/* =============================================
   shop.css — 商城页面模块样式
   依赖 common.css 中的 CSS 变量
   依赖 home.css 中的 header / footer 样式
   ============================================= */

/* =============================================
   PAGE LAYOUT
   ============================================= */
.page-shop {
  background-color: #f5f5f5;
  min-height: 100vh;
}

/* 面包屑容器 */
.shop-breadcrumb {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 12px 60px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  list-style: none;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-muted);
}

.breadcrumb-list li a {
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

.breadcrumb-list li a:hover {
  color: var(--color-primary);
}

.breadcrumb-list li.active {
  color: var(--color-primary);
  font-weight: 500;
}

.breadcrumb-list .sep {
  color: #ccc;
  font-size: 12px;
}

/* 主内容区 */
.shop-main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 60px 48px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

/* =============================================
   SIDEBAR
   ============================================= */
.shop-sidebar {
  width: 320px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* 通用卡片 */
.sidebar-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

/* ---- Categories 分类卡片 ---- */
.sidebar-card--categories {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-card__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-dark);
  line-height: 1.5;
}

.category-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.category-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-base);
  text-decoration: none;
}

.category-item:hover,
.category-item.is-active {
  background: #fff5f5;
}

.category-item.is-active .category-item__name {
  color: var(--color-primary);
  font-weight: 500;
}

.category-item__left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.category-item__name {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-body);
  transition: color var(--transition-base);
}

.category-item__count {
  font-size: 12px;
  color: var(--color-text-hint);
}

.category-item__arrow {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.4;
}

.category-item:hover .category-item__arrow,
.category-item.is-active .category-item__arrow {
  opacity: 1;
}

/* ---- Filters 筛选卡片 ---- */
.sidebar-card--filters {
  display: flex;
  flex-direction: column;
}

.filters-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px;
  border-bottom: 1px solid var(--color-border);
}

.filters-header__title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.filters-header__label {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-dark);
}

.filters-header__count {
  font-size: 12px;
  color: var(--color-text-hint);
}

.filters-header__icon {
  width: 16px;
  height: 16px;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.filters-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* -- Filter 子分组 -- */
.filter-group {
  border-bottom: 1px solid #f0f0f0;
  padding-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.filter-group:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.filter-group__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.filter-group__name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-dark);
  line-height: 1.5;
}

.filter-group__toggle {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.filter-group.is-collapsed .filter-group__toggle {
  transform: rotate(180deg);
}

.filter-group.is-collapsed .filter-group__body {
  display: none;
}

/* -- 复选框列表（Brand） -- */
.filter-checkbox-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-base);
}

.filter-label:hover {
  background: #f5f5f5;
}

.filter-label.is-selected {
  background: #fff5f5;
}

.filter-label input[type="checkbox"],
.filter-label input[type="radio"] {
  width: 14px;
  height: 14px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
  cursor: pointer;
}

.filter-brand-logo {
  width: 20px;
  height: 20px;
  border: 1px solid #eee;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.filter-brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.filter-label__text-row {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.filter-label__name {
  font-size: 12px;
  color: var(--color-text-body);
}

.filter-label__count {
  font-size: 11px;
  color: var(--color-text-hint);
}

/* Show More 链接 */
.filter-show-more {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  padding: 4px;
  transition: opacity var(--transition-base);
  display: inline-flex;
  align-items: center;
}

.filter-show-more:hover {
  opacity: 0.75;
}

/* -- 标签按钮组 (Years, Engine, Series...) -- */
.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filter-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  background: #f5f5f5;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 500;
  color: #666;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base);
  user-select: none;
}

.filter-tag:hover {
  background: #ffe8e8;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.filter-tag.is-active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* -- 单选按钮 (Stock Status) -- */
.filter-radio-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.filter-radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-base);
}

.filter-radio-label:hover {
  background: #f5f5f5;
}

.filter-radio-label.is-selected {
  background: #fff5f5;
}

.filter-radio-label input[type="radio"] {
  width: 14px;
  height: 14px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
  cursor: pointer;
}

.filter-radio-label__text {
  font-size: 12px;
  color: var(--color-text-body);
}

/* Reset All Filters 按钮 */
.filter-reset-btn {
  width: 100%;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition-base),
              color var(--transition-base),
              border-color var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 4px;
}

.filter-reset-btn:hover {
  background: #f5f5f5;
  color: var(--color-text-dark);
  border-color: #ccc;
}

/* =============================================
   MAIN CONTENT AREA
   ============================================= */
.shop-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ---- Active Filters Bar ---- */
.active-filters-bar {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 15px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 58px;
}

.active-filters-bar.is-empty {
  display: none;
}

.active-filters__label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
  margin-right: 4px;
}

.active-filters__tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
}

.active-filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  background: #fff5f5;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  transition: background var(--transition-base);
}

.active-filter-tag:hover {
  background: #ffe0e0;
}

.active-filter-tag__remove {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  opacity: 0.7;
}

.active-filter-tag:hover .active-filter-tag__remove {
  opacity: 1;
}

.active-filters__clear {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  white-space: nowrap;
  margin-left: auto;
  padding: 4px;
  transition: opacity var(--transition-base);
}

.active-filters__clear:hover {
  opacity: 0.75;
  text-decoration: underline;
}

/* ---- Sort Bar ---- */
.sort-bar {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 15px;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 54px;
}

.sort-item {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color var(--transition-base);
  padding: 2px 0;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.sort-item:hover {
  color: var(--color-primary);
}

.sort-item.is-active {
  color: var(--color-primary);
  font-weight: 700;
}

.sort-sep {
  color: var(--color-border);
  font-size: 16px;
  line-height: 1;
  flex-shrink: 0;
}

/* ---- Product Grid ---- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* ---- Product Card ---- */
.product-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.product-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.10);
  transform: translateY(-2px);
}

.product-card__img-wrap {
  background: #f5f5f5;
  height: 180px;
  overflow: hidden;
  flex-shrink: 0;
  cursor: pointer;
}

.product-card__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
  display: block;
}

.product-card:hover .product-card__img-wrap img {
  transform: scale(1.04);
}

.product-card__body {
  padding: 14px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-card__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text-dark);
  line-height: 1.5;
  margin-bottom: 4px;
  cursor: pointer;
  transition: color var(--transition-base);
}

.product-card__name:hover {
  color: var(--color-primary);
}

.product-card__sku {
  font-size: 11px;
  color: var(--color-text-hint);
  line-height: 1.5;
  margin-bottom: 4px;
}

.product-card__desc {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: 12px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.product-card__price-wrap {
  margin-bottom: 12px;
}

.product-card__price-row {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 4px;
}

.product-card__price {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.5;
}

.product-card__gst {
  font-size: 11px;
  color: var(--color-text-muted);
}

.product-card__rrp {
  font-size: 11px;
  color: var(--color-text-hint);
  text-decoration: line-through;
}

/* Stock Badge */
.stock-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 16px;
}

.stock-badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.stock-badge--in {
  background: #e8f5e9;
  color: #28a745;
}

.stock-badge--in .stock-badge__dot {
  background: #28a745;
}

.stock-badge--low {
  background: #fff9e5;
  color: #ff9800;
}

.stock-badge--low .stock-badge__dot {
  background: #ff9800;
}

.stock-badge--out {
  background: #ffe7e5;
  color: var(--color-primary);
}

.stock-badge--out .stock-badge__dot {
  background: var(--color-primary);
}

/* Action Buttons */
.product-card__actions {
  display: flex;
  gap: 8px;
  margin-top: auto;
}

.product-card__cart-btn {
  flex: 1;
  height: 48px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: var(--color-primary);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.product-card__cart-btn:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 4px 12px rgba(227, 30, 36, 0.35);
}

.product-card__cart-btn--notify {
  background: #ffc107;
}

.product-card__cart-btn--notify:hover {
  background: #e0a800;
  box-shadow: 0 4px 12px rgba(255, 193, 7, 0.35);
}

.product-card__cart-btn img {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  filter: brightness(0) invert(1);
}

.product-card__cart-btn--notify img {
  filter: brightness(0) invert(1);
}

.product-card__wishlist-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.product-card__wishlist-btn:hover {
  background: #fff5f5;
  border-color: var(--color-primary);
}

.product-card__wishlist-btn.is-active {
  background: #fff5f5;
  border-color: var(--color-primary);
}

.product-card__wishlist-btn img {
  width: 20px;
  height: 20px;
}

/* ---- Pagination + Per Page ---- */
.shop-pagination-bar {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.pagination {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pagination__btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(44, 44, 44, 0.4);
  background: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-base),
              background var(--transition-base);
}

.pagination__btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  background: #fff5f5;
}

.pagination__btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.pagination__btn img {
  width: 20px;
  height: 20px;
}

.pagination__pages {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pagination__page {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: #fff;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition-base),
              background var(--transition-base),
              color var(--transition-base);
}

.pagination__page:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination__page.is-active {
  border-color: var(--color-primary);
  background: #fff;
  color: var(--color-primary);
}

.pagination__page--red {
  border-color: var(--color-primary) !important;
  color: var(--color-primary) !important;
}

.pagination__page:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.pagination__page--ellipsis {
  border-color: transparent;
  background: transparent;
}

.per-page {
  display: flex;
  align-items: center;
  gap: 12px;
}

.per-page__label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
}

.per-page__options {
  display: flex;
  align-items: center;
  gap: 8px;
}

.per-page__btn {
  height: 40px;
  min-width: 40px;
  padding: 0 8px;
  border-radius: var(--radius-md);
  border: none;
  background: #f5f5f5;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition-base),
              color var(--transition-base);
}

.per-page__btn:hover {
  background: #ffe0e0;
  color: var(--color-primary);
}

.per-page__btn.is-active {
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
}

.per-page__text {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* =============================================
   TOAST NOTIFICATION
   ============================================= */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--color-text-dark);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 9999;
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast svg,
.toast img {
  width: 16px;
  height: 16px;
  color: #4caf50;
  flex-shrink: 0;
}

/* =============================================
   RESPONSIVE — TABLET (≤ 1100px)
   ============================================= */
@media (max-width: 1100px) {
  .shop-main {
    padding: 20px 24px 40px;
    gap: 14px;
  }

  .shop-breadcrumb {
    padding: 10px 24px;
  }

  .shop-sidebar {
    width: 260px;
  }

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

/* =============================================
   RESPONSIVE — MOBILE (≤ 768px)
   ============================================= */
@media (max-width: 768px) {
  .shop-breadcrumb {
    padding: 10px 16px;
  }

  .shop-main {
    flex-direction: column;
    padding: 16px;
    gap: 12px;
  }

  .shop-sidebar {
    width: 100%;
  }

  .sidebar-card--filters .filters-body {
    max-height: 0;
    overflow: hidden;
    padding: 0;
    transition: max-height 0.3s ease, padding 0.3s ease;
  }

  .sidebar-card--filters.is-expanded .filters-body {
    max-height: 9999px;
    padding: 16px;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .product-card__cart-btn {
    font-size: 13px;
    height: 40px;
  }

  .product-card__wishlist-btn {
    width: 40px;
    height: 40px;
  }

  .shop-pagination-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

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