/*
  expo2025/style.css — 夢洲日和 スタンドアロンスタイル
  =====================================================
  ミャクミャクの「白い体・赤い模様・青い目」を
  落ち着いたトーンでサイトに反映したテーマ。
  style.css（歴史小説）とは完全に独立したファイル。

  赤（模様）: #c87878  ← 鮮やかさを抑えたコーラルレッド
  青（目）  : #6090c0  ← 柔らかいセルリアンブルー
  白（体）  : #f7f8fc  ← わずかに青みがかった清潔な白
  =====================================================
*/

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

/* ── 変数 ──────────────────────────────────── */
:root {
  --bg:          #f7f8fc;
  --bg-card:     #ffffff;
  --bg-nav:      rgba(247, 248, 252, 0.96);
  --text:        #252535;
  --text-muted:  #7878a0;
  --text-light:  #a0a0c0;
  --accent:      #c87878;
  --accent-dark: #a85858;
  --accent-dim:  rgba(200, 120, 120, 0.10);
  --accent-blue: #6090c0;
  --border:      rgba(200, 190, 220, 0.30);
  --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: #f7f8fc;
  color: #252535;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}
a { color: #c87878; text-decoration: none; transition: color var(--transition); }
a:hover { color: #a85858; }
img { max-width: 100%; display: block; }

/* ── 読書進捗バー ───────────────────────────── */
.reading-progress {
  position: fixed;
  top: 0; left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #c87878 0%, #6090c0 100%);
  z-index: 200;
  transition: width 0.1s linear;
}

/* ── ヘッダー ───────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(247, 248, 252, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(200, 190, 220, 0.35);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.site-header .logo {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  color: #252535;
  letter-spacing: 0.12em;
}
.site-header .logo:hover { color: #c87878; }
.header-nav {
  margin-left: auto;
  display: flex;
  gap: 20px;
}
.header-nav a {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: #7878a0;
}
.header-nav a:hover { color: #c87878; }

/* ── 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;
}

/* ── カテゴリラベル ─────────────────────────── */
.category-label {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #c87878;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.category-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(200, 190, 220, 0.40);
}

/* ── シリーズ トップ ヒーロー ───────────────── */
.expo-hero {
  min-height: 55vh;
  display: flex;
  align-items: flex-end;
  padding: 140px 24px 60px;
  background: linear-gradient(160deg, #eef0fa 0%, #f0ecf8 50%, #f7f4fc 100%);
  border-bottom: 1px solid rgba(200, 190, 220, 0.35);
}
.expo-hero-inner {
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}
.expo-eyebrow {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: #c87878;
  margin-bottom: 16px;
  display: block;
}
.expo-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 500;
  line-height: 1.25;
  color: #252535;
  margin-bottom: 16px;
  letter-spacing: 0.08em;
}
.expo-subtitle {
  font-size: 1rem;
  color: #7878a0;
  font-weight: 300;
  margin-bottom: 24px;
}
.expo-desc {
  font-size: 0.875rem;
  color: #7878a0;
  line-height: 2;
  max-width: 600px;
  font-family: var(--font-sans);
  font-weight: 300;
}

/* ── ストーリーカード ───────────────────────── */
.story-section {
  padding: 60px 0 80px;
  background: #f7f8fc;
}
.story-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.story-card {
  display: block;
  background: #ffffff;
  border: 1px solid rgba(200, 190, 220, 0.35);
  border-radius: var(--radius);
  padding: 28px 24px;
  color: #252535;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.story-card:hover {
  transform: translateY(-3px);
  border-color: #c87878;
  box-shadow: 0 6px 20px rgba(200, 120, 120, 0.12);
  color: #252535;
}
.story-card .story-num {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: #c87878;
  background: rgba(200, 120, 120, 0.10);
  padding: 2px 10px;
  border-radius: 50px;
  margin-bottom: 14px;
  display: inline-block;
  text-transform: uppercase;
}
.story-card h3 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 6px;
  line-height: 1.5;
  color: #252535;
}
.story-card .story-sub {
  font-size: 0.78rem;
  color: #7878a0;
  margin-bottom: 12px;
  font-family: var(--font-sans);
  font-weight: 300;
}
.story-card p {
  font-size: 0.825rem;
  color: #7878a0;
  line-height: 1.8;
  margin-bottom: 16px;
  font-family: var(--font-sans);
  font-weight: 300;
}
.story-meta {
  font-size: 0.72rem;
  color: #7878a0;
  font-family: var(--font-sans);
  font-weight: 300;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  border-top: 1px solid rgba(200, 190, 220, 0.30);
  padding-top: 12px;
  margin-top: 4px;
}

/* ── 話数インデックス ヒーロー ──────────────── */
.expo-vol-hero {
  padding: 120px 24px 60px;
  text-align: center;
  background: linear-gradient(160deg, #eef0fa 0%, #f0ecf8 100%);
  border-bottom: 1px solid rgba(200, 190, 220, 0.35);
}
.expo-vol-hero .story-num-large {
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #c87878;
  display: block;
  margin-bottom: 16px;
}
.expo-vol-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 500;
  margin-bottom: 8px;
  line-height: 1.35;
  color: #252535;
}
.expo-vol-hero .story-subtitle {
  font-size: 0.85rem;
  color: #c87878;
  margin-bottom: 8px;
  font-family: var(--font-sans);
}
.expo-vol-hero .tagline {
  font-size: 0.875rem;
  color: #7878a0;
  font-weight: 300;
  font-family: var(--font-sans);
}

/* ── チャプターリスト ───────────────────────── */
.chapter-list {
  max-width: 600px;
  margin: 0 auto;
  padding: 40px 24px 80px;
  background: #f7f8fc;
}
.chapter-list h2 {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #7878a0;
  font-family: var(--font-sans);
  font-weight: 400;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(200, 190, 220, 0.30);
}
.chapter-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(200, 190, 220, 0.20);
  color: #252535;
  transition: color var(--transition);
}
.chapter-item:hover { color: #c87878; }
.chapter-num {
  font-family: var(--font-en);
  font-size: 0.7rem;
  color: #c87878;
  min-width: 28px;
  flex-shrink: 0;
}
.chapter-title {
  font-size: 1rem;
  color: #252535;
}
.chapter-free {
  margin-left: auto;
  font-size: 0.65rem;
  font-family: var(--font-sans);
  color: #6090c0;
  border: 1px solid rgba(96, 144, 192, 0.30);
  padding: 2px 8px;
  border-radius: 50px;
  flex-shrink: 0;
}

/* ── 章ナビゲーション ───────────────────────── */
.chapter-nav-top {
  padding: 88px 24px 32px;
  max-width: var(--max-read);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.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: 12px;
}
.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: #7878a0;
  background: #ffffff;
  border: 1px solid rgba(200, 190, 220, 0.45);
  padding: 8px 18px;
  border-radius: 50px;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-btn:hover {
  background: #c87878;
  color: #ffffff;
  border-color: #c87878;
}
.nav-btn.disabled {
  background: transparent;
  color: #a0a0c0;
  border-color: rgba(200, 190, 220, 0.20);
  pointer-events: none;
  opacity: 0.5;
}

/* ── チャプターヘッダー ─────────────────────── */
.expo-chapter-header {
  max-width: var(--max-read);
  margin: 0 auto;
  padding: 32px 24px 40px;
  text-align: center;
  background: linear-gradient(180deg,
    rgba(200, 120, 120, 0.06) 0%,
    rgba(96, 144, 192, 0.03) 60%,
    transparent 100%);
}
.expo-chapter-header .series-name {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: #c87878;
  font-family: var(--font-sans);
  font-weight: 400;
  display: block;
  margin-bottom: 14px;
}
.expo-chapter-header h1 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 500;
  margin-bottom: 8px;
  line-height: 1.4;
  color: #252535;
}
.expo-chapter-header .chapter-sub {
  font-size: 0.85rem;
  color: #7878a0;
  font-weight: 300;
  font-family: var(--font-sans);
}

/* ── 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;
  color: #252535;
}
.chapter-body .thought {
  color: #7878a0;
  font-style: italic;
}
.scene-break {
  text-align: center;
  color: rgba(200, 120, 120, 0.5);
  letter-spacing: 0.5em;
  margin: 2.5em 0;
  font-size: 0.9rem;
}
.chapter-end {
  text-align: center;
  color: #c87878;
  font-size: 0.85rem;
  margin-top: 3em;
  padding-top: 2em;
  border-top: 1px solid rgba(200, 190, 220, 0.30);
  font-family: var(--font-sans);
  font-weight: 300;
  letter-spacing: 0.1em;
}
.next-preview {
  background: rgba(96, 144, 192, 0.06);
  border-left: 3px solid #6090c0;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  margin-top: 2em;
  font-size: 0.825rem;
  color: #7878a0;
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.7;
}
.next-preview strong {
  display: block;
  color: #6090c0;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.dialogue {
  border-left: 2px solid rgba(200, 120, 120, 0.25);
  padding-left: 16px;
  margin: 1.2em 0;
  color: #252535;
}
.expo-info {
  background: rgba(96, 144, 192, 0.06);
  border: 1px solid rgba(96, 144, 192, 0.20);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 0.8rem;
  color: #7878a0;
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.7;
  margin: 1.5em 0;
}
.expo-info strong {
  color: #6090c0;
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

/* ── 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: #7878a0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb a { color: #7878a0; }
.breadcrumb a:hover { color: #c87878; }
.breadcrumb-sep { opacity: 0.35; }
.breadcrumb-current { color: #a0a0c0; }

/* ── フッター ───────────────────────────────── */
.site-footer {
  background: #eef0f8;
  border-top: 1px solid rgba(200, 190, 220, 0.35);
  padding: 40px 24px;
  text-align: center;
}
.footer-logo {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  color: #252535;
  margin-bottom: 12px;
}
.footer-disclosure {
  font-size: 0.75rem;
  color: #7878a0;
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.8;
  max-width: 480px;
  margin: 0 auto 10px;
}
.footer-copy {
  font-size: 0.7rem;
  color: #a0a0c0;
  font-family: var(--font-sans);
  font-weight: 300;
}

/* ── フェードイン ───────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ── レスポンシブ ───────────────────────────── */
@media (max-width: 600px) {
  .chapter-body p { font-size: 0.975rem; }
  .chapter-nav-top { padding-top: 72px; }
  .header-nav { display: none; }
  .story-grid { grid-template-columns: 1fr; }
}