/* ============================================================
   占領下奇譚 — 小説サイト スタイルシート
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@300;400;500;700&family=Noto+Sans+JP:wght@300;400;500&family=Inter:wght@300;400;600&display=swap');

/* ── 変数 ─────────────────────────────── */
:root {
  --bg:          #0d0f14;
  --bg-card:     #13161f;
  --bg-nav:      rgba(13,15,20,0.95);
  --text:        #ddd5c0;
  --text-muted:  #7a7060;
  --text-light:  #a89880;
  --accent:      #c9a96e;
  --accent-dark: #a8854e;
  --accent-dim:  rgba(201,169,110,0.15);
  --red:         #8b3a3a;
  --border:      rgba(201,169,110,0.18);
  --font-serif:  'Noto Serif JP', 'Georgia', serif;
  --font-sans:   'Noto Sans JP', sans-serif;
  --font-en:     'Inter', sans-serif;
  --max-read:    680px;
  --radius:      8px;
  --transition:  0.25s ease;
}

/* ── リセット ───────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-serif);
  background: var(--bg);
  color: var(--text);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-dark); }
img { max-width: 100%; display: block; }

/* ── ヘッダー ───────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.site-header .logo {
  font-family: var(--font-en);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.site-header .logo-ja {
  font-family: var(--font-serif);
  font-size: 0.7rem;
  color: var(--text-muted);
  display: block;
  letter-spacing: 0.1em;
}
.header-nav {
  margin-left: auto;
  display: flex;
  gap: 20px;
}
.header-nav a {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.header-nav a:hover { color: var(--accent); }

/* ── コンテナ ───────────────────────── */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-read {
  max-width: var(--max-read);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── ヒーロー（トップページ） ───────── */
.hero-novel {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}
.hero-novel::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 40%, rgba(201,169,110,0.06) 0%, transparent 70%),
    repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(201,169,110,0.02) 40px, rgba(201,169,110,0.02) 41px);
  pointer-events: none;
}
.hero-eyebrow {
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.hero-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-weight: 300;
}
.hero-desc {
  max-width: 560px;
  margin: 0 auto 48px;
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 2;
}
.hero-divider {
  width: 40px;
  height: 1px;
  background: var(--accent);
  margin: 0 auto 48px;
  opacity: 0.5;
}

/* ── 作品カード ─────────────────────── */
.works-section { padding: 80px 0; }
.works-section h2 {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-weight: 400;
  text-transform: uppercase;
  margin-bottom: 32px;
  text-align: center;
}
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform var(--transition), border-color var(--transition);
  display: block;
  color: var(--text);
}
.work-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  color: var(--text);
}
.work-tag {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  display: block;
}
.work-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.5;
}
.work-card p {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}
.work-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  display: flex;
  gap: 12px;
}
.work-status {
  color: var(--accent);
  font-size: 0.7rem;
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 50px;
}

/* ── 章リスト（vol ページ） ──────────── */
.vol-hero {
  padding: 120px 24px 60px;
  text-align: center;
}
.vol-hero .kw {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}
.vol-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.35;
}
.vol-hero .tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 300;
}
.chapter-list {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 24px 80px;
}
.chapter-list h2 {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-weight: 400;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.chapter-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(201,169,110,0.08);
  color: var(--text);
  transition: color var(--transition);
}
.chapter-item:hover { color: var(--accent); }
.chapter-num {
  font-family: var(--font-en);
  font-size: 0.7rem;
  color: var(--text-muted);
  min-width: 28px;
  flex-shrink: 0;
}
.chapter-title { font-size: 1rem; }
.chapter-free {
  margin-left: auto;
  font-size: 0.65rem;
  font-family: var(--font-sans);
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 50px;
  flex-shrink: 0;
}

/* ── 本文リーダー ───────────────────── */
.chapter-nav-top {
  padding: 100px 24px 40px;
  max-width: var(--max-read);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.chapter-nav-top a, .chapter-nav-bottom a {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.chapter-nav-top a:hover, .chapter-nav-bottom a:hover { color: var(--accent); }

.chapter-header {
  max-width: var(--max-read);
  margin: 0 auto;
  padding: 0 24px 48px;
  text-align: center;
}
.chapter-header .series-name {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-weight: 400;
  display: block;
  margin-bottom: 16px;
}
.chapter-header h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}
.chapter-header .chapter-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 300;
}

/* 本文 */
.chapter-body {
  max-width: var(--max-read);
  margin: 0 auto;
  padding: 0 24px 80px;
}
.chapter-body p {
  font-size: 1.05rem;
  line-height: 2.1;
  margin-bottom: 1.6em;
  text-align: justify;
}
.chapter-body .thought {
  color: var(--text-muted);
  font-style: italic;
}
.scene-break {
  text-align: center;
  color: var(--accent);
  letter-spacing: 0.5em;
  margin: 2.5em 0;
  opacity: 0.5;
  font-size: 0.9rem;
}
.chapter-end {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 3em;
  padding-top: 2em;
  border-top: 1px solid var(--border);
  font-family: var(--font-sans);
  font-weight: 300;
  letter-spacing: 0.1em;
}
.next-preview {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-top: 2em;
  font-size: 0.825rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  line-height: 1.7;
}
.next-preview strong {
  display: block;
  color: var(--accent);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

/* ── ナビゲーション（章下部） ────────── */
.chapter-nav-bottom {
  max-width: var(--max-read);
  margin: 0 auto;
  padding: 0 24px 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.825rem;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 50px;
  transition: all var(--transition);
}
.nav-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.nav-btn.disabled {
  opacity: 0.3;
  pointer-events: none;
}

/* ── フッター ───────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
  text-align: center;
}
.footer-logo {
  font-family: var(--font-en);
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}
.footer-disclosure {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  line-height: 1.8;
  max-width: 480px;
  margin: 0 auto 12px;
}
.footer-copy {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-en);
  opacity: 0.5;
}

/* ── 進捗バー ───────────────────────── */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent);
  z-index: 200;
  transition: width 0.1s linear;
}

/* ── レスポンシブ ───────────────────── */
@media (max-width: 600px) {
  .hero-title { font-size: 2rem; }
  .chapter-body p { font-size: 0.975rem; }
  .chapter-nav-top { padding-top: 80px; }
  .header-nav { display: none; }
}

/* ── ポータルページ ─────────────────── */
.portal-hero {
  min-height: 65vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}
.portal-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 50% 60% at 50% 50%, rgba(201,169,110,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.portal-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 300;
  color: var(--text);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-family: var(--font-en);
  margin-bottom: 12px;
}
.portal-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-serif);
  font-weight: 300;
  letter-spacing: 0.08em;
}
.portal-desc {
  max-width: 480px;
  margin: 0 auto 0;
  font-size: 0.875rem;
  color: var(--text-light);
  line-height: 2;
}

/* ── シリーズサブサイト（占領下奇譚） ── */
.series-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}
.series-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 40%, rgba(139,58,58,0.09) 0%, transparent 60%),
    radial-gradient(ellipse 60% 60% at 50% 55%, rgba(201,169,110,0.05) 0%, transparent 70%),
    repeating-linear-gradient(0deg, transparent, transparent 60px, rgba(201,169,110,0.012) 60px, rgba(201,169,110,0.012) 61px);
  pointer-events: none;
}
.series-hero-inner { position: relative; z-index: 1; }
.series-eyebrow {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 24px;
  display: block;
}
.series-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
  text-shadow: 0 2px 40px rgba(0,0,0,0.6);
}
.series-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 300;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}
.series-desc {
  max-width: 560px;
  margin: 0 auto 48px;
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 2.2;
}

/* ── エピソードグリッド ─────────────── */
.episode-section { padding: 60px 0 120px; }
.episode-section h2 {
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: var(--font-en);
  font-weight: 400;
  margin-bottom: 40px;
  text-align: center;
}
.episode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.episode-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform var(--transition), border-color var(--transition);
  display: block;
  color: var(--text);
  position: relative;
  overflow: hidden;
}
.episode-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.episode-card:hover { transform: translateY(-3px); border-color: var(--accent); color: var(--text); }
.episode-card:hover::after { opacity: 1; }
.episode-card.coming-soon { opacity: 0.38; cursor: default; pointer-events: none; }
.episode-num {
  font-family: var(--font-en);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
}
.episode-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}
.episode-period {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-weight: 300;
  font-family: var(--font-sans);
}
.episode-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}
.episode-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 0.7rem;
  font-family: var(--font-sans);
  color: var(--text-muted);
}
.episode-badge {
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 50px;
  font-size: 0.65rem;
}

/* ── パンくずナビ ───────────────────── */
.breadcrumb {
  padding: 80px 24px 0;
  max-width: 1000px;
  margin: 0 auto;
  font-size: 0.72rem;
  font-family: var(--font-sans);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb a { color: var(--text-muted); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { opacity: 0.35; font-size: 0.65rem; }
.breadcrumb-current { color: var(--text-light); }

/* ============================================================
   Expo 2025 大阪・関西万博 — 追加スタイル
   ============================================================ */

/* ── Expo ポータル ヒーロー ────────────────────── */
.portal-hero {
  min-height: 65vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}
.portal-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 50% 40%, rgba(201,169,110,0.05) 0%, transparent 70%);
  pointer-events: none;
}
.portal-title {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  font-family: var(--font-en);
}
.portal-sub {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 300;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}
.portal-desc {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 2;
  max-width: 520px;
  margin: 0 auto;
}

/* ── カテゴリ見出し ─────────────────────────────── */
.category-label {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.category-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── 万博サブサイト ヒーロー ────────────────────── */
.expo-hero {
  min-height: 55vh;
  display: flex;
  align-items: flex-end;
  padding: 140px 24px 60px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, rgba(220,60,60,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 70% 70%, rgba(60,130,220,0.05) 0%, transparent 60%);
}
.expo-hero-inner {
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}
.expo-eyebrow {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: #c05050;
  margin-bottom: 16px;
  display: block;
}
.expo-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 16px;
}
.expo-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 300;
  margin-bottom: 24px;
}
.expo-desc {
  font-size: 0.875rem;
  color: var(--text-light);
  line-height: 2;
  max-width: 600px;
}

/* ── 万博 ストーリーカード ──────────────────────── */
.story-section {
  padding: 60px 0 80px;
}
.story-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.story-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  color: var(--text);
  transition: transform var(--transition), border-color var(--transition);
  position: relative;
}
.story-card:hover {
  transform: translateY(-3px);
  border-color: rgba(192,80,80,0.4);
  color: var(--text);
}
.story-card .story-num {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: #c05050;
  margin-bottom: 12px;
  display: block;
  text-transform: uppercase;
}
.story-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.5;
}
.story-card .story-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-family: var(--font-sans);
}
.story-card p {
  font-size: 0.825rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}
.story-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── 万博 章ナビ・ヘッダー ──────────────────────── */
.expo-chapter-header {
  max-width: var(--max-read);
  margin: 0 auto;
  padding: 0 24px 48px;
  text-align: center;
}
.expo-chapter-header .series-name {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: #c05050;
  font-family: var(--font-sans);
  font-weight: 400;
  display: block;
  margin-bottom: 16px;
}
.expo-chapter-header h1 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}
.expo-chapter-header .chapter-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 300;
}

/* 万博本文の会話スタイル */
.dialogue {
  border-left: 2px solid rgba(192,80,80,0.3);
  padding-left: 16px;
  margin: 1.2em 0;
  color: var(--text);
}

/* 万博パビリオン情報ボックス */
.expo-info {
  background: rgba(192,80,80,0.05);
  border: 1px solid rgba(192,80,80,0.2);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-sans);
  line-height: 1.7;
  margin: 1.5em 0;
}
.expo-info strong {
  color: #c05050;
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

/* ── 万博 vol ヒーロー ─────────────────────────── */
.expo-vol-hero {
  padding: 120px 24px 60px;
  text-align: center;
}
.expo-vol-hero .story-num-large {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #c05050;
  display: block;
  margin-bottom: 16px;
}
.expo-vol-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.35;
}
.expo-vol-hero .story-subtitle {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 8px;
}
.expo-vol-hero .tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 300;
}