateX(0); }
  .filter-shell { max-height: 100vh; min-height: 100%; border-radius: 0 16px 16px 0; }
  .filter-drawer-close,.filter-drawer-toggle { display: inline-flex; }
  .filter-drawer-backdrop {
    position: fixed;
    inset: 0;
    z-index: 125;
    background: rgba(13,20,44,.5);
    backdrop-filter: blur(3px);
  }
  body.drawer-open .filter-drawer-backdrop { display: block; }
  .catalog-search-panel { margin-top: -92px; }
  .category-card,.category-card:nth-child(1),.category-card:nth-child(6) { grid-column: span 6; }
  .detail-grid { grid-template-columns: 220px minmax(0,1fr); }
  .library-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .internal-page section { padding: 72px 0; }
  .internal-hero { min-height: auto; padding: 120px 0 105px !important; }
  .internal-hero h1 { font-size: clamp(46px,13vw,64px); }
  .internal-section-heading { align-items: start; flex-direction: column; }
  .catalog-search-panel { grid-template-columns: 1fr; margin-top: -102px; }
  .toolbar { align-items: flex-start; flex-direction: column; }
  .promo-banner { grid-template-columns: 1fr; }
  .catalog-results,.cards-grid { grid-template-columns: 1fr; }
  .card { max-width: 520px; }
  .card-cover-wrap { min-height: 340px; }
  .card .book-cover { width: 195px; height: 292px; }
  .category-grid { grid-template-columns: 1fr; }
  .category-card,.category-card:nth-child(1),.category-card:nth-child(6) { min-height: 300px; grid-column: auto; }
  .collections-grid { grid-template-columns: 1fr; }
  .collection-card { min-height: 380px; }
  .detail-stage { padding: 120px 0 76px !important; }
  .detail-grid { grid-template-columns: 1fr; }
  .detail-cover { position: static; width: min(72vw,290px); margin: 0 auto 16px; }
  .detail-cover .book-cover { height: 430px; }
  .detail-grid > .side-panel { grid-column: auto; }
  .detail-copy h1 { font-size: clamp(44px,13vw,64px); }
  .detail-actions .btn { width: 100%; }
  .library-stack .surface-card:first-child { padding: 30px 24px; }
  .internal-page .footer-main { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .card,.book-cover,.category-card,.chip-toggle span { transition-duration: 1ms !important; }
}

.internal-detail-link {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: flex-start;
  margin-top: 12px;
  color: var(--internal-ink);
  font-size: 12px;
  font-weight: 780;
  text-decoration: underline;
  text-decoration-color: rgba(17,25,53,.25);
  text-underline-offset: 4px;
}
.internal-detail-link:hover { text-decoration-color: var(--internal-orange); }
.internal-reveal { opacity: 0; transform: translateY(18px); transition: opacity 520ms var(--internal-ease), transform 520ms var(--internal-ease); }
.internal-reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .internal-reveal { opacity: 1; transform: none; }
}