/* ===========================================
   DVD Sales Site - Full Scratch CSS
   Mobile First Design
   =========================================== */

/* CSS Variables */
:root {
  /* Colors */
  --color-bg-dark: #192330;
  --color-bg-dark-hover: #1e2a3a;
  --color-focus: #3A434E;
  --color-bg-content: #f8f9fa;
  --color-bg-white: #ffffff;
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #6c757d;
  --color-text-light: #e0e0e0;
  --color-text-muted: #9ca3af;
  --color-accent: #e63946;
  --color-accent-hover: #d62839;
  --color-link: #4a9eff;
  --color-link-hover: #2d8bff;
  --color-border: #dee2e6;
  --color-border-dark: #2d3748;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-gold: #ffd700;
  --color-silver: #c0c0c0;
  --color-bronze: #cd7f32;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", 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;

  /* Layout */
  --nav-width: 260px;
  --header-height: 56px;
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --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, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

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

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-content);
  min-height: 100vh;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-link-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* ===========================================
   Layout
   =========================================== */

/* Mobile: Single column */
.layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Mobile Header */
.mobile-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-bg-dark);
  height: var(--header-height);
}

.mobile-header__logo {
  color: var(--color-text-light);
  font-size: var(--font-size-lg);
  font-weight: bold;
  width: 50%;
}

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

.mobile-header__actions a {
    position: relative;
    font-size: 20px;
    color: #fff;
}

.cart-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  background-color: var(--color-accent);
  color: white;
  font-size: 11px;
  font-weight: bold;
  line-height: 18px;
  text-align: center;
  border-radius: 9px;
}

.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  color: var(--color-text-light);
}

.hamburger-btn > span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: currentColor;
  margin: 3px 0;
  transition: var(--transition-base);
}

/* Side Navigation */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-bg-dark);
  z-index: 1100;
  transform: translateX(-100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

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

.side-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border-dark);
}

.side-nav__logo {
  color: var(--color-text-light);
  font-size: var(--font-size-xl);
  font-weight: bold;
}

.side-nav__close {
  color: var(--color-text-light);
  font-size: var(--font-size-2xl);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
}

/* Cart Summary in Nav */
.cart-summary {
  padding: var(--space-md);
  background-color: var(--color-bg-content);
  margin: var(--space-md);
  border-radius: var(--border-radius);
}

.cart-summary__title {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-xs);
}

.cart-summary__info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-primary);
}

.cart-summary__total {
  font-size: var(--font-size-xl);
  font-weight: bold;
}

.cart-summary__count {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Nav Menu */
.nav-menu {
  padding: var(--space-md);
}

.nav-section {
  margin-bottom: var(--space-md);
}

.nav-section__title {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-sm) 0;
}

.nav-item {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-light);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast);
}

.nav-item:hover,
.nav-item.is-active {
  background-color: var(--color-focus);
  color: var(--color-text-light);
}

.nav-item i {
  margin-right: var(--space-sm);
  width: 20px;
  text-align: center;
}

/* Accordion Menu */
.accordion {
  border-bottom: 1px solid var(--color-border-dark);
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-md);
  color: var(--color-text-light);
  font-size: var(--font-size-base);
  text-align: left;
  transition: background-color var(--transition-fast);
}

.accordion__trigger:hover {
  background-color: var(--color-focus);
}

.accordion__trigger i.fa-chevron-down {
  transition: transform var(--transition-base);
}

.accordion.is-open .accordion__trigger i.fa-chevron-down {
  transform: rotate(180deg);
}

.accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.accordion.is-open .accordion__content {
  max-height: 500px;
}

.accordion__list {
  padding: 0 var(--space-md) var(--space-md);
}

.accordion__item {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.accordion__item:hover,
.accordion__item.is-active {
  background-color: var(--color-focus);
  color: var(--color-text-light);
}

.accordion__item-count {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

/* Nav Footer */
.nav-footer {
  padding: var(--space-md);
  border-top: 1px solid var(--color-border-dark);
  margin-top: auto;
}

.nav-footer__copyright {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  text-align: center;
}

/* Overlay */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
  padding-bottom: var(--space-2xl);
}

/* Full Bleed Container (edge-to-edge within main-content) */
.full-bleed {
  margin-left: calc(var(--space-md) * -1);
  margin-right: calc(var(--space-md) * -1);
  margin-top: calc(var(--space-md) * -1);
}

.full-bleed--no-radius .banner-slider {
  border-radius: 0;
  margin-bottom: var(--space-md);
}

/* ===========================================
   Components
   =========================================== */

/* Search Bar */
.search-bar {
  position: relative;
  margin-bottom: var(--space-md);
}

.search-bar__input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  padding-left: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-bg-white);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-bar__input:focus {
  outline: none;
  border-color: var(--color-link);
  box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

.search-bar__icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
}

/* Word Cloud */
.word-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: var(--space-md);
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-md);
}

.word-cloud__item {
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-bg-content);
  border-radius: var(--border-radius-sm);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.word-cloud__item:hover {
  background-color: var(--color-accent);
  color: var(--color-bg-white);
}

/* Section */
.section {
  margin-bottom: var(--space-xl);
}

.section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.section__title {
  font-size: var(--font-size-lg);
  font-weight: bold;
  color: var(--color-text-primary);
}

.section__more {
  font-size: var(--font-size-sm);
  color: var(--color-link);
}

/* Product Card */
.product-card {
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

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

.product-card__image-wrap {
  position: relative;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background-color: var(--color-bg-content);
  flex-shrink: 0;
}

.product-card__image-link {
  display: block;
  width: 100%;
  height: 100%;
}

.product-card__image {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.product-card:hover .product-card__image {
  transform: scale(1.05);
}

.product-card__badge {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background-color: var(--color-accent);
  color: var(--color-bg-white);
  font-size: var(--font-size-xs);
  font-weight: bold;
  border-radius: var(--border-radius-sm);
}

.product-card__rank {
    position: absolute;
    top: 0;
    left: var(--space-sm);
    font-size: 3rem;
    font-weight: bold;
    font-style: italic;
    color: var(--color-bg-white);
    opacity: 0.8;
    mix-blend-mode: normal;
    line-height: 1;
}

.product-card__rank--1 { color: var(--color-gold); }
.product-card__rank--2 { color: var(--color-silver); }
.product-card__rank--3 { color: var(--color-bronze); }
.product-card__rank--default { color: var(--color-bg-white); }

.product-card__favorite {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background-color: rgba(0, 0, 0, 0.6);
  color: var(--color-text-light);
  font-size: var(--font-size-xs);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast);
}

.product-card__favorite:hover {
  background-color: var(--color-accent);
}

.product-card__favorite.is-active {
  background-color: var(--color-accent);
}

.product-card__purchase-info {
  position: absolute;
  bottom: var(--space-sm);
  left: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background-color: rgba(230, 57, 70, 0.9);
  color: var(--color-bg-white);
  font-size: var(--font-size-xs);
  border-radius: var(--border-radius-sm);
}

.product-card__body {
  padding: var(--space-sm);
}

.product-card__title {
  font-size: var(--font-size-sm);
  font-weight: bold;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
  /* 2行分の高さを確保してカードの高さを揃える */
  height: calc(var(--font-size-sm) * 1.4 * 2);
}

.product-card__actress {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.product-card__actress a {
  color: var(--color-text-secondary);
}

.product-card__actress a:hover {
  color: var(--color-link);
}

.product-card__actions {
  display: flex;
  gap: var(--space-sm);
}

.product-card__cart-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm);
  background-color: var(--color-accent);
  color: var(--color-bg-white);
  font-size: var(--font-size-sm);
  font-weight: bold;
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast);
}

.product-card__cart-btn:hover {
  background-color: var(--color-accent-hover);
}

.product-card__cart-btn.is-in-cart {
  mix-blend-mode: luminosity;
  opacity: 0.5;
  pointer-events: none;
}

/* Product Grid */
.product-grid {
  display: grid;
  /* grid-template-columns: repeat(2, 1fr); */
  gap: var(--space-md);
}

/* Product Slider */
.product-slider-wrap {
  position: relative;
  margin: 0 calc(var(--space-md) * -1);
}

.product-slider {
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  padding: 0 var(--space-md);
  padding-bottom: var(--space-sm);
}

.product-slider::-webkit-scrollbar {
  height: 4px;
}

.product-slider::-webkit-scrollbar-track {
  background: var(--color-bg-content);
}

.product-slider::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}

/* モバイル: 1作品表示 + 2作品目見切れ */
.product-slider .product-card {
  flex: 0 0 calc((100% - var(--space-sm)) / 1.3);
  min-width: calc((100% - var(--space-sm)) / 1.3);
  scroll-snap-align: start;
}

.product-slider__more {
  flex: 0 0 calc((100% - var(--space-sm)) / 1.3);
  min-width: calc((100% - var(--space-sm)) / 1.3);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  color: var(--color-link);
  font-size: var(--font-size-sm);
  font-weight: bold;
  box-shadow: var(--shadow-sm);
  text-align: center;
  padding: var(--space-md);
}

/* Slider Arrows */
.product-slider__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-70%);
  width: 36px;
  height: 36px;
  display: none;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.95);
  color: var(--color-text-primary);
  border-radius: 50%;
  font-size: var(--font-size-base);
  box-shadow: var(--shadow-md);
  z-index: 10;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.product-slider__arrow:hover {
  background-color: var(--color-bg-white);
  box-shadow: var(--shadow-lg);
}

.product-slider__arrow--prev {
  left: var(--space-xs);
}

.product-slider__arrow--next {
  right: var(--space-xs);
}

/* Banner */
.banner {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.banner__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* Banner Slider */
.banner-slider {
  position: relative;
  margin-bottom: var(--space-md);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.banner-slider__track {
  display: flex;
  transition: transform 0.5s ease-in-out;
}

.banner-slider__slide {
  flex: 0 0 100%;
  min-width: 100%;
}

.banner-slider__slide img {
  width: 100%;
  object-fit: cover;
  display: block;
}

.banner-slider__slide a {
  display: block;
}

.banner-slider__dots {
  position: absolute;
  bottom: var(--space-sm);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-xs);
}

.banner-slider__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background-color var(--transition-fast);
}

.banner-slider__dot.is-active,
.banner-slider__dot:hover {
  background-color: var(--color-bg-white);
}

.banner-slider__prev,
.banner-slider__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.4);
  color: var(--color-bg-white);
  border-radius: 50%;
  font-size: var(--font-size-base);
  transition: background-color var(--transition-fast);
  cursor: pointer;
}

.banner-slider__prev:hover,
.banner-slider__next:hover {
  background-color: rgba(0, 0, 0, 0.7);
}

.banner-slider__prev {
  left: var(--space-sm);
}

.banner-slider__next {
  right: var(--space-sm);
}

/* Hide prev/next buttons on mobile, show dots */
@media (max-width: 599px) {
  .banner-slider__prev,
  .banner-slider__next {
    display: none;
  }
}

/* Info Box */
.info-box {
  display: block;
  margin-bottom: var(--space-md);
}

@media (min-width: 769px) {
  .info-box {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
  }
}

.info-box__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-md);
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  text-align: center;
}

.info-box__icon {
  font-size: var(--font-size-2xl);
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.info-box__text {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  line-height: 1.4;
}

/* News List */
.news-list {
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  max-height: 200px;
  overflow-y: auto;
}

.news-list__item {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
}

.news-list__item:last-child {
  border-bottom: none;
}

.news-list__date {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.news-list__title {
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Notice Box */
.notice-box {
  padding: var(--space-md);
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
}

.notice-box__title {
  font-size: var(--font-size-base);
  font-weight: bold;
  margin-bottom: var(--space-sm);
}

.notice-box__content {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-height: 200px;
  overflow-y: auto;
}

.notice-box--clickable {
  cursor: pointer;
  transition: background-color 0.2s;
}

.notice-box--clickable:hover {
  background-color: var(--color-bg-tertiary);
}

.notice-box__more {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-accent);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  background-color: rgba(0, 0, 0, 0.7);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal.is-open {
  opacity: 1;
  visibility: visible;
}

.modal__content {
  position: relative;
  width: 100%;
  max-width: 600px;
  max-height: 80vh;
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s;
}

.modal.is-open .modal__content {
  transform: scale(1);
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  font-weight: bold;
}

.modal__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  cursor: pointer;
}

.modal__close:hover {
  color: var(--color-text-primary);
}

.modal__body {
  padding: var(--space-md);
  max-height: calc(80vh - 60px);
  overflow-y: auto;
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-weight: bold;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-bg-white);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-bg-white);
}

.btn--secondary {
  background-color: var(--color-bg-content);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

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

.btn--block {
  width: 100%;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: bold;
  color: var(--color-text-primary);
  margin-bottom: var(--space-xs);
}

.form-label--required::after {
  content: "*";
  color: var(--color-accent);
  margin-left: var(--space-xs);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-bg-white);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-link);
  box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  margin-top: var(--space-xs);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-xl);
}

.pagination__item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-sm);
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.pagination__item:hover {
  background-color: var(--color-bg-content);
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
}

.pagination__item.is-active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg-white);
}

.pagination__item.is-disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* Sort Select */
.sort-select {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.sort-select__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.sort-select__select {
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background-color: var(--color-bg-white);
  font-size: var(--font-size-sm);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.breadcrumb__item::after {
  content: "/";
  color: var(--color-border);
}

.breadcrumb__item:last-child::after {
  content: none;
}

.breadcrumb__link {
  color: var(--color-text-muted);
}

.breadcrumb__link:hover {
  color: var(--color-link);
}

/* Page Title */
.page-title {
  font-size: var(--font-size-2xl);
  font-weight: bold;
  color: var(--color-text-primary);
  margin-bottom: var(--space-lg);
}

/* ===========================================
   Utilities
   =========================================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-accent { color: var(--color-accent); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.font-bold { font-weight: bold; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* htmx loading indicator */
.htmx-request .htmx-indicator {
  display: inline-block;
}

.htmx-indicator {
  display: none;
}

/* ===========================================
   Desktop Styles (min-width: 1000px)
   =========================================== */

@media (min-width: 1000px) {
  /* Hide mobile header */
  .mobile-header {
    display: none;
  }

  /* Show side nav always */
  .side-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--nav-width);
    height: 100vh;
    transform: translateX(0);
    display: flex;
    flex-direction: column;
  }

  .side-nav__close {
    display: none;
  }

  .overlay {
    display: none;
  }

  /* Main content with sidebar offset */
  .main-content {
    margin-left: var(--nav-width);
    padding: var(--space-xl);
    max-width: 1200px;
  }

  /* Full bleed adjustment for desktop padding */
  .full-bleed {
    margin-left: calc(var(--space-xl) * -1);
    margin-right: calc(var(--space-xl) * -1);
    margin-top: calc(var(--space-xl) * -1);
  }

  .full-bleed--no-radius .banner-slider {
    margin-bottom: var(--space-xl);
  }

  /* Product Grid - 3 columns on desktop */
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Product Slider - show more items */
  .product-slider-wrap {
    margin: 0;
  }

  .product-slider {
    padding-left: 0;
    padding-right: 0;
    gap: var(--space-md);
  }

  /* デスクトップ: 3作品表示 + 4作品目見切れ */
  .product-slider .product-card {
    flex: 0 0 calc((100% - var(--space-md) * 3) / 3.3);
    min-width: calc((100% - var(--space-md) * 3) / 3.3);
  }

  .product-slider__more {
    flex: 0 0 calc((100% - var(--space-md) * 3) / 3.3);
    min-width: calc((100% - var(--space-md) * 3) / 3.3);
  }

  /* Show slider arrows on desktop */
  .product-slider__arrow {
    display: flex;
  }

  .product-slider__arrow--prev {
    left: calc(var(--space-md) * -1);
  }

  .product-slider__arrow--next {
    right: calc(var(--space-md) * -1);
  }

  /* Larger fonts for desktop */
  .section__title {
    font-size: var(--font-size-xl);
  }

  .page-title {
    font-size: var(--font-size-3xl);
  }

  /* Info Box - horizontal on desktop */
  .info-box {
    gap: var(--space-md);
  }

  .info-box__item {
    flex-direction: row;
    text-align: left;
    gap: var(--space-md);
  }

  .info-box__icon {
    margin-bottom: 0;
  }

  .info-box__text {
    font-size: var(--font-size-sm);
  }
}

/* ===========================================
   Large Desktop (min-width: 1400px)
   =========================================== */

@media (min-width: 1400px) {
  .product-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* 大画面: 5作品表示 + 6作品目見切れ */
  .product-slider .product-card {
    flex: 0 0 calc((100% - var(--space-md) * 5) / 5.3);
    min-width: calc((100% - var(--space-md) * 5) / 5.3);
  }

  .product-slider__more {
    flex: 0 0 calc((100% - var(--space-md) * 5) / 5.3);
    min-width: calc((100% - var(--space-md) * 5) / 5.3);
  }
}
/* Detail Page Specific Styles */
.detail-layout {
  display: grid;
  gap: var(--space-lg);
}

.detail-image {
  aspect-ratio: 3/2;
  overflow: hidden;
  border-radius: var(--border-radius);
  background-color: var(--color-bg-content);
}

.detail-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

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

.detail-title {
  font-size: var(--font-size-xl);
  font-weight: bold;
  line-height: 1.4;
}

.detail-title .badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  background: linear-gradient(135deg, #2196f3, #1976d2);
  color: white;
  font-size: var(--font-size-xs);
  border-radius: var(--border-radius-sm);
  margin-left: var(--space-sm);
  vertical-align: middle;
}

.detail-meta {
  display: grid;
  gap: var(--space-sm);
}

.detail-meta__row {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
}

.detail-meta__label {
  flex: 0 0 100px;
  color: var(--color-text-muted);
}

.detail-meta__value {
  flex: 1;
}

.detail-comment {
  padding: var(--space-md);
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.detail-price-box {
  padding: var(--space-md);
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  border: 2px solid var(--color-accent);
}

.detail-price-box__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.detail-price-box__plan {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.detail-price-box__plan label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.detail-price-box__plan select {
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
}

.detail-price-box__price {
  font-size: var(--font-size-2xl);
  font-weight: bold;
  color: var(--color-accent);
  white-space: nowrap;
}

.detail-actions {
  display: flex;
  gap: var(--space-sm);
}

.detail-actions .btn {
  flex: 1;
  padding: var(--space-md);
}

@media (min-width: 768px) {
  .detail-layout {
    align-items: start;
  }
}

/* ===========================================
   Site Footer
   =========================================== */
.site-footer {
  margin-top: auto;
  margin-left: calc(var(--space-md) * -1);
  margin-right: calc(var(--space-md) * -1);
  margin-bottom: calc(var(--space-2xl) * -1);
  padding-top: 50px;
}
.site-footer__inner-container {
  padding: 10px;
  background-color: var(--color-bg-dark);
  color: var(--color-text-light);
}
@media (min-width: 769px) {
  .site-footer {
    margin-left: calc(var(--space-xl) * -1);
    margin-right: calc(var(--space-xl) * -1);
  }
}

.site-footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  align-items: center;
}

.site-footer__logo {
  flex-shrink: 0;
}

.site-footer__logo img {
  max-width: 200px;
  height: auto;
}

.site-footer__content {
  flex: 1;
  min-width: 280px;
}

.site-footer__text {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.site-footer__copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  opacity: 0.7;
}

@media (max-width: 768px) {
  .site-footer__inner {
    flex-direction: column;
    text-align: center;
  }
  .site-footer__text br {
    display: none;
  }
  .side-nav__logo {
    width: 50%;
  }
}