/* 
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 96px;
    z-index: 100;
    display: flex;
    align-items: center;
    transition: background-color 0.3s ease, color 0.3s ease;
    background: linear-gradient(180deg, rgba(249, 248, 244, 0.9) 0%, rgba(249, 248, 244, 0) 100%);
    color: var(--color-text);
  }
  
  .site-header__inner {
    width: 100%;
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
  }
  
  .site-header__logo-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: "EB Garamond", serif;
    font-size: 24px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: inherit;
    text-decoration: none;
  }
  
  .site-header__controls {
    display: flex;
    align-items: center;
    gap: 32px;
  }
  
  .site-header__nav-list {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
    margin: 0;
    padding: 0;
    font-family: "游明朝体", "Yu Mincho", serif;
    font-size: 16px;
  }
  
  .site-header__nav-list li {
    list-style: none;
  }
  
  .site-header__nav-list li a {
    color: inherit;
    text-decoration: none;
    position: relative;
    padding-bottom: 4px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  
  .site-header__nav-list li a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    background-color: currentColor;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.2s ease;
  }
  
  .site-header__nav-list li a:hover::after,
  .site-header__nav-list li a:focus-visible::after {
    transform: scaleX(1);
  }
  
  .site-header__actions {
    display: flex;
    align-items: center;
    gap: 20px;
  }
  
  .language-dropdown {
    position: relative;
  }
  
  .language-dropdown > summary {
    list-style: none;
  }
  
  .language-dropdown__trigger {
    cursor: pointer;
    font-family: "游明朝体", "Yu Mincho", serif;
    font-size: 14px;
    border: 1px solid currentColor;
    border-radius: 999px;
    padding: 8px 16px;
    background: transparent;
    transition: background-color 0.2s ease, color 0.2s ease;
  }
  
  .language-dropdown__trigger::-webkit-details-marker {
    display: none;
  }
  
  .language-dropdown[open] .language-dropdown__trigger {
    background-color: currentColor;
    color: var(--color-bg);
  }
  
  .language-dropdown__list {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background-color: rgba(249, 248, 244, 0.95);
    border: 1px solid rgba(60, 74, 62, 0.2);
    border-radius: 12px;
    padding: 12px 0;
    list-style: none;
    margin: 0;
    min-width: 180px;
    box-shadow: 0 10px 20px rgba(60, 74, 62, 0.12);
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  
  .language-dropdown__list a,
  .language-dropdown__list .is-current {
    display: block;
    padding: 8px 18px;
    font-size: 14px;
    color: inherit;
    text-decoration: none;
    font-family: "游明朝体", "Yu Mincho", serif;
  }
  
  .language-dropdown__list a:hover,
  .language-dropdown__list a:focus-visible {
    background-color: rgba(199, 180, 154, 0.2);
  }
  
  .language-dropdown__list .is-current {
    opacity: 0.6;
    pointer-events: none;
  }
  
  .site-header__cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 999px;
    background-color: var(--color-accent2);
    color: var(--color-text);
    font-family: "游明朝体", "Yu Mincho", serif;
    font-size: 16px;
    text-decoration: none;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  
  .site-header__cta:hover,
  .site-header__cta:focus-visible {
    transform: translateY(-2px);
    opacity: 0.85;
  }
  
  .site-header--solid {
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0) 100%);
    color: var(--color-white);
  }
  
  .site-header--solid .language-dropdown__list {
    background-color: rgba(0, 0, 0, 0.86);
    border-color: rgba(255, 255, 255, 0.12);
    color: var(--color-white);
  }
  
  .site-header--solid .site-header__cta {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.3);
  }
  
  .site-header--solid .site-header__cta:hover,
  .site-header--solid .site-header__cta:focus-visible {
    opacity: 0.9;
  } */

/* ハンバーガーメニューの×アイコンアニメーション（aria-expanded状態に応じて） */
#mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

#mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

#mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}