/* ==========================================================================
   デザイントークン(DESIGN.md: "Navy ink on cool marble" 準拠)
   クールグレーの背景に白いカード、文字は濃紺。操作色は Signal Blue のみ。
   ========================================================================== */
@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Noto+Sans+JP:wght@400;500;700&family=JetBrains+Mono:wght@400;500&display=swap");

:root{
  /* Colors */
  --color-ink-navy: #0b3558;
  --color-signal-blue: #006bff;
  --color-slate-gray: #476788;
  --color-mist-gray: #a6bbd1;
  --color-cloud: #f8f9fb;
  --color-paper: #ffffff;
  --color-pebble: #f0f3f8;
  --color-hairline: #d4e0ed;
  --color-coral-magenta: #e55cff;
  --color-sky-cyan: #0099ff;
  --color-deep-cobalt: #004eba;
  --color-badge-bg: #e6f0ff;

  /* Typography */
  --font-sans: "Manrope", "Noto Sans JP", "Hiragino Kaku Gothic ProN", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows(影は使わない。浮き上がりは枠線で表現する) */
  --shadow-card: none;
  --shadow-elevated: none;
  --shadow-button: none;

  /* Layout */
  --page-max-width: 1200px;

  /* 既存ルール用の別名(新トークンに対応づける) */
  --paper: var(--color-paper);
  --paper-raised: var(--color-paper);
  --ink: var(--color-ink-navy);
  --ink-soft: var(--color-slate-gray);
  --line: var(--color-hairline);
  --accent: var(--color-signal-blue);
  --accent-soft: var(--color-badge-bg);
  --teal: var(--color-signal-blue);
  --teal-soft: var(--color-pebble);
  --radius: var(--radius-xl);
  --shadow: var(--shadow-card);
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; scroll-padding-top: 140px; }  /* スティッキーヘッダーにページ内リンク先が隠れないようにする */

body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3{
  font-family: var(--font-sans);
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 0.5em;
}

a{ color: var(--teal); text-decoration: none; }
a:hover{ text-decoration: underline; }

.container{
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- ヘッダー(DESIGN.md: 64px のスティッキーなトップバー) ---------- */
.site-header{
  --hdr-primary: var(--color-signal-blue);
  --hdr-on-primary: #ffffff;
  --hdr-ink: var(--color-ink-navy);
  --hdr-ink-mute: var(--color-slate-gray);
  --hdr-canvas: var(--color-paper);
  --hdr-canvas-soft: var(--color-pebble);
  --hdr-hairline: var(--color-hairline);
  --hdr-radius-sm: var(--radius-md);
  --hdr-radius-md: var(--radius-md);
  --hdr-radius-lg: var(--radius-xl);
  --hdr-radius-full: var(--radius-full);
  --hdr-space-sm: 8px;
  --hdr-space-md: 12px;
  --hdr-space-lg: 16px;
  --hdr-space-xl: 24px;
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--hdr-hairline);
  background: rgba(255,255,255,.82);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  font-family: var(--font-sans);
}
.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  max-width: 1200px;
  padding-top: 14px;
  padding-bottom: 14px;
  gap: var(--hdr-space-lg);
}
.site-title{
  display:block;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.05rem, .85rem + 1vw, 1.4rem);
  letter-spacing: .02em;
  color: var(--hdr-ink);
  flex-shrink: 0;
  transition: color .2s ease;
}
.site-nav{ display:flex; align-items:center; gap: clamp(12px, 1.6vw, 24px); }
.site-nav a{
  color: var(--hdr-ink-mute);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .01em;
  white-space: nowrap;
  transition: color .2s ease;
}
.site-nav a:hover{ color: var(--hdr-ink); text-decoration:none; }
.site-nav a.is-active{ color: var(--hdr-primary); }

/* ---------- ナビのドロップダウン ---------- */
.nav-dropdown{ position:relative; }
.nav-dropdown summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  gap:4px;
  color: var(--hdr-ink-mute);
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .01em;
  white-space: nowrap;
  font-weight: 600;
  transition: color .2s ease;
}
.nav-dropdown summary::-webkit-details-marker{ display:none; }
/* 開閉を示すシェブロン(開くと上向きに回転) */
.nav-dropdown summary::after{
  content:"";
  width:6px;
  height:6px;
  margin: -3px 0 0 2px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform .2s ease, margin .2s ease;
}
.nav-dropdown[open] summary::after{ transform: rotate(-135deg); margin-top: 3px; }
.nav-dropdown summary:hover,
.nav-dropdown[open] summary{ color: var(--hdr-ink); }
.nav-dropdown.is-active summary{ color: var(--hdr-primary); }
.nav-dropdown .dropdown-menu{
  display:none;
  flex-direction:column;
  position:absolute;
  top: calc(100% + 14px);
  left:0;
  min-width:260px;
  background: var(--hdr-canvas);
  border:1px solid var(--hdr-hairline);
  border-radius: var(--hdr-radius-lg);
  box-shadow: var(--shadow-elevated);
  padding:8px;
  z-index:30;
}
.nav-dropdown[open] .dropdown-menu{
  display:flex;
  animation: dropdown-in .18s cubic-bezier(.2,.8,.2,1);
}
@keyframes dropdown-in{
  from{ opacity:0; transform: translateY(-6px) scale(.98); }
  to{ opacity:1; transform: none; }
}
@media (prefers-reduced-motion: reduce){
  .nav-dropdown[open] .dropdown-menu{ animation:none; }
}
.dropdown-menu a{
  padding:9px 12px;
  border-radius: var(--hdr-radius-sm);
  font-size:.85rem;
  font-weight: 500;
  color: var(--hdr-ink);
  white-space: nowrap;
  transition: color .15s ease;
}
.dropdown-menu a:hover{ color: var(--hdr-primary); text-decoration:none; }
.dropdown-menu a.is-active{ color: var(--hdr-primary); font-weight:700; }
.dropdown-menu a.sub{ padding:6px 12px 6px 26px; font-size:.8rem; position:relative; color: var(--hdr-ink-mute); }
.dropdown-menu a.sub::before{ content:"–"; position:absolute; left:12px; color: var(--hdr-hairline); }
.seminar-nav-items{ display:flex; flex-direction:column; }
.seminar-nav-items:not(:empty){
  margin-top:4px;
  padding-top:4px;
  border-top:1px solid var(--hdr-hairline);
}
.seminar-nav-items .seminar-nav-link{
  display:flex;
  flex-direction:column;
  gap:2px;
  align-items:flex-start;
  white-space:normal;
  line-height:1.35;
  max-width:320px;
}
.seminar-nav-items .seminar-nav-date{
  font-family: var(--font-mono);
  font-size:.7rem;
  font-weight:500;
  color: var(--hdr-ink-mute);
  letter-spacing:.02em;
}
.seminar-nav-items .seminar-nav-title{
  font-size:.85rem;
  font-weight:500;
  color:inherit;
}
.seminar-nav-items .seminar-nav-link:hover .seminar-nav-date{
  color: var(--hdr-primary);
}

/* ---------- 日英切り替え(pill-tab-light 準拠) ---------- */
.lang-switch{
  display:flex;
  align-items:center;
  gap:2px;
  font-family: var(--font-sans);
  font-size:.75rem;
  background: var(--hdr-canvas-soft);
  border:1px solid var(--hdr-hairline);
  border-radius: var(--hdr-radius-full);
  padding:3px;
  flex-shrink: 0;
  margin-left: auto;   /* タイトル行の右端(ハンバーガーの左)に寄せる */
}
.lang-switch button{
  border:none;
  background:none;
  color: var(--hdr-ink-mute);
  padding:4px 10px;
  border-radius: var(--hdr-radius-full);
  cursor:pointer;
  font-family:inherit;
  font-size:inherit;
  font-weight:600;
  letter-spacing:.06em;
  transition: background-color .2s ease, color .2s ease, box-shadow .2s ease;
}
.lang-switch button:hover{ color: var(--hdr-ink); }
.lang-switch button.is-active{
  background: var(--hdr-primary);
  color: var(--hdr-on-primary);
  font-weight:700;
  box-shadow: var(--shadow-button);
}

/* ---------- ハンバーガーメニュー(1024px未満) ---------- */
.nav-toggle{
  display:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  border:none;
  background:none;
  cursor:pointer;
  padding:0;
  flex-shrink:0;
}
.nav-toggle span{
  display:block;
  width:22px;
  height:2px;
  background: var(--hdr-ink);
  border-radius: var(--hdr-radius-full);
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle span + span{ margin-top:5px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 1023px){
  .nav-toggle{ display:flex; }
  .site-nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    max-height: calc(100vh - 100%);
    max-height: calc(100dvh - 100%);
    overflow-y: auto;
    background: var(--hdr-canvas);
    border-bottom:1px solid var(--hdr-hairline);
    box-shadow: var(--shadow-elevated);
    padding: var(--hdr-space-md) var(--hdr-space-xl) var(--hdr-space-xl);
    z-index:40;
  }
  .site-nav.is-open{ display:flex; animation: dropdown-in .2s cubic-bezier(.2,.8,.2,1); }
  .nav-dropdown[open] .dropdown-menu{ animation:none; }
  .site-nav a,
  .nav-dropdown summary{
    width:100%;
    padding: var(--hdr-space-md) 0;
    border-bottom:1px solid var(--hdr-hairline);
    white-space: normal;
  }
  .nav-dropdown{ width:100%; }
  .nav-dropdown .dropdown-menu{
    position:static;
    box-shadow:none;
    border:none;
    background:none;
    padding:0 0 var(--hdr-space-sm) var(--hdr-space-md);
    min-width:0;
  }
  .nav-dropdown summary{ justify-content: space-between; }
}

/* スマホ幅:タイトル行に JA/EN とハンバーガーを並べるため、余白を詰めてタイトルの折り返しを許可する */
@media (max-width: 640px){
  .site-header .container{ gap: var(--hdr-space-sm); }
  .site-title{ flex-shrink: 1; min-width: 0; word-break: keep-all; overflow-wrap: anywhere; }
  .lang-switch button{ padding: 4px 8px; }
}

.lang-hidden{ display:none !important; }

/* Google Translateウィジェットの純正UIを無効化する */
.skiptranslate{ display:none !important; }
body{ top:0px !important; }
.goog-text-highlight{ background:none !important; box-shadow:none !important; }

/* ---------- ヒーロー ---------- */
.hero{
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--line);
}
.hero p.lead{
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 40em;
}

/* ---------- ヒーロー(画像あり・トップページ用) ---------- */
.hero-with-media{
  padding: clamp(48px, 7vw, 96px) 0 clamp(48px, 6vw, 80px);
  border-bottom: none;
}
.hero-with-media .container{
  display:grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items:center;
}
.hero-with-media .hero-text h1{ margin-bottom: 20px; }
.hero-media{ position: relative; }
.hero-media img{
  position: relative;
  z-index: 1;
  width:100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-elevated);
  display:block;
}
.hero-media .video-frame{
  width: 100%;
  max-width: none;
  border: 1px solid var(--line);
}
/* 読み込み時に文章と写真をふわっと表示する */
.hero-with-media .hero-text,
.hero-with-media .hero-media{ animation: rise-in .7s cubic-bezier(.2,.8,.2,1) both; }
.hero-with-media .hero-media{ animation-delay: .12s; }
@keyframes rise-in{
  from{ opacity:0; transform: translateY(16px); }
  to{ opacity:1; transform: none; }
}
@media (max-width: 760px){
  .hero-with-media .container{ grid-template-columns: 1fr; }
  .hero-media{ order:-1; margin-bottom: 8px; }
}

/* ---------- セクション見出し ---------- */
.section{ padding: clamp(48px, 6vw, 72px) 0; }
.section-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap: 16px;
  margin-bottom: 28px;
}
.section-head h2{
  font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: -.01em;
  margin: 0;
}
.section-head .more{
  display:inline-flex;
  align-items:center;
  gap: 6px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}
.section-head .more:hover{ color: var(--accent); text-decoration:none; }

/* スクロールで各セクションをふわっと表示(対応ブラウザのみ・JS 不要) */
@supports (animation-timeline: view()){
  @media (prefers-reduced-motion: no-preference){
    .section > .container{
      animation: rise-in linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 30%;
    }
  }
}
@media (prefers-reduced-motion: reduce){
  .hero-with-media .hero-text,
  .hero-with-media .hero-media{ animation: none; }
}

/* ---------- お知らせ(カード型リスト) ---------- */
#news-list{ display:grid; gap: 12px; }
.news-item{
  position: relative;
  display:flex;
  gap: 20px;
  padding: 20px 24px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  align-items:flex-start;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.news-item:hover{
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: var(--shadow-elevated);
}
.news-thumb{
  width: 96px;
  height: 96px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  background: var(--teal-soft);
  flex-shrink:0;
}
.news-item time{
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 500;
  color: var(--ink-soft);
  padding-top: 3px;
  width: 92px;
  flex-shrink:0;
}
.news-item > div:last-child{ flex:1; min-width:0; }
.news-item h3{ font-size: 1.05rem; line-height: 1.55; margin-bottom: 6px; }
.news-item p{
  margin:0;
  color: var(--ink-soft);
  font-size: .9rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-item .tag{
  display:inline-block;
  font-size: .72rem;
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  padding: 2px 10px;
  margin-bottom: 8px;
}
.news-item h3 a{ color: inherit; transition: color .2s ease; }
.news-item h3 a:hover{ text-decoration: none; }
.news-item:hover h3 a{ color: var(--accent); }
/* カード全体をクリック可能にする */
.news-item h3 a::after{ content:""; position:absolute; inset:0; border-radius: inherit; }
.read-more{
  display:inline-block;
  margin-top: 8px;
  font-size: .82rem;
  color: var(--teal);
  border-bottom: 1px solid var(--teal);
}

/* ---------- 個別ページ(お知らせ詳細・固定ページ本文) ---------- */
.container-narrow{ max-width: 720px; }
.detail-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: .84rem;
  color: var(--ink-soft);
  margin-bottom: 12px;
}
.detail-meta .tag{
  font-family: var(--font-sans);
  font-size: .72rem;
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  padding: 2px 10px;
}
#news-detail > h1{
  font-size: clamp(1.6rem, 1.1rem + 1.8vw, 2.4rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -.01em;
  margin-bottom: 32px;
}
.detail-image{
  width:100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-elevated);
  margin: 20px 0;
  display:block;
}
.detail-body p{ margin: 0 0 1.2em; font-size: 1rem; }
.detail-body ul,
.detail-body ol{
  margin: 0 0 1.2em;
  padding-left: 1.4em;
}
.detail-body li{ margin-bottom: .4em; }
.detail-body img{
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  margin: 1.2em 0;
  display: block;
  box-shadow: var(--shadow);
}
.detail-body a{
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: text-decoration-color .2s ease;
}
.detail-body a:hover{ text-decoration-color: currentColor; }
/* 一覧に戻る: 枠線付きのゴーストボタン */
.detail-back{
  display:inline-flex;
  align-items:center;
  gap: 6px;
  margin-top: 40px;
  padding: 10px 18px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color .2s ease, box-shadow .2s ease, color .2s ease;
}
.detail-back:hover{ color: var(--accent); border-color: var(--accent); box-shadow: var(--shadow-button); text-decoration:none; }
/* Primary CTA(DESIGN.md) */
.btn-apply{
  display:inline-block;
  margin: 22px 0 4px;
  padding: 12px 24px;
  background: var(--color-signal-blue);
  color:#fff;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight:600;
  box-shadow: var(--shadow-button);
  transition: background-color .2s ease, transform .2s ease;
}
.btn-apply:hover{ background: var(--color-deep-cobalt); transform: translateY(-1px); text-decoration:none; }

/* ---------- 空データ ---------- */
.empty-state{
  color: var(--ink-soft);
  font-size: .9rem;
  background: var(--paper-raised);
  border: 1px dashed var(--line);
  border-radius: var(--radius-xl);
  padding: 24px;
  text-align:center;
}

/* ---------- フッター ---------- */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 56px 0 32px;
  background: var(--color-paper);
  color: var(--ink-soft);
  font-size: .85rem;
  line-height: 1.7;
}

@media (max-width: 640px){
  .news-item{ flex-direction:column; gap: 6px; padding: 18px 20px; }
  .news-thumb{ width:100%; height:160px; }
  .news-item time{ width:auto; }
}

/* ==========================================================================
   WordPress 移行コンテンツ用
   ========================================================================== */

.container{ max-width: var(--page-max-width); }
.container-narrow{ max-width: 800px; }
/* 固定ページの本文は読みやすい幅に抑える(左端は見出しと揃える) */
.page-section .page-body{ max-width: 920px; }

/* ---------- ヘッダー:サイト名の下にメニューを1行で並べる(1024px以上) ----------
   1行に収まらないとき(狭い画面・英訳時)は js/nav-toggle.js の fitNav() が
   --nav-fs を小さくして文字サイズを調整する */
a.site-title:hover{ text-decoration:none; color: var(--hdr-primary); }
@media (min-width: 1024px){
  .site-header .container{ flex-wrap: wrap; padding-bottom: 0; }
  .site-nav{
    width:100%;
    justify-content: space-between;
    gap: .85em;
    padding: 4px 0 14px;
    font-size: var(--nav-fs, .875rem);
  }
  .site-nav > a, .nav-dropdown summary{ font-size: 1em; padding-bottom: 4px; }
  /* hover で左から伸びる下線、現在地は青い下線を常に表示 */
  .site-nav > a, .nav-dropdown summary{
    background: linear-gradient(currentColor, currentColor) left bottom / 0 2px no-repeat;
    transition: color .2s ease, background-size .25s cubic-bezier(.2,.8,.2,1);
  }
  .site-nav > a:hover, .nav-dropdown summary:hover{ background-size: 100% 2px; }
  .site-nav > a.is-active, .nav-dropdown.is-active summary{ background-size: 100% 2px; }
  /* ナビ項目とメニューの間の隙間でも hover が途切れないようにする */
  .nav-dropdown .dropdown-menu::before{ content:""; position:absolute; left:0; right:0; top:-16px; height:16px; }
  /* 右端付近のドロップダウンは右揃えで開く */
  .site-nav > .nav-dropdown:nth-last-of-type(-n+2) .dropdown-menu{ left:auto; right:0; }
}
.dropdown-menu a{ white-space: normal; max-width: 340px; line-height: 1.5; }

/* ---------- 固定ページの見出し・パンくず ---------- */
.page-hero{
  padding: clamp(40px, 5vw, 64px) 0 clamp(32px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background: var(--paper-raised);
}
.page-hero h1{
  font-size: clamp(1.75rem, 1.2rem + 2vw, 2.75rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  margin: 0;
}
.breadcrumb{
  font-size: .8rem;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 16px;
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap: 4px;
}
.breadcrumb a{ color: var(--ink-soft); transition: color .2s ease; }
.breadcrumb a:hover{ color: var(--accent); text-decoration:none; }
.breadcrumb .sep{ margin: 0 4px; color: var(--color-mist-gray); }
.page-section .container > .breadcrumb{ margin-bottom: 20px; }

/* ---------- 下層ページ一覧 ---------- */
.child-pages{ margin-top: 56px; }
.child-pages h2{ font-size: clamp(1.25rem, 1rem + .8vw, 1.6rem); margin-bottom: 16px; }
.child-pages ul{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
/* 矢印付きリンクカード */
.child-pages li a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
  height: 100%;
  padding: 16px 20px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  color: var(--ink);
  font-weight: 600;
  line-height: 1.5;
  transition: border-color .2s ease, box-shadow .2s ease, color .2s ease, transform .2s ease;
}
.child-pages li a::after{ content:"→"; color: var(--accent); flex-shrink:0; transition: transform .2s ease; }
.child-pages li a:hover{ color: var(--accent); border-color: var(--accent); box-shadow: var(--shadow-elevated); transform: translateY(-2px); text-decoration:none; }
.child-pages li a:hover::after{ transform: translateX(3px); }

/* ---------- 本文(WordPress のクラス) ---------- */
/* 本文が空白文字だけのときも空とみなす(:empty は空白文字があると一致しない) */
.page-body:empty,
.page-body:not(:has(*)){ display:none; }
.page-body:empty + .child-pages,
.page-body:not(:has(*)) + .child-pages{ margin-top: 0; }
.detail-body::after{ content:""; display:table; clear:both; }
.detail-body h2{
  font-size: clamp(1.35rem, 1.1rem + .9vw, 1.75rem);
  line-height: 1.4;
  letter-spacing: -.005em;
  margin: 2em 0 .8em;
  padding-bottom: .45em;
  border-bottom: 1px solid var(--line);
}
.detail-body h3{
  position: relative;
  font-size: 1.2rem;
  line-height: 1.5;
  margin: 1.8em 0 .7em;
  padding-left: .8em;
}
/* h3 の左に丸みのある青いバー */
.detail-body h3::before{
  content:"";
  position:absolute;
  left:0; top: .2em; bottom: .2em;
  width: 4px;
  border-radius: var(--radius-full);
  background: var(--accent);
}
.detail-body h4{ font-size: 1rem; margin: 1.4em 0 .5em; }
.detail-body > :first-child{ margin-top: 0; }
.detail-body img{ display:inline-block; margin: .4em 0; box-shadow:none; border-radius: var(--radius-lg); }
.detail-body figure{ margin: 1.2em 0; }
.detail-body figcaption,
.detail-body .wp-caption-text{ font-size: .82rem; color: var(--ink-soft); margin-top: .3em; }
.detail-body .wp-caption{ max-width:100%; }
.detail-body .alignleft{ float:left; margin: .3em 1.5em 1em 0; }
.detail-body .alignright{ float:right; margin: .3em 0 1em 1.5em; }
.detail-body .aligncenter{ display:block; margin-left:auto; margin-right:auto; text-align:center; }
.detail-body .wp-block-image{ margin: 1.2em 0; }
.detail-body .wp-block-image.aligncenter img{ margin-inline:auto; }
.detail-body .wp-block-gallery,
.detail-body .gallery{ display:grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.detail-body .gallery-item, .detail-body .gallery figure{ margin:0; }
.detail-body iframe{ max-width:100%; border:0; }
.detail-body hr{ border:0; border-top:1px solid var(--line); margin: 2em 0; }
.detail-body .alert{
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  color: var(--ink);
  margin: 0 0 1.4em;
}
/* 問い合わせ欄: 筑波大学ロゴを住所の左に置く */
.contact-address{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 28px;
}
.univ-logo{
  display: block;
  flex: 0 0 220px;
  max-width: 100%;
  line-height: 0;
  text-decoration: none;
}
.univ-logo:hover{ text-decoration: none; }
.univ-logo img{
  display: block;
  width: 100%;
  height: auto;
  margin: 0;
  border-radius: 0;
}
.contact-address-text{ flex: 1 1 16rem; min-width: 0; }
@media (max-width: 640px){
  .detail-body .alignleft, .detail-body .alignright{ float:none; margin: 1em 0; }
}

/* ---------- 表 ---------- */
/* 外枠は .table-scroll の角丸ボーダー、表は内側の罫線だけを持つ */
.table-scroll{
  overflow-x:auto;
  margin: 0 0 1.4em;
  -webkit-overflow-scrolling: touch;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.detail-body table{
  border-collapse: collapse;
  width: 100%;
  font-size: .9rem;
  background: var(--paper-raised);
}
.detail-body th, .detail-body td{
  border: 1px solid var(--line);
  padding: 10px 14px;
  vertical-align: top;
  text-align: left;
}
.table-scroll tr > :first-child{ border-left: 0; }
.table-scroll tr > :last-child{ border-right: 0; }
.table-scroll table > :first-child > tr:first-child > *{ border-top: 0; }
.table-scroll table > :last-child > tr:last-child > *{ border-bottom: 0; }
.detail-body th{ font-weight: 600; }
.detail-body thead th{ background: var(--color-pebble); color: var(--ink); }
.detail-body .tablepress tbody tr:nth-child(even){ background: var(--color-cloud); }
.detail-body tbody tr{ transition: background-color .15s ease; }
.detail-body tbody tr:hover{ background: var(--color-pebble); }

/* ---------- トップページ ---------- */
.hero-with-media h1{
  font-size: clamp(1.75rem, 1.1rem + 2.4vw, 2.9rem);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -.01em;
}
.hero-with-media .hero-media img{ aspect-ratio: 16 / 10; }
.hero-with-media .hero-media .video-frame{ aspect-ratio: 16 / 9; }
/* トップ: 左お知らせ / 右案内リンク */
.home-split{
  display: grid;
  /* ご案内は短文のため狭め、お知らせに幅を寄せる */
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.75fr);
  gap: clamp(32px, 4vw, 56px);
  align-items: start;
}
.home-split-news .section-head,
.home-split-links .section-head{ margin-bottom: 12px; }
.home-split-news #news-list{
  gap: 0;
  border-top: 1px solid var(--line);
}
/* トップのお知らせはカードではなく区切り線リストにして右カラムと揃える */
.home-split-news .news-item,
.home-split-news .news-item-compact{
  min-height: 72px;
  padding: 20px 4px;
  gap: 16px;
  align-items: center;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  box-shadow: none;
}
.home-split-news .news-item:hover,
.home-split-news .news-item-compact:hover{
  transform: none;
  border-color: transparent;
  border-bottom-color: var(--accent);
}
.home-split-news .news-item h3,
.home-split-news .news-item-compact h3{
  font-size: 1rem;
  margin-bottom: 0;
  line-height: 1.45;
}
.home-split-news .news-item p{ display: none; }
.home-split-news .news-item time,
.home-split-news .news-item-compact time{
  width: 92px;
  font-size: .75rem;
  padding-top: 0;
}

/* トップ案内リンク(KEK 風の縦テキスト一覧。番号・画像なし) */
.intro-links{
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}
.intro-link{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease;
}
.intro-link:hover,
.intro-link:focus-visible{
  color: var(--accent);
  text-decoration: none;
  border-bottom-color: var(--accent);
}
.intro-link-text{
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.intro-link-title{
  font-size: clamp(1.05rem, 0.95rem + 0.45vw, 1.3rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: .01em;
}
.intro-link-desc{
  font-size: 0.9rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--ink-soft);
}
.intro-link:hover .intro-link-desc,
.intro-link:focus-visible .intro-link-desc{ color: var(--accent); }
.intro-link-arrow{
  flex-shrink: 0;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent);
  transition: transform .2s ease;
}
.intro-link:hover .intro-link-arrow,
.intro-link:focus-visible .intro-link-arrow{ transform: translateX(4px); }

@media (max-width: 900px){
  .home-split{ grid-template-columns: 1fr; gap: 40px; }
}
.video-frame{
  position:relative;
  aspect-ratio: 16 / 9;
  max-width: 880px;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  background: var(--color-ink-navy);
  box-shadow: var(--shadow-elevated);
}
.video-frame iframe{ position:absolute; inset:0; width:100%; height:100%; border:0; }

/* ---------- フッター ---------- */
/* DESIGN.md: 列見出しは 12px/600 の大文字、リンクは 14px/500 の濃紺 */
.footer-grid{
  display:grid;
  grid-template-columns: minmax(0, 2fr) repeat(2, minmax(0, 1fr));
  gap: 40px;
}
.footer-logo{
  display: block;
  width: 220px;
  max-width: 100%;
  margin: 0 0 16px;
  line-height: 0;
}
.footer-logo:hover{ text-decoration: none; }
.footer-logo img{ display: block; width: 100%; height: auto; }
.footer-name{ font-family: var(--font-sans); font-weight: 700; font-size: 1.05rem; color: var(--ink); margin-bottom: 4px; }
.footer-en{ font-size: .78rem; font-weight: 500; color: var(--color-mist-gray); margin-bottom: 16px !important; }
.site-footer p{ margin: 0; }
.footer-heading{
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 14px !important;
}
.footer-links{ list-style:none; margin:0; padding:0; display:grid; gap: 10px; }
.footer-links a{
  color: var(--ink);
  font-size: .875rem;
  font-weight: 500;
  background: linear-gradient(currentColor, currentColor) left bottom / 0 1px no-repeat;
  transition: color .2s ease, background-size .25s cubic-bezier(.2,.8,.2,1);
}
.footer-links a:hover{ color: var(--accent); background-size: 100% 1px; text-decoration:none; }
.footer-copy{
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: .75rem;
  color: var(--ink-soft);
}
@media (max-width: 760px){
  .footer-grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 24px; }
  .footer-brand{ grid-column: 1 / -1; }
}

/* ==========================================================================
   沿革(about/history.html)
   上部の年表ルーラー + 中央線の縦タイムライン(PC は左右交互、スマホは1列)
   ========================================================================== */
.history{ --span: 43; }  /* ルーラーの年数(1973〜2016)。--x / --from / --to は 1973 からの年数 */

/* ---------- 年表ルーラー ---------- */
.history-ruler{
  margin: 0 0 72px;
  padding: 44px 32px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-2xl);
}
.history-ruler-track,
.history-ruler-ticks{ position: relative; }
.history-ruler-track{ height: 24px; }
.history-ruler-track::before{
  content:"";
  position:absolute; left:0; right:0; top: 50%;
  height: 1px;
  background: var(--line);
}
/* 時代の区間(太線)と番号 */
.history-ruler-era{
  position:absolute; top: calc(50% - 2px);
  left: calc(var(--from) / var(--span) * 100%);
  width: calc((var(--to) - var(--from)) / var(--span) * 100%);
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--ink);
}
.history-ruler-era::before{
  content: attr(data-era);
  position:absolute; left: 50%; bottom: 14px;
  transform: translateX(-50%);
  font: 600 .72rem/1 var(--font-mono);
  letter-spacing: .06em;
  color: var(--ink-soft);
}
/* 出来事の点(クリックで該当年へ) */
.history-ruler-dot{
  position:absolute; top: 50%;
  left: calc(var(--x) / var(--span) * 100%);
  width: 10px; height: 10px;
  margin: -5px 0 0 -5px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: var(--paper);
  transition: transform .2s ease;
}
.history-ruler-dot.is-milestone{ background: var(--accent); }
.history-ruler-dot:hover,
.history-ruler-dot:focus-visible{ transform: scale(1.5); z-index: 1; }
/* hover 時に年を表示 */
.history-ruler-dot::after{
  content: attr(data-year);
  position:absolute; left: 50%; top: 14px;
  transform: translateX(-50%) scale(.667);  /* 親の scale(1.5) を打ち消す */
  padding: 2px 6px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--paper);
  font: 500 .75rem/1.4 var(--font-mono);
  color: var(--accent);
  opacity: 0;
  pointer-events: none;
  transition: opacity .15s ease;
}
.history-ruler-dot:hover::after,
.history-ruler-dot:focus-visible::after{ opacity: 1; }
/* 年の目盛り */
.history-ruler-ticks{ height: 1.6em; margin-top: 10px; }
.history-ruler-ticks span{
  position:absolute;
  left: calc(var(--x) / var(--span) * 100%);
  transform: translateX(-50%);
  font: 400 .75rem/1 var(--font-mono);
  color: var(--color-mist-gray);
}
.history-ruler-ticks span:first-child{ transform: none; }
.history-ruler-ticks span:last-child{ transform: translateX(-100%); }

/* ---------- 縦タイムライン ---------- */
.history-timeline{
  --axis: 50%;  /* 縦線の位置 */
  --dot: 14px;
  position: relative;
  padding-bottom: 8px;
}
.history-timeline::before{
  content:"";
  position:absolute; top: 0; bottom: 0;
  left: var(--axis);
  width: 1px;
  background: var(--line);
}
/* 縦線の終端 */
.history-timeline::after{
  content:"";
  position:absolute; bottom: 0;
  left: var(--axis);
  width: 9px; height: 9px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--line);
}
.history-era + .history-era{ margin-top: 56px; }

/* 時代の見出し(縦線の上に白地で載せる) */
.history-era-head{
  position: relative;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 40px;
  padding: 12px 8px;
  background: var(--paper);
  text-align: center;
}
.history-era-num{
  display: inline-grid;
  place-items: center;
  min-width: 44px; height: 44px;
  padding: 0 10px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-full);
  font: 600 .9rem/1 var(--font-mono);
  color: var(--ink);
}
.detail-body .history-era-head h2{
  margin: 14px 0 4px;
  padding: 0;
  border: 0;
  font-size: clamp(1.25rem, 1.05rem + .8vw, 1.6rem);
}
.detail-body .history-era-range{
  margin: 0;
  font: 500 .85rem/1.4 var(--font-mono);
  letter-spacing: .04em;
  color: var(--ink-soft);
}

/* 各出来事:[年 | 点 | カード] を左右交互に配置 */
.detail-body .history-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 32px;
}
.detail-body .history-item{
  display: grid;
  grid-template-columns: 1fr 64px 1fr;
  align-items: start;
  margin: 0;
}
.history-dot{
  grid-column: 2;
  grid-row: 1;
  justify-self: center;
  position: relative;
  width: var(--dot); height: var(--dot);
  margin-top: 1.05rem;  /* 年の数字の高さに合わせる */
  border: 2px solid var(--accent);
  border-radius: 50%;
  background: var(--paper);
}
.history-year{
  grid-row: 1;
  font: 500 clamp(1.9rem, 1.4rem + 1.6vw, 2.75rem)/1.1 var(--font-mono);
  letter-spacing: -.02em;
  color: var(--ink);
}
.history-card{
  grid-row: 1;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--paper);
  transition: border-color .2s ease;
}
.history-card:hover{ border-color: var(--accent); }
.detail-body .history-card p{ margin: 0; line-height: 1.85; }
/* 奇数:カードが左・年が右 / 偶数:年が左・カードが右 */
.history-item:nth-child(odd) .history-card{ grid-column: 1; }
.history-item:nth-child(odd) .history-year{ grid-column: 3; }
.history-item:nth-child(even) .history-year{ grid-column: 1; text-align: right; }
.history-item:nth-child(even) .history-card{ grid-column: 3; }

/* 節目の年:塗りつぶしの大きな点・青い年・ラベル */
.history-item.is-milestone .history-dot{
  --dot: 22px;
  margin-top: .8rem;
  border: 5px solid var(--paper);
  outline: 2px solid var(--accent);
  background: var(--accent);
}
.history-item.is-milestone .history-year{ color: var(--accent); font-weight: 600; }
.history-tag{
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .04em;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- PRCセミナー ---------- */
.prc-seminar-list{
  display: grid;
  gap: 28px;
}
.prc-seminar-card{
  position: relative;
  border-left: 5px solid var(--accent, #1a5f7a);
  padding: 28px 18px 18px;
  background: #fff;
  box-shadow: 0 1px 0 rgba(0,0,0,.04);
}
.prc-seminar-card--past{
  border-left-color: #6c757d;
  opacity: .88;
}
.prc-seminar-status{
  display: inline-block;
  padding: 3px 10px;
  font-size: .85rem;
  font-weight: 700;
  border-radius: 4px;
  color: #fff;
  background: var(--accent, #1a5f7a);
  line-height: 1.4;
}
/* 一覧カードは左上に重ねる */
.prc-seminar-card .prc-seminar-status{
  position: absolute;
  top: 14px;
  left: 15px;
}
.prc-seminar-status--past,
.prc-seminar-card--past .prc-seminar-status{
  background: #6c757d;
}
.prc-seminar-card .prc-meta{
  padding-right: 80px;
  margin-top: 8px;
  line-height: 1.7;
  color: #444;
}
/* 詳細は通常フローでバッジ → メタの順に並べる */
.prc-seminar-detail .prc-seminar-status{
  position: static;
  margin: 0 0 12px;
}
.prc-seminar-detail .prc-meta{
  margin-top: 0;
  padding-right: 0;
  line-height: 1.7;
  color: #444;
}
.prc-seminar-card .prc-title{
  margin: 14px 0 8px;
  font-size: 1.2rem;
  line-height: 1.45;
}
.prc-seminar-card .prc-title a{
  color: inherit;
  text-decoration: none;
}
.prc-seminar-card .prc-title a:hover{
  color: var(--accent, #1a5f7a);
  text-decoration: underline;
}
.prc-seminar-card .prc-speaker,
.prc-seminar-detail .prc-speaker{
  margin: 0 0 10px;
  color: #333;
}
.prc-seminar-excerpt{
  margin: 0 0 12px;
  color: #555;
  line-height: 1.7;
}
.prc-seminar-more{
  margin: 0;
  font-weight: 600;
}
.prc-seminar-divider{
  border: 0;
  border-top: 1px solid #ddd;
  margin: 8px 0;
}
.prc-seminar-detail{
  position: relative;
  padding-top: 0;
}
.prc-seminar-detail .prc-title{
  margin: 16px 0 10px;
  font-size: 1.55rem;
  line-height: 1.4;
}
.prc-seminar-detail .prc-block{
  margin-top: 20px;
}
.prc-seminar-detail .prc-block h4{
  margin: 0 0 10px;
}
.prc-image-block{
  text-align: center;
  margin: 1.5em 0;
}
.prc-image-block img,
.prc-seminar-image{
  width: 70%;
  max-width: 800px;
  height: auto;
}
.prc-image-block figcaption{
  margin-top: .5em;
  color: #666;
  font-size: .9em;
}
.prc-seminar-link{
  margin: 0 0 8px;
}

/* スクロールでふわっと表示(対応ブラウザのみ) */
@supports (animation-timeline: view()){
  @media (prefers-reduced-motion: no-preference){
    .history-item,
    .history-era-head{
      animation: rise-in linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 40%;
    }
  }
}

/* スマホ・タブレット:縦線を左に寄せて1列に */
@media (max-width: 760px){
  .history-ruler{ margin-bottom: 48px; padding: 40px 20px 16px; }
  .history-ruler-ticks span:nth-child(2),
  .history-ruler-ticks span:nth-child(5){ display: none; }  /* 1980・2010 は端の年と重なるので隠す */
  .history-timeline{ --axis: 15px; }
  .history-era + .history-era{ margin-top: 40px; }
  .history-era-head{
    margin: 0 0 28px;
    padding: 8px 0;
    display: grid;
    grid-template-columns: 30px 1fr;
    column-gap: 16px;
    align-items: center;
    text-align: left;
  }
  .history-era-num{ grid-row: span 2; min-width: 30px; height: 30px; padding: 0 4px; font-size: .72rem; }
  .detail-body .history-era-head h2{ margin: 0; }
  .detail-body .history-era-range{ grid-column: 2; }
  .detail-body .history-list{ gap: 24px; }
  .detail-body .history-item{ grid-template-columns: 30px 1fr; column-gap: 16px; }
  .history-dot{ grid-column: 1 !important; margin-top: .55rem; }
  .history-item.is-milestone .history-dot{ margin-top: .35rem; }
  .history-item .history-year{ grid-column: 2 !important; grid-row: 1; text-align: left !important; font-size: 1.75rem; }
  .history-item .history-card{ grid-column: 2 !important; grid-row: 2; margin-top: 8px; padding: 16px 18px; }
}