/* ========================================
   Home Page Styles
   モノクローム + ゴールドアクセント
   ======================================== */

/* ----------------------------------------
   1. Hero Slider
   ---------------------------------------- */
.campaign {
  position: relative;
  width: 100%;
  height: calc(100vh - 73px);
  min-height: 600px;
  overflow: hidden;
  margin-top: 73px;
}

#campaign-slider {
  display: flex;
  height: 100%;
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-slide {
  width: 100vw;
  min-width: 100vw;
  height: 100%;
  flex-shrink: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 背景模糊效果 */
.hero-slide::before {
  content: '';
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  background: var(--slide-bg, var(--color-black));
  background-size: cover;
  background-position: center;
  filter: blur(8px);
  z-index: 0;
}

/* 渐变遮罩 */
.hero-slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.6) 50%, rgba(0,0,0,0.75) 100%);
  pointer-events: none;
  z-index: 1;
}

/* ----------------------------------------
   2. Slide Type: Brand (品牌介绍)
   ---------------------------------------- */
.slide-brand-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  max-width: var(--container-xl);
  padding: var(--space-6);
  align-items: center;
  color: var(--color-white);
}

.slide-brand-text {
  text-align: left;
}

.slide-brand-badge {
  display: inline-block;
  padding: var(--space-2) var(--space-6);
  border: 1px solid var(--color-gray-400);
  color: var(--color-gray-300);
  font-size: var(--text-xs);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.slide-brand-title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: var(--font-light);
  letter-spacing: 0.2em;
  margin-bottom: var(--space-4);
}

.slide-brand-subtitle {
  font-size: var(--text-xl);
  color: var(--color-gray-400);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-6);
}

.slide-brand-desc {
  font-size: var(--text-base);
  color: var(--color-gray-400);
  line-height: 1.8;
  margin-bottom: var(--space-8);
  max-width: 500px;
}

.slide-brand-image {
  position: relative;
}

.slide-brand-image img {
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.slide-brand-image-badge {
  position: absolute;
  bottom: var(--space-6);
  left: var(--space-6);
  background: var(--color-black);
  color: var(--color-white);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.2);
}

.slide-brand-image-badge strong {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: var(--font-light);
  color: var(--color-gold);
}

.slide-brand-image-badge span {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
}

/* ----------------------------------------
   3. Slide Type: Campaign (促销活动)
   ---------------------------------------- */
.slide-campaign-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  max-width: var(--container-xl);
  padding: var(--space-6);
  align-items: center;
}

.slide-campaign-text {
  color: var(--color-white);
}

.slide-campaign-label {
  display: inline-block;
  background: var(--color-gold);
  color: var(--color-black);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.slide-campaign-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-light);
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.slide-campaign-discount {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: var(--font-bold);
  color: var(--color-gold);
  margin-bottom: var(--space-4);
}

.slide-campaign-desc {
  font-size: var(--text-lg);
  color: var(--color-gray-400);
  margin-bottom: var(--space-8);
}

.slide-campaign-image img {
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

/* ----------------------------------------
   4. Slide Type: Product (产品推荐)
   ---------------------------------------- */
.slide-product-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  max-width: var(--container-xl);
  padding: var(--space-6);
  align-items: center;
}

.slide-product-image {
  position: relative;
}

.slide-product-image img {
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.slide-product-badge {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  background: var(--color-gold);
  color: var(--color-black);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  border-radius: var(--radius-sm);
  z-index: 5;
}

.slide-discount-badge {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: #c41e3a;
  color: var(--color-white);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  border-radius: var(--radius-sm);
  z-index: 5;
}

.slide-product-text {
  color: var(--color-white);
}

.slide-product-category {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-4);
}

.slide-product-name {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-light);
  margin-bottom: var(--space-2);
}

.slide-product-code {
  font-size: var(--text-sm);
  color: var(--color-gold);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.slide-product-desc {
  font-size: var(--text-lg);
  color: var(--color-gray-400);
  line-height: 1.8;
  margin-bottom: var(--space-6);
}

.slide-product-price {
  font-size: var(--text-3xl);
  font-weight: var(--font-semibold);
  color: var(--color-gold);
  margin-bottom: var(--space-8);
}

.slide-product-price .original {
  font-size: var(--text-lg);
  color: var(--color-gray-500);
  text-decoration: line-through;
  margin-left: var(--space-3);
  font-weight: var(--font-normal);
}

.slide-product-actions {
  display: flex;
  gap: var(--space-4);
}

/* ----------------------------------------
   5. Buttons
   ---------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
  color: var(--color-white);
  border: none;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-gold-dark) 0%, var(--color-gold) 100%);
  box-shadow: 0 4px 12px rgba(184,134,11,0.4);
}

/* ----------------------------------------
   6. Slider Controls
   ---------------------------------------- */
.slider-prev,
.slider-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-white);
  z-index: 10;
}

.slider-prev { left: var(--space-6); }
.slider-next { right: var(--space-6); }

.slider-prev:hover,
.slider-next:hover {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-black);
}

.slider-indicators {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-3);
  z-index: 10;
}

.indicator,
.hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.indicator.active,
.hero-dot.active {
  background: var(--color-gold);
  transform: scale(1.2);
}

.indicator:hover,
.hero-dot:hover {
  background: rgba(255,255,255,0.6);
}

/* Progress Bar */
.slider-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255,255,255,0.1);
  z-index: 10;
}

.slider-progress-bar {
  height: 100%;
  background: var(--color-gold);
  width: 0;
  animation: progressFill 10s linear forwards;
}

.slider-progress-bar.paused {
  animation-play-state: paused;
}

@keyframes progressFill {
  from { width: 0%; }
  to { width: 100%; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ----------------------------------------
   7. Features Bar
   ---------------------------------------- */
.features-bar {
  background: var(--color-white);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-gray-200);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border-radius: 50%;
  color: var(--color-gold);
  flex-shrink: 0;
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature-text {
  font-size: var(--text-sm);
  color: var(--color-gray-700);
  line-height: 1.4;
}

.feature-text strong {
  display: block;
  color: var(--color-black);
  font-weight: var(--font-medium);
}

/* ----------------------------------------
   8. Section Common
   ---------------------------------------- */
.section {
  padding: var(--space-20) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-eyebrow {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: var(--space-3);
  font-family: var(--font-serif-en);
}

.section-title {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: var(--font-light);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}

.section-line {
  width: 60px;
  height: 1px;
  background: var(--color-gold);
  margin: 0 auto var(--space-4);
}

.section-description {
  font-size: var(--text-base);
  color: var(--color-gray-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ----------------------------------------
   9. Best Sellers - Carousel
   ---------------------------------------- */
.bestsellers {
  background: var(--color-white);
  overflow: visible;
  position: relative;
}

.carousel {
  position: relative;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-16);
  overflow: visible;
}

.carousel-track {
  display: flex;
  gap: var(--space-6);
  overflow-x: auto;
  position: relative;
  z-index: 1;
  justify-content: center;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: var(--space-2) 0;
}

.carousel-track::-webkit-scrollbar {
  display: none;
}

.carousel-track .product-card {
  flex: 0 0 calc(25% - var(--space-6) * 3 / 4);
  min-width: 280px;
}

/* Bestseller Skeleton Card */
.carousel-track .skeleton-card {
  flex: 0 0 calc(25% - var(--space-6) * 3 / 4);
  min-width: 280px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.carousel-track .skeleton-card-image {
  aspect-ratio: 1;
  background: linear-gradient(90deg, #e8e8e8 25%, #f5f5f5 50%, #e8e8e8 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

.carousel-track .skeleton-card-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.carousel-track .skeleton-card-body .skeleton {
  background: linear-gradient(90deg, #e8e8e8 25%, #f5f5f5 50%, #e8e8e8 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

.carousel-track .skeleton--text {
  height: 14px;
}

.carousel-track .skeleton--title {
  height: 20px;
}

.carousel-track .skeleton--button {
  height: 44px;
}

/* carousel-nav - btn-outline + btn-circle を継承 */
.carousel-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(4px);
  /* btn-icon サイズ調整 */
  width: 48px;
  height: 48px;
  padding: 0;
}

.carousel-nav:hover {
  transform: translateY(-50%) scale(1.1);
  color: var(--color-black);  /* slider-prev/next と統一 */
}

.carousel-nav:active {
  transform: translateY(-50%) scale(0.95);
}

.carousel-nav--prev {
  left: -28px;
}

.carousel-nav--next {
  right: -28px;
}

.carousel-nav svg {
  width: 24px;
  height: 24px;
  stroke-width: 2.5;
}

/* Product Card */
.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.product-card-image {
  position: relative;
  aspect-ratio: 1;
  background: #fafafa;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform var(--transition-base);
}

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

.product-card-badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  z-index: 10;
  font-weight: var(--font-bold);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-card-badge--bestseller {
  background: var(--color-gold);
  color: var(--color-white);
}

.product-card-badge--new {
  background: var(--color-gold);
  color: var(--color-black);
}

.product-card-badge--sale {
  background: #c41e3a;
  color: var(--color-white);
}

.product-card-body {
  padding: var(--space-5);
}

.product-card-category {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}

.product-card-name {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  margin-bottom: var(--space-2);
  color: var(--color-black);
}

.product-card-sku {
  font-size: var(--text-xs);
  color: var(--color-gray-600);
  font-family: var(--font-mono, monospace);
  margin-bottom: var(--space-1);
  letter-spacing: 0.02em;
}

.product-card-code {
  font-size: var(--text-xs);
  color: var(--color-gray-400);
  margin-bottom: var(--space-3);
}

.product-card-specs {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-bottom: var(--space-3);
}

.product-card-price {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.product-card-price-current {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-black);
}

.product-card-price-original {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  text-decoration: line-through;
}

/* 商品カード詳細ボタン - btn-primary を継承 */
.product-card .btn-view-detail {
  margin-top: var(--space-4);
  text-decoration: none;
}

.product-card .btn-view-detail i,
.product-card .btn-view-detail svg {
  transition: transform var(--transition-base);
}

.product-card .btn-view-detail:hover i,
.product-card .btn-view-detail:hover svg {
  transform: translateX(4px);
}

.section-action {
  text-align: center;
  margin-top: var(--space-12);
}

/* ----------------------------------------
   10. Contact Section
   ---------------------------------------- */
.contact {
  background: var(--color-gray-100);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  max-width: var(--container-lg);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.contact-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.contact-card:hover {
  border-color: var(--color-gold);
  box-shadow: var(--shadow-gold);
}

.contact-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
  border-radius: 50%;
  color: var(--color-white);
}

.contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-label {
  font-size: var(--text-xs);
  color: var(--color-gold);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-3);
  font-weight: var(--font-medium);
}

.contact-value {
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--color-black);
  line-height: 1.6;
}

.contact-value a {
  color: var(--color-black);
  transition: color var(--transition-fast);
}

.contact-value a:hover {
  color: var(--color-gold);
}

.contact-note {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-2);
}

/* ----------------------------------------
   11. Responsive
   ---------------------------------------- */
@media (max-width: 1024px) {
  /* Hero Slides */
  .slide-brand-content,
  .slide-campaign-content,
  .slide-product-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-8);
  }

  .slide-brand-text {
    text-align: center;
  }

  .slide-brand-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .slide-brand-image,
  .slide-campaign-image,
  .slide-product-image {
    order: -1;
  }

  .slide-brand-image img,
  .slide-campaign-image img,
  .slide-product-image img {
    max-width: 350px;
    margin: 0 auto;
  }

  .slide-product-actions {
    justify-content: center;
  }

  /* Carousel */
  .carousel-track .product-card {
    flex: 0 0 calc(50% - var(--space-6) / 2);
  }

  .carousel-nav {
    display: none;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  /* Slider Controls */
  .slider-prev,
  .slider-next {
    display: none;
  }

  /* Features */
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .campaign {
    margin-top: 56px;
    height: auto;
    min-height: 100vh;
  }

  .slider-prev,
  .slider-next {
    width: 44px;
    height: 44px;
  }

  .slider-prev { left: var(--space-3); }
  .slider-next { right: var(--space-3); }

  .slide-brand-title {
    font-size: clamp(2.5rem, 12vw, 4rem);
  }

  .slide-campaign-title {
    font-size: clamp(1.5rem, 6vw, 2.5rem);
  }

  .slide-campaign-discount {
    font-size: clamp(2rem, 10vw, 4rem);
  }

  .slide-product-name {
    font-size: clamp(1.5rem, 6vw, 2.5rem);
  }

  .slide-product-actions {
    flex-direction: column;
    width: 100%;
  }

  .slide-product-actions .btn {
    width: 100%;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .feature-item {
    flex-direction: column;
    text-align: center;
  }

  .carousel-track .product-card {
    flex: 0 0 85%;
  }
}