/* -------------------------------------------------------------
   MIU OKINAWA OCEAN PORTFOLIO - STYLE SYSTEM
   Premium Editorial, Apple-Style Motion & 3D Book Fan-Out
   ------------------------------------------------------------- */

/* デザイン変数 */
:root {
    --color-dark-ocean: #010a11;
    --color-light-sand: #f8f9fa;
    --color-pure-white: #ffffff;
    --color-text-dark: #111518;
    --color-text-light: #f1f3f5;
    --color-text-muted-dark: #6c757d;
    --color-text-muted-light: #adb5bd;
    --color-accent-teal: #008f9c;
    --color-accent-teal-bright: #00d4e6;
    
    --font-serif: 'Cormorant Garamond', serif;
    --font-sans: 'Inter', sans-serif;
    
    --transition-smooth: all 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
    --transition-snappy: all 0.35s cubic-bezier(0.25, 1, 0.5, 1);
}

/* リセット */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background-color: var(--color-dark-ocean);
    color: var(--color-text-light);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
}

/* タイポグラフィ */
h1, h2, h3, .brand-name {
    font-family: var(--font-serif);
    font-weight: 300;
}

/* スクロールバー */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--color-dark-ocean);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-teal);
}

/* ==========================================
   1. ナビゲーション (Apple風ぼかし半透明)
   ========================================== */
.nav-bar {
    position: fixed; /* Apple風に固定配置 */
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between; /* 左右に美しく分散配置 */
    align-items: center;
    padding: 25px 60px;
    z-index: 100;
    transition: var(--transition-smooth);
    border-bottom: 1px solid transparent;
}

/* スクロール時の変化クラス */
.nav-bar.scrolled {
    padding: 15px 60px;
    background: rgba(1, 10, 17, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* 左側のロゴ ＆ コネクトコンテナ */
.nav-left-container {
    display: flex;
    align-items: center;
    gap: 24px;
}

.brand-logo {
    display: flex;
    align-items: center;
    transition: var(--transition-smooth);
}

.signature-logo {
    height: 52px; /* サインの視認性を高めるよう大きめに調整 */
    width: auto;
    display: block;
    /* サイン画像が黒文字の場合に白く反転し、コントラストを強調 */
    filter: invert(1) brightness(1.8);
    opacity: 0.88;
    transition: var(--transition-smooth);
}

.brand-logo:hover .signature-logo {
    opacity: 1;
    filter: invert(1) brightness(2.2) drop-shadow(0 0 12px rgba(255, 255, 255, 0.5));
    transform: scale(1.03);
}

/* 極細の縦区切り線 */
.nav-box-split {
    width: 1px;
    height: 24px; /* サインの拡大に合わせて高さを最適化 */
    background-color: rgba(255, 255, 255, 0.15);
}

/* ミニマルコネクトリンク（アドブロック回避のため sns/social のクラス名を完全排除） */
.nav-connect-box {
    display: flex;
    align-items: center;
    gap: 18px; /* アイコンサイズ拡大に伴い隙間を微調整 */
}

.nav-link-icon {
    color: var(--color-text-light);
    opacity: 0.55;
    display: flex;
    flex-direction: column; /* アイコンの下に文字を置くよう縦並びフレックスボックス化 */
    align-items: center;
    gap: 4px; /* アイコンと文字の間の微細な間隔 */
    transition: var(--transition-smooth);
    padding: 3px;
    text-decoration: none;
}

.nav-link-icon svg {
    width: 19px; /* アイコンをひと回り大きめに拡大 */
    height: 19px;
}

.icon-label {
    font-family: var(--font-sans);
    font-size: 0.52rem; /* 極小の洗練された文字サイズ（約8px） */
    font-weight: 600;
    letter-spacing: 0.08em;
    line-height: 1;
    margin-top: 1px;
    text-transform: uppercase;
}

.nav-link-icon:hover {
    opacity: 1;
    color: var(--color-accent-teal-bright);
    transform: translateY(-2px); /* ホバー時に優雅に上にスライド */
}

.brand-name {
    display: none !important;
}

.nav-right-container {
    display: flex;
    align-items: center;
    gap: 40px;
}

/* エレガントな言語切り替えスイッチ */
.lang-selector {
    display: flex;
    gap: 15px;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    backdrop-filter: blur(8px);
}

.lang-btn {
    background: none;
    border: none;
    color: var(--color-text-muted-light);
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    padding: 2px 6px;
    transition: var(--transition-smooth);
    position: relative;
    opacity: 0.6;
}

.lang-btn:hover {
    color: var(--color-text-light);
    opacity: 1;
}

.lang-btn.active {
    color: var(--color-accent-teal-bright);
    opacity: 1;
}

.lang-btn.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 3px;
    background-color: var(--color-accent-teal-bright);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--color-accent-teal-bright);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.75rem;
    font-family: var(--font-sans);
    letter-spacing: 0.2em;
    transition: var(--transition-smooth);
    opacity: 0.8;
}

.nav-links a:hover {
    opacity: 1;
    color: var(--color-accent-teal-bright);
}

/* ==========================================
   2. ヒーローセクション（Apple風スクロール連動）
   ========================================== */
.hero-section {
    position: relative;
    height: 100vh; /* 全画面 */
    display: grid;
    grid-template-columns: 1.05fr 0.95fr; /* 写真拡大に伴いカラム比率を最適化 */
    align-items: center;
    padding: 0 8%;
    gap: 6%; /* 余白を微細に拡大 */
    overflow: hidden;
}

.hero-bg-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.hero-bg, .hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    filter: brightness(0.65);
    transition: opacity 1s ease;
}

.hero-video {
    z-index: 1;
}

.hero-video.hidden {
    opacity: 0;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(1, 10, 17, 0.3) 0%, rgba(1, 10, 17, 0.95) 100%);
    z-index: 2;
}

/* 🌟極薄ガラスモーフィズムプレートによる超ハイエンドな文字エリア演出 */
.hero-content {
    max-width: 680px; /* 大判化しゆったりとした極上のスケール感へ */
    width: 100%;
    box-sizing: border-box;
    z-index: 5;
    animation: fade-in-up 1.5s cubic-bezier(0.165, 0.84, 0.44, 1) forwards;
    padding: 45px 50px; /* 余白を贅沢に拡張 */
    background: rgba(1, 10, 17, 0.38);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

@keyframes fade-in-up {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 🌟新規追加: 3Dフローティングアートフレームコンテナ */
.hero-art-frame-container {
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 5;
    animation: fade-in-right 1.8s cubic-bezier(0.165, 0.84, 0.44, 1) forwards,
               floating-slow-hero 9s ease-in-out infinite alternate;
}

@keyframes fade-in-right {
    from { opacity: 0; transform: translateX(60px); }
    to { opacity: 1; transform: translateX(0); }
}

/* 呼吸するように優雅に浮遊するフローティングモーション */
@keyframes floating-slow-hero {
    0% { transform: translateY(0) rotate(0deg); }
    100% { transform: translateY(-16px) rotate(1.2deg); }
}

/* 高級な3Dガラス額縁アートフレーム (ユーザー要望によりダイナミックに大判化 ＆ 3D書籍（厚み/背表紙）化) */
.hero-art-frame {
    position: relative;
    width: 410px;
    height: 550px;
    background-color: rgba(1, 10, 17, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
    /* 🌟本物の書籍のような「小口の厚み」「積層ページ」を表現する3D重層シャドウ */
    box-shadow: 
        1px 1px 0px rgba(255, 255, 255, 0.08),
        2px 2px 0px rgba(0, 0, 0, 0.22),
        3px 3px 0px rgba(255, 255, 255, 0.05),
        4px 4px 0px rgba(0, 0, 0, 0.25),
        5px 5px 0px rgba(255, 255, 255, 0.03),
        6px 6px 0px rgba(0, 0, 0, 0.3),
        8px 8px 1px rgba(0, 0, 0, 0.15),
        12px 12px 25px rgba(0, 0, 0, 0.55);
    padding: 6px; /* 額縁感をなくし、本物のブックカバー（Jacket）のように極細枠化 */
    overflow: hidden;
    transform-origin: center center;
    transform: perspective(1200px) rotateY(-11deg) rotateX(1deg); /* 3D書籍らしい絶妙な浮遊角度へ最適化 */
    transition: var(--transition-smooth);
}

/* 🌟本物の書籍のような「背表紙の綴じ目・折り目のシャドウ (Crease Shadow)」を擬似的に重ねる */
.hero-art-frame::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 28px; /* 背表紙の綴じ目の幅 */
    height: 100%;
    /* 縦方向のグラデーションによって、背表紙と表紙の間の立体的な窪みと光の反射を完全再現 */
    background: linear-gradient(to right, 
        rgba(0, 0, 0, 0.5) 0%, 
        rgba(0, 0, 0, 0.25) 20%, 
        rgba(255, 255, 255, 0.06) 35%, 
        rgba(0, 0, 0, 0.18) 52%, 
        rgba(0, 0, 0, 0) 100%
    );
    z-index: 10; /* スライド画像より手前に重ねて影を落とす */
    pointer-events: none;
}

.hero-art-frame:hover {
    transform: perspective(1000px) rotateY(0deg) scale(1.025);
    border-color: var(--color-accent-teal-bright);
    box-shadow: 0 40px 80px rgba(0, 212, 230, 0.2),
                inset 0 0 15px rgba(0, 212, 230, 0.08);
}

/* スライドショーの各ビジュアル（Ken Burns効果 ＆ クロスフェード） */
.art-slide {
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    bottom: 6px;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.8s cubic-bezier(0.25, 1, 0.5, 1),
                transform 7s ease-out;
    transform: scale(1.08);
    z-index: 1;
}

.art-slide.active {
    opacity: 1;
    z-index: 2;
    transform: scale(1.02); /* ロード時にゆっくりと適正サイズへズーム */
}

/* シネマティックなロケーション情報のオーバーレイ */
.art-frame-overlay {
    position: absolute;
    bottom: 25px;
    left: 25px;
    z-index: 10;
    display: flex;
    flex-direction: column;
    gap: 3px;
    pointer-events: none;
}

.art-location {
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--color-accent-teal-bright);
    display: flex;
    align-items: center;
    gap: 5px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
}

.art-location svg {
    width: 10px;
    height: 10px;
}

.art-photographer {
    font-family: var(--font-sans);
    font-size: 0.52rem;
    letter-spacing: 0.25em;
    color: var(--color-text-muted-light);
    text-transform: uppercase;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
}

.hero-subtitle {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    color: var(--color-accent-teal-bright);
    font-weight: 600;
    display: block;
    margin-bottom: 20px;
}

.hero-title {
    font-size: clamp(1.4rem, 3.2vw, 3.6rem);
    line-height: 1.2;
    letter-spacing: 0.06em;
    margin-bottom: 25px;
    color: var(--color-text-light);
}

.hero-title .light-text {
    font-weight: 300;
    font-style: normal;
    opacity: 0.85;
}

.hero-desc {
    font-size: 0.95rem;
    font-weight: 300;
    line-height: 1.8;
    color: var(--color-text-muted-light);
    margin-bottom: 40px;
}

/* 🌟新規追加: What's New & プレミアムクイックリンク集のスタイリング */
.hero-extra-panel {
    margin-top: 45px; /* さらに間隔を広げゆったりとした配置へ */
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.hero-news {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.news-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 3px 10px;
    border-radius: 12px;
    flex-shrink: 0;
}

.news-dot {
    width: 6px;
    height: 6px;
    background-color: var(--color-accent-teal-bright);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--color-accent-teal-bright);
    animation: pulse-glow-news 1.5s infinite;
}

@keyframes pulse-glow-news {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}

.news-tag-text {
    font-family: var(--font-sans);
    font-size: 0.58rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-accent-teal-bright);
}

.news-text {
    font-size: 0.8rem;
    color: var(--color-text-muted-light);
    line-height: 1.5;
    margin: 0;
    font-weight: 300;
}

.extra-divider {
    height: 1px;
    background-color: rgba(255, 255, 255, 0.05);
}

.hero-quick-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.quick-link-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-light);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    opacity: 0.55;
    transition: var(--transition-smooth);
}

/* 🌟プレミアム2大導線の極上バッジ型スタイル */
.quick-link-item.premium-cta-link {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 10px 22px;
    border-radius: 4px;
    opacity: 0.82;
    gap: 10px;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.quick-link-item.premium-cta-link svg,
.quick-link-item.premium-cta-link i {
    width: 14px;
    height: 14px;
    color: var(--color-accent-teal-bright);
    transition: var(--transition-smooth);
}

.quick-link-item.premium-cta-link:hover {
    opacity: 1;
    color: var(--color-accent-teal-bright);
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(0, 212, 230, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 212, 230, 0.15);
}

.quick-link-item.premium-cta-link:hover svg,
.quick-link-item.premium-cta-link:hover i {
    transform: scale(1.15) rotate(8deg);
}

/* スクロールインジケーター */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-family: var(--font-sans);
    font-size: 0.65rem;
    letter-spacing: 0.3em;
    color: var(--color-text-muted-light);
    opacity: 0.7;
    animation: fade-in 2s 1s ease forwards;
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 0.7; }
}

.indicator-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, var(--color-accent-teal-bright), transparent);
    position: relative;
    overflow: hidden;
}

.indicator-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 20px;
    background: var(--color-pure-white);
    animation: scroll-line-flow 2s infinite ease-in-out;
}

@keyframes scroll-line-flow {
    0% { transform: translateY(-20px); }
    100% { transform: translateY(50px); }
}

/* ボタン */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 35px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-decoration: none;
    transition: var(--transition-smooth);
    border-radius: 0;
}

.btn-primary {
    background-color: var(--color-pure-white);
    color: var(--color-text-dark);
}

.btn-primary:hover {
    background-color: var(--color-accent-teal-bright);
    color: var(--color-text-dark);
    box-shadow: 0 10px 20px rgba(0, 212, 230, 0.2);
}

.btn-secondary {
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--color-text-light);
    margin-left: 20px;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--color-pure-white);
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 40px;
}

.hero-cta .btn {
    padding: 13px 25px;
    margin: 0 !important;
    font-size: 0.72rem;
}

/* ==========================================
   3. ソーシャルバー (強いコントラスト)
   ========================================== */
.social-bar {
    background-color: var(--color-pure-white);
    padding: 45px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.social-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.social-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-text-dark);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    opacity: 0.75;
    transition: var(--transition-smooth);
}

.social-item svg {
    width: 18px;
    height: 18px;
    transition: var(--transition-smooth);
}

.social-item:hover {
    opacity: 1;
    color: var(--color-accent-teal);
}

.social-item:hover svg {
    transform: scale(1.15);
    color: var(--color-accent-teal);
}

/* ==========================================
   4. Apple風 スクロール・リビール共通エフェクト
   ========================================== */
.scroll-reveal-element {
    opacity: 0;
    transform: translateY(60px) scale(0.98);
    transition: opacity 1.2s cubic-bezier(0.165, 0.84, 0.44, 1), 
                transform 1.2s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.scroll-reveal-element.reveal-active {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* ==========================================
   5. 書籍セクション ＆ 3D パラパラ・プレビュー
   ========================================== */
.section {
    padding: 140px 0;
}

.books-section {
    background-color: var(--color-pure-white);
    color: var(--color-text-dark);
}

.section-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 40px;
}

.section-header {
    margin-bottom: 90px;
    max-width: 700px;
}

.sect-num {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.25em;
    color: var(--color-accent-teal);
    display: block;
    margin-bottom: 15px;
}

.section-title {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-muted-dark);
    font-weight: 300;
}

/* 書籍グリッド */
.books-grid {
    display: flex;
    flex-direction: column;
    gap: 120px;
}

.book-card {
    display: grid;
    grid-template-columns: 500px 1fr;
    gap: 80px;
    align-items: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding-bottom: 120px;
}

.book-card:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

/* 書籍左右交互配置 */
.book-card:nth-child(even) {
    grid-template-columns: 1fr 500px;
}

.book-card:nth-child(even) .book-cover-container {
    grid-column: 2;
    grid-row: 1;
}

.book-card:nth-child(even) .book-info {
    grid-column: 1;
    grid-row: 1;
    padding-right: 60px;
    padding-left: 0;
}

/* 3D パラパラプレビューコアコンテナ */
.book-cover-container {
    position: relative;
    width: 100%;
    aspect-ratio: 3 / 4;
    perspective: 1500px; /* 3D空間の奥行き */
    cursor: pointer;
    z-index: 10;
}

/* カバー画像ラッパー */
.book-cover-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 4; /* 一番手前 */
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    transform-origin: left center;
    transition: var(--transition-smooth);
    overflow: hidden;
}

.book-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-badge {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.85);
    color: var(--color-pure-white);
    font-family: var(--font-sans);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    padding: 6px 12px;
    z-index: 5;
}

/* パラパラプレビューページファン (ホバー時に扇状に広がる) */
.book-previews-fan {
    position: absolute;
    top: 5%;
    left: 5%;
    width: 90%;
    height: 90%;
    z-index: 1;
}

.preview-page {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-dark-ocean);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    border: 3px solid var(--color-pure-white);
    transform-origin: center center;
    transition: var(--transition-smooth);
    opacity: 0; /* 最初は見えない */
    pointer-events: none;
}

.preview-page img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 各ページの重なり順とデフォルトの僅かな傾き */
.preview-page.page-1 { z-index: 3; }
.preview-page.page-2 { z-index: 2; }
.preview-page.page-3 { z-index: 1; }

/* 🌟 【超プレミアムホバーエフェクト】：3Dめくり ＆ ファンアウト */
.book-cover-container:hover .book-cover-wrapper {
    /* 本のカバーがスッとめくれるように左側を軸に左へ3D傾斜 */
    transform: rotateY(-38deg) translateZ(40px) scale(0.95);
    box-shadow: -15px 25px 45px rgba(0, 0, 0, 0.35);
}

/* ジャンプ先書籍カードの優雅なパルス発光アニメーション */
@keyframes pulse-highlight {
    0% { 
        box-shadow: 0 0 0 rgba(0, 212, 230, 0); 
        border-color: rgba(255, 255, 255, 0.1);
        transform: scale(1);
    }
    30% { 
        box-shadow: 0 0 35px rgba(0, 212, 230, 0.35); 
        border-color: var(--color-accent-teal-bright);
        transform: scale(1.015);
    }
    100% { 
        box-shadow: 0 0 0 rgba(0, 212, 230, 0); 
        border-color: rgba(255, 255, 255, 0.1);
        transform: scale(1);
    }
}

.book-card.highlight-card {
    animation: pulse-highlight 1.8s cubic-bezier(0.25, 1, 0.5, 1) forwards;
    z-index: 50;
}

/* ホバー時にプレビューページ群がトランプのように扇状に展開 */
.book-cover-container:hover .preview-page {
    opacity: 1;
}

.book-cover-container:hover .preview-page.page-1 {
    transform: rotate(6deg) translateX(55px) translateZ(10px) scale(0.98);
}

.book-cover-container:hover .preview-page.page-2 {
    transform: rotate(-4deg) translateX(110px) translateZ(-10px) scale(0.95);
}

.book-cover-container:hover .preview-page.page-3 {
    transform: rotate(12deg) translateX(160px) translateZ(-30px) scale(0.92);
}

/* 情報エリア */
.book-info {
    padding-left: 20px;
}

.book-subtitle {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent-teal);
    letter-spacing: 0.2em;
    display: block;
    margin-bottom: 12px;
}

.book-title {
    font-size: 2.4rem;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.book-desc {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-text-muted-dark);
    margin-bottom: 30px;
    font-weight: 300;
}

.book-footer {
    display: flex;
    align-items: center;
    gap: 40px;
}

.book-price {
    font-family: var(--font-sans);
    font-size: 1.3rem;
    font-weight: 300;
}

.btn-buy {
    background-color: var(--color-text-dark);
    color: var(--color-pure-white);
    text-decoration: none;
    padding: 15px 30px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-smooth);
}

.btn-buy:hover {
    background-color: var(--color-accent-teal);
    box-shadow: 0 10px 20px rgba(0, 143, 156, 0.25);
}

/* ==========================================
   6. ギャラリーセクション (スクロール連動ズーム)
   ========================================== */
.gallery-section {
    background-color: var(--color-dark-ocean);
    color: var(--color-text-light);
}

.gallery-section .section-subtitle {
    color: var(--color-text-muted-light);
}

/* 非対称エディトリアルグリッド */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 60px;
}

/* ギャラリー項目 */
.gallery-item {
    cursor: pointer;
}

.gallery-item:nth-child(even) {
    margin-top: 80px; /* 段差リズム */
}

/* Apple風ズーム用イメージコンテナ */
.zoom-container {
    position: relative;
    overflow: hidden;
    aspect-ratio: 3 / 4;
    background-color: #000;
}

.zoom-on-scroll {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* CSS変数 --scroll-zoom-scale をJS経由で設定し、スクロール量に応じて動的に制御 */
    transform: scale(var(--scroll-zoom-scale, 1.08));
    transition: transform 0.2s ease-out; /* 微小に遅延させてぬるぬる感を付与 */
}

.gallery-hover-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(1, 10, 17, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    z-index: 5;
    transition: var(--transition-smooth);
}

.gallery-item:hover .gallery-hover-overlay {
    opacity: 1;
}

.view-log {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    border-bottom: 1px solid var(--color-text-light);
    padding-bottom: 5px;
}

.gallery-info {
    margin-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.gallery-loc {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    color: var(--color-accent-teal-bright);
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 4px;
}

.gallery-loc svg {
    width: 12px;
    height: 12px;
}

.gallery-item-title {
    font-size: 1.3rem;
    letter-spacing: 0.05em;
    font-weight: 300;
}

/* ==========================================
   7. アバウトセクション
   ========================================== */
.about-section {
    background-color: var(--color-pure-white);
    color: var(--color-text-dark);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text {
    padding-right: 40px;
}

.about-title {
    font-size: 3rem;
    margin-bottom: 30px;
    letter-spacing: 0.05em;
}

.about-p {
    font-size: 0.95rem;
    line-height: 1.9;
    color: var(--color-text-muted-dark);
    margin-bottom: 25px;
    font-weight: 300;
}

.about-signatures {
    margin-top: 40px;
}

.sig-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    letter-spacing: 0.2em;
    font-style: italic;
    color: var(--color-text-dark);
}

.about-image-wrapper {
    box-shadow: 0 30px 60px rgba(0,0,0,0.12);
    overflow: hidden;
}

.about-img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition-smooth);
}

.about-image-wrapper:hover .about-img {
    transform: scale(1.03);
}


/* ==========================================
   7.5 シミュレーターセクション (Miu Private Lens)
   ========================================== */
.simulator-section {
    background-color: var(--color-dark-ocean);
    color: var(--color-text-light);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.simulator-grid {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: 80px;
    align-items: center;
}

/* カメラファインダーシミュレーションUI */
.simulator-viewfinder-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 3 / 4; /* 3:4の縦長ポートレート比に最適化 */
    overflow: hidden;
    box-shadow: 0 40px 90px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.simulator-preview-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: brightness(0.68) contrast(1.1);
    transition: var(--transition-smooth);
}

/* ファインダーオーバーレイ */
.viewfinder-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* 4隅のコーナー枠 */
.viewfinder-corners {
    display: none !important; /* 4隅枠は非表示 */
    position: absolute;
    top: 25px;
    left: 25px;
    right: 25px;
    bottom: 25px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    pointer-events: none;
}

.viewfinder-corners::before, .viewfinder-corners::after {
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    border: 2px solid var(--color-pure-white);
    pointer-events: none;
}

/* 左上と右下のL字フレーム */
.viewfinder-corners::before {
    top: -2px;
    left: -2px;
    border-right: none;
    border-bottom: none;
}

.viewfinder-corners::after {
    bottom: -2px;
    right: -2px;
    border-left: none;
    border-top: none;
}

/* 右上と左下のL字フレームを追加 */
.simulator-viewfinder-wrapper::before, .simulator-viewfinder-wrapper::after {
    display: none !important; /* 4隅枠は非表示 */
    content: '';
    position: absolute;
    width: 25px;
    height: 25px;
    border: 2px solid var(--color-pure-white);
    z-index: 11;
    pointer-events: none;
}

.simulator-viewfinder-wrapper::before {
    top: 23px;
    right: 23px;
    border-left: none;
    border-bottom: none;
}

.simulator-viewfinder-wrapper::after {
    bottom: 23px;
    left: 23px;
    border-right: none;
    border-top: none;
}

/* ファインダーの三分割グリッド線 */
.viewfinder-grid {
    position: absolute;
    top: 25px;
    left: 25px;
    right: 25px;
    bottom: 25px;
    pointer-events: none;
}

.viewfinder-grid::before, .viewfinder-grid::after {
    content: '';
    position: absolute;
    background-color: rgba(255, 255, 255, 0.06);
}

.viewfinder-grid::before {
    left: 33.33%;
    right: 33.33%;
    top: 0;
    bottom: 0;
    border-left: 1px dashed rgba(255, 255, 255, 0.08);
    border-right: 1px dashed rgba(255, 255, 255, 0.08);
}

.viewfinder-grid::after {
    top: 33.33%;
    bottom: 33.33%;
    left: 0;
    right: 0;
    border-top: 1px dashed rgba(255, 255, 255, 0.08);
    border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
}

/* ステータス情報 */
.viewfinder-status {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    z-index: 12;
    position: absolute;
    top: 35px;
    left: 0;
    padding: 0 45px;
}

.viewfinder-rec {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--color-pure-white);
    display: flex;
    align-items: center;
    gap: 6px;
}

.rec-dot {
    width: 7px;
    height: 7px;
    background-color: #ff3b30;
    border-radius: 50%;
    box-shadow: 0 0 6px #ff3b30;
    animation: pulse-glow 1.2s infinite;
}

.viewfinder-af {
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-accent-teal-bright);
    border: 1px solid var(--color-accent-teal-bright);
    padding: 2px 6px;
    border-radius: 2px;
}

/* ホバー時のファインダー揺れ（手ブレ再現） */
.simulator-viewfinder-wrapper:hover .simulator-preview-img {
    transform: scale(1.04);
    filter: brightness(0.78) contrast(1.15);
}

/* 紹介テキストエリア */
.simulator-info {
    padding-left: 20px;
}

.simulator-features {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin: 35px 0 45px 0;
}

.feature-card {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.feature-icon {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-teal-bright);
    transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon {
    background-color: var(--color-accent-teal-bright);
    color: var(--color-text-dark);
    box-shadow: 0 0 15px rgba(0, 212, 230, 0.3);
}

.feature-icon svg {
    width: 20px;
    height: 20px;
}

.feature-text h4 {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
    color: var(--color-text-light);
}

.feature-text p {
    font-size: 0.8rem;
    line-height: 1.6;
    color: var(--color-text-muted-light);
    font-weight: 300;
}

.simulator-cta {
    margin-top: 10px;
}

/* レスポンシブ調整（シミュレーター） */
@media (max-width: 1100px) {
    .simulator-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    .simulator-info {
        padding-left: 0;
    }
    .simulator-viewfinder-wrapper {
        max-width: 600px;
        margin: 0 auto;
    }
}

/* ==========================================
   8. フッター
   ========================================== */

/* About直下・中央配置の「↑ TOPへ」ブロック */
.back-to-top-center-wrap {
    background-color: var(--color-dark-ocean);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 50px 0 40px;
}

.back-to-top-center {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--color-accent-teal-bright);
    text-decoration: none;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    opacity: 0.75;
    padding: 14px 40px;
    border: 1px solid rgba(0, 212, 230, 0.25);
    border-radius: 2px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.back-to-top-center::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 212, 230, 0.04);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.back-to-top-center:hover::before {
    transform: scaleX(1);
}

.back-to-top-center:hover {
    opacity: 1;
    border-color: rgba(0, 212, 230, 0.55);
    box-shadow: 0 0 20px rgba(0, 212, 230, 0.12);
    transform: translateY(-2px);
    letter-spacing: 0.35em;
}

.main-footer {
    background-color: var(--color-dark-ocean);
    padding: 60px 0;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.copyright {
    font-size: 0.7rem;
    color: var(--color-text-muted-light);
    letter-spacing: 0.1em;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    font-weight: 600;
    opacity: 0.6;
    transition: var(--transition-smooth);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-accent-teal-bright);
}

/* フッターの「↑ TOPへ」 - 目立つエメラルドカラーで明確に差別化 */
.back-to-top-footer {
    color: var(--color-accent-teal-bright) !important;
    opacity: 0.85 !important;
    padding-left: 20px;
    border-left: 1px solid rgba(255, 255, 255, 0.12);
    margin-left: 10px;
    letter-spacing: 0.18em;
    transition: var(--transition-smooth);
}

.back-to-top-footer:hover {
    opacity: 1 !important;
    transform: translateY(-2px);
    text-shadow: 0 0 12px rgba(0, 212, 230, 0.5);
}

/* ==========================================
   9. フローティング AI チャットウィジェット
   ========================================== */
.ai-widget-container {
    display: none !important; /* 一時的に非表示 */
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

/* 丸ボタン */
.ai-trigger {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--color-pure-white);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--color-text-dark);
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    outline: none;
}

.ai-trigger:hover {
    transform: scale(1.05) translateY(-2px);
    background-color: var(--color-accent-teal-bright);
    color: var(--color-text-dark);
    box-shadow: 0 15px 35px rgba(0, 212, 230, 0.3);
}

.ai-trigger svg {
    width: 26px;
    height: 26px;
}

.hidden {
    display: none !important;
}

/* チャットウィンドウ */
.ai-window {
    position: absolute;
    bottom: 75px;
    right: 0;
    width: 360px;
    height: 480px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    animation: fade-in-scale 0.3s cubic-bezier(0.165, 0.84, 0.44, 1) forwards;
}

@keyframes fade-in-scale {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.ai-window-header {
    background: rgba(1, 10, 17, 0.85);
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.ai-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-accent-teal-bright);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-accent-teal-bright);
    animation: pulse-glow 1.5s infinite;
}

.status-text {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--color-text-light);
}

.ai-desc {
    font-size: 0.65rem;
    color: var(--color-text-muted-light);
    margin-top: 4px;
}

.ai-viewport {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
    background: rgba(1, 10, 17, 0.95);
}

.ai-viewport::-webkit-scrollbar {
    width: 3px;
}
.ai-viewport::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
}

.ai-message {
    display: flex;
    flex-direction: column;
}

.ai-message.system {
    align-items: center;
    font-size: 0.6rem;
    color: var(--color-text-muted-light);
    letter-spacing: 0.1em;
}

.ai-message.miu .message-bubble {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--color-text-light);
    border-bottom-left-radius: 0;
    align-self: flex-start;
}

.ai-message.user .message-bubble {
    background: var(--color-accent-teal);
    color: var(--color-text-light);
    border-bottom-right-radius: 0;
    align-self: flex-end;
}

.message-bubble {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.8rem;
    line-height: 1.5;
    max-width: 85%;
}

.ai-input-area {
    display: flex;
    background: rgba(1, 10, 17, 0.95);
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 15px;
    gap: 10px;
}

.ai-input-area input {
    flex-grow: 1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-text-light);
    padding: 10px 14px;
    font-size: 0.8rem;
    border-radius: 6px;
    outline: none;
    transition: var(--transition-smooth);
}

.ai-input-area input:focus {
    border-color: var(--color-accent-teal);
    background: rgba(255, 255, 255, 0.08);
}

.ai-send-btn {
    background: var(--color-accent-teal);
    border: none;
    color: var(--color-text-light);
    width: 36px;
    height: 36px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.ai-send-btn:hover {
    background: var(--color-accent-teal-bright);
    color: var(--color-text-dark);
}

.ai-send-btn svg {
    width: 16px;
    height: 16px;
}

/* ==========================================
   10. シネマティック・ライトボックス (モーダル)
   ========================================== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(1, 10, 17, 0.97);
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox-content {
    position: relative;
    width: 92%;
    max-width: 1150px;
    height: 82vh;
    background-color: var(--color-dark-ocean);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.8);
    animation: zoom-in 0.4s cubic-bezier(0.165, 0.84, 0.44, 1) forwards;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-text-light);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition-smooth);
}

.lightbox-close:hover {
    border-color: var(--color-pure-white);
    color: var(--color-pure-white);
    transform: scale(1.1);
}

.lightbox-body {
    display: grid;
    grid-template-columns: 1fr 400px;
    height: 100%;
}

.lightbox-img-wrapper {
    background-color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    overflow: hidden;
}

.lightbox-img-wrapper img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.lightbox-sidebar {
    height: 100%;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 35px;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    overflow-y: auto;
}

.lightbox-loc-tag {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--color-accent-teal-bright);
    letter-spacing: 0.15em;
    display: flex;
    align-items: center;
    gap: 6px;
}

.lightbox-header h2 {
    font-size: 2.2rem;
    color: var(--color-text-light);
    margin-top: 15px;
    line-height: 1.2;
}

.lightbox-description h3 {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--color-text-muted-light);
    letter-spacing: 0.2em;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
    margin-bottom: 15px;
}

.lightbox-description p {
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--color-text-muted-light);
    font-weight: 300;
}

/* ==========================================
   11. レスポンシブ対応
   ========================================== */
@media (max-width: 1100px) {
    .nav-bar {
        padding: 20px 30px;
    }
    .nav-bar.scrolled {
        padding: 15px 30px;
    }
    .hero-section {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding-top: 130px;
        padding-bottom: 80px;
        padding-left: 16px;
        padding-right: 16px;
        height: auto;
        min-height: 100vh;
        gap: 40px;
        overflow-x: hidden;
        width: 100%;
        box-sizing: border-box;
    }
    .hero-content {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        text-align: center;
        padding: 24px 18px;
        margin: 0;
        word-break: break-word;
        overflow-wrap: break-word;
    }
    .hero-art-frame-container {
        margin-top: 20px;
    }
    .hero-art-frame {
        transform: none;
        width: 320px;
        height: 430px;
    }
    .hero-art-frame:hover {
        transform: scale(1.02);
    }
    .hero-title {
        font-size: clamp(1.4rem, 5vw, 2.4rem);
        letter-spacing: 0.03em;
    }
    .section-title {
        font-size: clamp(1.6rem, 7vw, 2.2rem) !important;
        letter-spacing: 0.02em !important;
        word-break: break-word !important;
        overflow-wrap: break-word !important;
    }
    .book-card {
        display: flex !important;
        flex-direction: column !important;
        gap: 40px;
        padding-bottom: 80px;
    }
    .book-card:nth-child(even) {
        display: flex !important;
        flex-direction: column !important;
    }
    .book-card .book-cover-container,
    .book-card:nth-child(even) .book-cover-container {
        grid-column: auto !important;
        grid-row: auto !important;
        max-width: 450px;
        margin: 0 auto;
    }
    .book-card .book-info,
    .book-card:nth-child(even) .book-info {
        grid-column: auto !important;
        grid-row: auto !important;
        padding-right: 0 !important;
        padding-left: 0 !important;
    }

    .book-cover-container {
        max-width: 450px;
        margin: 0 auto;
    }
    /* モバイル・タブレットでの3Dカバーめくり＆自動ファンアウト表示 */
    .book-cover-container:hover .book-cover-wrapper,
    .book-cover-container.fanned .book-cover-wrapper {
        transform: rotateY(-35deg) translateZ(30px) scale(0.96) !important;
        box-shadow: -10px 20px 35px rgba(0, 0, 0, 0.4) !important;
    }
    .book-cover-container:hover .preview-page,
    .book-cover-container.fanned .preview-page {
        opacity: 1 !important;
    }

    /* モバイルでは3Dファンアウトの飛び出し幅を小さく調整 */
    .book-cover-container:hover .preview-page.page-1,
    .book-cover-container.fanned .preview-page.page-1 {
        transform: rotate(5deg) translateX(30px) scale(0.98) !important;
    }
    .book-cover-container:hover .preview-page.page-2,
    .book-cover-container.fanned .preview-page.page-2 {
        transform: rotate(-3deg) translateX(60px) scale(0.95) !important;
    }
    .book-cover-container:hover .preview-page.page-3,
    .book-cover-container.fanned .preview-page.page-3 {
        transform: rotate(8deg) translateX(90px) scale(0.92) !important;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .about-text {
        padding-right: 0;
    }
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .gallery-item:nth-child(even) {
        margin-top: 0;
    }
    .lightbox-body {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr auto;
    }
    .lightbox-sidebar {
        border-left: none;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding: 30px;
        height: auto;
    }
}

@media (max-width: 768px) {
    /* モバイル・タブレットにおけるヘッダーナビゲーションの窮屈さを解消する最適化 */
    .nav-bar, .nav-bar.scrolled {
        padding: 10px 15px;
        width: 100%;
        box-sizing: border-box;
    }
    
    .nav-left-container {
        gap: 10px;
    }
    
    .signature-logo {
        height: 28px; /* さらに小さくしてはみ出しを防ぐ */
    }
    
    .nav-box-split {
        height: 14px;
        margin: 0 2px;
    }
    
    .nav-connect-box {
        gap: 8px;
    }
    
    .nav-link-icon {
        flex-direction: row;
        padding: 2px;
        gap: 0;
    }
    
    .nav-link-icon svg {
        width: 17px;
        height: 17px;
    }
    
    /* 下部の窮屈なテキストラベルを非表示にしてアイコンのみの洗練された表示に */
    .icon-label {
        display: none !important;
    }
    
    .lang-selector {
        gap: 8px;
        padding: 3px 8px;
    }
    
    .lang-btn {
        font-size: 0.6rem;
        padding: 1px 3px;
    }
    
    .nav-links {
        display: none !important; /* モバイル時はナビゲーションリンクを非表示 */
    }
}

@media (max-width: 600px) {
    .hero-title {
        font-size: clamp(1.3rem, 5.5vw, 2.0rem);
        letter-spacing: 0.02em;
    }
    .btn-secondary {
        margin-left: 0;
        margin-top: 15px;
    }
    .hero-cta {
        display: flex;
        flex-direction: column;
    }
    .social-container {
        justify-content: flex-start;
        padding: 0 20px;
        gap: 15px;
    }
    .ai-window {
        width: 300px;
        right: -10px;
    }
}

/* ==========================================
   iPhone 専用（430px以下）
   ========================================== */
@media (max-width: 430px) {
    .hero-section {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding-top: 110px;
        padding-left: 12px;
        padding-right: 12px;
        gap: 30px;
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
        box-sizing: border-box;
    }
    .hero-content {
        padding: 20px 14px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .hero-title {
        font-size: clamp(1.15rem, 6.2vw, 1.65rem);
        letter-spacing: 0.01em;
        line-height: 1.3;
        word-break: break-word;
        overflow-wrap: break-word;
    }
    .hero-subtitle {
        font-size: 0.6rem;
        letter-spacing: 0.2em;
    }
    .hero-desc {
        font-size: 0.78rem;
        line-height: 1.75;
        word-break: break-word;
        overflow-wrap: break-word;
    }
    .btn {
        font-size: 0.65rem;
        padding: 14px 20px;
        width: 100%;
        box-sizing: border-box;
    }
    .hero-cta {
        gap: 10px;
        width: 100%;
    }
    
    /* モバイル向けに最新ニュースセクションを縦並びにして、はみ出しを防ぐ */
    .hero-news {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 10px;
        width: 100%;
    }
    .news-tag {
        margin: 0 auto;
    }
    .news-text {
        font-size: 0.72rem;
        text-align: center;
        width: 100%;
        word-break: break-word;
    }
    
    /* プレミアムリンクを縦並びにして、はみ出しを確実に防止 */
    .hero-quick-links {
        flex-direction: column;
        gap: 12px;
        width: 100%;
    }
    .quick-link-item.premium-cta-link {
        width: 100%;
        justify-content: center;
        box-sizing: border-box;
        font-size: 0.6rem;
        padding: 12px 14px;
    }
    
    .nav-logo {
        font-size: 0.9rem;
    }
    
    /* ========================
       PUBLICATIONS (書籍) セクション iPhone 修正
       ======================== */
    .books-section .section-title {
        font-size: clamp(1.3rem, 6vw, 1.8rem) !important;
    }
    .book-card,
    .book-card:nth-child(even) {
        display: flex !important;
        flex-direction: column !important;
        gap: 20px !important;
        padding-bottom: 50px !important;
    }
    .book-card .book-cover-container,
    .book-card:nth-child(even) .book-cover-container {
        grid-column: auto !important;
        grid-row: auto !important;
        width: 100% !important;
        max-width: 280px !important;
        margin: 0 auto !important;
    }
    .book-card .book-info,
    .book-card:nth-child(even) .book-info {
        grid-column: auto !important;
        grid-row: auto !important;
        padding: 0 !important;
        width: 100% !important;
        text-align: center !important;
    }
    .book-title {
        font-size: clamp(1.3rem, 6vw, 1.9rem) !important;
        margin-bottom: 12px !important;
    }
    .book-desc {
        font-size: 0.82rem !important;
        margin-bottom: 20px !important;
    }
    .book-footer {
        flex-direction: column !important;
        align-items: center !important;
        gap: 14px !important;
    }
    .btn-buy {
        width: 100% !important;
        justify-content: center !important;
        text-align: center !important;
        box-sizing: border-box !important;
        font-size: 0.68rem !important;
        padding: 13px 20px !important;
    }
    .book-price {
        font-size: 1.1rem !important;
    }
}

/* PC用スライドショーとモバイル用カルーセルの初期表示制御 */
.desktop-only-slideshow {
    display: block;
}
.mobile-only-carousel {
    display: none;
}

/* ============================================================
   モバイル専用 スティッキーボトムナビゲーション
   ============================================================ */
.mobile-bottom-nav {
    display: none; /* デスクトップでは非表示 */
}

@media (max-width: 768px) {
    /* ボディ下部にボトムナビ分の余白 */
    body {
        padding-bottom: 70px;
    }

    .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: 62px;
        background: rgba(1, 10, 17, 0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        z-index: 1000;
        justify-content: space-around;
        align-items: center;
        padding: 0 4px;
        box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.4);
    }

    .mob-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 4px;
        flex: 1;
        text-decoration: none;
        color: rgba(255, 255, 255, 0.38);
        font-family: var(--font-sans);
        font-size: 0.52rem;
        font-weight: 600;
        letter-spacing: 0.08em;
        padding: 6px 2px;
        transition: color 0.25s ease;
        -webkit-tap-highlight-color: transparent;
    }

    .mob-nav-item svg,
    .mob-nav-item i {
        width: 20px;
        height: 20px;
        transition: color 0.25s ease, transform 0.25s ease;
    }

    .mob-nav-item.active {
        color: var(--color-accent-teal-bright);
    }

    .mob-nav-item.active svg,
    .mob-nav-item.active i {
        transform: translateY(-2px);
    }

    .mob-nav-item:active {
        color: var(--color-accent-teal-bright);
        transform: scale(0.92);
    }

    /* ============================================================
       モバイルTOPページ（ヒーローセクション）の大幅強化
       ============================================================ */

    /* ヒーローを縦2段に再構成: 上＝アートフレーム写真, 下＝テキスト */
    .hero-section {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: flex-start !important;
        padding: 0 !important;
        gap: 0 !important;
        height: auto !important;
        min-height: 100vh !important;
        overflow-x: hidden !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    /* アートフレームコンテナをヒーロー上部に全幅表示 */
    .hero-art-frame-container {
        order: -1;   /* テキストより先に表示 */
        width: 100% !important;
        display: flex !important;
        justify-content: center !important;
        align-items: flex-end !important;
        margin-top: 50px !important; /* ナビバー分の余白（調整済み） */
        margin-bottom: 0 !important;
        animation: fade-in-right 1.8s cubic-bezier(0.165, 0.84, 0.44, 1) forwards !important;
        padding: 0 16px !important;
        box-sizing: border-box !important;
    }

    /* デスクトップ用スライドショーを非表示にし、モバイル用カルーセルを表示 */
    .desktop-only-slideshow {
        display: none !important;
    }
    .mobile-only-carousel {
        display: flex !important;
    }

    /* ヒーローカルーセルラッパー */
    .hero-carousel-wrapper {
        position: relative;
        width: 100%;
        max-width: 340px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    /* 横スクロールコンテナ */
    .hero-art-frame-carousel {
        display: flex !important;
        overflow-x: auto !important;
        scroll-snap-type: x mandatory !important;
        scroll-behavior: smooth;
        width: 100% !important;
        gap: 15px !important;
        padding: 5px 0 15px !important;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    
    .hero-art-frame-carousel::-webkit-scrollbar {
        display: none;
    }

    /* 各スライド（本１冊分） */
    .carousel-slide {
        flex: 0 0 100% !important;
        scroll-snap-align: center !important;
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        cursor: pointer;
    }

    /* アートフレーム: 3D角度をフラットに、全幅で美しく表示 */
    .carousel-slide .hero-art-frame {
        width: 100% !important;
        max-width: 290px !important;
        height: 380px !important;
        transform: none !important;
        animation: none !important;
        background-size: cover;
        background-position: center;
        border-radius: 4px;
        box-shadow: 
            0 15px 45px rgba(0, 0, 0, 0.6),
            0 0 0 1px rgba(255, 255, 255, 0.08) !important;
        transition: transform 0.25s ease;
    }

    .carousel-slide:active .hero-art-frame {
        transform: scale(0.96) !important;
    }

    /* インジケータードット */
    .carousel-dots {
        display: flex !important;
        gap: 6px;
        justify-content: center;
        align-items: center;
        margin-top: 2px;
    }

    .carousel-dots .dot {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background-color: rgba(255, 255, 255, 0.25);
        transition: all 0.3s ease;
        cursor: pointer;
    }

    .carousel-dots .dot.active {
        background-color: var(--color-accent-teal-bright);
        width: 14px;
        border-radius: 3px;
    }

    /* テキストエリア: フレームの下に続く */
    .hero-content {
        order: 0;
        width: 100% !important;
        max-width: 100% !important;
        padding: 28px 20px 24px !important;
        margin: 0 !important;
        box-sizing: border-box !important;
        text-align: center !important;
        word-break: break-word !important;
        overflow-wrap: break-word !important;
        background: rgba(1, 10, 17, 0.75) !important;
        backdrop-filter: blur(16px) !important;
        -webkit-backdrop-filter: blur(16px) !important;
        border-top: 1px solid rgba(255, 255, 255, 0.06) !important;
        border-bottom: none !important;
        border-left: none !important;
        border-right: none !important;
    }

    /* タイトル */
    .hero-title {
        font-size: clamp(1.35rem, 7vw, 2rem) !important;
        letter-spacing: 0.02em !important;
        line-height: 1.25 !important;
        word-break: break-word !important;
        overflow-wrap: break-word !important;
        margin-bottom: 12px !important;
    }

    .hero-subtitle {
        font-size: 0.55rem !important;
        letter-spacing: 0.25em !important;
        margin-bottom: 10px !important;
        color: var(--color-accent-teal-bright) !important;
    }

    /* 説明文を短くスッキリ */
    .hero-desc {
        font-size: 0.76rem !important;
        line-height: 1.7 !important;
        word-break: break-word !important;
        margin-bottom: 20px !important;
    }

    /* CTAボタン群 */
    .hero-cta {
        display: flex !important;
        flex-direction: column !important;
        gap: 9px !important;
        width: 100% !important;
        margin-bottom: 20px !important;
    }

    .btn {
        font-size: 0.65rem !important;
        padding: 13px 20px !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    /* WHAT'S NEWパネル */
    .hero-news {
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
        gap: 8px !important;
        width: 100% !important;
    }

    .news-tag {
        margin: 0 auto !important;
    }

    .news-text {
        font-size: 0.71rem !important;
        text-align: center !important;
        width: 100% !important;
        word-break: break-word !important;
    }

    /* プレミアムリンク */
    .hero-quick-links {
        flex-direction: column !important;
        gap: 10px !important;
        width: 100% !important;
    }

    .quick-link-item.premium-cta-link {
        width: 100% !important;
        justify-content: center !important;
        box-sizing: border-box !important;
        font-size: 0.62rem !important;
        padding: 12px 14px !important;
    }

    /* スクロールインジケーターはモバイルで非表示（フッターナビがあるので不要） */
    .scroll-indicator {
        display: none !important;
    }

    /* ============================================================
       ソーシャルリンクバーのモバイル最適化 (アイコンをシンプルに横並び)
       ============================================================ */
    .social-bar {
        padding: 24px 0 !important;
        background-color: var(--color-pure-white) !important;
    }
    .social-container {
        justify-content: center !important;
        gap: 35px !important;
        padding: 0 15px !important;
        flex-wrap: nowrap !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }
    .social-item {
        gap: 0 !important;
    }
    .social-item span {
        display: none !important; /* テキストを非表示にしてアイコンのみにする */
    }
    .social-item svg {
        width: 22px !important;
        height: 22px !important;
        opacity: 0.85 !important;
        color: var(--color-text-dark) !important;
    }
}

/* ============================================================
   新刊・準備中用ステータスバッジ (高級感のあるティール/ゴールド系)
   ============================================================ */
.book-status-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: linear-gradient(135deg, var(--color-accent-teal), #00e5f5);
    color: #010a11;
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    padding: 5px 12px;
    border-radius: 2px;
    z-index: 5;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
    text-transform: uppercase;
    border: 1px solid rgba(255, 255, 255, 0.15);
    animation: pulse-glow 2s infinite alternate;
}

@keyframes pulse-glow {
    0% {
        box-shadow: 0 6px 15px rgba(0, 229, 245, 0.2);
    }
    100% {
        box-shadow: 0 6px 25px rgba(0, 229, 245, 0.5);
    }
}