/* ================================================================
   EC2 — detail.css  商品詳細ページ
   ================================================================ */

/* ── Breadcrumb ──────────────────────────────────────────────── */
.breadcrumb {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px 40px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}
.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.breadcrumb a:hover { color: var(--text); }
.breadcrumb-sep { font-size: 0.6rem; }
.breadcrumb-current { color: var(--text-mid); }

/* ── Detail Layout ───────────────────────────────────────────── */
.detail-page {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 32px 40px 100px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}

/* ── Gallery ─────────────────────────────────────────────────── */
.detail-gallery {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}
.detail-gallery-main {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--surface);
  cursor: zoom-in;
}
.detail-gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.35s ease, transform 0.6s var(--ease);
}
.detail-gallery-main:hover img { transform: scale(1.04); }
.detail-gallery-main img.is-hidden {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
}
.detail-gallery-main img.is-active { opacity: 1; }

.gallery-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 5px 12px;
}

.detail-gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin-top: 4px;
}
.thumb-item {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--surface);
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.2s ease;
}
.thumb-item.is-active { border-color: var(--text); }
.thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s var(--ease);
}
.thumb-item:hover img { transform: scale(1.06); }

/* ── Info Panel ──────────────────────────────────────────────── */
.detail-info {
  padding-top: 8px;
}
.detail-category {
  font-size: 0.64rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 14px;
  display: block;
}
.detail-name {
  font-family: var(--ff-en);
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 6px;
}
.detail-name-ja {
  font-size: 0.82rem;
  font-weight: 300;
  color: var(--text-mid);
  margin-bottom: 20px;
  letter-spacing: 0.06em;
}
.detail-rating {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}
.stars {
  display: flex;
  gap: 2px;
}
.star {
  font-size: 0.75rem;
  color: var(--border-mid);
}
.star.filled { color: #B8860B; }
.rating-count {
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.detail-price-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.detail-price {
  font-family: var(--ff-sub);
  font-size: 1.6rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text);
}
.detail-price.is-sale { color: var(--sale); }
.detail-price-original {
  font-family: var(--ff-sub);
  font-size: 1rem;
  color: var(--text-muted);
  text-decoration: line-through;
}
.detail-tax {
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-left: 2px;
}

/* ── Color Selector ──────────────────────────────────────────── */
.selector-label {
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.selector-current {
  font-size: 0.72rem;
  font-weight: 300;
  text-transform: none;
  letter-spacing: 0.06em;
  color: var(--text);
}
.color-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.color-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}
.color-swatch {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid transparent;
  outline: 2px solid transparent;
  outline-offset: 3px;
  transition: outline-color 0.2s ease, border-color 0.2s ease;
  position: relative;
}
.color-option.is-active .color-swatch {
  outline-color: var(--text);
}
.color-option-name {
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.color-option.is-active .color-option-name { color: var(--text); }

/* ── Size Selector ───────────────────────────────────────────── */
.size-options {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.size-btn {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff-sub);
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  color: var(--text-mid);
  border: 1px solid var(--border);
  background: var(--white);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}
.size-btn:hover { border-color: var(--text); color: var(--text); }
.size-btn.is-active {
  background: var(--text);
  color: var(--white);
  border-color: var(--text);
}
.size-btn.is-soldout {
  color: var(--border);
  border-color: var(--border);
  cursor: not-allowed;
  text-decoration: line-through;
}
.size-guide-link {
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-mid);
  padding-bottom: 2px;
  margin-bottom: 28px;
  display: inline-block;
  transition: color 0.2s ease;
}
.size-guide-link:hover { color: var(--text); }

/* ── Quantity ────────────────────────────────────────────────── */
.qty-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.qty-label {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mid);
}
.qty-ctrl {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
}
.qty-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-mid);
  transition: color 0.2s ease;
}
.qty-btn:hover { color: var(--text); }
.qty-num {
  width: 44px;
  text-align: center;
  font-family: var(--ff-sub);
  font-size: 1rem;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-family: var(--ff-ui);
}

/* ── Action Buttons ──────────────────────────────────────────── */
.action-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.btn-cart {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 16px 24px;
  background: var(--text);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  border: 2px solid var(--text);
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease;
}
.btn-cart:hover { background: #333; border-color: #333; }
.btn-cart svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.5; }

.btn-buy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 16px 24px;
  background: transparent;
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  border: 2px solid var(--text);
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease;
}
.btn-buy:hover { background: var(--text); color: var(--white); }

.btn-fav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 24px;
  background: transparent;
  color: var(--text-mid);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: color 0.25s ease, border-color 0.25s ease;
}
.btn-fav:hover { color: var(--text); border-color: var(--text-mid); }
.btn-fav svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 1.5; }
.btn-fav.is-active svg { fill: currentColor; color: var(--sale); }

/* ── Trust Badges ────────────────────────────────────────────── */
.trust-badges {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.68rem;
  color: var(--text-mid);
  letter-spacing: 0.06em;
}
.trust-item svg { width: 16px; height: 16px; stroke: var(--text-mid); fill: none; stroke-width: 1.4; flex-shrink: 0; }

/* ── Accordion ───────────────────────────────────────────────── */
.accordion-item {
  border-bottom: 1px solid var(--border);
}
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  background: none;
  border: none;
}
.accordion-icon {
  font-size: 1rem;
  color: var(--text-mid);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.accordion-item.is-open .accordion-icon { transform: rotate(45deg); }
.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.accordion-body-inner {
  padding: 0 0 20px;
  font-size: 0.84rem;
  font-weight: 300;
  line-height: 2;
  color: var(--text-mid);
}
.accordion-body-inner ul {
  list-style: disc;
  padding-left: 1.2em;
}
.accordion-body-inner li { margin-bottom: 4px; }

/* ── Reviews Section ─────────────────────────────────────────── */
.reviews-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 40px;
}
.reviews-heading {
  font-family: var(--ff-en);
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 40px;
}

/* Summary */
.reviews-summary {
  display: flex;
  gap: 48px;
  align-items: flex-start;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}
.reviews-summary-score {
  text-align: center;
  flex-shrink: 0;
}
.reviews-avg {
  font-family: var(--ff-sub);
  font-size: 2.8rem;
  font-weight: 300;
  line-height: 1;
  margin-bottom: 8px;
}
.reviews-stars { justify-content: center; margin-bottom: 6px; }
.reviews-count { font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.06em; }
.reviews-bars { flex: 1; display: flex; flex-direction: column; gap: 7px; justify-content: center; }
.review-bar-row { display: flex; align-items: center; gap: 10px; }
.review-bar-label { font-size: 0.68rem; color: var(--text-mid); width: 20px; text-align: right; flex-shrink: 0; }
.review-bar-track { flex: 1; height: 4px; background: var(--border); }
.review-bar-fill  { height: 100%; background: #B8860B; transition: width 0.5s ease; }
.review-bar-num   { font-size: 0.68rem; color: var(--text-muted); width: 16px; flex-shrink: 0; }

/* Controls */
.reviews-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.review-filters { display: flex; gap: 6px; flex-wrap: wrap; }
.review-filter-btn {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  border: 1px solid var(--border);
  background: none;
  color: var(--text-mid);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.review-filter-btn:hover { border-color: var(--text-mid); }
.review-filter-btn.is-active { background: var(--text); color: var(--white); border-color: var(--text); }
.review-sort-select {
  font-size: 0.72rem;
  color: var(--text-mid);
  border: 1px solid var(--border);
  padding: 6px 10px;
  background: none;
  cursor: pointer;
}

/* Star */
.star.half { color: #B8860B; opacity: 0.5; }
.rating-count { text-decoration: none; color: var(--text-muted); }
.rating-count:hover { color: var(--text); }

/* Review Card */
.review-card {
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}
.review-card:first-child { border-top: 1px solid var(--border); }
.review-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.review-card-stars { display: flex; gap: 2px; }
.review-badge {
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  border: 1px solid var(--text-muted);
  color: var(--text-muted);
  padding: 2px 8px;
}
.review-card-date { font-size: 0.68rem; color: var(--text-muted); margin-left: auto; }
.review-card-title {
  font-size: 0.84rem;
  font-weight: 500;
  margin-bottom: 6px;
}
.review-card-body {
  font-size: 0.82rem;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 12px;
}
.review-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.review-card-author { font-size: 0.72rem; color: var(--text-muted); }
.review-helpful-btn {
  background: none;
  border: none;
  font-size: 0.7rem;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.15s;
}
.review-helpful-btn:hover { color: var(--text); }
.review-empty {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  padding: 40px 0;
}

/* More Button */
.review-more-wrap { text-align: center; padding: 28px 0; }
.review-more-btn {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--text);
  background: none;
  color: var(--text);
  padding: 13px 36px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.review-more-btn:hover { background: var(--text); color: var(--white); }

/* Write Review */
.review-write {
  margin-top: 56px;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}
.review-write-heading {
  font-family: var(--ff-en);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.review-form-field { margin-bottom: 20px; }
.review-form-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin-bottom: 8px;
}
.review-form-required { color: #c0392b; }
.review-star-input { display: flex; gap: 4px; }
.review-star-opt {
  font-size: 1.4rem;
  color: var(--border-mid, #ccc);
  cursor: pointer;
  transition: color 0.1s;
}
.review-star-opt.is-active { color: #B8860B; }
.review-form-input,
.review-form-textarea {
  width: 100%;
  border: 1px solid var(--border);
  padding: 10px 14px;
  font-size: 0.82rem;
  color: var(--text);
  background: var(--white);
  resize: vertical;
  transition: border-color 0.2s;
}
.review-form-input:focus,
.review-form-textarea:focus { outline: none; border-color: var(--text-mid); }
.review-char-count { font-size: 0.68rem; color: var(--text-muted); text-align: right; margin-top: 4px; }
.review-form-error { font-size: 0.72rem; color: #c0392b; margin-top: 4px; }
.review-submit-btn {
  background: var(--text);
  color: var(--white);
  border: none;
  padding: 14px 36px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s;
}
.review-submit-btn:hover { background: #333; }
.review-success {
  margin-top: 12px;
  font-size: 0.8rem;
  color: #3a7a3a;
}

/* Modal */
.review-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .5);
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.review-modal-overlay[hidden] { display: none; }
.review-modal-content {
  background: var(--white);
  width: min(640px, 100%);
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}
.review-modal-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.review-modal-title {
  font-family: var(--ff-en);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  flex: 1;
}
.review-modal-close {
  background: none;
  border: none;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px 6px;
}
.review-modal-close:hover { color: var(--text); }
.review-modal-body {
  overflow-y: auto;
  padding: 0 24px;
  flex: 1;
}

/* Responsive */
@media (max-width: 640px) {
  .reviews-section { padding: 56px 24px; }
  .reviews-summary { flex-direction: column; gap: 24px; }
  .review-form-input,
  .review-form-textarea { font-size: 16px; }
}

/* ── Related Products ────────────────────────────────────────── */
.detail-related {
  background: var(--off-white);
  padding: 88px 40px;
}
.detail-related-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 960px) {
  .detail-page {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 24px 24px 80px;
  }
  .detail-gallery { position: static; }
  .breadcrumb { padding: 16px 24px 0; }
}

@media (max-width: 480px) {
  .detail-gallery-thumbs { grid-template-columns: repeat(4, 1fr); }
  .size-btn { width: 46px; height: 46px; }
  .detail-related { padding: 64px 20px; }
}