/* 読書専用スタイルシート */

body {
    background-color: #fcfaf5; /* 集中力を高めるためのわずかに暗い紙色 */
    overflow: hidden; /* 全体スクロールを殺して、ビューワー内スクロールにする */
}

.novel-page-wrapper {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

/* 導入オーバーレイ */
#novel-intro-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: #fcfaf5; /* ページ背景と同じ色 */
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 1s ease;
}

.intro-content {
    text-align: center;
    max-width: 500px;
    padding: 20px;
}

#novel-intro-overlay .action-label {
    writing-mode: horizontal-tb;
    -webkit-writing-mode: horizontal-tb;
    display: block;
    margin: 0 auto 40px;
}

.recommendation-album-large {
    background: #f0f0f0;
    padding: 40px 20px;
    border: 1px solid #e0e0e0;
    margin: 40px 0;
    border-radius: 2px;
}

.album-link-large {
    font-size: 14px;
    color: var(--ink);
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 0.3em;
    border-bottom: 1px solid var(--ink);
    display: inline-block;
    margin-top: 15px;
}

.operation-guide {
    margin-bottom: 50px;
}

.guide-title {
    font-size: 11px;
    color: var(--accent);
    letter-spacing: 0.2em;
    margin-bottom: 20px;
}

.guide-items {
    display: flex;
    justify-content: center;
    gap: 40px;
}

.guide-item {
    font-size: 10px;
    color: #888;
    line-height: 1.6;
}

.guide-item .icon {
    display: block;
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--ink);
}

.btn-start-reading {
    background: var(--ink);
    color: #fff;
    border: none;
    padding: 15px 60px;
    font-family: 'Shippori Mincho', serif;
    font-size: 14px;
    letter-spacing: 0.2em;
    cursor: pointer;
    transition: 0.3s;
}
.btn-start-reading:hover { background: var(--accent); }

/* 上部コントロール */
.novel-top-nav {
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 30px;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    background: rgba(252, 250, 245, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
}

.nav-link {
    text-decoration: none;
    color: #666;
    font-size: 11px;
    letter-spacing: 0.15em;
    transition: 0.3s;
    border-bottom: 1px solid transparent;
}

.nav-link:hover {
    color: #000;
    border-bottom: 1px solid #000;
}

/* メインビューワー：ここが縦書きの核心 */
.novel-viewer {
    flex: 1;
    overflow-x: auto;
    overflow-y: hidden;
    display: flex;
    flex-direction: row;
    direction: rtl; /* スクロールの初期位置を右端（開始地点）に強制する */
    padding: 60px 0;
    -webkit-overflow-scrolling: touch;
}

.novel-content {
    writing-mode: vertical-rl; /* 縦書き・右から左 */
    -webkit-writing-mode: vertical-rl;
    text-orientation: mixed;
    direction: ltr; /* 本文内の文字や記号が反転しないよう、通常の並びに戻す */
    display: block;
    text-align: start; /* 行内での上揃えを保証 */
    height: 100%;
    max-height: 80vh; /* 画面の高さに合わせつつ、一行が長くなりすぎないよう調整 */
    padding: 0 80px; /* 冒頭と末尾に十分な余白を確保 */
}

.novel-header {
    margin-left: 120px;
}

.novel-title {
    font-size: 32px;
    margin: 0 0 20px 0;
    line-height: 1.5;
    font-weight: 700;
}

.action-label {
    writing-mode: vertical-rl;
    -webkit-writing-mode: vertical-rl;
    display: inline-block;
    font-size: 10px;
    color: var(--accent);
    letter-spacing: 0.2em;
    margin-left: 25px; /* 縦書き時の隣の要素（タイトル）との間隔 */
}

.novel-subtitle {
    font-size: 15px;
    color: #888;
}

.novel-text {
    font-size: 18px;
    line-height: 2.4;
    letter-spacing: 0.08em;
}

.novel-text p {
    margin-left: 2em; /* 縦書きの「行の下」の余白 */
}

/* 下部ナビゲーション */
.novel-footer-nav {
    height: 80px;
    border-top: 1px solid rgba(0,0,0,0.05);
    background: rgba(252, 250, 245, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.nav-container {
    display: flex;
    gap: 80px;
}

.page-btn {
    text-decoration: none;
    color: #000;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    letter-spacing: 0.3em;
    opacity: 0.4;
    transition: all 0.5s ease;
}

.page-btn:hover {
    opacity: 1;
    transform: translateY(-3px);
}

.btn-arrow { font-size: 18px; font-weight: 300; }

/* スマートフォン向けの調整 */
@media (max-width: 768px) {
    .novel-viewer {
        padding: 40px 0;
    }
    .novel-text {
        font-size: 17px;
        line-height: 2.2;
    }
    .novel-header { margin-left: 60px; }
    .novel-top-nav { padding: 0 15px; }
}