/* ==========================================================================
   Página do livro — livro.html
   Extensão do design system em main.css (tokens, .btn, .section, .tag…).
   Aqui ficam apenas os componentes específicos da página de venda.

   Índice
   1. Tokens locais e utilitários (placeholders, botões)
   2. Navegação (ajuste da página)
   3. Faixa e painel de preview
   4. Hero + galeria
   5. Sobre o livro
   6. Conteúdo (01 — 04)
   7. Ficha técnica
   8. Autora
   9. Compra (cartão, etapas, campos, frete, resumo)
   10. Estados do checkout (loading, sucesso, erro)
   11. CTA fixo (mobile)
   12. Movimento reduzido
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens locais e utilitários
   -------------------------------------------------------------------------- */
.book-page {
  --danger: #9b2c2c;
  --danger-soft: #fbeeee;
  --danger-border: #e8c4c4;
  --book-radius: var(--radius-lg);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) .book-page {
    --danger: #f0a3a3;
    --danger-soft: #241111;
    --danger-border: #4d2323;
  }
}

:root[data-theme='dark'] .book-page {
  --danger: #f0a3a3;
  --danger-soft: #241111;
  --danger-border: #4d2323;
}

/* Placeholder explícito — tudo que aguarda confirmação usa este selo */
.ph {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 0.1rem 0.55rem;
  font-family: var(--font-sans);
  font-size: 0.66rem;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.6;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px dashed var(--accent-border);
  border-radius: var(--radius-full);
  white-space: nowrap;
  vertical-align: middle;
}

.ph[hidden] {
  display: none;
}

/* Estoque (bookInfo): "Últimos exemplares" ou "Esgotado" ao lado do preço */
.stock-flag {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.55rem;
  font-family: var(--font-sans);
  font-size: 0.66rem;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1.6;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-full);
  white-space: nowrap;
  vertical-align: middle;
}

.stock-flag--out {
  color: var(--danger);
  background: var(--danger-soft);
  border-color: var(--danger-border);
}

.ph-text {
  color: var(--text-muted);
  font-style: italic;
}

.ph-block {
  padding: var(--sp-4) var(--sp-5);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-style: italic;
}

/* Imagens com width/height no HTML (evita CLS) mantêm a proporção via CSS */
:where(.book-page) img {
  height: auto;
}

/* Nav: o .container ocupa a altura toda para centralizar os itens */
.book-page .site-nav > .container {
  height: 100%;
}

/* Botões — modificadores de tamanho (base .btn vem de main.css) */
.book-page .btn {
  min-height: 2.75rem;
}

.btn--sm {
  min-height: 2.25rem !important;
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--fs-xs);
}

.btn--lg {
  min-height: 3.25rem;
  padding-inline: var(--sp-7);
}

.btn--block {
  width: 100%;
}

.btn[disabled],
.btn[aria-disabled='true'] {
  opacity: 0.55;
  cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   2. Navegação — a página tem poucos links: menu inline a partir de 1024px
   -------------------------------------------------------------------------- */
@media (min-width: 64rem) and (max-width: 79.9rem) {
  .book-page .site-nav__menu {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    padding: 0;
    gap: var(--sp-1);
    background: transparent;
    border: 0;
    box-shadow: none;
    max-height: none;
    overflow: visible;
  }

  .book-page .site-nav__link {
    width: auto;
    font-size: var(--fs-sm);
    padding: var(--sp-2) var(--sp-3);
  }

  .book-page .nav-toggle {
    display: none;
  }
}

.book-nav__cta {
  margin-inline-end: var(--sp-1);
}

@media (max-width: 22rem) {
  .book-nav__cta {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   3. Preview — faixa superior e painel de estados (somente ?preview=1)
   -------------------------------------------------------------------------- */
.preview-bar {
  margin-block-start: var(--nav-h);
  background: #141210;
  color: #f5f0e8;
  font-size: var(--fs-xs);
}

.preview-bar[hidden] {
  display: none;
}

.preview-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2) var(--sp-3);
  padding-block: var(--sp-2);
}

.preview-bar__inner p {
  flex: 1 1 16rem;
  line-height: var(--lh-snug);
}

.preview-bar__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: #c9a84c;
  box-shadow: 0 0 0 4px rgb(201 168 76 / 0.2);
  flex-shrink: 0;
}

.preview-bar__link {
  color: #e0c060;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.preview-bar:not([hidden]) + main .book-hero {
  padding-block-start: var(--sp-7);
}

.preview-panel {
  margin-block-end: var(--sp-5);
  padding: var(--sp-4) var(--sp-5);
  border: 1px dashed var(--accent-border);
  border-radius: var(--radius);
  background: var(--bg);
}

.preview-panel[hidden] {
  display: none;
}

.preview-panel summary {
  cursor: pointer;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.preview-panel__hint {
  margin-block: var(--sp-2) var(--sp-3);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.preview-panel__states {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.preview-panel__states button {
  min-height: 2.25rem;
  padding: var(--sp-1) var(--sp-3);
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.preview-panel__states button:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.preview-panel__states button[aria-pressed='true'] {
  color: var(--text-inverse);
  background: var(--accent);
  border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   4. Hero + galeria
   -------------------------------------------------------------------------- */
.book-hero {
  position: relative;
  overflow: hidden;
  padding-block: calc(var(--nav-h) + var(--sp-7)) var(--sp-9);
}

.book-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 78% 40%, rgb(from var(--accent-vivid) r g b / 0.09) 0%, transparent 55%),
    radial-gradient(ellipse at 10% 90%, rgb(from var(--accent-vivid) r g b / 0.05) 0%, transparent 45%);
  pointer-events: none;
}

.book-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-7);
  align-items: center;
}

@media (min-width: 64rem) {
  .book-hero__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: var(--sp-9);
  }

  .book-gallery {
    order: 2;
  }
}

.book-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-block-end: var(--sp-5);
}

.book-hero__title {
  font-size: clamp(2.4rem, 1.5rem + 2.8vw, 4rem);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-block-end: var(--sp-4);
  text-wrap: balance;
}

.book-hero__subtitle {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2) var(--sp-3);
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  margin-block-end: var(--sp-5);
}

.book-hero__author {
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-block-end: var(--sp-5);
}

.book-hero__author strong {
  color: var(--text);
  font-weight: 600;
}

.book-hero__desc {
  font-size: var(--fs-md);
  color: var(--text-muted);
  max-width: 52ch;
}

.book-price {
  margin-block: var(--sp-6);
  padding-block-start: var(--sp-5);
  border-block-start: 1px solid var(--border);
  max-width: 30rem;
}

.book-price__label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-block-end: var(--sp-1);
}

.book-price__value {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2) var(--sp-3);
  font-family: var(--font-serif);
  font-size: clamp(2rem, 1.6rem + 1.4vw, 2.75rem);
  font-weight: 400;
  line-height: 1.1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.book-price__note {
  margin-block-start: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.book-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.book-hero__perks {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3) var(--sp-6);
  margin-block-start: var(--sp-6);
}

.book-hero__perks li {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.book-hero__perks svg {
  width: 1.1rem;
  height: 1.1rem;
  color: var(--accent);
  flex-shrink: 0;
}

@media (max-width: 30rem) {
  .book-hero__actions .btn {
    width: 100%;
  }
}

/* Galeria */
.book-gallery {
  min-width: 0;
}

.book-gallery__stage {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--book-radius);
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at 50% 46%, rgb(from var(--accent-vivid) r g b / 0.16) 0%, transparent 62%),
    var(--surface);
  overflow: hidden;
  isolation: isolate;
}

/* Moldura dourada interna, como no hero do site */
.book-gallery__stage::before {
  content: '';
  position: absolute;
  inset: var(--sp-4);
  border: 1px solid var(--accent-vivid);
  border-radius: calc(var(--book-radius) - 6px);
  opacity: 0.28;
  pointer-events: none;
  z-index: 1;
}

.book-gallery__image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 3%;
  transition:
    opacity var(--dur-slow) var(--ease),
    transform var(--dur-slow) var(--ease);
}

.book-gallery__stage[data-fit='cover-art'] .book-gallery__image {
  padding: 13% 18%;
  filter: drop-shadow(0 22px 28px rgb(26 23 20 / 0.3)) drop-shadow(0 4px 6px rgb(26 23 20 / 0.18));
}

.book-gallery__stage[data-fit='scene'] .book-gallery__image {
  padding: 0;
  object-fit: cover;
}

.book-gallery__stage[data-fit='scene']::before {
  border-color: #fff;
  opacity: 0.45;
}

/* Fotos reais em fundo branco: o palco fica branco para a foto emendar sem moldura */
.book-gallery__stage[data-fit='photo'] {
  background: #fff;
}

.book-gallery__stage[data-fit='photo']::before {
  opacity: 0;
}

.book-gallery__stage[data-fit='photo'] .book-gallery__image {
  padding: 0;
}

.book-gallery__stage.is-swapping .book-gallery__image {
  animation: book-swap var(--dur-slow) var(--ease-out);
}

.book-gallery__nav {
  position: absolute;
  inset-block-start: 50%;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  translate: 0 -50%;
  color: #1a1714;
  background: rgb(255 255 255 / 0.88);
  border: 1px solid rgb(26 23 20 / 0.12);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  opacity: 0;
  transition:
    opacity var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.book-gallery__nav svg {
  width: 1.15rem;
  height: 1.15rem;
}

.book-gallery__nav--prev {
  inset-inline-start: var(--sp-3);
}

.book-gallery__nav--next {
  inset-inline-end: var(--sp-3);
}

.book-gallery__nav:hover {
  background: #fff;
}

.book-gallery__stage:hover .book-gallery__nav,
.book-gallery__nav:focus-visible {
  opacity: 1;
}

/* Toque: setas sempre visíveis (não há hover) */
@media (hover: none) {
  .book-gallery__nav {
    opacity: 1;
  }
}

.book-gallery__count {
  position: absolute;
  inset-block-end: var(--sp-3);
  inset-inline-end: var(--sp-3);
  z-index: 2;
  padding: 0.1rem 0.55rem;
  font-size: 0.7rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: #fff;
  background: rgb(26 23 20 / 0.55);
  border-radius: var(--radius-full);
}

@keyframes book-swap {
  from {
    opacity: 0;
    transform: scale(0.985);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (hover: hover) {
  .book-gallery__stage[data-fit='cover-art']:hover .book-gallery__image {
    transform: translateY(-4px);
  }
}

.book-gallery__badge {
  position: absolute;
  inset-block-start: var(--sp-5);
  inset-inline-start: var(--sp-5);
  z-index: 2;
  padding: 0.15rem 0.6rem;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgb(from var(--bg) r g b / 0.85);
  border: 1px dashed var(--accent-border);
  border-radius: var(--radius-full);
}

.book-gallery__thumbs {
  display: flex;
  gap: var(--sp-3);
  margin-block-start: var(--sp-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 3px;
  scrollbar-width: none;
}

.book-gallery__thumbs::-webkit-scrollbar {
  display: none;
}

.thumb {
  flex: 0 0 auto;
  width: 4.75rem;
  height: 4.75rem;
  padding: 0.35rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  scroll-snap-align: start;
  transition:
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.thumb[data-fit='photo'] {
  padding: 0;
  overflow: hidden;
  background: #fff;
}

.thumb[data-fit='photo'] img {
  object-fit: cover;
  border-radius: 0;
}

.thumb:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.thumb.is-active,
.thumb[aria-pressed='true'] {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

@media (max-width: 30rem) {
  .thumb {
    width: 4.25rem;
    height: 4.25rem;
  }
}

/* Mobile: o palco não ocupa a tela inteira */
@media (max-width: 63.9rem) {
  .book-gallery {
    max-width: 34rem;
    margin-inline: auto;
    width: 100%;
  }
}

@media (max-width: 47.9rem) {
  .book-gallery__stage {
    aspect-ratio: 5 / 4;
  }

  .book-gallery__stage[data-fit='cover-art'] .book-gallery__image {
    padding: 9% 22%;
  }
}

/* --------------------------------------------------------------------------
   5. Sobre o livro
   -------------------------------------------------------------------------- */
.book-about__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-8);
  align-items: center;
}

@media (min-width: 52rem) {
  .book-about__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: var(--sp-9);
  }
}

.book-about__title {
  font-weight: 400;
}

.book-about__title em,
.book-hero__title em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}

.book-about__text {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.book-about__lead {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  font-weight: 300;
  line-height: var(--lh-snug);
  color: var(--text);
}

.book-about__body {
  font-size: var(--fs-md);
  color: var(--text-muted);
  max-width: 58ch;
}

.book-about__source {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.book-about__source code {
  font-size: 0.95em;
  padding: 0 var(--sp-1);
  background: var(--surface-2);
  border-radius: var(--radius-sm);
}

.book-about__figure {
  position: relative;
  margin: 0;
}

.book-about__figure::before {
  content: '';
  position: absolute;
  inset: -0.75rem 0.75rem 0.75rem -0.75rem;
  border: 1px solid var(--accent-vivid);
  border-radius: var(--book-radius);
  opacity: 0.3;
  pointer-events: none;
}

.book-about__figure img {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--book-radius);
}

.book-about__figure figcaption {
  margin-block-start: var(--sp-3);
  font-size: var(--fs-xs);
  letter-spacing: 0.05em;
  color: var(--text-muted);
  text-align: center;
}

/* --------------------------------------------------------------------------
   6. Conteúdo — lista editorial 01 — 04
   -------------------------------------------------------------------------- */
.book-contents__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  column-gap: var(--sp-8);
  counter-reset: none;
}

@media (min-width: 48rem) {
  .book-contents__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.book-topic {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--sp-5);
  padding-block: var(--sp-6);
  border-block-start: 1px solid var(--border);
}

/* Filete dourado que “cresce” no hover */
.book-topic::before {
  content: '';
  position: absolute;
  inset-block-start: -1px;
  inset-inline-start: 0;
  width: 3rem;
  height: 1px;
  background: var(--accent-vivid);
  transform-origin: left;
  transition: transform var(--dur-slow) var(--ease);
}

.book-topic:hover::before {
  transform: scaleX(2.5);
}

.book-topic__num {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 1.8rem + 1.5vw, 3rem);
  font-weight: 300;
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: lining-nums;
}

.book-topic__title {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-block-end: var(--sp-2);
}

.book-topic__desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   7. Ficha técnica
   -------------------------------------------------------------------------- */
.book-details__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-7);
  align-items: start;
}

@media (min-width: 52rem) {
  .book-details__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.3fr);
    gap: var(--sp-9);
  }

  /* O título acompanha a rolagem da ficha, em vez de deixar a coluna vazia */
  .book-details__intro {
    position: sticky;
    top: calc(var(--nav-h) + var(--sp-6));
  }
}

/* Capa e contracapa ao lado da ficha — só com duas colunas; no celular a galeria já mostra */
.book-details__image {
  display: none;
}

@media (min-width: 52rem) {
  .book-details__image {
    display: block;
    width: 100%;
    margin-block-start: var(--sp-7);
    padding: var(--sp-4);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--book-radius);
    box-shadow: var(--shadow);
  }
}

.book-specs {
  margin: 0;
  border-block-start: 1px solid var(--border-strong);
}

.book-specs__row {
  display: grid;
  grid-template-columns: minmax(7rem, 11rem) minmax(0, 1fr);
  gap: var(--sp-4);
  align-items: baseline;
  padding-block: var(--sp-4);
  border-block-end: 1px solid var(--border);
}

.book-specs dt {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.book-specs dd {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  color: var(--text);
}

/* Observação abaixo do valor (ex.: "Brochura com orelhas"). É bloco: não depende de
   espaço no texto. O separador ". " fica invisível na tela, mas separa as partes
   sem CSS, no leitor de tela e ao copiar ("Livro físico. Brochura com orelhas"); o
     não é descartado no fim da linha, como aconteceria com um espaço comum */
.book-specs__sep {
  font-size: 0;
}

.book-specs__hint {
  display: block;
  margin-block-start: var(--sp-1);
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

@media (max-width: 30rem) {
  .book-specs__row {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--sp-1);
  }
}

/* --------------------------------------------------------------------------
   8. Autora
   -------------------------------------------------------------------------- */
.book-author__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-7);
  align-items: center;
}

@media (min-width: 52rem) {
  .book-author__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: var(--sp-9);
  }
}

.book-author__image-wrap {
  position: relative;
}

.book-author__image-wrap::before {
  content: '';
  position: absolute;
  inset: -0.75rem -0.75rem 0.75rem 0.75rem;
  border: 1px solid var(--accent-vivid);
  border-radius: var(--book-radius);
  opacity: 0.3;
  pointer-events: none;
}

.book-author__image {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 63% center;
  border-radius: var(--book-radius);
  background: var(--surface-2);
}

@media (max-width: 51.9rem) {
  .book-author__image {
    aspect-ratio: 4 / 3;
    object-position: 64% 30%;
  }
}

.book-author__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-4);
}

.book-author__content .section__title {
  margin-block-end: 0;
}

.book-author__bio {
  font-size: var(--fs-md);
  color: var(--text-muted);
  max-width: 58ch;
}

.book-author__award {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  font-style: italic;
  color: var(--text);
}

.book-author__award svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--accent);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   9. Compra
   -------------------------------------------------------------------------- */
.book-buy__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-7);
  align-items: start;
}

@media (min-width: 64rem) {
  .book-buy__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--sp-9);
  }

  .book-buy__aside {
    position: sticky;
    inset-block-start: calc(var(--nav-h) + var(--sp-6));
  }
}

.book-buy__main {
  min-width: 0;
  max-width: 40rem;
  width: 100%;
}

@media (max-width: 63.9rem) {
  .book-buy__main {
    margin-inline: auto;
  }
}

.book-buy__product {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
  padding: var(--sp-4);
  margin-block: var(--sp-5) var(--sp-6);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.book-buy__product img {
  width: 4.5rem;
  flex-shrink: 0;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: #fff;
  border-radius: 2px;
  box-shadow: var(--shadow);
}

.book-buy__product-title {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  font-weight: 600;
  line-height: var(--lh-snug);
}

.book-buy__product-author {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.book-buy__product-price {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  margin-block-start: var(--sp-2);
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  font-variant-numeric: tabular-nums;
}

/* Selos longos ("Indisponível no momento") quebram linha na coluna estreita do cartão */
.book-buy__product > div {
  min-width: 0;
}

.book-buy__product-price .ph {
  white-space: normal;
}

/* Confiança */
.book-trust {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
}

@media (min-width: 40rem) and (max-width: 63.9rem) {
  .book-trust {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.book-trust__item {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
}

.book-trust__item svg {
  width: 1.25rem;
  height: 1.25rem;
  margin-block-start: 0.15rem;
  color: var(--accent);
  flex-shrink: 0;
}

.book-trust__item strong {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text);
}

.book-trust__item span {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.book-trust__item a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

/* Cartão de compra */
.buy-card {
  position: relative;
  padding: var(--sp-6);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--book-radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.buy-card::before {
  content: '';
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  height: 2px;
  background: linear-gradient(to right, transparent, var(--accent-vivid), transparent);
}

@media (max-width: 30rem) {
  .buy-card {
    padding: var(--sp-5) var(--sp-4);
  }
}

.buy-step {
  min-width: 0;
  margin: 0 0 var(--sp-6);
  padding: 0 0 var(--sp-6);
  border: 0;
  border-block-end: 1px solid var(--border);
}

.buy-step:last-child {
  margin-block-end: 0;
  padding-block-end: 0;
  border-block-end: 0;
}

.buy-step__legend {
  float: left; /* evita o recorte padrão de <legend> na borda do fieldset */
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0;
  margin-block-end: var(--sp-5);
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--text);
}

.buy-step__legend + * {
  clear: both;
}

.buy-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  border-radius: 50%;
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.buy-step.is-current .buy-step__num,
.buy-step.is-done .buy-step__num {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-inverse);
}

.buy-step__sub {
  margin-block: var(--sp-6) var(--sp-4);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Campos */
.buy-field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  min-width: 0;
}

.buy-field + .buy-field {
  margin-block-start: var(--sp-4);
}

.buy-grid .buy-field + .buy-field {
  margin-block-start: 0;
}

.buy-field label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.buy-field__optional {
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: none;
}

.buy-field__hint {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.buy-field--inline {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

.buy-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
}

@media (min-width: 30rem) {
  .buy-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .buy-grid > .buy-field {
    grid-column: span 2;
  }

  .buy-grid > .buy-field--half {
    grid-column: span 3;
  }

  .buy-grid > .buy-field--wide {
    grid-column: span 4;
  }

  .buy-grid > .buy-field--full {
    grid-column: 1 / -1;
  }
}

.input {
  width: 100%;
  min-height: 3rem;
  padding: 0 var(--sp-4);
  font-size: 1rem; /* ≥16px evita zoom automático no iOS */
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  transition:
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.input::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

.input:hover {
  border-color: var(--accent-border);
}

.input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgb(from var(--accent-vivid) r g b / 0.28);
}

.input:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.input--readonly,
.input[readonly] {
  background: var(--surface);
  color: var(--text-muted);
  border-style: dashed;
}

select.input {
  appearance: none;
  padding-inline-end: 2.5rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b6914' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 1rem;
  cursor: pointer;
}

.buy-card [aria-invalid='true'] {
  border-color: var(--danger);
}

/* Quantidade */
.qty {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
}

.qty__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  color: var(--text);
  background: transparent;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  transition:
    color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.qty__btn:hover {
  color: var(--accent);
  background: var(--surface);
}

.qty__btn svg {
  width: 1rem;
  height: 1rem;
}

.qty__input {
  width: 3rem;
  font-size: var(--fs-md);
  font-weight: 600;
  text-align: center;
  color: var(--text);
  background: transparent;
  border: 0;
  font-variant-numeric: tabular-nums;
  -moz-appearance: textfield;
  appearance: textfield;
}

.qty__input::-webkit-outer-spin-button,
.qty__input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* CEP */
.cep-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.cep-row .input {
  flex: 1 1 9rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.cep-row .btn {
  flex: 0 0 auto;
  min-height: 3rem;
}

@media (max-width: 22rem) {
  .cep-row .btn {
    flex: 1 1 100%;
  }
}

/* Opções de frete — estiliza tanto o markup do book.js quanto o do preview */
.shipping-options:empty,
.shipping-options[hidden],
#delivery-shipping[hidden],
#delivery-address[hidden] {
  display: none;
}

.shipping-options {
  margin-block-start: var(--sp-5);
}

/* Forma de entrega fica logo abaixo da quantidade, antes do CEP */
.delivery-mode {
  margin-block: var(--sp-4) var(--sp-5);
}

.shipping-options__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-block-end: var(--sp-3);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.shipping-options label {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4);
  margin-block-start: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.shipping-options label:hover {
  border-color: var(--border-strong);
}

.shipping-options label:has(input:checked) {
  border-color: var(--accent);
  background: rgb(from var(--accent-soft) r g b / 0.45);
  box-shadow: 0 0 0 1px var(--accent);
}

.shipping-options input[type='radio'] {
  width: 1.1rem;
  height: 1.1rem;
  margin: 0;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.ship-opt__main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.ship-opt__name {
  font-weight: 600;
}

.ship-opt__eta {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.ship-opt__price {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* Skeleton de frete */
.ship-loading {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-block-end: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.skeleton {
  height: 4.25rem;
  margin-block-start: var(--sp-3);
  border-radius: var(--radius);
  background: linear-gradient(
    100deg,
    var(--surface) 30%,
    rgb(from var(--surface-3) r g b / 0.9) 50%,
    var(--surface) 70%
  );
  background-size: 250% 100%;
  animation: book-shimmer 1.4s ease-in-out infinite;
}

.skeleton + .skeleton {
  opacity: 0.7;
}

@keyframes book-shimmer {
  from {
    background-position: 100% 0;
  }
  to {
    background-position: -50% 0;
  }
}

.spinner {
  display: inline-block;
  width: 1.1rem;
  height: 1.1rem;
  border: 2px solid rgb(from var(--accent-vivid) r g b / 0.25);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: book-spin 0.8s linear infinite;
  flex-shrink: 0;
}

.spinner--lg {
  width: 2.75rem;
  height: 2.75rem;
  border-width: 2px;
}

@keyframes book-spin {
  to {
    transform: rotate(360deg);
  }
}

/* Cupom */
.coupon {
  margin-block-end: var(--sp-5);
}

.coupon__input {
  text-transform: uppercase;
}

.coupon__status:empty {
  display: none;
}

.coupon__status[data-state='success'] {
  color: var(--accent);
}

.coupon__status[data-state='error'] {
  color: var(--danger);
}

.order-summary__row[hidden] {
  display: none;
}

.order-summary__row--discount span:last-child {
  color: var(--accent);
}

/* Resumo */
.order-summary {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-block-end: var(--sp-5);
}

.order-summary__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--sp-4);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.order-summary__row span:last-child {
  color: var(--text);
  text-align: end;
  font-variant-numeric: tabular-nums;
}

.order-summary__row--total {
  margin-block-start: var(--sp-2);
  padding-block-start: var(--sp-4);
  border-block-start: 1px solid var(--border-strong);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
}

.order-summary__row--total span:last-child {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  letter-spacing: 0;
  text-transform: none;
}

.buy-card__secure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  margin-block-start: var(--sp-4);
  font-size: var(--fs-xs);
  color: var(--text-muted);
  text-align: center;
}

.buy-card__secure svg {
  width: 0.95rem;
  height: 0.95rem;
  color: var(--accent);
  flex-shrink: 0;
}

/* Mensagens do book.js (#messages) */
.message {
  margin-block-start: var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--fs-sm);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text-muted);
}

.message--success {
  background: rgb(from var(--accent-soft) r g b / 0.6);
  border-color: var(--accent-border);
  color: var(--text);
}

.message--error {
  background: var(--danger-soft);
  border-color: var(--danger-border);
  color: var(--danger);
}

/* --------------------------------------------------------------------------
   10. Estados do checkout
   -------------------------------------------------------------------------- */
.buy-card__result[hidden] {
  display: none;
}

.buy-card[data-state='success'] .buy-card__flow,
.buy-card[data-state='error'] .buy-card__flow {
  display: none;
}

/* Processando: sobreposição suave sobre o formulário */
.buy-card[data-state='processing'] .buy-card__result {
  position: absolute;
  inset: 0;
  z-index: 3;
  padding: var(--sp-8) var(--sp-5);
  text-align: center;
  background: rgb(from var(--bg) r g b / 0.86);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  animation: book-fade var(--dur-slow) var(--ease-out);
}

/* Fica no meio da tela mesmo com o cartão mais alto que o viewport */
.checkout-processing {
  position: sticky;
  inset-block-start: calc(50svh - 5rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
}

.checkout-processing__title {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  color: var(--text);
}

.checkout-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
  padding-block: var(--sp-5);
  text-align: center;
  animation: book-fade var(--dur-slow) var(--ease-out);
}

@keyframes book-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.checkout-result__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
}

.checkout-result__icon svg {
  width: 1.75rem;
  height: 1.75rem;
}

.checkout-result--error .checkout-result__icon {
  color: var(--danger);
  background: var(--danger-soft);
  border-color: var(--danger-border);
}

.checkout-result__title {
  font-size: var(--fs-2xl);
  font-weight: 400;
  line-height: var(--lh-tight);
}

.checkout-result__lead {
  max-width: 34ch;
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.checkout-result__order {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.checkout-result__order strong {
  font-family: var(--font-serif);
  font-size: var(--fs-lg);
  letter-spacing: 0.04em;
  color: var(--text);
}

.checkout-result .order-summary {
  width: 100%;
  margin: 0;
  padding: var(--sp-4) var(--sp-5);
  background: var(--surface);
  border-radius: var(--radius);
  text-align: start;
}

.checkout-steps {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  text-align: start;
  counter-reset: step;
}

.checkout-steps__title {
  align-self: flex-start;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.checkout-steps li {
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr);
  gap: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.checkout-steps li::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  border-radius: 50%;
}

.checkout-steps strong {
  display: block;
  color: var(--text);
  font-weight: 600;
}

.checkout-result__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-3);
  width: 100%;
}

@media (max-width: 30rem) {
  .checkout-result__actions .btn {
    width: 100%;
  }
}

.checkout-result__link {
  font-size: var(--fs-sm);
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

/* --------------------------------------------------------------------------
   11. CTA fixo (mobile/tablet)
   -------------------------------------------------------------------------- */
.buy-sticky {
  display: none;
}

@media (max-width: 63.9rem) {
  .buy-sticky {
    display: block;
    position: fixed;
    inset-inline: 0;
    inset-block-end: 0;
    z-index: 95;
    padding: var(--sp-3) var(--sp-4) calc(var(--sp-3) + env(safe-area-inset-bottom, 0px));
    padding-inline: max(var(--sp-4), env(safe-area-inset-left, 0px));
    background: rgb(from var(--bg) r g b / 0.94);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-block-start: 1px solid var(--border);
    box-shadow: 0 -8px 24px rgb(26 23 20 / 0.08);
    transform: translateY(105%);
    visibility: hidden;
    transition:
      transform var(--dur-slow) var(--ease),
      visibility 0s linear var(--dur-slow);
  }

  .buy-sticky.is-visible {
    transform: none;
    visibility: visible;
    transition:
      transform var(--dur-slow) var(--ease),
      visibility 0s;
  }

  .buy-sticky__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
    max-width: 40rem;
    margin-inline: auto;
  }

  .buy-sticky__info {
    display: flex;
    flex-direction: column;
    min-width: 0;
  }

  .buy-sticky__title {
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
  }

  .buy-sticky__price {
    font-family: var(--font-serif);
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--text);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
  }

  .buy-sticky .btn {
    min-height: 3rem;
    padding-inline: var(--sp-7);
  }

  /* Reserva espaço para o CTA não cobrir o rodapé */
  .book-page .site-footer {
    padding-block-end: calc(var(--sp-6) + 5rem + env(safe-area-inset-bottom, 0px));
  }

  /* WhatsApp sobe quando o CTA fixo está visível */
  .book-page .whatsapp-float {
    transition:
      transform var(--dur) var(--ease),
      box-shadow var(--dur) var(--ease),
      inset-block-end var(--dur-slow) var(--ease);
  }

  .book-page.sticky-on .whatsapp-float {
    inset-block-end: calc(5.75rem + env(safe-area-inset-bottom, 0px));
  }

  /* Na área de compra o botão flutuante cobriria o formulário;
     o suporte continua acessível no bloco de confiança */
  .book-page.buy-in-view .whatsapp-float {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
  }
}

/* --------------------------------------------------------------------------
   Ajustes mobile gerais
   -------------------------------------------------------------------------- */
@media (max-width: 47.9rem) {
  .book-hero {
    padding-block: calc(var(--nav-h) + var(--sp-6)) var(--sp-7);
  }

  .preview-bar:not([hidden]) + main .book-hero {
    padding-block-start: var(--sp-6);
  }

  .book-hero__desc {
    font-size: var(--fs-base);
  }

  .book-price {
    margin-block: var(--sp-5);
  }

  .book-about__lead {
    font-size: var(--fs-lg);
  }

  .book-topic {
    gap: var(--sp-4);
    padding-block: var(--sp-5);
  }
}

/* --------------------------------------------------------------------------
   12. Movimento reduzido
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .skeleton,
  .spinner,
  .checkout-result,
  .buy-card[data-state='processing'] .buy-card__result {
    animation: none;
  }

  .spinner {
    border-top-color: var(--accent);
    border-right-color: var(--accent);
  }

  .book-gallery__stage.is-swapping .book-gallery__image {
    animation: none;
  }
}