/* ===========================
   product-detail.html — page-specific styles
   =========================== */

.detail-page {
  padding-top: 100px;
  padding-bottom: 80px;
}

/* ── Product Grid ── */
.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-bottom: 72px;
}

/* ── Images ── */
.detail-images {
  position: sticky;
  top: 88px;
  height: fit-content;
}

.detail-main-img {
  position: relative;
  aspect-ratio: 4/5;
  overflow: hidden;
  background: var(--gray-100);
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.detail-main-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.detail-main-img:hover img {
  transform: scale(1.03);
}

.detail-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--dark-blue);
  color: var(--white);
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 2px;
}

.detail-thumbs {
  display: flex;
  gap: 10px;
}

.thumb {
  width: 80px;
  height: 80px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color var(--transition);
  background: none;
  padding: 0;
}

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

.thumb.active {
  border-color: var(--black);
}

.thumb:hover {
  border-color: var(--gray-300);
}

.thumb.active:hover {
  border-color: var(--black);
}

/* ── Info ── */
.detail-info {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.detail-origin-badge {
  font-family: var(--font-en);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mid-blue);
  margin-bottom: 10px;
}

.detail-title {
  font-family: var(--font-jp);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--black);
  margin-bottom: 6px;
}

.detail-roast {
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--gray-500);
  text-transform: uppercase;
  margin-bottom: 20px;
}

/* Flavor notes */
.flavor-notes {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.flavor-tag {
  font-family: var(--font-jp);
  font-size: 0.78rem;
  padding: 5px 12px;
  background: var(--light-blue);
  color: var(--dark-blue);
  border-radius: 20px;
  letter-spacing: 0.03em;
}

/* Price */
.detail-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--gray-100);
}

.detail-price {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 700;
  color: var(--black);
  line-height: 1;
}

.detail-unit {
  font-family: var(--font-jp);
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* Description */
.detail-description {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--gray-100);
}

.detail-description p {
  font-family: var(--font-jp);
  font-size: 0.9rem;
  color: var(--gray-700);
  line-height: 1.85;
  margin-bottom: 12px;
}

.detail-description p:last-child {
  margin-bottom: 0;
}

/* Specs */
.detail-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 24px;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--gray-100);
}

.detail-specs > div {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.detail-specs dt {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.detail-specs dd {
  font-family: var(--font-jp);
  font-size: 0.88rem;
  color: var(--black);
  font-weight: 500;
}

/* Options */
.detail-option {
  margin-bottom: 20px;
}

.option-label {
  display: block;
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-500);
  margin-bottom: 10px;
}

.size-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.size-radio {
  display: flex;
  align-items: center;
  cursor: pointer;
}

.size-radio input[type="radio"] {
  display: none;
}

.size-radio span {
  padding: 9px 16px;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius);
  font-family: var(--font-jp);
  font-size: 0.82rem;
  color: var(--gray-700);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.size-radio input[type="radio"]:checked + span {
  border-color: var(--black);
  background: var(--black);
  color: var(--white);
}

.size-radio span:hover {
  border-color: var(--gray-700);
}

.grind-select {
  width: 100%;
  font-family: var(--font-jp);
  font-size: 0.88rem;
  padding: 11px 14px;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--gray-700);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%237a8a96' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.grind-select:focus {
  outline: 1.5px solid var(--black);
  border-color: var(--black);
}

/* Cart row */
.detail-cart-row {
  display: flex;
  gap: 12px;
  margin: 24px 0 16px;
  align-items: stretch;
}

.qty-wrap {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius);
  overflow: hidden;
  flex-shrink: 0;
}

.qty-minus, .qty-plus {
  width: 42px;
  height: 50px;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--gray-700);
  transition: background var(--transition), color var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.qty-minus:hover, .qty-plus:hover {
  background: var(--gray-100);
  color: var(--black);
}

.qty-input {
  width: 50px;
  height: 50px;
  text-align: center;
  border: none;
  border-left: 1px solid var(--gray-300);
  border-right: 1px solid var(--gray-300);
  font-family: var(--font-en);
  font-size: 1rem;
  color: var(--black);
  -moz-appearance: textfield;
}

.qty-input::-webkit-inner-spin-button,
.qty-input::-webkit-outer-spin-button {
  appearance: none;
}

.qty-input:focus {
  outline: none;
}

.add-to-cart-btn {
  flex: 1;
  justify-content: center;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  height: 50px;
  transition: all var(--transition);
}

/* Sub actions */
.detail-sub-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.sub-action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  font-family: var(--font-jp);
  font-size: 0.82rem;
  color: var(--gray-500);
  cursor: pointer;
  transition: color var(--transition);
  padding: 0;
}

.sub-action-btn:hover {
  color: var(--black);
}

/* Delivery note */
.delivery-note {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--light-blue);
  border-radius: var(--radius);
  font-family: var(--font-jp);
  font-size: 0.78rem;
  color: var(--dark-blue);
}

/* ── Tabs ── */
.product-tabs {
  margin-bottom: 0;
}

.tabs-nav {
  display: flex;
  border-bottom: 1px solid var(--gray-100);
  margin-bottom: 40px;
  gap: 0;
}

.tab-btn {
  background: none;
  border: none;
  padding: 14px 28px;
  font-family: var(--font-en);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-500);
  cursor: pointer;
  position: relative;
  transition: color var(--transition);
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--black);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.tab-btn.active {
  color: var(--black);
}

.tab-btn.active::after {
  transform: scaleX(1);
}

.tab-btn:hover {
  color: var(--gray-700);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.tab-inner {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 48px;
  align-items: center;
}

.tab-text h3 {
  font-size: 1.4rem;
  margin-bottom: 16px;
  color: var(--black);
}

.tab-text p {
  font-family: var(--font-jp);
  font-size: 0.9rem;
  color: var(--gray-700);
  line-height: 1.85;
  margin-bottom: 14px;
}

.tab-img {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
}

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

/* Brew Guide */
.brew-guide {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.brew-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.brew-num {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 700;
  color: var(--light-blue);
  line-height: 1;
  flex-shrink: 0;
  width: 52px;
}

.brew-step h4 {
  font-family: var(--font-jp);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--black);
  margin-bottom: 6px;
}

.brew-step p {
  font-family: var(--font-jp);
  font-size: 0.85rem;
  color: var(--gray-700);
  line-height: 1.7;
}

/* ── Related Products ── */
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* Reuse product-card styles from products.css */
.related-section .product-card {
  display: block;
  position: relative;
  text-decoration: none;
  color: inherit;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.related-section .product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.related-section .product-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/4;
  background: var(--gray-100);
}

.related-section .product-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.related-section .product-card:hover .product-img-wrap img {
  transform: scale(1.05);
}

.related-section .product-info {
  padding: 14px 4px 4px;
}

.related-section .product-origin {
  font-family: var(--font-en);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid-blue);
  display: block;
  margin-bottom: 5px;
}

.related-section .product-name {
  font-family: var(--font-jp);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--black);
  margin-bottom: 5px;
}

.related-section .product-note {
  font-size: 0.78rem;
  color: var(--gray-500);
  margin-bottom: 8px;
}

.related-section .product-price {
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 600;
  color: var(--black);
}

.related-section .product-price span {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--gray-500);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .product-detail-grid {
    gap: 40px;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .tab-inner {
    grid-template-columns: 1fr;
  }

  .tab-img {
    display: none;
  }
}

@media (max-width: 768px) {
  .product-detail-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .detail-images {
    position: static;
  }

  .detail-specs {
    grid-template-columns: repeat(2, 1fr);
  }

  .brew-guide {
    grid-template-columns: 1fr;
  }

  .tabs-nav {
    overflow-x: auto;
    gap: 0;
    scrollbar-width: none;
  }

  .tab-btn {
    padding: 12px 20px;
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  .related-grid {
    grid-template-columns: 1fr;
  }

  .detail-cart-row {
    flex-direction: column;
  }

  .qty-wrap {
    align-self: flex-start;
  }

  .size-options {
    flex-direction: column;
  }
}