/* ==========================================================================
   cart/index.php のページ固有CSS
   出典: 元HTMLの <style> をそのまま外部化したもの。値の統合・整理はしていない。
   ========================================================================== */

/* ==========================================================================
   Grand Design Tokens & Reset
   ========================================================================== */
:root {
  --color-primary: #3F6654;        /* ディープグリーン (メインCTA・重要要素) */
  --color-primary-hover: #325344;
  --color-sub: #E8F0EB;            /* ソフトグリーン (セクション背景・タグ) */
  --color-sub-light: #F2F7F4;
  --color-accent: #D9824B;         /* ウォームオレンジ (重要通知・アクセント) */
  --color-bg-base: #FFFFFF;        /* ベース背景 */
  --color-bg-sub: #F7F8F6;         /* サブ背景 */
  --color-text-main: #2B2B2B;      /* メインテキスト */
  --color-text-sub: #666666;       /* サブテキスト */
  --color-text-muted: #888888;
  --color-border: #E2E6E3;
  --color-border-dark: #C8D1CA;

  --font-family-base: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max-width: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-subtle: 0 4px 20px rgba(63, 102, 84, 0.06);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.04);
  --transition-fast: 0.2s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family-base);
  color: var(--color-text-main);
  background-color: var(--color-bg-sub);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

img, svg {
  vertical-align: middle;
  max-width: 100%;
  height: auto;
}

/* Accessibility Focus */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* ==========================================================================
   Header Component (Grand共通設計)
   ========================================================================== */
.site-header {
  background-color: var(--color-bg-base);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-primary);
}

.brand-logo img {
  width: auto;
  height: 40px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-main);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.header-nav-link:hover {
  background-color: var(--color-sub);
  color: var(--color-primary);
}

.header-nav-link svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

.cart-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  border-radius: 10px;
  line-height: 1;
}

/* ==========================================================================
   Breadcrumb Component
   ========================================================================== */
.breadcrumb-area {
  background-color: var(--color-bg-base);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  list-style: none;
  font-size: 14px;
  color: var(--color-text-sub);
  gap: 8px;
}

.breadcrumb-item a {
  color: var(--color-text-sub);
}

.breadcrumb-item a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--color-text-muted);
  font-size: 12px;
  user-select: none;
}

.breadcrumb-item[aria-current="page"] {
  color: var(--color-text-main);
  font-weight: 500;
}

/* ==========================================================================
   Main Content Area
   ========================================================================== */
.main-content {
  flex: 1;
  padding: 40px 24px 80px;
}

.cart-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Page Heading H1 */
.page-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 32px;
  letter-spacing: 0.02em;
  position: relative;
  padding-bottom: 12px;
}

.page-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

/* Cart Layout Grid */
.cart-layout {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 40px;
  align-items: start;
}

/* Cart Items Container */
.cart-items-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.cart-item-card {
  background-color: var(--color-bg-base);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 24px;
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 24px;
  align-items: start;
  box-shadow: var(--shadow-card);
  position: relative;
}

/* Product Thumbnail Area */
.item-thumbnail-box {
  width: 110px;
  height: 110px;
  background-color: var(--color-bg-sub);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 6px;
}

.item-thumbnail-box img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.item-thumbnail-box svg {
  width: 80px;
  height: 80px;
}

/* Item Details */
.item-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.item-title-link {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.5;
}

.item-title-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.item-variations-list {
  list-style: none;
  font-size: 14px;
  color: var(--color-text-sub);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.item-variations-list li {
  display: flex;
  gap: 8px;
}

.item-unit-price {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-main);
  margin-top: 4px;
}

/* Item Controls & Subtotal */
.item-actions-box {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  height: 100%;
  min-height: 110px;
  gap: 16px;
}

/* Stepper UI */
.quantity-control-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.quantity-label {
  font-size: 14px;
  color: var(--color-text-sub);
  font-weight: 500;
}

.stepper {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-base);
  overflow: hidden;
  height: 40px;
}

.stepper-btn {
  width: 38px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-main);
  background-color: var(--color-bg-sub);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  user-select: none;
}

.stepper-btn:hover:not(:disabled) {
  background-color: var(--color-sub);
  color: var(--color-primary);
}

.stepper-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  background-color: var(--color-bg-sub);
}

.stepper-value {
  width: 44px;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-main);
}

.item-subtotal-block {
  text-align: right;
}

.item-subtotal-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-main);
}

.item-subtotal-amount {
  font-size: 18px;
  color: var(--color-primary);
}

.btn-remove-item {
  font-size: 14px;
  color: var(--color-text-muted);
  text-decoration: underline;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 6px;
  border-radius: 4px;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.btn-remove-item:hover {
  color: #b33924;
  background-color: #fdf2f0;
  text-decoration: none;
}

/* ==========================================================================
   Order Summary Sidebar (Sticky)
   ========================================================================== */
.cart-summary-sidebar {
  background-color: var(--color-bg-base);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 32px 28px;
  box-shadow: var(--shadow-subtle);
  position: sticky;
  top: 100px;
}

.summary-heading {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-main);
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-sub);
  margin-bottom: 24px;
}

.summary-rows {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 15px;
  color: var(--color-text-sub);
}

.summary-row.shipping-note-row {
  display: block;
  margin-top: -8px;
  text-align: right;
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 500;
}

.summary-row-val {
  font-weight: 700;
  color: var(--color-text-main);
  font-size: 16px;
}

.summary-divider {
  height: 1px;
  background-color: var(--color-border);
  margin: 8px 0;
}

.summary-row.total-row {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-main);
  padding-top: 8px;
}

.total-price-large {
  font-size: 26px;
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Notice: Shipping info */
.notice-shipping-box {
  background-color: var(--color-bg-sub);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 24px;
}

.notice-shipping-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.notice-shipping-body {
  font-size: 13px;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* Payment info text */
.payment-badge-info {
  font-size: 13px;
  color: var(--color-text-sub);
  margin-bottom: 20px;
  text-align: center;
  background-color: var(--color-sub);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* Primary CTA Button */
.btn-checkout-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  height: 56px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 18px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 4px 14px rgba(63, 102, 84, 0.25);
}

.btn-checkout-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(63, 102, 84, 0.35);
}

.btn-checkout-primary svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
}

/* Secondary CTA: Continue Shopping */
.continue-shopping-wrap {
  margin-top: 36px;
}

.link-continue-shopping {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  padding: 10px 18px;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg-base);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.link-continue-shopping:hover {
  background-color: var(--color-sub);
}

/* ==========================================================================
   Empty State Component (カートが空の場合)
   ========================================================================== */
.cart-empty-view {
  /* 表示可否はPHPが決める（出力されるのは空カートのときだけ）ため display:none にしない */
  display: block;
  background-color: var(--color-bg-base);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  padding: 72px 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.empty-icon-wrap {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background-color: var(--color-sub);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.empty-icon-wrap svg {
  width: 40px;
  height: 40px;
  stroke: currentColor;
}

.empty-main-msg {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 12px;
}

.empty-sub-msg {
  font-size: 16px;
  color: var(--color-text-sub);
  margin-bottom: 36px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.btn-view-products {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  padding: 0 40px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.btn-view-products:hover {
  background-color: var(--color-primary-hover);
}

/* ==========================================================================
   Toast / Snackbar for Undo Remove
   ========================================================================== */
.toast-undo {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: #2b2b2b;
  color: #ffffff;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s;
  opacity: 0;
  font-size: 14px;
}

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

.btn-toast-undo {
  color: var(--color-accent);
  font-weight: 700;
  text-decoration: underline;
  padding: 2px 6px;
}

.btn-toast-undo:hover {
  color: #ff9a5b;
}

/* ==========================================================================
   Footer Component (Grand共通 3グループ構成)
   ========================================================================== */
.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  padding: 64px 24px 32px;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 56px;
}

.footer-group-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-links a {
  font-size: 14px;
  color: var(--color-text-sub);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 28px;
  text-align: center;
}

.copyright {
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */
@media (max-width: 900px) {
  .cart-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cart-summary-sidebar {
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 600px) {
  .cart-item-card {
    grid-template-columns: 80px 1fr;
    gap: 16px;
    padding: 18px;
  }

  .item-thumbnail-box {
    width: 80px;
    height: 80px;
  }

  .item-thumbnail-box svg {
    width: 56px;
    height: 56px;
  }

  .item-actions-box {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--color-border);
    min-height: auto;
  }

  .page-title {
    font-size: 24px;
  }
}