/* ========================================
   買取アイテム詳細ページ専用CSS
======================================== */

/* ========================================
   Page Hero
======================================== */
.items-hero {
  padding: 150px 0 80px;
  background: linear-gradient(135deg, #2a4d7a 0%, #3a6ea5 100%);
  text-align: center;
  margin-top: 80px;
}

.items-hero h1 {
  font-size: 2.5rem;
  color: white;
  margin-bottom: 20px;
  font-family: var(--font-serif);
}

.items-hero p {
  font-size: 1.125rem;
  color: #dfeefd;
}

/* ========================================
   Item Tabs
======================================== */
.items-tabs-section {
  padding: var(--space-10) 0;
  background: white;
}

.items-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.item-tab {
  padding: var(--space-3) var(--space-4);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text);
  background: white;
  border: 3px solid var(--color-gray);
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.item-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.item-tab.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* ========================================
   Item Detail
======================================== */
.item-detail {
  display: none;
  animation: fadeIn 0.5s ease-out;
}

.item-detail.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Item Detail Header */
.item-detail-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding: var(--space-5);
  background: var(--color-light-blue);
  border-radius: var(--radius);
  border-left: 5px solid var(--color-primary);
}

.item-detail-icon {
  width: 100px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border-radius: 50%;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.item-detail-icon img {
  width: 70px;
  height: 70px;
  object-fit: contain;
}

.item-detail-title h2 {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
  font-family: var(--font-serif);
}

.item-detail-title p {
  font-size: 1.125rem;
  color: var(--color-text);
}

/* Item Detail Grid */
.item-detail-grid {
  display: grid;
  grid-template-columns: 1fr 350px;
  gap: var(--space-6);
}

.item-detail-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* Detail Section */
.detail-section {
  padding: var(--space-5);
  background: white;
  border: 2px solid var(--color-gray);
  border-radius: var(--radius);
}

.detail-section h3 {
  font-size: 1.75rem;
  color: var(--color-dark);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 3px solid var(--color-primary);
  position: relative;
}

.detail-section h3::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
}

/* Target Items */
.target-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}

.target-item {
  padding: var(--space-2) var(--space-3);
  background: var(--color-light-blue);
  border-radius: var(--radius);
  font-weight: 600;
  color: var(--color-primary);
}

/* Brand Grid */
.brand-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}

.brand-item {
  padding: var(--space-3);
  background: var(--color-light-blue);
  border-radius: var(--radius);
  text-align: center;
  font-weight: 600;
  color: var(--color-primary);
  transition: var(--transition);
}

.brand-item:hover {
  background: var(--color-primary);
  color: white;
  transform: scale(1.05);
}

/* Point List */
.point-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.point-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-light-blue);
  border-radius: var(--radius);
  transition: var(--transition);
}

.point-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

.point-number {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: white;
  font-size: 1.25rem;
  font-weight: 900;
  border-radius: 50%;
  flex-shrink: 0;
}

.point-content h4 {
  font-size: 1.125rem;
  color: var(--color-dark);
  margin-bottom: var(--space-1);
}

.point-content p {
  color: var(--color-text);
  line-height: 1.8;
}

/* Case List */
.case-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.case-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3);
  background: var(--color-light-blue);
  border-radius: var(--radius);
  transition: var(--transition);
}

.case-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

.case-name {
  font-weight: 600;
  color: var(--color-dark);
}

.case-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  font-family: var(--font-serif);
}

/* Sidebar */
.item-detail-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.sidebar-box {
  padding: var(--space-4);
  background: var(--color-light-blue);
  border-radius: var(--radius);
  border: 2px solid var(--color-primary);
}

.sidebar-box h4 {
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  font-weight: 700;
}

.sidebar-box ul {
  list-style: none;
  padding: 0;
}

.sidebar-box li {
  padding: var(--space-2) 0;
  padding-left: var(--space-3);
  position: relative;
  color: var(--color-text);
  line-height: 1.8;
  border-bottom: 1px solid rgba(24, 42, 136, 0.1);
}

.sidebar-box li:last-child {
  border-bottom: none;
}

.sidebar-box li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 900;
}

.sidebar-cta {
  position: sticky;
  top: 120px;
}

/* ========================================
   Responsive - Tablet
======================================== */
@media (max-width: 1024px) {
  .item-detail-grid {
    grid-template-columns: 1fr;
  }

  .sidebar-cta {
    position: relative;
    top: 0;
  }

  .items-hero h1 {
    font-size: 2.5rem;
  }

  .brand-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   Responsive - Mobile
======================================== */
@media (max-width: 768px) {
  .items-hero {
    padding: 120px 0 60px;
    margin-top:60px;
  }

  .items-hero h1 {
    font-size: 2rem;
  }

  .items-tabs {
    gap: var(--space-1);
  }

  .item-tab {
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
  }

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

  .item-detail-icon {
    width: 80px;
    height: 80px;
  }

  .item-detail-icon img {
    width: 60px;
    height: 60px;
  }

  .item-detail-title h2 {
    font-size: 1.75rem;
  }

  .target-items {
    grid-template-columns: 1fr;
  }

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

  .point-item {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .point-number {
    width: 40px;
    height: 40px;
    font-size: 1rem;
    margin: 0 auto;
  }

  .case-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .case-price {
    font-size: 1.25rem;
  }

  .detail-section {
    padding: var(--space-3);
  }
}