/* ============================================================================
 * Nana product page — V8.35+ premium editorial commerce surface.
 * ========================================================================== */

.nana-product-page {
  background: var(--nana-cream);
  color: var(--nana-ink);
  padding: var(--nana-space-6) 0 var(--nana-space-9);
  font-family: var(--nana-font-sans);
}

.nana-product-page__hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--nana-space-7);
  align-items: start;
}

.nana-product-page__gallery {
  display: grid;
  gap: var(--nana-space-3);
  min-width: 0;
}

.nana-product-page__hero-image {
  overflow: hidden;
  border-radius: var(--nana-radius-xl);
  background: var(--nana-fog);
}

.nana-product-page__hero-image img,
.nana-product-page__image-placeholder {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.nana-product-page__image-placeholder {
  background: var(--nana-fog);
}

.nana-product-page__thumbnails {
  display: flex;
  gap: var(--nana-space-2);
  overflow-x: auto;
  margin: 0;
  padding: 0 0 var(--nana-space-2);
  list-style: none;
  scroll-snap-type: x proximity;
}

.nana-product-page__thumbnail {
  flex: 0 0 84px; /* nana-token-exception: gallery thumbnail measure */
  scroll-snap-align: start;
}

.nana-product-page__thumbnail button {
  display: block;
  width: 100%;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--nana-line);
  border-radius: var(--nana-radius-md);
  background: transparent;
  cursor: pointer;
}

.nana-product-page__thumbnail button[aria-current="true"] {
  border-color: var(--nana-ink);
  outline: 2px solid var(--nana-ink); /* nana-token-exception: selected thumbnail */
  outline-offset: 2px; /* nana-token-exception: selected thumbnail */
}

.nana-product-page__thumbnail img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.nana-product-page__summary {
  display: grid;
  gap: var(--nana-space-4);
  min-width: 0;
}

.nana-product-page__eyebrow,
.nana-product-page__section-eyebrow,
.nana-product-page__fit-eyebrow {
  margin: 0;
  color: var(--nana-coral);
  font-size: var(--nana-fs-xs);
  font-weight: var(--nana-fw-semibold);
  letter-spacing: var(--nana-tr-wider);
  text-transform: uppercase;
}

.nana-product-page__title {
  max-width: 18ch;
  margin: 0;
  font-family: var(--nana-font-serif);
  font-size: clamp(var(--nana-fs-3xl), 6vw, var(--nana-fs-5xl));
  line-height: var(--nana-lh-tight);
  letter-spacing: var(--nana-tr-tight);
}

.nana-product-page__rating {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: var(--nana-space-2);
  color: var(--nana-coral);
  font-size: var(--nana-fs-sm);
  text-decoration: none;
}

.nana-product-page__price {
  margin: 0;
  font-family: var(--nana-font-serif);
  font-size: var(--nana-fs-2xl);
}

.nana-product-page__short-desc {
  max-width: 56ch;
  color: var(--nana-mute);
  line-height: var(--nana-lh-relaxed);
}

.nana-product-page__short-desc > :first-child { margin-top: 0; }
.nana-product-page__short-desc > :last-child { margin-bottom: 0; }

.nana-product-page__stock-low {
  margin: 0;
  padding: var(--nana-space-3) var(--nana-space-4);
  border-radius: var(--nana-radius-md);
  background: var(--nana-fog);
  color: var(--nana-coral);
  font-weight: var(--nana-fw-semibold);
}

.nana-product-page__cart-form {
  display: grid;
  gap: var(--nana-space-4);
  padding-top: var(--nana-space-2);
}

.nana-product-page__variations {
  display: grid;
  gap: var(--nana-space-4);
}

.nana-product-page__variation {
  display: grid;
  gap: var(--nana-space-2);
}

.nana-product-page__variation > label {
  font-size: var(--nana-fs-sm);
  font-weight: var(--nana-fw-semibold);
}

.nana-product-page__variation select {
  width: 100%;
  min-height: 48px; /* nana-token-exception: commerce control */
  border: 1px solid var(--nana-line);
  border-radius: var(--nana-radius-md);
  padding: var(--nana-space-2) var(--nana-space-4);
  background: var(--nana-paper);
  color: var(--nana-ink);
  font-family: var(--nana-font-sans);
}

.nana-product-page__variation-reset {
  justify-self: start;
  color: var(--nana-mute);
  font-size: var(--nana-fs-xs);
}

.nana-product-page__purchase-row {
  display: grid;
  grid-template-columns: minmax(84px, auto) minmax(0, 1fr); /* nana-token-exception: quantity rail */
  gap: var(--nana-space-3);
  align-items: stretch;
}

.nana-product-page__qty,
.nana-product-page__qty .quantity {
  height: 100%;
}

.nana-product-page__qty input.qty {
  width: 84px; /* nana-token-exception: quantity field */
  min-height: 52px; /* nana-token-exception: primary commerce target */
  border: 1px solid var(--nana-line);
  border-radius: var(--nana-radius-pill);
  background: var(--nana-paper);
  color: var(--nana-ink);
  font-family: var(--nana-font-sans);
  font-weight: var(--nana-fw-semibold);
  text-align: center;
}

.nana-product-page__add-to-cart {
  width: 100%;
  min-height: 52px; /* nana-token-exception: primary commerce target */
  border: 0;
  border-radius: var(--nana-radius-pill);
  padding: var(--nana-space-3) var(--nana-space-5);
  background: var(--nana-coral);
  color: var(--nana-paper);
  font-family: var(--nana-font-sans);
  font-size: var(--nana-fs-md);
  font-weight: var(--nana-fw-semibold);
  cursor: pointer;
}

.nana-product-page__add-to-cart:hover:not(:disabled),
.nana-product-page__add-to-cart:focus-visible:not(:disabled) {
  background: var(--nana-ink);
  color: var(--nana-cream);
}

.nana-product-page__add-to-cart:disabled,
.nana-product-page__add-to-cart.disabled {
  background: var(--nana-line);
  color: var(--nana-mute);
  cursor: not-allowed;
}

.nana-product-page__secondary-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--nana-space-2);
}

.nana-product-page__wishlist-toggle {
  min-height: 44px; /* nana-token-exception: WCAG target */
  border: 1px solid var(--nana-line);
  border-radius: var(--nana-radius-pill);
  padding: var(--nana-space-2) var(--nana-space-4);
  background: transparent;
  color: var(--nana-ink);
  font-family: var(--nana-font-sans);
  font-weight: var(--nana-fw-semibold);
  cursor: pointer;
}

.nana-product-page__wishlist-toggle[aria-pressed="true"] {
  border-color: var(--nana-coral);
  background: var(--nana-coral);
  color: var(--nana-paper);
}

.nana-product-page__fit,
.nana-product-page__stock-alert {
  display: grid;
  gap: var(--nana-space-4);
  padding: var(--nana-space-5);
  border-radius: var(--nana-radius-xl);
}

.nana-product-page__fit {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  background: var(--nana-ink);
  color: var(--nana-cream);
}

.nana-product-page__fit h2,
.nana-product-page__stock-alert h2 {
  margin: var(--nana-space-1) 0 var(--nana-space-2);
  font-family: var(--nana-font-serif);
  font-size: var(--nana-fs-xl);
}

.nana-product-page__fit p,
.nana-product-page__stock-alert p {
  margin-top: 0;
  line-height: var(--nana-lh-relaxed);
}

.nana-product-page__fit-cta,
.nana-product-page__stock-alert-form button {
  min-height: 44px; /* nana-token-exception: WCAG target */
  border: 0;
  border-radius: var(--nana-radius-pill);
  padding: var(--nana-space-2) var(--nana-space-4);
  background: var(--nana-cream);
  color: var(--nana-ink);
  font-family: var(--nana-font-sans);
  font-weight: var(--nana-fw-semibold);
  cursor: pointer;
}

.nana-product-page__stock-alert {
  border: 1px solid var(--nana-line);
  background: var(--nana-paper);
}

.nana-product-page__stock-alert-form {
  display: grid;
  gap: var(--nana-space-2);
}

.nana-product-page__stock-alert-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--nana-space-2);
}

.nana-product-page__stock-alert-form input {
  width: 100%;
  min-height: 44px; /* nana-token-exception: WCAG target */
  border: 1px solid var(--nana-line);
  border-radius: var(--nana-radius-pill);
  padding: var(--nana-space-2) var(--nana-space-4);
  background: var(--nana-cream);
  color: var(--nana-ink);
  font-family: var(--nana-font-sans);
}

.nana-product-page__stock-alert-form button {
  background: var(--nana-ink);
  color: var(--nana-cream);
}

.nana-product-page__stock-status {
  min-height: 1.5em;
  margin: 0;
  font-size: var(--nana-fs-sm);
}

.nana-product-page__stock-status[data-state="error"] { color: var(--nana-coral); }
.nana-product-page__stock-status[data-state="success"] { color: var(--nana-ink); }

.nana-product-page__trust {
  display: grid;
  gap: var(--nana-space-2);
  margin: 0;
  padding: var(--nana-space-4) 0 0;
  border-top: 1px solid var(--nana-line);
  list-style: none;
}

.nana-product-page__trust li {
  display: grid;
  grid-template-columns: minmax(120px, auto) minmax(0, 1fr); /* nana-token-exception: trust label */
  gap: var(--nana-space-3);
  font-size: var(--nana-fs-sm);
}

.nana-product-page__trust span { color: var(--nana-mute); }

.nana-product-page__details {
  display: grid;
  gap: var(--nana-space-8);
  margin-top: var(--nana-space-9);
}

.nana-product-page__details-grid {
  display: grid;
  gap: var(--nana-space-6);
}

.nana-product-page__description,
.nana-product-page__specifications,
.nana-product-page__reviews {
  padding: var(--nana-space-6);
  border-radius: var(--nana-radius-xl);
  background: var(--nana-paper);
}

.nana-product-page__details h2,
.nana-product-page__reviews h2,
.nana-product-page__related h2 {
  margin: var(--nana-space-2) 0 var(--nana-space-4);
  font-family: var(--nana-font-serif);
  font-size: var(--nana-fs-2xl);
  line-height: var(--nana-lh-tight);
}

.nana-product-page__description {
  color: var(--nana-mute);
  line-height: var(--nana-lh-relaxed);
}

.nana-product-page__specifications dl {
  display: grid;
  gap: 0;
  margin: 0;
}

.nana-product-page__specifications dl > div {
  display: grid;
  grid-template-columns: minmax(120px, 0.6fr) minmax(0, 1fr); /* nana-token-exception: specification label */
  gap: var(--nana-space-4);
  padding: var(--nana-space-3) 0;
  border-bottom: 1px solid var(--nana-line);
}

.nana-product-page__specifications dt { font-weight: var(--nana-fw-semibold); }
.nana-product-page__specifications dd { margin: 0; color: var(--nana-mute); }

.nana-product-page__reviews-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); /* nana-token-exception: review card minimum */
  gap: var(--nana-space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nana-product-page__review {
  display: grid;
  gap: var(--nana-space-3);
  padding: var(--nana-space-4);
  border: 1px solid var(--nana-line);
  border-radius: var(--nana-radius-lg);
  background: var(--nana-cream);
}

.nana-product-page__review-rating { color: var(--nana-coral); }
.nana-product-page__review blockquote { margin: 0; line-height: var(--nana-lh-relaxed); }
.nana-product-page__review p { display: flex; justify-content: space-between; gap: var(--nana-space-3); margin: 0; color: var(--nana-mute); font-size: var(--nana-fs-xs); }

.nana-product-page__reviews-empty { color: var(--nana-mute); }

.nana-product-page__related {
  margin-top: var(--nana-space-9);
}

.nana-product-page__missing {
  display: grid;
  justify-items: start;
  gap: var(--nana-space-3);
  padding-block: var(--nana-space-9);
}

.nana-product-page__missing h1 {
  margin: 0;
  font-family: var(--nana-font-serif);
  font-size: var(--nana-fs-3xl);
}

.nana-product-page__mobile-purchase {
  display: none;
}

.nana-product-page button:focus-visible,
.nana-product-page select:focus-visible,
.nana-product-page input:focus-visible,
.nana-product-page a:focus-visible {
  outline: 3px solid var(--nana-coral); /* nana-token-exception: focus visibility */
  outline-offset: 3px; /* nana-token-exception: focus visibility */
}

@media (min-width: 768px) { /* nana-token-exception: structural breakpoint */
  .nana-product-page__details-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) { /* nana-token-exception: structural breakpoint */
  .nana-product-page__hero {
    grid-template-columns: minmax(0, 1.2fr) minmax(360px, 0.8fr); /* nana-token-exception: PDP ratio */
  }

  .nana-product-page__gallery {
    grid-template-columns: 92px minmax(0, 1fr); /* nana-token-exception: vertical thumbnail rail */
    align-items: start;
  }

  .nana-product-page__hero-image {
    grid-column: 2;
    grid-row: 1;
  }

  .nana-product-page__thumbnails {
    grid-column: 1;
    grid-row: 1;
    display: grid;
    overflow: visible;
    padding: 0;
  }

  .nana-product-page__thumbnail {
    width: 92px; /* nana-token-exception: vertical thumbnail rail */
  }

  .nana-product-page__summary {
    position: sticky;
    top: var(--nana-space-6);
  }
}

@media (max-width: 767px) { /* nana-token-exception: structural breakpoint */
  .nana-product-page {
    padding-bottom: calc(var(--nana-space-9) + 92px + env(safe-area-inset-bottom)); /* nana-token-exception: sticky purchase bar */
  }

  .nana-product-page__fit {
    grid-template-columns: 1fr;
  }

  .nana-product-page__purchase-row,
  .nana-product-page__stock-alert-controls {
    grid-template-columns: 1fr;
  }

  .nana-product-page__qty input.qty {
    width: 100%;
  }

  .nana-product-page__trust li,
  .nana-product-page__specifications dl > div {
    grid-template-columns: 1fr;
    gap: var(--nana-space-1);
  }

  .nana-product-page__mobile-purchase {
    position: fixed;
    z-index: var(--nana-z-modal);
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--nana-space-3);
    align-items: center;
    padding: var(--nana-space-3) var(--nana-space-4) calc(var(--nana-space-3) + env(safe-area-inset-bottom));
    border-top: 1px solid var(--nana-line);
    background: var(--nana-paper);
  }

  .nana-product-page__mobile-purchase > div {
    display: grid;
    min-width: 0;
  }

  .nana-product-page__mobile-purchase span {
    overflow: hidden;
    color: var(--nana-mute);
    font-size: var(--nana-fs-xs);
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .nana-product-page__mobile-purchase button {
    min-height: 48px; /* nana-token-exception: sticky CTA */
    border: 0;
    border-radius: var(--nana-radius-pill);
    padding: var(--nana-space-2) var(--nana-space-4);
    background: var(--nana-coral);
    color: var(--nana-paper);
    font-weight: var(--nana-fw-semibold);
  }
}

@media (prefers-reduced-motion: reduce) {
  .nana-product-page *,
  .nana-product-page *::before,
  .nana-product-page *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}