/* ============================================
   Kanto Keepsakes — Global Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

ul,
ol {
  list-style: none;
}

a {
  text-decoration: none;
  color: inherit;
}

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-white: #ffffff;
  --color-off-white: #fafafa;
  --color-yellow: #f5c518;
  --color-yellow-light: #fde68a;
  --color-yellow-dark: #d4a017;
  --color-black: #1a1a1a;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-500: #6b7280;
  --color-gray-700: #374151;
  --color-gray-900: #111827;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 64px;
  --border-radius: 8px;
  --border-radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* --- Base Typography --- */
body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-gray-900);
  background-color: var(--color-white);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

@media (min-width: 768px) {
  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }
  h3 { font-size: var(--font-size-2xl); }
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --- Site Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  height: var(--header-height);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: 100%;
}

.logo-link {
  display: flex;
  align-items: center;
}

.logo {
  height: 44px;
  width: auto;
}

/* --- Hamburger Menu Button --- */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: 110;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-gray-900);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Navigation Backdrop --- */
.nav-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.4);
  z-index: 104;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.nav-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

/* --- Navigation Overlay --- */
.nav-overlay {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  height: 100vh;
  background-color: var(--color-white);
  box-shadow: -4px 0 15px rgba(0, 0, 0, 0.1);
  transform: translateX(100%);
  transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 105;
  padding-top: calc(var(--header-height) + var(--space-xl));
  overflow-y: auto;
}

.nav-overlay.is-open {
  transform: translateX(0);
}

/* Lock body scroll when menu is open */
body.nav-open {
  overflow: hidden;
}

.nav-list {
  display: flex;
  flex-direction: column;
  padding: 0 var(--space-lg);
}

.nav-link {
  display: block;
  padding: var(--space-md) 0;
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-gray-700);
  border-bottom: 1px solid var(--color-gray-100);
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-yellow-dark);
}

.nav-link:focus-visible {
  outline: 2px solid var(--color-yellow);
  outline-offset: 2px;
  border-radius: 4px;
}

.nav-cart {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.cart-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 6px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-black);
  background-color: var(--color-yellow);
  border-radius: 11px;
}

/* --- Main Content --- */
.main-content {
  min-height: calc(100vh - var(--header-height) - 60px);
}

.hero {
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
  background-color: var(--color-off-white);
}

.hero h1 {
  margin-bottom: var(--space-sm);
}

.hero p {
  color: var(--color-gray-500);
  font-size: var(--font-size-lg);
}

/* --- Home Categories --- */
.categories {
  padding: var(--space-2xl) var(--space-md);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
}

@media (min-width: 768px) {
  .categories {
    grid-template-columns: 1fr 1fr;
    padding: var(--space-3xl) var(--space-md);
  }
}

.category-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Large category card */
.category-card {
  display: flex;
  align-items: flex-end;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.category-card:focus-visible {
  outline: 3px solid var(--color-yellow);
  outline-offset: 2px;
}

.category-card--large {
  min-height: 220px;
  padding: var(--space-xl);
  background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-700) 100%);
}

@media (min-width: 768px) {
  .category-card--large {
    min-height: 260px;
  }
}

.category-card--japanese {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.category-card--english {
  background: linear-gradient(135deg, #2d1b00 0%, #4a2c0a 50%, #6b3f1a 100%);
}

.category-card--large .category-card-title {
  color: var(--color-white);
  font-size: var(--font-size-3xl);
}

@media (min-width: 768px) {
  .category-card--large .category-card-title {
    font-size: var(--font-size-4xl);
  }
}

.category-card--large .category-card-subtitle {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-base);
}

/* Subcategory grid */
.subcategory-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}

@media (min-width: 768px) {
  .subcategory-grid {
    gap: var(--space-md);
  }
}

/* Small category card */
.category-card--small {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-lg) var(--space-sm);
  background-color: var(--color-off-white);
  border: 1px solid var(--color-gray-200);
}

.category-card--small .category-card-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-gray-900);
}

@media (min-width: 768px) {
  .category-card--small .category-card-title {
    font-size: var(--font-size-lg);
  }
}

.category-card--small .category-card-subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-xs);
}

.category-card--small:hover {
  background-color: var(--color-yellow-light);
  border-color: var(--color-yellow);
}

/* --- Footer --- */
.site-footer {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  background-color: var(--color-gray-100);
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
}

/* --- Product Card (base styles) --- */
.product-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-fast);
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.product-card-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background-color: var(--color-gray-100);
}

.product-card-body {
  padding: var(--space-md);
}

.product-card-name {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

/* --- Image Placeholder --- */
.product-card-image-wrapper,
.cart-item-image-wrapper {
  position: relative;
  background-color: var(--color-gray-100);
}

.product-card-image-wrapper {
  aspect-ratio: 1 / 1;
}

.cart-item-image-wrapper {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--border-radius);
  overflow: hidden;
}

.image-placeholder {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  color: var(--color-gray-300);
  background-color: var(--color-gray-100);
}

.image-placeholder span {
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.has-placeholder .product-card-image,
.has-placeholder .cart-item-image {
  display: none;
}

.has-placeholder .image-placeholder {
  display: flex;
}

.product-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

.product-card-price {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-sm);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background-color: var(--color-yellow);
  color: var(--color-black);
}

.btn-primary:hover {
  background-color: var(--color-yellow-dark);
}

.btn-full {
  width: 100%;
}

/* --- Badges --- */
.badge {
  display: inline-block;
  padding: 2px 10px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: 4px;
  margin-bottom: var(--space-sm);
}

.badge--preorder {
  background-color: var(--color-yellow-light);
  color: var(--color-yellow-dark);
}

.badge--oos {
  background-color: var(--color-gray-200);
  color: var(--color-gray-500);
}

/* --- Sort / Filter Bar --- */
/* --- Sub-Navigation Tabs --- */
.subnav {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  flex-wrap: wrap;
}

.subnav-tab {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-500);
  background: none;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.subnav-tab:hover {
  color: var(--color-gray-900);
  border-color: var(--color-gray-300);
}

.subnav-tab--active {
  background-color: var(--color-yellow);
  color: var(--color-black);
  border-color: var(--color-yellow);
  font-weight: 600;
}

/* The sub-navigation is anchors now, so it needs the button defaults back. */
.subnav a.subnav-tab {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

/* --- No Products Message --- */
.no-products {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
  color: var(--color-gray-500);
  font-size: var(--font-size-lg);
}

/* --- Cart Toast --- */
/* --- Page Header (category/product pages) --- */
.page-header {
  padding: var(--space-xl) 0 var(--space-md);
}

.page-header h1 {
  margin-bottom: var(--space-xs);
}

.page-header p {
  color: var(--color-gray-500);
  font-size: var(--font-size-base);
}

/* --- Breadcrumb --- */
.breadcrumb {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-sm);
}

.breadcrumb a {
  color: var(--color-yellow-dark);
  font-weight: 500;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* --- Product Grid --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-xl) 0;
}

@media (min-width: 768px) {
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
}

/* --- Cart Page --- */
.cart-container {
  padding-bottom: var(--space-3xl);
}

.cart-empty {
  text-align: center;
  padding: var(--space-3xl) var(--space-md);
}

.cart-empty p {
  color: var(--color-gray-500);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-lg);
}

/* Cart Item Row */
.cart-item {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

@media (min-width: 768px) {
  .cart-item {
    grid-template-columns: 90px 1fr auto;
    gap: var(--space-lg);
  }
}

.cart-item-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--border-radius);
  background-color: var(--color-gray-100);
}

.cart-item-details {
  min-width: 0;
}

.cart-item-name {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cart-item-price {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.cart-item-controls {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-sm);
}

/* Quantity Controls */
.qty-control {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.qty-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-lg);
  color: var(--color-gray-700);
  transition: background-color var(--transition-fast);
}

.qty-btn:hover {
  background-color: var(--color-gray-100);
}

.qty-value {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-left: 1px solid var(--color-gray-300);
  border-right: 1px solid var(--color-gray-300);
}

.cart-item-subtotal {
  font-size: var(--font-size-base);
  font-weight: 700;
}

.btn-remove {
  background: none;
  border: none;
  color: var(--color-gray-500);
  font-size: var(--font-size-xs);
  cursor: pointer;
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.btn-remove:hover {
  color: #dc2626;
}

/* Cart Summary */
.cart-summary {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 2px solid var(--color-gray-900);
  max-width: 400px;
  margin-left: auto;
}

.cart-summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.btn-checkout {
  margin-bottom: var(--space-sm);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-300);
}

.btn-secondary:hover {
  background-color: var(--color-gray-100);
}

/* --- Empty-shop block and hero note (added 2026-09-13) --- */

/* .hero p is more specific than a bare class, so match its specificity. */
.hero p.hero-note {
  max-width: 46rem;
  margin: var(--space-md) auto var(--space-lg);
  font-size: var(--font-size-base);
  color: var(--color-gray-700);
}

.no-products p {
  margin: 0 0 var(--space-sm);
}

.no-products .no-products-note {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
}

.no-products .btn {
  margin-top: var(--space-sm);
}