/* ============================================
   Childindex Page Styles
   チャイルドシートコーナー
   ============================================ */

/* ============================================
   Childseat Accordion Styles
   ============================================ */
   .childseat-accordion {
    display: flex;
    flex-direction: column;
    gap: 0;
  }
  
  .childseat-accordion-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md, 1rem);
    overflow: hidden;
    background: var(--color-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: box-shadow 0.2s ease;
  }
  
  .childseat-accordion-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }
  
  .childseat-accordion-item.active {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  }
  
  .childseat-accordion-header {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg, 1.5rem) var(--spacing-xl, 2rem);
    background: linear-gradient(135deg, var(--color-yellow-25) 0%, var(--color-white) 100%);
    border: none;
    text-align: left;
    cursor: pointer;
    font-size: var(--font-size-responsive-lg, 1.25rem);
    font-weight: var(--font-weight-bold, 700);
    color: var(--color-yellow-900);
    font-family: "Noto Sans JP", "Yu Gothic UI", system-ui, sans-serif;
    transition: background 0.2s ease;
    gap: var(--spacing-md, 1rem);
  }
  
  .childseat-accordion-header:hover {
    background: linear-gradient(135deg, var(--color-yellow-50) 0%, var(--color-yellow-25) 100%);
  }
  
  .childseat-accordion-header:focus {
    outline: var(--focus-width) solid var(--color-brand);
    outline-offset: calc(var(--focus-width) * -1);
  }
  
  .childseat-accordion-header-text {
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    gap: var(--spacing-md, 1rem);
  }
  
  .childseat-accordion-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    background: var(--color-brand);
    color: var(--color-yellow-900);
    border-radius: 50%;
    font-size: 1rem;
    flex-shrink: 0;
  }

  .childseat-accordion-header-text-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md, 0.25rem);
  }
  
  .childseat-accordion-header-text-content-sub {
    font-size: var(--font-size-responsive-lg, 1rem);
    font-weight: var(--font-weight-regular, 400);
    color: var(--color-yellow-900);
  }
  
  .childseat-accordion-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    color: var(--color-yellow-900);
    flex-shrink: 0;
    transition: transform 0.3s ease;
  }
  
  .childseat-accordion-toggle svg {
    width: 1.5rem;
    height: 1.5rem;
    stroke-width: 2;
  }
  
  .childseat-accordion-item.active .childseat-accordion-toggle {
    transform: rotate(180deg);
  }
  
  .childseat-accordion-content {
    display: none;
    padding: var(--spacing-xl, 2rem);
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
    animation: childseat-slideDown 0.3s ease;
  }
  
  .childseat-accordion-item.active .childseat-accordion-content {
    display: block;
  }
  
  @keyframes childseat-slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* Child Seat Section Title */
  .childseat-section-title {
    font-size: var(--font-size-responsive-lg, 1.25rem);
    font-weight: var(--font-weight-bold, 700);
    color: var(--color-yellow-900);
    padding-left: var(--space-2);
    border-left: 4px solid var(--color-brand);
    margin-top: 0;
    margin-bottom: var(--space-4);
    line-height: var(--line-height-tight, 1.4);
  }
  
  /* Child Seat Subsection Title */
  .childseat-subsection-title {
    font-size: var(--font-size-responsive-base, 1rem);
    font-weight: var(--font-weight-bold, 700);
    color: var(--color-yellow-900);
    margin-top: 0;
    margin-bottom: var(--space-2);
    line-height: var(--line-height-tight, 1.4);
  }
  
  /* Form Button Container */
  .childseat-form-button-container {
    margin-top: var(--spacing-lg);
    display: flex;
    justify-content: center;
  }
  
  .childseat-btn-form-link {
    display: inline-block;
    transition: opacity var(--transition-base, 0.2s);
  }
  
  .childseat-btn-form-link:hover {
    opacity: 0.8;
  }
  
  .childseat-btn-form-link img {
    max-width: 200px;
    height: auto;
  }
  
  /* YouTube Intro Text */
  .childseat-youtube-intro-text {
    font-size: var(--font-size-responsive-base, 1rem);
    color: var(--color-text);
    margin-bottom: var(--spacing-lg, 1.5rem);
    line-height: var(--line-height-relaxed, 1.75);
  }
  
  /* YouTube Videos Grid */
  .childseat-youtube-videos-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg, 1.5rem);
    margin: var(--spacing-xl, 2rem) 0;
  }
  
  .childseat-youtube-video-item {
    text-align: center;
  }
  
  .childseat-youtube-video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--radius-md, 4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }
  
  .childseat-youtube-video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
  }
  
  .childseat-video-caption {
    margin-top: var(--spacing-sm, 0.5rem);
    font-size: var(--font-size-responsive-sm, 0.9375rem);
    font-weight: var(--font-weight-bold, 700);
    color: var(--color-text);
  }
  
  @media (max-width: 992px) {
    .childseat-youtube-videos-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (max-width: 576px) {
    .childseat-youtube-videos-grid {
      grid-template-columns: 1fr;
    }
  }
  
  /* E-mark Section Layout */
  .childseat-emark-intro-text {
    color: #d00;
    font-weight: var(--font-weight-bold, 700);
    margin-bottom: var(--spacing-xl, 2rem);
    line-height: var(--line-height-relaxed, 1.75);
  }
  
  .childseat-emark-section-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl, 2rem);
    margin-bottom: var(--spacing-xl, 2rem);
    padding: var(--spacing-lg, 1.5rem);
    background: var(--color-bg-light);
    border-radius: var(--radius-md, 4px);
  }
  
  .childseat-emark-diagram-container {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .childseat-emark-diagram-title {
    font-size: var(--font-size-responsive-lg, 1.25rem);
    font-weight: var(--font-weight-bold, 700);
    color: var(--color-text);
    margin-bottom: var(--spacing-lg, 1.5rem);
    line-height: var(--line-height-tight, 1.4);
  }
  
  .childseat-emark-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .childseat-emark-diagram img {
    max-width: 100%;
    height: auto;
  }
  
  .childseat-emark-labels {
    font-size: var(--font-size-responsive-sm, 0.9375rem);
    line-height: var(--line-height-relaxed, 1.75);
  }
  
  .childseat-emark-labels p {
    margin-bottom: var(--spacing-sm, 0.5rem);
  }
  
  .childseat-emark-types-container {
    text-align: left;
  }
  
  .childseat-emark-types-title {
    font-size: var(--font-size-responsive-lg, 1.25rem);
    font-weight: var(--font-weight-bold, 700);
    color: var(--color-text);
    margin-bottom: var(--spacing-lg, 1.5rem);
    line-height: var(--line-height-tight, 1.4);
  }
  
  .childseat-emark-types-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  
  .childseat-emark-types-list li {
    margin-bottom: var(--spacing-md, 1rem);
    line-height: var(--line-height-relaxed, 1.75);
  }
  
  .childseat-emark-types-list .childseat-type-jp {
    display: block;
    font-size: var(--font-size-responsive-base, 1rem);
    color: var(--color-text);
  }
  
  .childseat-emark-types-list .childseat-type-en {
    display: block;
    font-size: var(--font-size-responsive-sm, 0.9375rem);
    color: var(--color-text-muted);
  }
  
  @media (max-width: 768px) {
    .childseat-emark-section-grid {
      grid-template-columns: 1fr;
    }
  
    .childseat-emark-diagram-container {
      text-align: center;
    }
  
    .childseat-emark-types-container {
      margin-top: var(--spacing-lg, 1.5rem);
    }
  
    .childseat-accordion-header {
      padding: var(--spacing-md, 1rem) var(--spacing-lg, 1.5rem);
      font-size: var(--font-size-responsive-base, 1rem);
    }
  
    .childseat-accordion-content {
      padding: var(--spacing-lg, 1.5rem);
    }
  
    .childseat-accordion-icon {
      width: 1.5rem;
      height: 1.5rem;
      font-size: 0.875rem;
    }

    .childseat-accordion-header-text-content-sub {
      font-size: var(--font-size-responsive-base, 0.75rem);
    }
  }
  
  /* Child Seat Table */
  .childseat-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-responsive-base, 1rem);
    background: var(--color-bg);
    margin-bottom: var(--spacing-xl);
  }
  
  .childseat-table thead {
    background: var(--color-bg-table);
  }
  
  .childseat-table th {
    padding: var(--spacing-md) var(--spacing-base);
    text-align: left;
    font-weight: var(--font-weight-bold, 700);
    font-size: var(--font-size-responsive-sm, 0.9375rem);
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
  }
  
  .childseat-table td {
    padding: var(--spacing-md) var(--spacing-base);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    vertical-align: top;
  }
  
  .childseat-table tbody tr:hover {
    background-color: var(--color-bg-hover);
  }
  
  .childseat-table .childseat-col-date {
    width: 170px;
    white-space: nowrap;
  }
  
  .childseat-table .childseat-col-product {
    width: 180px;
  }
  
  .childseat-table .childseat-col-company {
    width: 280px;
  }
  
  .childseat-table .childseat-col-detail {
    min-width: 200px;
  }
  
  /* Footnotes */
  .childseat-footnotes {
    margin-top: var(--spacing-lg, 1.5rem);
    padding: var(--spacing-md, 1rem);
    background: var(--color-bg-light);
    border-radius: var(--radius-md, 4px);
    font-size: var(--font-size-responsive-sm, 0.9375rem);
  }
  
  .childseat-footnote-item {
    color: var(--color-text-muted);
    line-height: var(--line-height-relaxed, 1.75);
  }
  
  .childseat-footnote-item:first-child {
    margin-top: 0;
  }
  
  .childseat-footnote-item:last-child {
    margin-bottom: 0;
  }
  
  /* Note Text */
  .childseat-note {
    color: var(--color-text-muted);
    font-size: var(--font-size-responsive-sm, 0.9375rem);
    margin-top: var(--spacing-md, 1rem);
  }
  
  .childseat-table .childseat-table-link {
    color: var(--color-primary);
    text-decoration: underline;
  }
  
  .childseat-table .childseat-table-link:hover {
    color: var(--color-primary-hover);
  }
  
  /* Info Text Section */
  .childseat-info-text {
    padding: var(--space-4);
    background: var(--color-bg-light);
    border-radius: var(--radius-md, 4px);
    line-height: var(--line-height-relaxed, 1.75);
  }

  .childseat-info-text p:first-child {
    margin-top: 0;
  }
  
  .childseat-info-text p:last-child {
    margin-bottom: 0;
  }
  
  .childseat-info-text a {
    color: var(--color-primary);
    text-decoration: underline;
  }
  
  .childseat-info-text a:hover {
    color: var(--color-primary-hover);
  }
  
  /* Warning Box */
  .childseat-warning-box {
    background: #FFF9E6;
    border: 2px solid var(--color-brand);
    border-radius: var(--radius-md, 4px);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
  }
  
  .childseat-warning-box h3 {
    font-size: var(--font-size-responsive-lg, 1.25rem);
    font-weight: var(--font-weight-bold, 700);
    color: var(--color-yellow-900);
    margin: 0;
  }
  
  .childseat-warning-box p {
    margin-bottom: 0;
    line-height: var(--line-height-relaxed, 1.75);
  }
  
  .childseat-warning-box ul {
    list-style: disc;
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
  }
  
  .childseat-warning-box li {
    margin-bottom: var(--spacing-sm);
  }
  
  /* E-mark Section */
  .childseat-emark-section {
    margin-top: var(--spacing-xl);
  }
  
  .childseat-emark-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
  }
  
  .childseat-emark-item {
    background: var(--color-bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md, 4px);
    text-align: center;
  }
  
  .childseat-emark-item img {
    max-width: 100px;
    height: auto;
    margin-bottom: var(--spacing-md);
  }
  
  .childseat-emark-item p {
    font-size: var(--font-size-responsive-sm, 0.9375rem);
    color: var(--color-text);
  }

  /* YouTubeアイコンを表示するための共通設定（追記） */
  .icon-youtube-inline::after {
    content: "";
    display: inline-block;
    width: 2.8rem; /* 元のコードと同じサイズ */
    height: 1.5em;
    vertical-align: top;
    background: url("../../icons/youtube.png") no-repeat center / contain;
  }