/* ——— Book detail page ——— */
.book-page {
  background: var(--color-cream);
  overflow-x: hidden;
}

/* Hero */
.book-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 2.5vw, 2rem) 0 clamp(1.5rem, 3vw, 2.25rem);
  background: linear-gradient(
    128deg,
    var(--color-primary-pale) 0%,
    var(--color-cream) 48%,
    rgba(240, 235, 227, 0.7) 100%
  );
  border-bottom: 1px solid var(--color-border);
}

.book-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 90% at 100% 30%, rgba(var(--color-primary-rgb), 0.1) 0%, transparent 65%),
    radial-gradient(ellipse 35% 55% at 0% 100%, rgba(184, 149, 108, 0.09) 0%, transparent 60%);
  pointer-events: none;
}

.book-hero__inner {
  position: relative;
  z-index: 1;
}

.book-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-size: var(--font-size-sm);
}

.book-breadcrumb__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--duration-fast);
}

.book-breadcrumb__link:hover {
  color: var(--color-ink);
}

.book-breadcrumb__sep,
.book-breadcrumb__current {
  color: var(--color-ink-muted);
}

.book-hero .section__label {
  margin-bottom: 0.35rem;
}

.book-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3.2vw, var(--font-size-3xl));
  line-height: var(--line-height-tight);
  margin: 0 0 0.35rem;
  color: var(--color-ink);
  max-width: 42rem;
}

.book-hero__author {
  margin: 0;
  font-size: var(--font-size-base);
  color: var(--color-ink-muted);
}

/* Main layout */
.book-detail {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-2xl);
}

.book-detail__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(1.5rem, 3vw, var(--space-xl));
  align-items: start;
}

/* Gallery card */
.book-detail__gallery-card {
  position: sticky;
  top: calc(var(--header-height) + var(--space-md));
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

.book-detail__gallery-card:hover {
  box-shadow: var(--shadow-lg);
}

.book-detail__cover-wrap,
.book-slider__viewport {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(145deg, var(--color-cream-dark), var(--color-primary-pale));
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.6) inset,
    0 12px 40px rgba(26, 31, 46, 0.12);
}

.book-detail__cover-wrap::after,
.book-slider__viewport::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(26, 31, 46, 0.06);
}

.book-detail__cover,
.book-slide img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

/* Slider */
.book-slider {
  position: relative;
}

.book-slider__track {
  position: relative;
}

.book-slide {
  display: none;
}

.book-slide.is-active {
  display: block;
  animation: bookSlideIn var(--duration-normal) var(--ease-out);
}

@keyframes bookSlideIn {
  from { opacity: 0.6; transform: scale(1.01); }
  to { opacity: 1; transform: scale(1); }
}

.book-slider__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--color-border-strong);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.96);
  color: var(--color-ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: background var(--duration-fast), border-color var(--duration-fast), color var(--duration-fast), transform var(--duration-fast);
  z-index: 2;
}

.book-slider__btn:hover {
  background: var(--color-white);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-50%) scale(1.05);
}

.book-slider__btn--prev { left: 0.75rem; }
.book-slider__btn--next { right: 0.75rem; }

.book-slider__dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: var(--space-sm);
}

.book-slider__dot {
  width: 0.5rem;
  height: 0.5rem;
  border: none;
  border-radius: 50%;
  background: var(--color-border-strong);
  cursor: pointer;
  padding: 0;
  transition: transform var(--duration-fast), background var(--duration-fast), width var(--duration-fast);
}

.book-slider__dot.is-active {
  background: var(--color-primary);
  width: 1.25rem;
  border-radius: 999px;
}

.book-detail__description {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.book-detail__description-title {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  margin: 0 0 var(--space-sm);
  color: var(--color-ink);
}

.book-detail__description-text {
  color: var(--color-ink-soft);
  line-height: var(--line-height-body);
  font-size: var(--font-size-base);
}

/* Order card */
.book-detail__order-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0;
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.book-detail__order-card::before {
  content: '';
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold-light));
}

.book-detail__header,
.book-detail__meta,
.book-detail__price-wrap,
.book-order-form {
  padding-left: clamp(1.25rem, 2.5vw, var(--space-lg));
  padding-right: clamp(1.25rem, 2.5vw, var(--space-lg));
}

.book-detail__header {
  padding-top: clamp(1.25rem, 2.5vw, var(--space-lg));
  padding-bottom: var(--space-sm);
}

.book-detail__header-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: var(--space-sm);
}

.book-detail__tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-pale);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
  border-radius: 999px;
}

.book-detail__order-label {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.book-detail__order-label i {
  color: var(--color-gold);
}

.book-detail__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, var(--font-size-2xl));
  line-height: var(--line-height-tight);
  margin: 0 0 0.35rem;
  color: var(--color-ink);
}

.book-detail__author {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: var(--font-size-base);
}

.book-detail__author strong {
  color: var(--color-ink);
  font-weight: 600;
}

.book-detail__meta {
  display: grid;
  gap: 0.625rem;
  margin: 0;
  padding-top: var(--space-sm);
  padding-bottom: var(--space-md);
}

.book-detail__meta-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: 0.625rem 0.875rem;
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}

.book-detail__meta-item dt {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-ink-muted);
  font-weight: 500;
  margin: 0;
}

.book-detail__meta-item dt i {
  color: var(--color-gold);
  width: 1rem;
  text-align: center;
}

.book-detail__meta-item dd {
  margin: 0;
  color: var(--color-ink);
  font-weight: 600;
  text-align: right;
}

.book-detail__price-wrap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  margin: 0;
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, rgba(232, 240, 235, 0.35) 0%, transparent 100%);
}

.book-detail__price-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.book-detail__price {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, var(--font-size-3xl));
  font-weight: 600;
  color: var(--color-primary);
  margin: 0;
  line-height: 1;
}

/* Order form */
.book-order-form {
  padding-top: var(--space-md);
  padding-bottom: clamp(1.25rem, 2.5vw, var(--space-lg));
}

.book-order-form__honeypot {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
  overflow: hidden;
}

.book-order-form__section {
  margin: 0 0 var(--space-md);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-cream);
}

.book-order-form__section-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0;
  margin: 0 0 var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  text-transform: none;
}

.book-order-form__section-title i {
  color: var(--color-primary);
  font-size: 0.9rem;
}

.book-order-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.book-order-form__row .form-group {
  margin-bottom: 0;
}

.book-order-form__label {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: 0.35rem;
}

.book-order-form__input {
  background: var(--color-white) !important;
  border-radius: var(--radius-sm);
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}

.book-order-form__input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-pale);
}

.book-order-form__error {
  margin: 0 0 var(--space-sm);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(180, 60, 60, 0.08);
  border: 1px solid rgba(180, 60, 60, 0.2);
  color: #9b2c2c;
  font-size: var(--font-size-sm);
}

.book-order-form__footer {
  display: grid;
  gap: var(--space-sm);
}

.book-order-form__submit {
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  font-size: var(--font-size-base);
  font-weight: 600;
  letter-spacing: 0.02em;
}

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

.book-detail__payment {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  margin: 0;
  padding: 0.875rem 1rem;
  background: var(--color-primary-pale);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-ink-soft);
  line-height: 1.5;
}

.book-detail__payment i {
  flex-shrink: 0;
  margin-top: 0.15rem;
  color: var(--color-primary);
}

/* Extras */
.book-extras {
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  border: 1px dashed rgba(var(--color-primary-rgb), 0.4);
  border-radius: var(--radius-md);
  background: rgba(232, 240, 235, 0.45);
}

.book-extras__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-ink);
}

.book-extras__title i {
  color: var(--color-primary);
}

.book-extras__list {
  display: grid;
  gap: 0.5rem;
  max-height: 14rem;
  overflow-y: auto;
  padding-right: 0.25rem;
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary-light) transparent;
}

.book-extras__list::-webkit-scrollbar {
  width: 5px;
}

.book-extras__list::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: 999px;
}

.book-extra {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  cursor: pointer;
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast), transform var(--duration-fast);
}

.book-extra:hover {
  border-color: var(--color-primary-light);
}

.book-extra:has(.book-extra__check:checked) {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary-pale);
  background: rgba(232, 240, 235, 0.35);
}

.book-extra__check {
  width: 1.125rem;
  height: 1.125rem;
  accent-color: var(--color-primary);
}

.book-extra__body {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.book-extra__cover {
  flex-shrink: 0;
  width: 2.5rem;
  height: 3.25rem;
  border-radius: 3px;
  overflow: hidden;
  background: var(--color-cream-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gold);
  font-size: var(--font-size-xs);
  box-shadow: 0 2px 8px rgba(26, 31, 46, 0.08);
}

.book-extra__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-extra__info {
  display: grid;
  gap: 0.125rem;
  min-width: 0;
}

.book-extra__name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.book-extra__price {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  font-weight: 600;
}

.book-extra__qty-input {
  width: 4.25rem;
  padding: 0.45rem 0.5rem;
  text-align: center;
  font-size: var(--font-size-sm);
}

/* Summary */
.book-summary {
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
  border-radius: var(--radius-md);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.book-summary__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-ink);
}

.book-summary__title::before {
  content: '';
  width: 3px;
  height: 1rem;
  background: var(--color-primary);
  border-radius: 2px;
}

.book-summary__rows {
  display: grid;
  gap: 0.45rem;
  margin: 0;
}

.book-summary__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
}

.book-summary__row dt {
  margin: 0;
  color: var(--color-ink-muted);
  font-weight: 400;
}

.book-summary__row dd {
  margin: 0;
  color: var(--color-ink);
  font-weight: 600;
}

.book-summary__total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-sm);
  padding: 0.875rem 1rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  font-size: var(--font-size-base);
}

.book-summary__total strong {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  color: var(--color-white);
  font-weight: 700;
}

/* Confirmation modal */
.book-modal[hidden] {
  display: none;
}

.book-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.book-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 31, 46, 0.55);
  backdrop-filter: blur(6px);
  animation: bookModalFadeIn var(--duration-normal) var(--ease-out);
}

.book-modal__panel {
  position: relative;
  width: min(100%, 28rem);
  max-height: 90vh;
  overflow-y: auto;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  animation: bookModalSlideUp var(--duration-normal) var(--ease-out);
}

@keyframes bookModalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes bookModalSlideUp {
  from { opacity: 0; transform: translateY(1rem) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.book-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-md) 0;
}

.book-modal__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: var(--font-size-lg);
  color: var(--color-ink);
}

.book-modal__title i {
  color: var(--color-primary);
}

.book-modal__close {
  width: 2.25rem;
  height: 2.25rem;
  border: none;
  background: transparent;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-ink-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast), color var(--duration-fast);
}

.book-modal__close:hover {
  background: var(--color-cream);
  color: var(--color-ink);
}

.book-modal__body {
  padding: var(--space-md);
  text-align: center;
}

.book-modal__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 50%;
  background: var(--color-primary-pale);
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.book-modal__lead {
  margin: 0 0 0.5rem;
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-ink);
}

.book-modal__text {
  margin: 0 0 var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-ink-muted);
  line-height: var(--line-height-body);
}

.book-modal__recap {
  margin: 0;
  padding: var(--space-md);
  background: var(--color-cream);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  text-align: left;
}

.book-modal__recap-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
}

.book-modal__recap-row + .book-modal__recap-row {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--color-border);
}

.book-modal__recap-row dt {
  margin: 0;
  color: var(--color-ink-muted);
  font-weight: 400;
}

.book-modal__recap-row dd {
  margin: 0;
  font-weight: 600;
  color: var(--color-ink);
}

.book-modal__recap-total {
  font-size: var(--font-size-lg) !important;
  color: var(--color-primary) !important;
}

.book-modal__footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: 0 var(--space-md) var(--space-md);
}

.book-modal__footer .btn {
  flex: 1 1 auto;
  min-width: 7rem;
}

body.book-modal-open {
  overflow: hidden;
}

/* Responsive */
@media (max-width: 960px) {
  .book-detail__gallery-card {
    position: static;
  }

  .book-detail__grid {
    grid-template-columns: 1fr;
  }

  .book-hero__title {
    font-size: clamp(1.5rem, 5vw, 2rem);
  }
}

@media (max-width: 640px) {
  .book-order-form__row {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }

  .book-order-form__section {
    padding: var(--space-sm);
  }

  .book-detail__meta-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .book-detail__meta-item dd {
    text-align: left;
  }

  .book-slider__btn {
    width: 2rem;
    height: 2rem;
  }

  .book-modal__footer {
    flex-direction: column;
  }

  .book-modal__footer .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .book-slide.is-active,
  .book-modal__backdrop,
  .book-modal__panel {
    animation: none;
  }
}