/* Manga Studio System - Premium Design Tokens */
:root {
  --bg: #000000;
  --surface: #121414;
  --surface-elevated: #1e2020;
  --surface-raised: var(--surface-elevated);
  --panel-glass: rgba(255, 255, 255, 0.05);
  --panel-border: rgba(255, 255, 255, 0.1);
  --accent: #6dd3df;
  --accent-dim: #005a62;
  --text: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.6);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --blur: blur(24px);
  --shadow-xl: 0 40px 100px rgba(0, 0, 0, 0.6);
  font-family: 'Inter', 'Noto Sans JP', system-ui, sans-serif;
}

/* ── Themes (20 total) ───────────────────────────────────────────────────── */

/* Dark group */
.theme-dark-blue    { --bg:#0f172a; --surface:#1e293b; --surface-elevated:#293548; --text:#f8fafc; --text-secondary:#94a3b8; --panel-glass:rgba(255,255,255,.05); --panel-border:rgba(255,255,255,.12); }
.theme-dark-purple  { --bg:#130d1f; --surface:#1d1230; --surface-elevated:#261842; --text:#f0e8ff; --text-secondary:#a78bfa; --panel-glass:rgba(167,139,250,.08); --panel-border:rgba(167,139,250,.2); }
.theme-dark-green   { --bg:#0a1f0d; --surface:#112216; --surface-elevated:#18301f; --text:#e8f5ea; --text-secondary:#86efac; --panel-glass:rgba(134,239,172,.06); --panel-border:rgba(134,239,172,.15); }
.theme-dark-red     { --bg:#1a0a0a; --surface:#2a0f0f; --surface-elevated:#3a1515; --text:#fff0f0; --text-secondary:#f87171; --panel-glass:rgba(248,113,113,.06); --panel-border:rgba(248,113,113,.2); }
.theme-charcoal     { --bg:#1a1a1a; --surface:#242424; --surface-elevated:#2e2e2e; --text:#e8e8e8; --text-secondary:#a0a0a0; --panel-glass:rgba(255,255,255,.05); --panel-border:rgba(255,255,255,.12); }
.theme-midnight     { --bg:#090f1a; --surface:#0f1929; --surface-elevated:#162035; --text:#c9d5ef; --text-secondary:#6b82ab; --panel-glass:rgba(107,130,171,.08); --panel-border:rgba(107,130,171,.2); }
.theme-nord         { --bg:#2e3440; --surface:#3b4252; --surface-elevated:#434c5e; --text:#eceff4; --text-secondary:#d8dee9; --panel-glass:rgba(236,239,244,.05); --panel-border:rgba(236,239,244,.12); }
.theme-dracula      { --bg:#282a36; --surface:#323444; --surface-elevated:#3d4055; --text:#f8f8f2; --text-secondary:#bd93f9; --panel-glass:rgba(189,147,249,.07); --panel-border:rgba(189,147,249,.2); }
.theme-tokyo-night  { --bg:#1a1b26; --surface:#24283b; --surface-elevated:#2e3248; --text:#c0caf5; --text-secondary:#787c99; --panel-glass:rgba(192,202,245,.06); --panel-border:rgba(122,130,200,.25); }
.theme-solarized-dark { --bg:#002b36; --surface:#073642; --surface-elevated:#0f4455; --text:#fdf6e3; --text-secondary:#93a1a1; --panel-glass:rgba(255,255,255,.05); --panel-border:rgba(255,255,255,.12); }
.theme-catppuccin   { --bg:#1e1e2e; --surface:#313244; --surface-elevated:#3d3f5c; --text:#cdd6f4; --text-secondary:#a6adc8; --panel-glass:rgba(205,214,244,.05); --panel-border:rgba(205,214,244,.15); }
.theme-gruvbox      { --bg:#282828; --surface:#3c3836; --surface-elevated:#504945; --text:#ebdbb2; --text-secondary:#a89984; --panel-glass:rgba(235,219,178,.05); --panel-border:rgba(235,219,178,.15); }

/* Light group — MUST use dark text */
.theme-light     { --bg:#f8fafc; --surface:#ffffff; --surface-elevated:#f1f5f9; --text:#0f172a; --text-secondary:#475569; --panel-glass:rgba(0,0,0,.03); --panel-border:rgba(0,0,0,.1); }
.theme-sepia     { --bg:#f4ecd8; --surface:#fdf6e3; --surface-elevated:#ede6cc; --text:#3d2b1f; --text-secondary:#7c6455; --panel-glass:rgba(0,0,0,.03); --panel-border:rgba(0,0,0,.1); }
.theme-warm-light { --bg:#fef9f0; --surface:#fffcf7; --surface-elevated:#f5ede0; --text:#2d1f0e; --text-secondary:#7a5c40; --panel-glass:rgba(0,0,0,.03); --panel-border:rgba(0,0,0,.1); }
.theme-paper     { --bg:#f5f0e8; --surface:#faf7f2; --surface-elevated:#ede7da; --text:#2b2520; --text-secondary:#7a6e60; --panel-glass:rgba(0,0,0,.03); --panel-border:rgba(0,0,0,.1); }
.theme-cool-light { --bg:#f0f4ff; --surface:#f8faff; --surface-elevated:#e4eaf8; --text:#1e2a4a; --text-secondary:#4c6096; --panel-glass:rgba(0,0,0,.03); --panel-border:rgba(100,120,200,.2); }
.theme-mint      { --bg:#f0faf4; --surface:#f8fffc; --surface-elevated:#ddf5e8; --text:#0d2b1a; --text-secondary:#3a7255; --panel-glass:rgba(0,0,0,.03); --panel-border:rgba(0,100,60,.15); }
.theme-solarized { --bg:#fdf6e3; --surface:#eee8d5; --surface-elevated:#ddd8c0; --text:#073642; --text-secondary:#586e75; --panel-glass:rgba(0,0,0,.04); --panel-border:rgba(0,0,0,.12); }

/* ── Momiji (maple) themes — autumn / Japanese aesthetic ──────────────── */
.theme-momiji-dark  { --bg:#1a0f0a; --surface:#2a1610; --surface-elevated:#3a1f17; --text:#fef3c7; --text-secondary:#d6a78a; --panel-glass:rgba(251,146,60,.06); --panel-border:rgba(251,146,60,.15); }
.theme-momiji-light { --bg:#fdf3e3; --surface:#fffaf0; --surface-elevated:#f7e5c8; --text:#451a03; --text-secondary:#9a3412; --panel-glass:rgba(180,83,9,.04); --panel-border:rgba(180,83,9,.18); }

/* Accents */
.accent-gold    { --accent: #fbbf24; }
.accent-violet  { --accent: #a78bfa; }
.accent-sakura  { --accent: #f472b6; }
.accent-green   { --accent: #4ade80; }
.accent-momiji  { --accent: #f97316; }
.accent-momiji-deep { --accent: #c2410c; }

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text); overflow: hidden; -webkit-font-smoothing: antialiased;
  /* Web版で追加(DESIGN_GATE §3-4 日本語組版): 和文の字間つめ(palt)と禁則処理。
     line-height 1.7〜1.9 は本文プロース向けの基準であり、本アプリはツールバー/
     サムネイルグリッド主体の高密度なアプリシェルUIのため、各コンポーネントは
     用途に応じた行送り(1.1〜1.5)を個別に指定している(全体に1.7を強制すると
     ボタン・ナビ・グリッドのレイアウトが崩れるため据え置き)。 */
  font-feature-settings: "palt";
  line-break: strict;
  overflow-wrap: break-word;
}

/* Layout Fixes */
.app-shell { display: flex; height: 100vh; width: 100vw; background: var(--bg); overflow: hidden; color: var(--text); }

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  min-width: 0;
  background-color: transparent;
  background-image:
    var(--bg-pattern, none),
    radial-gradient(circle at 50% 0%, rgba(109, 211, 223, 0.05), transparent);
  background-attachment: fixed, fixed;
  height: 100vh; /* Ensure fixed height */
}

/* Custom background image + highlight overlay layers */
.mc-bg-image, .mc-bg-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.mc-bg-image {
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
/* Ensure main-content children paint above bg layers */
.main-content > .header,
.main-content > .gallery,
.main-content > .book-content-area,
.main-content > .empty-state,
.main-content > .viewer-container,
.main-content > .book-table {
  position: relative;
  z-index: 1;
}
.main-content > footer,
.main-content > .status-bar {
  position: relative;
  z-index: 5;
  flex-shrink: 0;
}

/* Viewer zoom badge */
.viewer-zoom-badge {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.15);
  pointer-events: none;
  z-index: 50;
  white-space: nowrap;
}

/* Viewer - Ensure images fit perfectly */
.viewer-container {
  flex: 1;
  background: #000;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.viewer-floating-controls {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 45;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
}
.viewer-floating-controls.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.viewer-floating-controls--fullscreen {
  position: fixed;
  top: max(14px, env(safe-area-inset-top));
  right: max(14px, env(safe-area-inset-right));
  z-index: 3030;
}
.viewer-orientation-btn {
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 12px;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 999px;
  background: rgba(0,0,0,0.68);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 28px rgba(0,0,0,0.45);
  cursor: pointer;
}
.viewer-orientation-btn:active {
  transform: scale(0.98);
}

.viewer-main {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 20px;
  min-height: 0;
}

.viewer-page, .spread-page {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  box-shadow: 0 0 40px rgba(0,0,0,0.5);
  user-select: none;
}

.spread-page { width: 50%; max-width: 50%; }

.viewer-image-shell {
  position: relative;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 0;
}

.viewer-image-shell--spread {
  width: 50%;
  max-width: 50%;
}

.viewer-image-shell--spread .spread-page {
  width: 100%;
  max-width: 100%;
}

.viewer-media,
.viewer-media-placeholder {
  width: min(100%, 1180px);
  height: min(100%, 720px);
  max-width: 100%;
  max-height: 100%;
  border-radius: 6px;
  background: #000;
  box-shadow: 0 0 40px rgba(0,0,0,0.5);
}
.viewer-media-shell {
  width: min(100%, 1180px);
  height: min(100%, 760px);
  max-width: 100%;
  max-height: 100%;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 10px;
}
.viewer-media-shell .viewer-media {
  width: 100%;
  height: 100%;
  min-height: 0;
}
.viewer-media-video {
  object-fit: contain;
  display: block;
}
.viewer-media-placeholder {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 12px;
  color: rgba(255,255,255,0.72);
  border: 1px solid rgba(255,255,255,0.12);
}
.viewer-media-placeholder span {
  max-width: min(72vw, 720px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 800;
}

.viewer-media-placeholder strong {
  font-size: 15px;
  font-weight: 900;
}
.viewer-audio-shell {
  width: min(92vw, 680px);
  min-height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 28px;
  border-radius: 8px;
  background: linear-gradient(160deg, rgba(20,184,166,0.18), rgba(0,0,0,0.82));
  color: #fff;
  box-shadow: 0 20px 60px rgba(0,0,0,0.55);
  border: 1px solid rgba(255,255,255,0.14);
}
.viewer-audio-shell--fs {
  width: min(92vw, 760px);
}
.viewer-audio-title {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 16px;
  font-weight: 900;
}
.viewer-media-audio {
  width: 100%;
}
.media-controls {
  width: 100%;
  min-height: 52px;
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) auto;
  align-items: stretch;
  gap: 8px;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.16);
  background: rgba(0,0,0,0.82);
  color: #fff;
  box-shadow: 0 14px 42px rgba(0,0,0,0.42);
}
.media-controls-primary,
.media-timeline,
.media-controls-secondary {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.media-timeline { flex: 1; }
.media-controls-secondary { justify-content: flex-end; }
.media-control-btn {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.08);
  color: #fff;
  cursor: pointer;
}
.media-control-btn:hover {
  background: rgba(255,255,255,0.16);
}
.media-time {
  min-width: 42px;
  font-size: 12px;
  font-weight: 800;
  color: rgba(255,255,255,0.78);
  font-variant-numeric: tabular-nums;
  text-align: center;
}
.media-seek,
.media-volume {
  width: 100%;
  min-width: 0;
}
.media-seek { flex: 1; }
.media-volume { width: 92px; flex: 0 1 92px; }
.media-track-select {
  min-width: 104px;
  max-width: 180px;
  height: 36px;
  padding: 0 28px 0 9px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 12px;
  font-weight: 750;
  text-overflow: ellipsis;
}
.media-track-select option { color: #111; background: #fff; }
.media-compat-btn {
  min-height: 36px;
  padding: 0 12px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
  white-space: nowrap;
  cursor: pointer;
}
.media-compat-btn:disabled {
  opacity: 0.58;
  cursor: default;
}
.viewer-media-shell:fullscreen {
  width: 100vw;
  height: 100vh;
  padding: max(10px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right)) max(10px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left));
  border-radius: 0;
  background: #000;
}

/* Document / PDF iframe viewer */
.viewer-iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: none;
  background: #fff;
  display: block;
}
.viewer-iframe--fs {
  position: relative;
  width: 100%; height: 100%;
  max-width: 900px;
  margin: auto;
  display: block;
}

/* ── Range input — unified grey style ───────────────────── */
input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
}
input[type=range]::-webkit-slider-runnable-track {
  background: var(--panel-border);
  height: 4px;
  border-radius: 2px;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text-secondary);
  margin-top: -5px;
  cursor: pointer;
  transition: background 0.15s;
}
input[type=range]::-webkit-slider-thumb:hover { background: var(--text); }
input[type=range]:focus { outline: none; }

/* View Modes */
.gallery {
  flex: 1;
  overflow-y: auto;
  padding: 32px;
  display: grid;
  gap: 32px;
  align-content: start;
}

.gallery.view-grid {
  display: grid;
  /* Columns are handled via inline style in main.tsx for dynamic resizing */
}
.gallery.view-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 12px 18px;
}

.gallery.view-list .book-card {
  flex-direction: row;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: transparent;
  border-radius: 0;
  border: 0;
  border-bottom: 1px solid var(--panel-border);
  box-shadow: none;
  min-height: 62px;
  width: 100%;
}
.gallery.view-list .book-card:hover {
  transform: none;
  background: var(--surface);
}

.gallery.view-list .book-cover-wrapper {
  width: 42px;
  height: 56px;
  min-width: 42px;
  aspect-ratio: unset;
  flex-shrink: 0;
  border-radius: 4px;
}
.gallery.view-list .book-info {
  flex: 1;
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(180px, 1.2fr) minmax(240px, 2fr);
  align-items: center;
  gap: 14px;
}
.gallery.view-list .book-info h3 {
  font-size: 14px;
  text-align: left;
  margin: 0;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.book-list-meta {
  display: none;
}
.gallery.view-list .book-list-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  margin: 0;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.2;
  white-space: nowrap;
}
.gallery.view-list .book-list-meta span {
  flex-shrink: 0;
}
.gallery.view-list .book-list-path {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ページ(本の中の1枚1枚)のリスト表示。フォルダの.book-cardとは別要素
   (.page-thumb-item)のため専用ルールが必要(会長要望・2026-08-05: どの階層でも
   表示形式を切り替え可能に)。 */
.gallery.view-list .page-thumb-item {
  flex-direction: row;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--panel-border);
  border-radius: 0;
}
.gallery.view-list .page-thumb-item:hover {
  opacity: 1;
  background: var(--surface);
}
.gallery.view-list .page-thumb-wrapper {
  width: 42px;
  height: 56px;
  aspect-ratio: unset;
  flex-shrink: 0;
}
.gallery.view-list .page-info {
  flex: 1;
  text-align: left;
  font-size: 13px;
  min-width: 0;
}

/* Bookshelf View (SideBooks Style) */
.gallery.view-bookshelf {
  display: grid;
  gap: 0;
  padding: 20px;
  background: #3d2b1f url('https://www.transparenttextures.com/patterns/wood-pattern.png');
  background-attachment: local;
}

.gallery.view-bookshelf .book-card {
  padding: 24px 12px;
  border-bottom: 24px solid rgba(0,0,0,0.4);
  background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.1));
  position: relative;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.gallery.view-bookshelf .book-cover-wrapper {
  box-shadow: 5px 5px 15px rgba(0,0,0,0.6);
  transform: perspective(1000px) rotateY(-5deg);
  transition: transform 0.3s;
}

.gallery.view-bookshelf .book-card:hover .book-cover-wrapper {
  transform: perspective(1000px) rotateY(0deg) scale(1.05);
}

/* Finder-style table view for the library */
.book-table {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  margin: 12px;
  overflow: hidden;
}
.book-table-header {
  display: grid;
  grid-template-columns: 32px 56px 1fr 90px 90px 120px;
  align-items: center;
  padding: 0;
  background: var(--surface-elevated);
  border-bottom: 1px solid var(--panel-border);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.book-table-body {
  display: flex;
  flex-direction: column;
}
.book-table-row {
  display: grid;
  grid-template-columns: 32px 56px 1fr 90px 90px 120px;
  align-items: center;
  border-bottom: 1px solid var(--panel-border);
  cursor: pointer;
  transition: background 0.08s;
  min-height: 44px;
}
.book-table-row:last-child { border-bottom: none; }
.book-table-row:hover { background: var(--surface-hover); }
.book-table-row.item-selected { background: rgba(94,234,212,0.12); }
.book-table-row.item-selected:hover { background: rgba(94,234,212,0.18); }
.bt-cell {
  padding: 8px 10px;
  font-size: 13px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
}
.bt-col-check { padding: 0; justify-content: center; }
.bt-col-check .item-check-box {
  width: 18px; height: 18px; border-radius: 4px;
  border: 1px solid var(--panel-border); background: var(--surface);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.bt-col-check .item-check-box.checked { background: var(--accent); color: #000; border-color: var(--accent); }
.bt-col-thumb { padding: 4px 6px; }
.bt-col-thumb img {
  width: 40px; height: 56px;
  object-fit: cover;
  border-radius: 3px;
  background: #000;
}
.bt-thumb-placeholder {
  width: 40px; height: 56px;
  display: grid; place-items: center;
  background: var(--surface-elevated);
  border-radius: 3px;
  color: var(--panel-border);
}
.bt-col-name {
  white-space: nowrap;
  text-overflow: ellipsis;
  min-width: 0;
}
.bt-name-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
  flex: 1;
}
.bt-col-pages, .bt-col-fmt, .bt-col-date {
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
  font-size: 12px;
}
.bt-col-fmt { text-transform: uppercase; font-weight: 600; }
.bt-badge {
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 700;
  margin-left: 4px;
  flex-shrink: 0;
}
.bt-badge-sub { background: rgba(251,191,36,0.2); color: #fbbf24; }
.book-table input {
  background: var(--surface-elevated);
  border: 1px solid var(--accent);
  border-radius: 3px;
  padding: 4px 8px;
  color: var(--text);
  font-size: 13px;
  width: 100%;
}

/* Page Thumbnails (Inside a book) */
.page-thumb-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  transition: opacity 0.2s;
}
.page-thumb-item:hover { opacity: 0.8; }

.page-thumb-wrapper {
  position: relative;
  aspect-ratio: 3/4;
  background: var(--surface-elevated);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--panel-border);
}
.page-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-thumb-doc {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--text-secondary);
}
.page-thumb-media {
  gap: 8px;
  color: var(--accent);
}
.page-thumb-video {
  background:
    linear-gradient(145deg, rgba(59,130,246,0.18), rgba(15,23,42,0.7)),
    var(--surface-elevated);
}
.page-thumb-audio {
  background:
    linear-gradient(145deg, rgba(20,184,166,0.2), rgba(15,23,42,0.72)),
    var(--surface-elevated);
}
.page-thumb-ext {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.page-num-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
}
.page-info {
  font-size: 11px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
}

/* Numbering Mode Overlay */
.numbering-badge {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.18);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 32px;
  font-weight: 900;
  color: var(--numbering-color, #f97316);
  text-shadow: 0 2px 8px rgba(0,0,0,0.6);
  border: 4px solid var(--numbering-color, #f97316);
  z-index: 50;
}
.numbering-badge--unset {
  background: rgba(0,0,0,0.28);
  color: rgba(255,255,255,0.45);
  border-color: rgba(255,255,255,0.2);
}

/* DnD reorder visuals for numbering mode */
.page-thumb-item { position: relative; }
.page-thumb-item.num-dragging {
  opacity: 0.4;
  transform: scale(0.96);
  transition: opacity 0.12s, transform 0.12s;
}
/* Vertical insertion-line on the LEFT of drop target */
.page-thumb-item.num-drag-over::before {
  content: '';
  position: absolute;
  top: -4px;
  bottom: -4px;
  left: -8px;
  width: 4px;
  background: var(--numbering-color, #f97316);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--numbering-color, #f97316);
  z-index: 100;
  pointer-events: none;
}
.page-thumb-item[draggable="true"] { cursor: grab; }
.page-thumb-item[draggable="true"]:active { cursor: grabbing; }
.page-thumb-item.num-dragging { cursor: grabbing; }

/* Numbering popup menu (anchored to the toolbar button) */
.numbering-popup {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 280px;
  background: var(--surface-elevated);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl, 0 12px 32px rgba(0,0,0,0.5));
  padding: 8px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.popup-section-label {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 600;
  padding: 4px 8px 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.popup-submode-toggle {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.popup-submode-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  white-space: nowrap;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.popup-submode-btn:hover { background: var(--surface-hover); }
.popup-submode-btn.active {
  background: var(--numbering-color, #f97316);
  color: #000;
  font-weight: 700;
  border-color: var(--numbering-color, #f97316);
}
.popup-hint {
  font-size: 11px;
  color: var(--text-secondary);
  padding: 6px 10px;
  line-height: 1.5;
}
.popup-divider { height: 1px; background: var(--panel-border); margin: 4px 0; }
.popup-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  text-align: left;
  white-space: nowrap;
  width: 100%;
}
.popup-item:hover:not(:disabled) { background: var(--surface-hover); }
.popup-item:disabled { opacity: 0.4; cursor: not-allowed; }
.popup-item--primary { background: var(--accent); color: #000; font-weight: 700; }
.popup-item--primary:hover:not(:disabled) { filter: brightness(1.08); background: var(--accent); }
.popup-item--danger { color: #ef4444; }
.popup-item--danger:hover { background: rgba(239,68,68,0.12); }

/* UI Components */
.sidebar {
  width: 240px;
  background: var(--surface);
  border-right: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  padding: 62px 0 10px;
  z-index: 100;
  position: relative;
  overflow: hidden;
  transition: width 0.2s ease;
  flex-shrink: 0;
}
.sidebar.collapsed { width: 60px; }
/* スマホ幅ハンバーガーメニュー・ドロワー背景(会長要望・2026-08-06:
   スマホ最適化)。デスクトップでは常に非表示、@media側で表示に切り替える。 */
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
  border: none;
  background: transparent;
  color: var(--text);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
}
.mobile-menu-btn:hover { background: var(--panel-glass); }
.sidebar-backdrop { display: none; }
.sidebar.collapsed .nav-label,
.sidebar.collapsed .nav-title,
.sidebar.collapsed .nav-title-row .nav-title,
.sidebar.collapsed .shelf-count,
.sidebar.collapsed .add-popup-hint,
.sidebar.collapsed .nav-icon-btn { display: none; }
.sidebar.collapsed .nav-item { justify-content: center; padding-left: 0; padding-right: 0; }
.sidebar.collapsed .nav-title-row { justify-content: center; }

.sidebar-toggle-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 44px;
  height: 44px;
  min-height: 44px;
  min-width: 44px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: var(--surface-elevated);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 200;
}

/* ── Momiji sidebar decoration (themes: momiji-dark / momiji-light only) ──
   Subtle scattered maple-leaf silhouettes as a watermark behind sidebar content.
   Hand-authored vector SVG shape (a filled <path>, not a Unicode emoji glyph)
   so it renders identically on every platform and satisfies the design
   system's "no decorative emoji" hard constraint while keeping the brand's
   maple-leaf (紅葉/momiji) motif. */
.app-shell.theme-momiji-dark .sidebar::before,
.app-shell.theme-momiji-light .sidebar::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200' width='200' height='200'><g fill='%23f97316'><path d='M16 2C16 2 13 7 11 9.5C8.5 8.5 5 10 5 13C5 15.5 8 16.5 8 16.5C6 18.5 5 21.5 7 22.5C8.5 23.2 10 22 11 21C11 23 12 26 12 28L16 27L20 28C20 26 21 23 21 21C22 22 23.5 23.2 25 22.5C27 21.5 26 18.5 24 16.5C24 16.5 27 15.5 27 13C27 10 23.5 8.5 21 9.5C19 7 16 2 16 2Z' transform='translate(24 62) rotate(-15 16 16) scale(1.6)'/><path d='M16 2C16 2 13 7 11 9.5C8.5 8.5 5 10 5 13C5 15.5 8 16.5 8 16.5C6 18.5 5 21.5 7 22.5C8.5 23.2 10 22 11 21C11 23 12 26 12 28L16 27L20 28C20 26 21 23 21 21C22 22 23.5 23.2 25 22.5C27 21.5 26 18.5 24 16.5C24 16.5 27 15.5 27 13C27 10 23.5 8.5 21 9.5C19 7 16 2 16 2Z' transform='translate(134 150) rotate(28 16 16) scale(1.15)'/></g></svg>"),
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 280 280' width='280' height='280'><g fill='%23f97316'><path d='M16 2C16 2 13 7 11 9.5C8.5 8.5 5 10 5 13C5 15.5 8 16.5 8 16.5C6 18.5 5 21.5 7 22.5C8.5 23.2 10 22 11 21C11 23 12 26 12 28L16 27L20 28C20 26 21 23 21 21C22 22 23.5 23.2 25 22.5C27 21.5 26 18.5 24 16.5C24 16.5 27 15.5 27 13C27 10 23.5 8.5 21 9.5C19 7 16 2 16 2Z' transform='translate(74 136) rotate(45 16 16) scale(1.35)'/><path d='M16 2C16 2 13 7 11 9.5C8.5 8.5 5 10 5 13C5 15.5 8 16.5 8 16.5C6 18.5 5 21.5 7 22.5C8.5 23.2 10 22 11 21C11 23 12 26 12 28L16 27L20 28C20 26 21 23 21 21C22 22 23.5 23.2 25 22.5C27 21.5 26 18.5 24 16.5C24 16.5 27 15.5 27 13C27 10 23.5 8.5 21 9.5C19 7 16 2 16 2Z' transform='translate(204 46) rotate(-8 16 16) scale(0.95)'/></g></svg>");
  background-repeat: repeat;
  background-position: 0 0, 80px 60px;
  background-size: 200px 200px, 280px 280px;
  opacity: 0.22;
  mix-blend-mode: normal;
}

/* Dark theme: dim them more so they don't overpower */
.app-shell.theme-momiji-dark .sidebar::before { opacity: 0.18; }
/* Light theme: a touch more visible */
.app-shell.theme-momiji-light .sidebar::before { opacity: 0.28; }

/* Sidebar content must sit above the decoration layer */
.sidebar > * { position: relative; z-index: 1; }

.nav-group { padding: 0 10px; margin-bottom: 10px; }
.nav-title { padding: 0 10px; margin-bottom: 4px; font-size: 10px; font-weight: 700; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 1px; }

.nav-item {
  width: 100%;
  padding: 7px 10px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  text-align: left;
}
.nav-item:hover { background: var(--panel-glass); }
.nav-item.active { background: var(--accent); color: #000; }
.sidebar-shortcuts {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--panel-border);
}
.nav-item--shortcut {
  padding-right: 6px;
}
.nav-inline-remove {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-inline-remove:hover {
  background: rgba(239,68,68,0.15);
  color: #ef4444;
}
/* 本/サブフォルダをドラッグしてこの本棚の上に乗せている間のドロップ先強調
   (会長要望・2026-08-05: ドラッグ&ドロップで本棚へ追加できるように)。 */
.nav-item--drop-target {
  outline: 2px dashed var(--accent);
  outline-offset: -2px;
  background: var(--panel-glass);
}

.hud-btn {
  width: 32px;
  height: 32px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid var(--panel-border);
  background: var(--panel-glass);
  color: var(--text);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.hud-btn:hover { background: var(--panel-border); border-color: var(--accent); }
.hud-btn.active { background: var(--accent); color: #000; border-color: var(--accent); }

.search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel-glass);
  border: 1px solid var(--panel-border);
  padding: 8px 16px;
  border-radius: 100px;
  width: 300px;
}
.search-bar input { background: transparent; border: none; color: var(--text); outline: none; width: 100%; font-size: 14px; }

.book-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  gap: 12px;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.book-card:hover { transform: translateY(-4px); }
.book-cover-wrapper { position: relative; border-radius: var(--radius-md); overflow: hidden; aspect-ratio: 3/4; background: var(--surface-elevated); box-shadow: 0 10px 30px rgba(0,0,0,0.3); }
.book-cover { width: 100%; height: 100%; object-fit: cover; }
.book-badge { position: absolute; bottom: 8px; right: 8px; background: rgba(0,0,0,0.7); padding: 2px 8px; border-radius: 4px; font-size: 10px; font-weight: 700; backdrop-filter: blur(4px); }
.book-sub-badge { position: absolute; bottom: 8px; left: 8px; background: var(--accent); color: #000; padding: 2px 7px; border-radius: 4px; font-size: 10px; font-weight: 800; backdrop-filter: blur(4px); letter-spacing: 0.02em; }
.book-format-badge { position: absolute; bottom: 8px; left: 8px; background: rgba(0,0,0,0.72); color: var(--accent); padding: 2px 6px; border-radius: 4px; font-size: 9px; font-weight: 800; letter-spacing: 0.08em; backdrop-filter: blur(4px); border: 1px solid rgba(255,255,255,0.12); }
/* min-width:0 は flex/grid アイテムのデフォルト(min-width:auto)を解除する
   ために必須。無いと子h3のoverflow:hidden/ellipsisが効かず、長い書籍名が
   カード幅を超えてはみ出る(会長指摘・2026-08-05)。 */
.book-info { min-width: 0; }
.book-info h3 { margin: 0; font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.85); display: flex; justify-content: center; align-items: center; z-index: 1000; }
.modal-content { background: var(--surface); width: 500px; max-width: 92vw; max-height: 90vh; border-radius: var(--radius-lg); border: 1px solid var(--panel-border); overflow: hidden; box-shadow: var(--shadow-xl); display: flex; flex-direction: column; }
.modal-header { padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--panel-border); flex-shrink: 0; }
.modal-body { padding: 24px; display: flex; flex-direction: column; gap: 20px; overflow-y: auto; flex: 1; min-height: 0; }

/* Settings modal: sidebar tabs + scrollable panel */
.settings-modal { width: 820px; height: 620px; max-width: 95vw; max-height: 90vh; }
.settings-body { flex: 1; display: flex; min-height: 0; overflow: hidden; }
.settings-sidebar {
  width: 170px;
  flex-shrink: 0;
  background: var(--surface-elevated);
  border-right: 1px solid var(--panel-border);
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
}
.settings-tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  text-align: left;
  white-space: nowrap;
  transition: background 0.08s, color 0.08s;
}
.settings-tab-btn:hover { background: var(--surface-hover); }
.settings-tab-btn.active {
  background: var(--accent);
  color: #000;
  font-weight: 700;
}
.settings-panel {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.reader-settings-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  background: var(--surface-elevated);
}
.reader-setting-row {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.reader-setting-row > span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 700;
}
.reader-setting-options {
  display: inline-flex;
  gap: 3px;
  padding: 3px;
  border-radius: 9px;
  background: var(--bg);
  border: 1px solid var(--panel-border);
}
.reader-setting-options button {
  min-width: 54px;
  min-height: 36px;
  padding: 0 12px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 800;
  cursor: pointer;
}
.reader-setting-options button.active {
  background: var(--accent);
  color: #000;
}

/* Settings: section labels and visual pickers */
.settings-section-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

/* Theme picker: card grid with mini-preview */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
}
.theme-swatch {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 6px;
  background: transparent;
  border: 2px solid var(--panel-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.12s;
}
.theme-swatch:hover { border-color: var(--text-secondary); }
.theme-swatch.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent) inset;
}
.theme-swatch-preview {
  position: relative;
  width: 100%;
  height: 64px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid;
}
.theme-swatch-side {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 22%;
}
.theme-swatch-card {
  position: absolute;
  left: 30%;
  right: 8%;
  top: 14%;
  bottom: 14%;
  border-radius: 3px;
  border: 1px solid;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  padding: 4px;
}
.theme-swatch-line {
  height: 2px;
  border-radius: 1px;
}
.theme-swatch-accent {
  position: absolute;
  left: 6%;
  right: 6%;
  bottom: 6%;
  height: 3px;
  border-radius: 2px;
  opacity: 0.85;
}
.theme-swatch-label {
  font-size: 11px;
  color: var(--text);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Accent picker */
.accent-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 8px;
}
.accent-swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  background: transparent;
  border: 2px solid var(--panel-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.12s;
}
.accent-swatch:hover { border-color: var(--text-secondary); }
.accent-swatch.active {
  border-color: var(--accent);
  background: var(--surface-elevated);
}
.accent-swatch-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.15);
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}
.accent-swatch-label {
  font-size: 11px;
  color: var(--text);
}

/* Pattern picker */
.pattern-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 8px;
}
.pattern-swatch {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 6px;
  background: transparent;
  border: 2px solid var(--panel-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.12s;
}
.pattern-swatch:hover { border-color: var(--text-secondary); }
.pattern-swatch.active { border-color: var(--accent); }
.pattern-swatch-preview {
  height: 48px;
  border-radius: 4px;
  border: 1px solid var(--panel-border);
  background-color: var(--bg);
  overflow: hidden;
}
.pattern-swatch-label {
  font-size: 11px;
  color: var(--text);
  text-align: center;
}

/* ── Settings sidebar spacer ── */
.settings-sidebar-spacer {
  flex: 1;
  min-height: 12px;
}

/* ── Language grid ── */
.lang-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.lang-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 6px;
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
}
.lang-btn:hover { border-color: var(--text-secondary); background: var(--panel-hover); }
.lang-btn.active { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }
.lang-btn-name { font-size: 12px; color: var(--text); font-weight: 500; }
.lang-btn-code { font-size: 9px; color: var(--text-secondary); font-family: monospace; }

/* ── Plan grid ── */
.plan-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.plan-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
}
.plan-card--current { border-color: var(--accent); }
.plan-card--highlight { border-color: color-mix(in srgb, var(--accent) 60%, transparent); }
.plan-card-badge {
  position: absolute;
  top: -1px; right: 10px;
  background: var(--accent);
  color: #000;
  font-size: 9px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 0 0 6px 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.plan-card-name { font-size: 13px; font-weight: 600; color: var(--text); }
.plan-card-price { font-size: 20px; font-weight: 700; color: var(--accent); line-height: 1.1; }
.plan-card-price span { font-size: 12px; font-weight: 400; color: var(--text-secondary); }
.plan-card-desc { font-size: 11px; color: var(--text-secondary); flex: 1; }
.plan-card-btn {
  display: block;
  width: 100%;
  padding: 6px 10px;
  font-size: 11px;
  background: var(--surface-raised);
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: background 0.12s, border-color 0.12s;
}
.plan-card-btn:hover:not(:disabled) { background: var(--panel-hover); border-color: var(--text-secondary); }
.plan-card-btn:disabled { opacity: 0.5; cursor: default; }
.plan-card-btn--accent {
  background: var(--accent);
  color: #000;
  border-color: transparent;
  font-weight: 600;
}
.plan-card-btn--accent:hover:not(:disabled) { filter: brightness(1.1); }
.plan-card-btn--donate { border-color: #ef4444; color: #ef4444; }
.plan-card-btn--donate:hover:not(:disabled) { background: rgba(239,68,68,0.08); }
.plan-grid--3col { grid-template-columns: repeat(3, 1fr); }
.plan-feature-list {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
}
.plan-feature-list li {
  font-size: 11px;
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
  line-height: 1.4;
}
.plan-feature-list li::before { position: absolute; left: 0; font-size: 10px; }
.plan-feature-list li.ok { color: var(--text); }
.plan-feature-list li.ok::before { content: '✓'; color: var(--accent); }
.plan-feature-list li.ng::before { content: '✗'; color: var(--text-secondary); }
.plan-donate-box {
  padding: 14px;
  background: var(--surface);
  border: 1px dashed var(--panel-border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.plan-donate-title { font-size: 13px; font-weight: 600; color: var(--text); }
.plan-donate-desc { font-size: 11px; color: var(--text-secondary); }

.billing-status-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  padding: 12px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 86%, transparent);
}
.billing-status-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}
.billing-status-desc {
  margin-top: 3px;
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.5;
}
.billing-status-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

/* ── Auth form ── */
.auth-signed-in {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.auth-user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
}
.auth-user-avatar { font-size: 28px; }
.auth-user-email { font-size: 13px; font-weight: 500; color: var(--text); }
.auth-user-plan { font-size: 11px; color: var(--text-secondary); }
.auth-form { display: flex; flex-direction: column; gap: 8px; }
.auth-tabs { display: flex; gap: 4px; margin-bottom: 4px; }
.auth-tab-btn {
  flex: 1;
  min-height: 44px;
  padding: 6px;
  font-size: 12px;
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.12s;
  box-sizing: border-box;
}
.auth-tab-btn.active { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }
.auth-input {
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.12s;
}
.auth-input:focus { border-color: var(--accent); }
.auth-divider {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-secondary);
}
.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--panel-border);
}
.auth-google-btn {
  background: var(--surface-elevated) !important;
  border: 1px solid var(--panel-border) !important;
}
.auth-provider-btn {
  background: var(--surface-elevated) !important;
  border: 1px solid var(--panel-border) !important;
  color: var(--text) !important;
}
.auth-form .plan-card-btn {
  min-height: 44px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
}

.support-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 640px;
}

.support-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 700;
}

.support-field .auth-input {
  width: 100%;
}

@media (max-width: 760px) {
  .plan-grid,
  .plan-grid--3col {
    grid-template-columns: 1fr;
  }
  .billing-status-box {
    align-items: stretch;
    flex-direction: column;
  }
  .billing-status-actions {
    justify-content: stretch;
  }
  .billing-status-actions .plan-card-btn {
    flex: 1 1 0;
  }
}

.support-textarea {
  min-height: 160px;
  resize: vertical;
  line-height: 1.55;
}
.auth-switch {
  display: flex;
  gap: 12px;
  font-size: 11px;
  flex-wrap: wrap;
}
.auth-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
}
.auth-link:hover { opacity: 0.8; }
.auth-message {
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
}
.auth-message--ok { background: rgba(34,197,94,0.1); color: #22c55e; border: 1px solid rgba(34,197,94,0.3); }
.auth-message--err { background: rgba(239,68,68,0.1); color: #ef4444; border: 1px solid rgba(239,68,68,0.3); }

/* ── Format list in Library settings ── */
.format-list-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.format-group { display: flex; flex-direction: column; gap: 4px; }
.format-group-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.format-tags { display: flex; flex-wrap: wrap; gap: 4px; }
.format-tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  font-size: 11px;
  color: var(--text);
  font-family: monospace;
}
.format-tag--note {
  font-family: inherit;
  color: var(--text-secondary);
  font-style: italic;
  border-style: dashed;
}

/* Narrow-window responsive: sidebar becomes horizontal tabs
   (全社標準ブレークポイント768pxに合わせて調整。旧値720px) */
@media (max-width: 768px) {
  .settings-modal { height: auto; }
  .settings-body { flex-direction: column; }
  .settings-sidebar {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 8px;
    border-right: none;
    border-bottom: 1px solid var(--panel-border);
  }
  .settings-tab-btn { flex-shrink: 0; padding: 8px 12px; }
  .settings-panel { padding: 16px; }

  /* サイドバーをオーバーレイのドロワーに切り替える(会長要望・2026-08-06:
     スマホ最適化)。デスクトップの折りたたみ(.collapsed)とは独立した挙動。 */
  .mobile-menu-btn { display: flex; }
  .sidebar-toggle-btn { display: none; }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: min(80vw, 300px);
    padding: 10px 0;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: 4px 0 24px rgba(0,0,0,0.4);
  }
  .sidebar.collapsed { width: min(80vw, 300px); }
  .sidebar.collapsed .nav-label,
  .sidebar.collapsed .nav-title,
  .sidebar.collapsed .nav-title-row .nav-title,
  .sidebar.collapsed .shelf-count,
  .sidebar.collapsed .add-popup-hint,
  .sidebar.collapsed .nav-icon-btn { display: initial; }
  .sidebar.collapsed .nav-item { justify-content: flex-start; padding-left: 10px; padding-right: 10px; }
  .sidebar.collapsed .nav-title-row { justify-content: space-between; }
  .sidebar.mobile-open { transform: translateX(0); }
  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
  }

  /* ツールバー: 折り返し可能にし、アイコンボタン類をDESIGN_GATE基準の
     タップターゲット44x44pxまで拡大する(会長要望・2026-08-06)。 */
  .header {
    display: grid;
    grid-template-columns: 44px auto minmax(0, 1fr);
    align-items: center;
    height: auto;
    min-height: 48px;
    padding: 6px 10px 8px;
    gap: 6px;
    overflow: hidden;
  }
  .main-content { width: 100vw; }
  .mobile-menu-btn { grid-column: 1; grid-row: 1; }
  .header-nav-controls {
    grid-column: 2;
    grid-row: 1;
    margin-right: 0;
    gap: 5px;
  }
  .mode-tabs {
    grid-column: 3;
    grid-row: 1;
    min-width: 0;
    max-width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .mode-tabs::-webkit-scrollbar { display: none; }
  .header-tools {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    margin-left: 0 !important;
    overflow: visible;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding-bottom: 0;
    scrollbar-width: none;
  }
  .header-tools::-webkit-scrollbar { display: none; }
  .header-tools > div[style*="width: 1px"] { display: none !important; }
  .hud-btn { width: 44px; height: 44px; }
  .nav-btn { width: 44px; height: 44px; }
  .mode-tab {
    padding: 10px 12px;
    min-height: 44px;
    max-width: 44vw;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .sort-select {
    flex: 1 1 150px;
    min-width: 0;
    max-width: calc(50% - 4px);
    height: 44px;
    padding: 0 10px;
    font-size: 13px;
  }
  .header-size-slider {
    flex: 1 1 168px;
    min-width: 0;
    min-height: 44px;
    padding: 0 10px;
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-sm);
    background: var(--surface-elevated);
  }
  .header-size-slider input[type=range] {
    flex: 1;
    min-width: 52px;
    width: auto;
  }
  .header-size-value { min-width: 34px; text-align: right; }
  .header-search-box {
    order: -100;
    flex: 1 0 100%;
    width: 100%;
    min-width: 0;
    height: 44px;
  }
  .header-search-box input { font-size: 14px; }
  .header-search-clear { width: 32px; height: 32px; }
  .status-bar { height: 34px; padding: 0 10px; font-size: 11px; }
  .status-left { gap: 8px; }
  .status-location,
  .status-detail { gap: 5px; }
  .status-detail { max-width: 46%; }
  .search-popup {
    position: fixed;
    top: 56px;
    left: 10px;
    right: 10px;
    min-width: 0;
    width: auto;
  }

  /* 本棚グリッド/リストのモバイル調整。リスト表示は一列リストとして維持する。 */
  .gallery { padding: 14px; gap: 14px; }
  .gallery.view-grid { grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)) !important; gap: 12px; }
  .gallery.view-list { display: flex !important; flex-direction: column; gap: 0; padding: 8px 10px; }
  .gallery.view-list .book-card { flex-direction: row; align-items: center; padding: 8px 6px; min-height: 58px; }
  .gallery.view-list .book-cover-wrapper { width: 38px; height: 50px; min-width: 38px; aspect-ratio: unset; }
  .gallery.view-list .book-info { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .gallery.view-list .book-list-meta { font-size: 11px; gap: 8px; }
  .gallery.view-list .book-list-path { display: none; }
  .gallery.view-list .page-thumb-wrapper { width: 38px; height: 50px; }
  .gallery.view-list .page-thumb-item { min-height: 58px; padding: 8px 6px; }
  .favorites-board { padding: 16px 14px 28px; gap: 22px; }
  .favorites-card-grid { grid-template-columns: repeat(auto-fill, minmax(128px, 1fr)); gap: 14px; }
  .favorite-card-meta { font-size: 10px; }
  .book-table { margin: 8px; overflow-x: auto; border-radius: var(--radius-sm); }
  .book-table-header,
  .book-table-row { grid-template-columns: 32px 48px minmax(160px, 1fr) 58px 70px 94px; min-width: 520px; }

  /* タップターゲット44x44px監査(タスク#12・DESIGN_GATE基準)。
     マウスhover前提だったサイドバー項目・ビューアHUD・コンテキストメニュー・
     複数選択チェックボックスをスマホでも押しやすい大きさへ。 */
  .nav-item { min-height: 44px; padding: 10px 12px; }
  .nav-icon-btn { width: 44px; height: 44px; }
  .sb-btn { width: 44px; height: 44px; }
  .context-menu-item { min-height: 44px; padding: 10px 14px; }
  .context-menu-item--nested { min-height: 40px; }
  .item-checkbox { padding: 10px; top: -4px; left: -4px; opacity: 1; }
}
.control-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.control-row > label:first-child { white-space: nowrap; flex-shrink: 0; }
.control-select { background: var(--surface-elevated); color: var(--text); border: 1px solid var(--panel-border); padding: 8px 12px; border-radius: var(--radius-sm); outline: none; }

.page-toast { position: fixed; top: 80px; left: 50%; transform: translateX(-50%); background: var(--accent); color: #000; padding: 6px 16px; border-radius: 100px; font-weight: 800; font-size: 13px; opacity: 0; transition: opacity 0.3s; z-index: 500; pointer-events: none; }
.page-toast.active { opacity: 1; }

.viewer-hud {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  height: 56px;
  background: rgba(0,0,0,0.95);
  border-top: 1px solid rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}
.viewer-hud.visible { opacity: 1; pointer-events: auto; }
.hud-controls { display: flex; align-items: center; gap: 8px; width: 100%; max-width: 800px; }

/* Custom tooltip */
.hud-btn[data-tip], .header-tool-btn[data-tip] { position: relative; }
.hud-btn[data-tip]::after, .header-tool-btn[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: #fff;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 9999;
}
.hud-btn[data-tip]:hover::after, .header-tool-btn[data-tip]:hover::after { opacity: 1; }
.header .hud-btn[data-tip]::after, .header .header-tool-btn[data-tip]::after { bottom: auto; top: calc(100% + 6px); }

/* Search popup */
.search-popup {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 8px 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  z-index: 300;
  min-width: 260px;
}
.search-popup input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  outline: none;
  font-size: 14px;
}

.status-toggle { padding: 4px 12px; border-radius: 4px; cursor: pointer; transition: all 0.2s; }
.status-toggle:hover { background: var(--panel-glass); }
.status-toggle.active { color: var(--accent); font-weight: 700; }

.header-tools {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: nowrap;
  flex-shrink: 0;
}
.header-tools .nav-item,
.header-tools .header-tool-btn { white-space: nowrap; flex-shrink: 0; }
.header-divider {
  width: 1px;
  height: 20px;
  background: var(--panel-border);
  margin: 0 4px;
  flex-shrink: 0;
}
.header-search-box {
  order: -20;
  height: 32px;
  width: min(280px, 24vw);
  min-width: 190px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 9px 0 10px;
  background: var(--surface-elevated);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  flex-shrink: 0;
}
.header-search-box.active,
.header-search-box:focus-within {
  border-color: var(--accent);
  color: var(--text);
}
.header-search-box input {
  min-width: 0;
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 13px;
}
.header-search-box input::placeholder { color: var(--text-secondary); }
.header-search-trigger {
  display: none;
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
  color: inherit;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.mobile-search-panel {
  display: none;
}
.header-search-clear {
  width: 24px;
  height: 24px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}
.header-search-clear:hover {
  background: var(--panel-glass);
  color: var(--text);
}

/* Sort dropdown in header */
.sort-select {
  background: var(--surface-elevated);
  color: var(--text);
  border: 1px solid var(--panel-border);
  padding: 0 8px;
  height: 30px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  outline: none;
  cursor: pointer;
}
.sort-select:hover { border-color: var(--accent); }

/* Compact inline size slider in header */
.header-size-slider {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  flex-shrink: 0;
  white-space: nowrap;
}
.header-size-slider input[type=range] {
  width: 100px;
  flex-shrink: 0;
}

/* Prominent version — bordered pill with visible track/thumb + numeric value */
.header-size-slider--prominent {
  height: 30px;
  padding: 0 10px;
  gap: 8px;
  background: var(--panel-glass);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  color: var(--text);
  position: relative;
}
.header-size-slider--prominent:hover { border-color: var(--accent); }
.header-size-slider--prominent input[type=range] {
  width: 110px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: linear-gradient(to right,
    var(--accent) 0%,
    var(--accent) calc((var(--val, 0) - 100) / 3 * 1%),
    var(--panel-border) calc((var(--val, 0) - 100) / 3 * 1%),
    var(--panel-border) 100%);
  background: var(--panel-border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.header-size-slider--prominent input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--surface);
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.4);
}
.header-size-slider--prominent input[type=range]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}
.header-size-slider--prominent .header-size-value {
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
  min-width: 28px;
  text-align: right;
}
.header-size-slider--prominent[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: #fff;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 9999;
}
.header-size-slider--prominent[data-tip]:hover::after { opacity: 1; }

.header-tool-btn {
  height: 30px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--panel-glass);
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.header-tool-btn:hover { background: var(--panel-border); border-color: var(--accent); }
.header-tool-btn.active { background: var(--accent); color: #000; border-color: var(--accent); }

/* Back/forward nav buttons */
.nav-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--panel-border);
  background: var(--panel-glass);
  color: var(--text);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
  flex-shrink: 0;
}
.nav-btn:hover:not(:disabled) { background: var(--panel-border); border-color: var(--accent); }
.nav-btn:disabled { opacity: 0.3; cursor: default; }
.nav-btn[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: #fff;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 9999;
}
.nav-btn[data-tip]:hover:not(:disabled)::after { opacity: 1; }

.header {
  height: 48px;
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  background: var(--surface);
  border-bottom: 1px solid var(--panel-border);
  flex-shrink: 0;
  z-index: 200;
  overflow: visible;
}
.header-nav-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: 12px;
  flex-shrink: 0;
}
/* Push right-side tool group to the far right */
.header > .header-tools,
.header > .hud-btn:last-child {
  margin-left: auto;
}

/* Mode tabs */
.mode-tabs {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--surface-elevated);
  border-radius: var(--radius-sm);
  padding: 3px;
}
.mode-tab {
  padding: 5px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.mode-tab:hover:not(:disabled) { color: var(--text); background: var(--panel-glass); }
.mode-tab.active { background: var(--accent); color: #000; }
.mode-tab:disabled { opacity: 0.3; cursor: default; }
.mode-tab-label--mobile { display: none; }

.status-bar {
  height: 40px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--surface);
  border-top: 1px solid var(--panel-border);
  flex-shrink: 0;
  transition: height 0.15s;
}
.status-left {
  min-width: 0;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
}
.status-location,
.status-detail {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 7px;
}
.status-location {
  flex: 1;
  color: var(--text);
  font-weight: 650;
}
.status-location-text {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.status-detail {
  flex-shrink: 0;
  max-width: 44%;
  color: var(--text-secondary);
  white-space: nowrap;
}
.status-detail span {
  overflow: hidden;
  text-overflow: ellipsis;
}
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 1px 7px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.06em;
  white-space: nowrap;
  flex-shrink: 0;
}
.status-badge--sub { background: var(--accent); color: #000; }
.status-badge--fmt { background: rgba(255,255,255,0.1); color: var(--accent); border: 1px solid rgba(255,255,255,0.15); }

/* Viewer-mode status bar */
.viewer-statusbar {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
}
.sb-btn {
  width: 32px;
  height: 32px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: 1px solid var(--panel-border);
  background: var(--panel-glass);
  color: var(--text);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
  position: relative;
}
.sb-btn:hover { background: var(--panel-border); border-color: var(--accent); }
.sb-btn.active { background: var(--accent); color: #000; border-color: var(--accent); }
.sb-btn[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: #fff;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 9999;
}
.sb-btn[data-tip]:hover::after { opacity: 1; }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ── v7 Architecture Styles ─────────────────────────────── */

.nav-title-row {
  display: flex;
  align-items: center;
  padding: 0 12px;
  margin-bottom: 8px;
}
.nav-title-row .nav-title { flex: 1; margin-bottom: 0; padding: 0; }

.nav-icon-btn {
  width: 24px;
  height: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
}
.nav-icon-btn:hover { background: var(--panel-glass); color: var(--text); }
.nav-icon-btn[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  left: calc(100% + 6px);
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.85);
  color: #fff;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 9999;
}
.nav-icon-btn[data-tip]:hover::after { opacity: 1; }

.shelf-count {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--panel-glass);
  border-radius: 10px;
  padding: 1px 7px;
  min-width: 20px;
  text-align: center;
  flex-shrink: 0;
}
.nav-item.active .shelf-count { color: rgba(0,0,0,0.55); background: rgba(0,0,0,0.15); }

.shelf-inline-form { padding: 4px 12px; }
.shelf-inline-form input {
  width: 100%;
  padding: 6px 10px;
  background: var(--surface-elevated);
  border: 1px solid var(--accent);
  color: var(--text);
  border-radius: var(--radius-sm);
  font-size: 14px;
  outline: none;
}

.add-section { padding: 12px; border-top: 1px solid var(--panel-border); }
.add-section-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0 12px;
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-footer { padding: 6px 8px; border-top: 1px solid var(--panel-border); }

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

/* Context Menu */
.context-menu {
  position: fixed;
  z-index: 2000;
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  padding: 4px;
  min-width: 180px;
  animation: ctx-appear 0.1s ease;
}
@keyframes ctx-appear {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}
.context-menu-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.1s;
  text-align: left;
}
.context-menu-item:hover { background: var(--panel-glass); }
.context-menu-item.danger { color: #ef4444; }
.context-menu-item.danger:hover { background: rgba(239,68,68,0.1); }
.context-menu-item:disabled { opacity: 0.5; cursor: default; }
.context-menu-item:disabled:hover { background: transparent; }
/* 「本棚へ移動」等のインライン展開サブメニュー項目(会長要望・2026-08-06)。 */
.context-menu-item--nested { padding-left: 30px; font-size: 12px; color: var(--text-secondary); }
.context-menu-sep { height: 1px; background: var(--panel-border); margin: 2px 8px; }
.context-menu-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 6px 12px 2px;
}

/* Empty state */
.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 80px 20px;
  color: var(--text-secondary);
  text-align: center;
}
.empty-state p { margin: 0; font-size: 16px; font-weight: 600; color: var(--text); }
.empty-state p + p { font-size: 13px; color: var(--text-secondary); font-weight: 400; }

/* Web版で追加: NASリレー経由のフォルダ探索を待つ間のローディング表示。
   prefers-reduced-motion環境ではグローバルの `animation: none !important`
   (このファイル内で既に定義済み)が自動的にこのspinも無効化する。 */
@keyframes mjv-spin { to { transform: rotate(360deg); } }
.subfolder-loading-icon { animation: mjv-spin 1.2s linear infinite; }

.loading-overlay {
  position: absolute;
  inset: 0;
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 220px;
  padding: 40px 20px;
  background: color-mix(in srgb, var(--bg) 76%, transparent);
  color: var(--text);
  text-align: center;
  pointer-events: none;
  backdrop-filter: blur(4px);
}

.loading-overlay p {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
}

/* Properties modal */
.props-row { display: flex; flex-direction: column; gap: 4px; }
.props-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.props-path {
  font-size: 12px;
  font-family: 'SF Mono', 'Menlo', monospace;
  color: var(--text-secondary);
  word-break: normal;
  overflow-wrap: break-word;
}

/* Add popup */
.add-popup {
  position: absolute;
  bottom: calc(100% + 6px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  padding: 4px;
  min-width: 220px;
  animation: ctx-appear 0.1s ease;
  z-index: 500;
}
.add-popup-hint {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 6px 12px 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Book/page inline rename form */
.book-rename-form { padding: 4px 0; }
.book-rename-form input {
  width: 100%;
  padding: 4px 6px;
  background: var(--surface-elevated);
  border: 1px solid var(--accent);
  color: var(--text);
  border-radius: var(--radius-sm);
  font-size: 13px;
  outline: none;
}

/* Favorite badge on book cover */
.book-fav-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  background: #fbbf24;
  color: #000;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── History Badges ─────────────────────────────────────── */
.book-history-time {
  position: absolute;
  bottom: 32px;
  right: 8px;
  background: rgba(0,0,0,0.72);
  color: var(--text-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 9px;
  font-weight: 600;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.1);
  pointer-events: none;
}
.book-deleted-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0,0,0,0.8);
  color: #ef4444;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}
.book-card--deleted-hist {
  opacity: 0.45;
}

/* ── Fullscreen Viewer Overlay ───────────────────────────── */
.viewer-fullscreen-overlay {
  position: fixed;
  inset: 0;
  z-index: 3000;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}
.vfo-title-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  background: linear-gradient(rgba(0,0,0,0.8), transparent);
  z-index: 3020;
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
}
.viewer-fullscreen-overlay.controls-visible .vfo-title-bar { opacity: 1; pointer-events: auto; }
.vfo-book-name {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}
.vfo-book-name .vfo-subfolder {
  font-weight: 400;
  color: rgba(255,255,255,0.55);
}
.vfo-page-name {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
  white-space: nowrap;
  flex-shrink: 0;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.vfo-images {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3005;
  padding: 0;
}
.vfo-images .viewer-page {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  cursor: pointer;
}
.vfo-images .viewer-media,
.vfo-images .viewer-audio-shell {
  max-width: 100vw;
  max-height: 100vh;
}
.vfo-images .spread-page {
  max-width: 50%;
  max-height: 100%;
  object-fit: contain;
  cursor: pointer;
}
.vfo-hud {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 16px;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
  z-index: 3020;
  opacity: 0;
  transition: opacity 0.25s;
  pointer-events: none;
}
.viewer-fullscreen-overlay.controls-visible .vfo-hud { opacity: 1; pointer-events: auto; }

/* ── Subfolder Navigation ──────────────────────────────────── */
.book-content-area {
  flex: 1;
  position: relative;
  overflow-y: auto;
  min-height: 0;
}
.book-content-area .gallery {
  flex: none;
  overflow-y: visible;
}

.subfolder-section {
  padding: 16px 12px 8px;
}
.subfolder-section-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 8px 12px 12px;
}
.book-card--nested {
  /* identical to library .book-card styling — inherits via .gallery.view-grid > .book-card */
}
.book-card--locked { opacity: 0.45; cursor: not-allowed; filter: grayscale(40%); }
.book-card--locked:hover { transform: none !important; }

/* Favorites page: fixed bookshelf-style sections. */
.favorites-board {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 24px 28px 36px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.favorites-panel {
  min-width: 0;
}
.favorites-section-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 0 0 14px;
}
.favorites-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 28px;
  align-items: start;
}
.favorite-card {
  min-width: 0;
}
.favorite-card .book-cover-wrapper {
  border: 1px solid var(--panel-border);
}
.favorite-cover--icon {
  color: var(--accent);
  background: var(--surface-elevated);
  display: grid;
  place-items: center;
}
.favorite-card-meta {
  margin: 4px 0 0;
  color: var(--text-secondary);
  font-size: 11px;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.favorite-card-remove {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 24px;
  height: 24px;
  border: none;
  border-radius: 999px;
  background: rgba(0,0,0,0.55);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}
.favorite-card-remove:hover {
  background: rgba(239,68,68,0.9);
  color: #fff;
}

.subfolder-grid {
  display: grid;
  gap: 16px;
}

.subfolder-card {
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 16px 12px 12px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}
.subfolder-card:hover {
  background: var(--surface-elevated);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.subfolder-card--archive { border-style: dashed; }
.subfolder-fmt-badge {
  background: rgba(255,255,255,0.1);
  color: var(--accent);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.subfolder-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel-glass);
  border-radius: var(--radius-sm);
  color: var(--accent);
  flex-shrink: 0;
}

.subfolder-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  width: 100%;
}

.subfolder-meta {
  font-size: 11px;
  color: var(--text-secondary);
}

.subfolder-divider {
  border: none;
  border-top: 1px solid var(--panel-border);
  margin-top: 16px;
}

/* ── Cloud Backup Section ──────────────────────────────────── */
.backup-section {
  background: var(--surface-elevated);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 16px;
}
.backup-section-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}
.backup-folder-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}
.backup-folder-path {
  flex: 1;
  font-size: 12px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: monospace;
}
.backup-log {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--panel-border);
}
.backup-log-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.backup-log-entry {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  padding: 2px 0;
}
.backup-log-dot {
  color: #4ade80;
  font-size: 11px;
  flex-shrink: 0;
}

/* ── Restore Confirm Modal ─────────────────────────────────── */
.restore-missing-box {
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.25);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-top: 12px;
}
.restore-missing-title {
  font-size: 13px;
  font-weight: 700;
  color: #ef4444;
  margin-bottom: 8px;
}
.restore-missing-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 180px;
  overflow-y: auto;
}
.restore-missing-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.restore-missing-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
}
.restore-missing-path {
  font-size: 11px;
  color: var(--text-secondary);
  font-family: monospace;
  word-break: normal;
  overflow-wrap: break-word;
}

/* ── Multi-selection ─────────────────────────────────────── */
.item-checkbox {
  position: absolute;
  top: 6px;
  left: 6px;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.15s;
  cursor: pointer;
}
.book-card:hover .item-checkbox,
.page-thumb-item:hover .item-checkbox,
.book-card.item-selected .item-checkbox,
.page-thumb-item.item-selected .item-checkbox {
  opacity: 1;
}
.item-check-box {
  width: 20px;
  height: 20px;
  border-radius: 5px;
  border: 2px solid rgba(255,255,255,0.6);
  background: rgba(0,0,0,0.45);
  display: grid;
  place-items: center;
  backdrop-filter: blur(4px);
  transition: background 0.15s, border-color 0.15s;
}
.item-check-box.checked {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
}
.book-card.item-selected,
.page-thumb-item.item-selected {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.selection-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 4px;
}
.selection-count {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}
.sel-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--panel-border);
  background: var(--surface-elevated);
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
}
.sel-btn:hover { background: var(--surface-hover); }
.sel-btn.danger { color: #ef4444; border-color: #ef444440; }
.sel-btn.danger:hover { background: #ef444418; }

/* Network (SMB/FTP) Modal */
.net-modal { width: 720px; max-width: 92vw; max-height: 86vh; display: flex; flex-direction: column; }
.net-modal .modal-body { overflow-y: auto; }
.net-status { padding: 8px 12px; background: var(--surface-elevated); border-radius: var(--radius-sm); font-size: 12px; color: var(--text-secondary); }
.net-form { display: flex; flex-direction: column; gap: 10px; }
.net-form-title { font-size: 14px; font-weight: 600; padding-bottom: 4px; border-bottom: 1px solid var(--panel-border); }
.net-row { display: grid; grid-template-columns: 110px 1fr; gap: 12px; align-items: center; }
.net-row label { font-size: 12px; color: var(--text-secondary); }
.net-row input, .net-row select {
  padding: 6px 10px; background: var(--surface-elevated); border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm); color: var(--text); font-size: 13px;
}
.net-actions { display: flex; justify-content: flex-end; gap: 8px; padding-top: 8px; border-top: 1px solid var(--panel-border); }
.net-profiles { display: flex; flex-direction: column; gap: 8px; }
.net-profiles-header { display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--text-secondary); }
.net-section { display: flex; flex-direction: column; gap: 6px; }
.net-section-header { display: flex; justify-content: space-between; align-items: center; font-size: 13px; font-weight: 600; color: var(--text); padding: 4px 0; }
.net-section-divider { height: 1px; background: var(--panel-border); margin: 12px 0 8px; }
.net-empty { padding: 24px; text-align: center; color: var(--text-secondary); font-size: 13px; }
.net-profile-card {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px; background: var(--surface-elevated);
  border: 1px solid var(--panel-border); border-radius: var(--radius-md);
  transition: opacity 0.15s, border-color 0.15s;
}
.net-profile-card.is-disconnected { opacity: 0.75; border-color: rgba(251,191,36,0.3); }
.net-profile-card.is-connected { border-color: rgba(74,222,128,0.4); }

.net-status-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  margin-right: 6px; flex-shrink: 0;
}
.net-status-dot.connected { background: #4ade80; box-shadow: 0 0 6px rgba(74,222,128,0.7); }
.net-status-dot.disconnected { background: #6b7280; }
.net-status-badge {
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.net-status-badge.connected { background: rgba(74,222,128,0.2); color: #4ade80; }
.net-status-badge.disconnected { background: rgba(251,191,36,0.18); color: #fbbf24; }
.net-profile-name { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.net-profile-meta { font-size: 11px; color: var(--text-secondary); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.net-type-badge { padding: 2px 6px; border-radius: 4px; font-weight: 700; font-size: 10px; letter-spacing: 0.5px; }
.net-type-smb { background: #3b82f640; color: #93c5fd; }
.net-type-ftp { background: #10b98140; color: #6ee7b7; }
.net-type-ftps { background: #8b5cf640; color: #c4b5fd; }
.net-profile-actions { display: flex; gap: 4px; }
.btn-small { padding: 4px 10px !important; font-size: 12px !important; }
.net-browser { display: flex; flex-direction: column; gap: 6px; }
.net-browser-bar { display: flex; gap: 8px; align-items: center; padding-bottom: 8px; border-bottom: 1px solid var(--panel-border); }
.net-path { flex: 1; font-family: monospace; font-size: 12px; color: var(--text-secondary); padding: 4px 8px; background: var(--surface-elevated); border-radius: var(--radius-sm); overflow: hidden; text-overflow: ellipsis; }
.net-entries { display: flex; flex-direction: column; max-height: 50vh; overflow-y: auto; }
.net-entry {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 10px; border-bottom: 1px solid var(--panel-border-soft, rgba(255,255,255,0.04));
}
.net-entry-name { display: flex; gap: 8px; align-items: center; flex: 1; font-size: 13px; cursor: default; }
.net-entry.is-dir .net-entry-name { cursor: pointer; color: var(--accent); }
.net-entry.is-dir:hover { background: var(--surface-hover); }
.net-entry-up { color: var(--text-secondary); cursor: pointer; font-size: 12px; padding: 4px 10px; }
.net-entry-up:hover { background: var(--surface-hover); }
.net-entry-size { font-size: 10px; color: var(--text-secondary); }
.btn-primary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: var(--radius-sm); border: none;
  background: var(--accent); color: #000; font-size: 13px; font-weight: 600;
  cursor: pointer;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: var(--radius-sm);
  background: var(--surface-elevated); border: 1px solid var(--panel-border); color: var(--text);
  font-size: 13px; cursor: pointer;
}
.btn-secondary:hover { background: var(--surface-hover); }
.btn-secondary:disabled { opacity: 0.5; cursor: not-allowed; }

/* Web版で追加(DESIGN_GATE §3-4): OSの「視差効果を減らす」設定を尊重し、
   ビューアのズームtransition等インラインstyleの遷移も含めて無効化する。 */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* Mobile toolbar final override.
   Keep every requested control reachable on phones; only numbering is hidden. */
@media (max-width: 768px) {
  .header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    height: auto;
    min-height: 48px;
    max-height: none;
    overflow: visible;
    padding: 6px 10px 8px;
    gap: 6px;
  }

  .mobile-menu-btn,
  .header-nav-controls,
  .mode-tabs {
    flex: 0 0 auto;
  }

  .mode-tabs {
    flex: 1 1 0;
    min-width: 0;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .mode-tabs::-webkit-scrollbar { display: none; }

  .header-tools {
    flex: 1 0 100%;
    width: 100%;
    margin-left: 0 !important;
    display: flex !important;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    padding: 4px 0 2px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .header-tools > div[style*="width: 1px"] {
    display: none !important;
  }

  .viewer-media-shell {
    width: 100%;
    height: 100%;
    gap: 8px;
  }

  .media-controls {
    grid-template-columns: 44px 44px 44px 44px minmax(72px, 1fr) auto;
    grid-template-areas:
      "play back forward mute volume compat"
      "elapsed seek seek seek seek duration";
    gap: 7px;
    padding: 7px;
  }

  .media-controls .media-control-btn:nth-of-type(1) { grid-area: play; }
  .media-controls .media-control-btn:nth-of-type(2) { grid-area: back; }
  .media-controls .media-control-btn:nth-of-type(3) { grid-area: forward; }
  .media-controls .media-time:nth-of-type(1) { grid-area: elapsed; }
  .media-controls .media-seek { grid-area: seek; }
  .media-controls .media-time:nth-of-type(2) { grid-area: duration; }
  .media-controls .media-control-btn:nth-of-type(4) { grid-area: mute; }
  .media-controls .media-volume { grid-area: volume; }
  .media-controls .media-compat-btn {
    grid-area: compat;
    min-width: 0;
    padding: 0 9px;
  }

  .toolbar-sort-select { order: 1; }
  .toolbar-view-select { order: 2; }
  .header-size-slider,
  .header-size-slider--prominent { order: 3; }
  .header-search-box { order: 4; }
  .header-tools .nav-item { order: 5; }

  .header-search-box {
    flex: 0 0 44px;
    width: 44px;
    min-width: 44px;
    height: 44px;
    padding: 0;
    justify-content: center;
  }
  .header-search-trigger { display: inline-flex; }
  .header-search-inline-icon,
  .header-search-box > input,
  .header-search-box > .header-search-clear {
    display: none;
  }
  .mobile-search-panel {
    position: absolute;
    top: calc(100% + 6px);
    left: 10px;
    right: 10px;
    z-index: 500;
    height: 46px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 10px;
    background: var(--surface);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    box-shadow: 0 12px 32px rgba(0,0,0,0.45);
    color: var(--text);
  }
  .mobile-search-panel input {
    min-width: 0;
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    color: var(--text);
    font-size: 14px;
  }
  .mobile-search-panel .header-search-clear {
    display: inline-flex;
    width: 34px;
    height: 34px;
  }

  .sort-select {
    flex: 0 0 auto;
    width: auto;
    min-width: 154px;
    max-width: none;
    height: 44px;
    font-size: 13px;
  }

  .header-size-slider,
  .header-size-slider--prominent {
    flex: 0 0 190px;
    width: 190px;
    min-width: 190px;
    height: 44px;
    min-height: 44px;
  }

  .header-size-slider input[type=range],
  .header-size-slider--prominent input[type=range] {
    flex: 1;
    width: auto;
    min-width: 76px;
  }

  .header-tools .nav-item {
    flex: 0 0 auto;
    min-height: 44px;
  }

  .gallery.view-grid,
  .gallery.view-bookshelf {
    grid-template-columns: repeat(auto-fill, minmax(var(--card-size), 1fr)) !important;
  }

  .numbering-start-btn,
  .numbering-mode-btn,
  .numbering-popup {
    display: none !important;
  }
}

@media (max-width: 1024px) {
  .media-controls { grid-template-columns: auto minmax(0, 1fr); }
  .media-controls-secondary { grid-column: 1 / -1; justify-content: flex-start; }
}

/* Phone layout correction: keep the app inside the visual viewport and let
   controls wrap into usable rows instead of overflowing off-screen. */
@media (max-width: 768px) {
  html,
  body,
  #root {
    width: 100%;
    height: 100%;
    min-height: 100%;
    overflow: hidden;
  }

  .app-shell,
  .main-content {
    width: 100vw;
    height: 100dvh;
    min-height: 0;
  }

  .header {
    display: grid;
    grid-template-columns: 44px auto minmax(0, 1fr);
    grid-template-rows: auto auto;
    align-items: center;
    max-width: 100vw;
    padding: max(6px, env(safe-area-inset-top)) max(8px, env(safe-area-inset-right)) 8px max(8px, env(safe-area-inset-left));
    gap: 6px;
    overflow: visible;
  }

  .mobile-menu-btn { grid-column: 1; grid-row: 1; }
  .header-nav-controls { grid-column: 2; grid-row: 1; margin: 0; }
  .mode-tabs {
    grid-column: 3;
    grid-row: 1;
    min-width: 0;
    width: 100%;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
  }
  .mode-tab { min-height: 44px; padding: 7px 10px; }

  .header-tools {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    min-width: 0;
    margin: 0 !important;
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 7px;
    overflow: visible !important;
    padding: 2px 0 0;
  }
  .header-tools > div[style*="width: 1px"] { display: none !important; }
  .header-tools .sort-select {
    width: 100%;
    min-width: 0;
    max-width: none;
  }
  .header-tools .header-size-slider,
  .header-tools .header-size-slider--prominent {
    grid-column: 1 / -1;
    width: 100%;
    min-width: 0;
    max-width: none;
    flex: none;
  }
  .header-tools .header-search-box {
    width: 44px;
    min-width: 44px;
    max-width: 44px;
  }
  .mobile-search-panel .header-search-clear { width: 44px; height: 44px; }
  .header-tools .selection-toolbar { grid-column: 1 / -1; min-width: 0; flex-wrap: wrap; }

  .gallery.view-grid,
  .gallery.view-bookshelf {
    grid-template-columns: repeat(auto-fill, minmax(min(var(--card-size), 42vw), 1fr)) !important;
  }
  .gallery { padding: 12px; gap: 12px; }
  .book-content-area .subfolder-section { padding: 10px 4px 4px; }
  .book-content-area .subfolder-section-title { margin-left: 8px; margin-right: 8px; }

  .viewer-main { padding: 6px; }
  .viewer-media-shell {
    width: 100%;
    height: 100%;
    max-height: 100%;
    gap: 6px;
  }
  .media-controls {
    display: flex;
    flex-direction: column;
    gap: 7px;
    padding: 7px;
  }
  .media-controls-primary,
  .media-timeline,
  .media-controls-secondary { width: 100%; }
  .media-controls .media-controls-primary > *,
  .media-controls .media-timeline > *,
  .media-controls .media-controls-secondary > * { grid-area: auto !important; }
  .media-controls-primary { justify-content: center; }
  .media-timeline { display: grid; grid-template-columns: 44px minmax(0, 1fr) 44px; }
  .media-controls-secondary {
    display: grid;
    grid-template-columns: minmax(72px, 1fr) repeat(2, minmax(0, 1fr));
  }
  .media-volume { width: 100%; max-width: none; }
  .media-track-select { width: 100%; min-width: 0; max-width: none; }
  .media-track-select,
  .media-compat-btn { min-height: 44px; }
  .media-compat-btn { min-width: 0; width: 100%; padding: 0 7px; }

  .status-bar {
    padding-right: max(8px, env(safe-area-inset-right));
    padding-bottom: env(safe-area-inset-bottom);
    padding-left: max(8px, env(safe-area-inset-left));
  }
  .viewer-statusbar {
    min-width: 0;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
  }
  .viewer-statusbar > input { flex: 0 0 112px !important; min-width: 112px !important; }

  .modal-overlay { align-items: flex-end; }
  .settings-modal {
    width: 100vw;
    max-width: 100vw;
    height: min(92dvh, 720px);
    max-height: 92dvh;
    border-radius: 18px 18px 0 0;
  }
  .settings-body { min-height: 0; }
  .settings-sidebar { flex: 0 0 auto; }
  .settings-tab-btn { min-height: 44px; }
  .settings-panel { min-height: 0; }
  .reader-setting-row { align-items: flex-start; flex-direction: column; gap: 8px; }
  .reader-setting-options { width: 100%; }
  .reader-setting-options button { flex: 1; min-height: 44px; }
}

@media (max-width: 640px) {
  .header { grid-template-columns: 44px minmax(0, 1fr); grid-template-rows: auto auto auto; }
  .mobile-menu-btn { grid-column: 1; grid-row: 1; }
  .mode-tabs { grid-column: 2; grid-row: 1; }
  .header-nav-controls { grid-column: 1 / -1; grid-row: 2; gap: 5px; }
  .header-tools { grid-column: 1 / -1; grid-row: 3; }
  .mode-tab { font-size: 12px; }
  .mode-tab svg { display: none; }
  .media-controls-secondary { grid-template-columns: 1fr 1fr; }
  .media-controls .media-controls-secondary .media-volume { grid-column: 1 / -1 !important; }
  .media-controls .media-controls-secondary .media-compat-btn:last-child { grid-column: 1 / -1 !important; }
}

/* A phone keeps navigation and view tabs on one line. Secondary controls are
   a single swipeable rail instead of several rows that consume the reader. */
@media (max-width: 768px) {
  .app-shell,
  .main-content { width: 100%; max-width: 100%; }
  .header {
    display: grid;
    grid-template-columns: 44px auto minmax(0, 1fr);
    grid-template-rows: 44px auto;
    align-items: center;
    gap: 4px;
    width: 100%;
    max-width: 100%;
    padding: max(6px, env(safe-area-inset-top)) 8px 6px;
    overflow: hidden;
  }
  .mobile-menu-btn { grid-column: 1; grid-row: 1; }
  .header-nav-controls {
    grid-column: 2;
    grid-row: 1;
    gap: 2px;
    margin: 0;
  }
  .mode-tabs {
    grid-column: 3;
    grid-row: 1;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    overflow-x: auto;
    overscroll-behavior-x: contain;
  }
  .header-tools {
    grid-column: 1 / -1;
    grid-row: 2;
    display: flex !important;
    flex-wrap: nowrap !important;
    align-items: center;
    gap: 8px;
    width: 100%;
    min-width: 0;
    height: 48px;
    margin: 0 !important;
    padding: 2px 2px 4px;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .header-tools::-webkit-scrollbar { display: none; }
  .header-tools > * { flex-shrink: 0; }
  .header-tools .sort-select {
    flex: 0 0 142px;
    width: 142px;
    min-width: 142px;
    max-width: 142px;
  }
  .header-tools .header-size-slider,
  .header-tools .header-size-slider--prominent {
    flex: 0 0 168px;
    grid-column: auto;
    width: 168px;
    min-width: 168px;
    max-width: 168px;
  }
  .header-tools .header-search-box { flex: 0 0 44px; }
  .header-tools .selection-toolbar { flex-wrap: nowrap; width: max-content; }
  .mobile-search-panel {
    position: fixed;
    top: calc(env(safe-area-inset-top) + 110px);
    left: max(8px, env(safe-area-inset-left));
    right: max(8px, env(safe-area-inset-right));
    z-index: 500;
  }
  .gallery.view-grid,
  .gallery.view-bookshelf {
    grid-template-columns: repeat(auto-fill, minmax(min(42vw, 160px), 1fr)) !important;
  }
}

/* Web版で追加(DESIGN_GATE §3-4 A11Y): 本ファイル内の各所にある outline:none
   (input/select/range等)に対する、キーボード操作時のみ効く共通フォーカス
   リング。マウスクリック時の見た目(outline:none)は変更しない。!important は
   既存ルールの詳細度(specificity)に関わらず全箇所で確実にリングを
   表示させるため。 */
:focus-visible {
  outline: 2px solid var(--accent, #f97316) !important;
  outline-offset: 2px !important;
}

/* Keep orientation controls in the reader bars, outside the page image. */
.viewer-orientation-control { flex: 0 0 auto; }

@media (max-width: 768px) {
  .header {
    grid-template-columns: 44px minmax(0, 1fr);
    grid-template-rows: 44px 48px auto;
  }
  .mobile-menu-btn { grid-column: 1; grid-row: 1; }
  .header-nav-controls { grid-column: 2; grid-row: 1; }
  .mode-tabs {
    grid-column: 1 / -1;
    grid-row: 2;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    width: 100%;
    min-width: 0;
    overflow: visible;
  }
  .mode-tab {
    width: 100%;
    min-width: 0;
    max-width: none;
    min-height: 44px;
    padding: 3px;
    flex-direction: column;
    justify-content: center;
    gap: 1px;
    font-size: 10px;
    line-height: 1.2;
  }
  .mode-tab svg { display: block; width: 17px; height: 17px; flex: 0 0 auto; }
  .mode-tab-label--desktop { display: none; }
  .mode-tab-label--mobile { display: block; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
  .header-tools { grid-column: 1 / -1; grid-row: 3; }
  .mobile-search-panel { top: calc(env(safe-area-inset-top) + 158px); }
  .gallery .page-thumb-item { -webkit-touch-callout: none; user-select: none; }
  .gallery .page-thumb-item .item-checkbox { opacity: 0; pointer-events: none; }
  .gallery.is-page-selecting .page-thumb-item .item-checkbox { opacity: 1; pointer-events: auto; }
}

/* The reader's two pages share one gutter. Keep the artwork anchored to the
   binding edge even when the source pages have different aspect ratios. */
.viewer-pages--spread { gap: 0; }
.viewer-pages--spread .viewer-image-shell--spread {
  flex: 0 1 50%;
  width: 50%;
  max-width: 50%;
  min-width: 0;
  overflow: hidden;
}
.viewer-pages--spread .spread-page,
.vfo-images.viewer-pages--spread .spread-page {
  width: 100%;
  max-width: 100%;
  height: 100%;
  max-height: 100%;
  object-fit: contain;
  box-shadow: none;
}
.viewer-pages--spread > .viewer-image-shell--spread:first-child .spread-page { object-position: right center; }
.viewer-pages--spread > .viewer-image-shell--spread:nth-child(2) .spread-page { object-position: left center; }
.viewer-pages--spread.viewer-pages--rtl > .viewer-image-shell--spread:first-child .spread-page { object-position: left center; }
.viewer-pages--spread.viewer-pages--rtl > .viewer-image-shell--spread:nth-child(2) .spread-page { object-position: right center; }
.viewer-pages--spread > .viewer-image-shell--spread:only-child {
  flex-basis: 100%;
  width: 100%;
  max-width: 100%;
}
.viewer-pages--spread > .viewer-image-shell--spread:only-child .spread-page { object-position: center center; }

.viewer-header-actions { display: flex; align-items: center; gap: 6px; margin-left: auto; flex: 0 0 auto; }
.viewer-header-actions .hud-btn { flex: 0 0 auto; }
.viewer-operation-status {
  flex: 0 0 auto;
  max-width: min(240px, 42vw);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 11px;
  color: var(--text-secondary);
}

/* A page turn is the same for zone taps, swipe gestures, and toolbar controls. */
.viewer-pages { transform-style: preserve-3d; }
.viewer-main,
.viewer-fullscreen-overlay { touch-action: pan-y pinch-zoom; }
/* Names describe the physical tap/swipe side. This also makes RTL page turns
   follow the finger: rightward gestures curl right, leftward gestures curl left. */
.page-turn-exit--next {
  transform-origin: left center;
  animation: reader-page-turn-next 280ms cubic-bezier(.22,.7,.18,1) both;
}
.page-turn-exit--previous {
  transform-origin: right center;
  animation: reader-page-turn-previous 280ms cubic-bezier(.22,.7,.18,1) both;
}
@keyframes reader-page-turn-next {
  from { opacity: 1; transform: perspective(1100px) rotateY(0) translateX(0); filter: brightness(1); }
  to { opacity: .12; transform: perspective(1100px) rotateY(-75deg) translateX(-3%); filter: brightness(.7); }
}
@keyframes reader-page-turn-previous {
  from { opacity: 1; transform: perspective(1100px) rotateY(0) translateX(0); filter: brightness(1); }
  to { opacity: .12; transform: perspective(1100px) rotateY(75deg) translateX(3%); filter: brightness(.7); }
}
@media (prefers-reduced-motion: reduce) {
  .page-turn-exit--next,
  .page-turn-exit--previous { animation: none; }
}

/* Phone and touch-tablet landscape: the bookshelf is a drawer, not a column
   that steals reading width. A visible menu button reopens it on demand. */
@media (orientation: landscape) and (max-height: 600px),
       (orientation: landscape) and (any-pointer: coarse) {
  .app-shell.reader-viewer .mobile-menu-btn { display: flex; }
  .app-shell.reader-viewer .sidebar-toggle-btn { display: none; }
  .app-shell.reader-viewer .sidebar,
  .app-shell.reader-viewer .sidebar.collapsed {
    position: fixed;
    top: 0;
    left: 0;
    height: 100dvh;
    width: min(80vw, 300px);
    padding: 10px 0;
    transform: translateX(-100%);
    transition: transform .25s ease;
    box-shadow: 4px 0 24px rgba(0,0,0,.4);
  }
  .app-shell.reader-viewer .sidebar.collapsed .nav-label,
  .app-shell.reader-viewer .sidebar.collapsed .nav-title,
  .app-shell.reader-viewer .sidebar.collapsed .nav-title-row .nav-title,
  .app-shell.reader-viewer .sidebar.collapsed .shelf-count,
  .app-shell.reader-viewer .sidebar.collapsed .nav-icon-btn { display: initial; }
  .app-shell.reader-viewer .sidebar.collapsed .nav-item { justify-content: flex-start; padding-left: 10px; padding-right: 10px; }
  .app-shell.reader-viewer .sidebar.mobile-open { transform: translateX(0); }
  .app-shell.reader-viewer .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 99;
  }
}

/* Reader chrome stays out of the artwork until the reader asks for it. */
.app-shell.reader-viewer.reader-chrome-hidden .sidebar,
.app-shell.reader-viewer.reader-chrome-hidden .sidebar-backdrop,
.app-shell.reader-viewer.reader-chrome-hidden .header,
.app-shell.reader-viewer.reader-chrome-hidden .status-bar { display: none; }
.app-shell.reader-viewer.reader-chrome-hidden .viewer-main { padding: 0; }

/* Both neighboring pages are resolved ahead of time and sit behind the
   current page. Pointer movement updates only CSS variables, so the entire
   React app does not re-render on every touch frame. */
.viewer-main,
.viewer-fullscreen-overlay { isolation: isolate; }
.viewer-main > .viewer-pages--current { position: relative; z-index: 2; }
.vfo-images.viewer-pages--current { position: absolute; }
.viewer-swipe-preview-slot {
  position: absolute;
  inset: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  opacity: 0;
  pointer-events: none;
  transform: translate3d(var(--reader-preview-x, 0px), 0, 0) scale(.97);
  transition: opacity 120ms ease, transform 190ms ease;
}
.viewer-swipe-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.viewer-fullscreen-overlay > .viewer-swipe-preview-slot { inset: 0; z-index: 3004; }
.app-shell.reader-chrome-hidden .viewer-main > .viewer-swipe-preview-slot { inset: 0; }
.reader-dragging.reader-swipe-left > .viewer-swipe-preview-slot--next,
.reader-dragging.reader-swipe-right > .viewer-swipe-preview-slot--previous,
.reader-auto-turn-next > .viewer-swipe-preview-slot--next,
.reader-auto-turn-previous > .viewer-swipe-preview-slot--previous { opacity: 1; }
.reader-dragging > .viewer-pages--current {
  transform: translate3d(var(--reader-drag-x, 0px), 0, 0) rotateY(var(--reader-drag-tilt, 0deg));
  transform-origin: center;
  box-shadow: 0 0 28px rgba(0, 0, 0, .55);
}
.reader-dragging.reader-swipe-settling > .viewer-pages--current {
  transition: transform 190ms cubic-bezier(.2, .75, .2, 1);
}
@media (max-width: 768px), (max-height: 600px) {
  .viewer-main > .viewer-swipe-preview-slot { inset: 6px; }
  .app-shell.reader-chrome-hidden .viewer-main > .viewer-swipe-preview-slot { inset: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .reader-dragging.reader-swipe-settling > .viewer-pages--current,
  .viewer-swipe-preview-slot { transition: none; }
}

@media (max-width: 768px) {
  .app-shell.reader-viewer .header-nav-controls { width: max-content; }
  .app-shell.reader-viewer .viewer-header-actions {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    margin-left: 0;
  }
  .app-shell.reader-viewer .viewer-header-actions .hud-btn { width: 44px; height: 44px; }
}

/* Enlarged pages form one native scrolling document; shrinking restores turns. */
.reader-continuous { position: absolute; inset: 0; overflow: auto; z-index: 2; touch-action: pan-x pan-y pinch-zoom; overscroll-behavior: contain; cursor: grab; }
.reader-continuous:active { cursor: grabbing; }
.reader-continuous-track { display: flex; position: relative; }
.reader-continuous-page { flex: 0 0 auto; display: flex; align-items: center; justify-content: center; }
.reader-continuous-page .viewer-page { width: 100%; height: 100%; max-width: none; max-height: none; object-fit: contain; box-shadow: none; }
.viewer-fullscreen-overlay > .reader-continuous { z-index: 3005; }
.app-shell.reader-viewer .viewer-main, .viewer-fullscreen-overlay { user-select: none; -webkit-user-select: none; -webkit-tap-highlight-color: transparent; }
.app-shell.reader-viewer .viewer-main *, .viewer-fullscreen-overlay * { -webkit-tap-highlight-color: transparent; }

.viewer-main.reader-continuous-mode, .viewer-fullscreen-overlay.reader-continuous-mode { touch-action: pan-x pan-y pinch-zoom; }

.last-read-volume-badge { position: absolute; right: 8px; bottom: 8px; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; color: #f5c35c; background: rgba(0,0,0,.85); border: 1px solid rgba(245,195,92,.7); z-index: 3; }
.bt-col-name .last-read-volume-badge { position: static; width: 26px; height: 26px; flex-shrink: 0; margin-left: 6px; }
.sidebar-work-history { flex: 0 1 auto; min-height: 0; }
.sidebar.collapsed .sidebar-work-history { display: none; }

/* Library lists share the same remembered scroll and touch fast-scroll host. */
.book-table { flex: 1; min-height: 0; overflow-y: auto; }
.book-table-header { position: sticky; top: 0; z-index: 1; }

.bt-col-thumb .persistent-folder-cover { width: 40px; height: 56px; flex-shrink: 0; }
.persistent-folder-cover {
  position: relative;
  overflow: hidden;
  -webkit-touch-callout: none;
  user-select: none;
  touch-action: manipulation;
}

.persistent-folder-cover:focus-visible {
  outline: 2px solid var(--accent, #ef4444);
  outline-offset: 2px;
}

.persistent-folder-cover__image,
.persistent-folder-cover__fallback {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.persistent-folder-cover__custom-badge {
  position: absolute;
  left: 7px;
  bottom: 7px;
  z-index: 2;
  padding: 3px 7px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: rgba(10, 12, 18, 0.82);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  backdrop-filter: blur(10px);
}

.folder-cover-menu {
  position: fixed;
  z-index: 2200;
  display: grid;
  min-width: 228px;
  padding: 6px;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.14));
  border-radius: 12px;
  background: var(--surface-elevated, #20232b);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.42);
}

.folder-cover-menu button {
  min-height: 42px;
  padding: 9px 12px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-primary, #f7f7f8);
  font: inherit;
  font-size: 13px;
  text-align: left;
  cursor: pointer;
}

.folder-cover-menu button:hover,
.folder-cover-menu button:focus-visible {
  outline: none;
  background: var(--panel-glass, rgba(255, 255, 255, 0.08));
}

.folder-cover-picker-backdrop {
  position: fixed;
  inset: 0;
  z-index: 2300;
  display: grid;
  place-items: center;
  padding: max(16px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
  background: rgba(5, 7, 12, 0.78);
  backdrop-filter: blur(8px);
}

.folder-cover-picker {
  display: flex;
  flex-direction: column;
  width: min(760px, 100%);
  max-height: min(82dvh, 760px);
  overflow: hidden;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.14));
  border-radius: 18px;
  background: var(--surface, #16181f);
  color: var(--text-primary, #f7f7f8);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.55);
}

.folder-cover-picker > header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 18px 14px;
  border-bottom: 1px solid var(--panel-border, rgba(255, 255, 255, 0.12));
}

.folder-cover-picker__heading {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 10px;
}

.folder-cover-picker__heading > div {
  min-width: 0;
}

.folder-cover-picker__heading p {
  overflow: hidden;
  max-width: min(560px, 65vw);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-cover-picker__back {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.14));
  border-radius: 10px;
  background: var(--surface-elevated, #242731);
  color: inherit;
  font-size: 18px;
  cursor: pointer;
}

.folder-cover-picker h2,
.folder-cover-picker p {
  margin: 0;
}

.folder-cover-picker h2 {
  font-size: 17px;
  line-height: 1.35;
}

.folder-cover-picker p {
  margin-top: 4px;
  color: var(--text-secondary, #a9acb5);
  font-size: 12px;
}

.folder-cover-picker > header > button {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.14));
  border-radius: 10px;
  background: var(--surface-elevated, #242731);
  color: inherit;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.folder-cover-picker__status {
  display: grid;
  min-height: 220px;
  place-items: center;
  padding: 28px;
  color: var(--text-secondary, #a9acb5);
  font-size: 13px;
  text-align: center;
}

.folder-cover-picker__body {
  overflow: auto;
  overscroll-behavior: contain;
  padding: 14px 16px 18px;
}

.folder-cover-picker__folders {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
}

.folder-cover-picker__folders > button {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto 16px;
  align-items: center;
  gap: 8px;
  min-height: 46px;
  padding: 8px 10px;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.12));
  border-radius: 10px;
  background: var(--surface-elevated, #242731);
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.folder-cover-picker__folders > button:hover,
.folder-cover-picker__folders > button:focus-visible,
.folder-cover-picker__back:hover,
.folder-cover-picker__back:focus-visible {
  border-color: var(--accent, #ef4444);
  outline: none;
}

.folder-cover-picker__folders strong {
  overflow: hidden;
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-cover-picker__folders small {
  color: var(--text-secondary, #a9acb5);
  font-size: 10px;
}

.folder-cover-picker__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(118px, 1fr));
  gap: 12px;
  padding: 0;
}

.folder-cover-picker__grid > button {
  display: grid;
  grid-template-rows: minmax(148px, 1fr) auto auto;
  min-width: 0;
  overflow: hidden;
  padding: 0 0 9px;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.12));
  border-radius: 12px;
  background: var(--surface-elevated, #242731);
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.folder-cover-picker__grid > button:hover,
.folder-cover-picker__grid > button:focus-visible,
.folder-cover-picker__grid > button.is-selected {
  border-color: var(--accent, #ef4444);
  outline: none;
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent, #ef4444) 35%, transparent);
}

.folder-cover-picker__grid img {
  width: 100%;
  height: 100%;
  min-height: 148px;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.04);
}

.folder-cover-picker__grid span,
.folder-cover-picker__grid small {
  overflow: hidden;
  padding: 0 9px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-cover-picker__more {
  display: block;
  min-height: 42px;
  margin: 14px auto 0;
  padding: 8px 16px;
  border: 1px solid var(--panel-border, rgba(255, 255, 255, 0.14));
  border-radius: 999px;
  background: var(--surface-elevated, #242731);
  color: inherit;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.folder-cover-picker__grid span {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 650;
}

.folder-cover-picker__grid small {
  margin-top: 3px;
  color: var(--text-secondary, #a9acb5);
  font-size: 10px;
}

@media (max-width: 600px) {
  .folder-cover-picker-backdrop {
    align-items: end;
    padding-inline: 0;
    padding-bottom: 0;
  }

  .folder-cover-picker {
    width: 100%;
    max-height: 88dvh;
    border-radius: 20px 20px 0 0;
  }

  .folder-cover-picker__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    padding: 0;
  }

  .folder-cover-picker__body { padding: 12px; }
  .folder-cover-picker__folders small { display: none; }
  .folder-cover-picker__folders > button { grid-template-columns: 22px minmax(0, 1fr) 16px; }

  .folder-cover-picker__grid > button {
    grid-template-rows: 128px auto auto;
  }

  .folder-cover-picker__grid img {
    min-height: 128px;
  }
}
.mjv-fast-scrollbar {
  position: fixed;
  z-index: 450;
  width: 32px;
  min-width: 32px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: transparent;
  opacity: 0.24;
  cursor: ns-resize;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: opacity 140ms ease, background 140ms ease;
}

.mjv-fast-scrollbar::before {
  content: '';
  position: absolute;
  inset: 0 11px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--text-secondary) 24%, transparent);
}

.mjv-fast-scrollbar.is-active,
.mjv-fast-scrollbar:hover,
.mjv-fast-scrollbar:focus-visible {
  opacity: 1;
  background: color-mix(in srgb, var(--surface-elevated) 62%, transparent);
}

.mjv-fast-scrollbar:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.mjv-fast-scrollbar__thumb {
  position: absolute;
  left: 10px;
  width: 12px;
  min-height: 32px;
  border: 1px solid color-mix(in srgb, var(--text) 48%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--text) 76%, var(--surface-elevated));
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.38);
  pointer-events: none;
}

@media (pointer: coarse) {
  .mjv-fast-scrollbar {
    opacity: 0.48;
  }

  .mjv-fast-scrollbar.is-active {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mjv-fast-scrollbar {
    transition: none;
  }
}
.work-history-list {
  flex: 1;
  min-height: 0;
  width: 100%;
  overflow: auto;
  padding: 16px;
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}

.work-history-list--compact {
  flex: none;
  min-height: auto;
  overflow: visible;
  padding: 0;
}

.work-history-list__toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
  padding: 8px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  background: var(--surface-elevated);
}

.work-history-list__selection-count {
  min-width: 5.5em;
  margin-right: auto;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 700;
}

.work-history-list__toolbar-button {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 5px 9px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  background: var(--panel-glass);
  color: var(--text);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.work-history-list__toolbar-button:hover {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--panel-border));
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-elevated));
}

.work-history-list__toolbar-button--danger {
  color: #f87171;
}

.work-history-list__toolbar-button--danger:hover {
  border-color: rgba(248, 113, 113, 0.55);
  background: rgba(248, 113, 113, 0.1);
}

.work-history-list__entries {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 10px;
}

.work-history-list__entry {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 92px;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-md);
  background: var(--surface);
  cursor: pointer;
  touch-action: pan-y;
  transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
}

.work-history-list__entry:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--panel-border));
  background: var(--surface-elevated);
}

.work-history-list__entry:active {
  transform: scale(0.99);
}

.work-history-list__entry:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.work-history-list__entry.is-selected {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
}

.work-history-list__checkbox {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.work-history-list__cover {
  display: grid;
  width: 54px;
  height: 72px;
  flex: 0 0 auto;
  place-items: center;
  overflow: hidden;
  border-radius: 6px;
  background: var(--surface-elevated);
  color: var(--panel-border);
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.3);
}

.work-history-list__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.work-history-list__details {
  display: flex;
  min-width: 0;
  flex: 1;
  flex-direction: column;
  gap: 5px;
}

.work-history-list__title {
  display: -webkit-box;
  overflow: hidden;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  overflow-wrap: anywhere;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.work-history-list__subtitle {
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.work-history-list__time {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-secondary);
  font-size: 11px;
  line-height: 1;
}

.work-history-list__empty {
  display: flex;
  min-height: 180px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  color: var(--text-secondary);
  text-align: center;
}

.work-history-list__empty small {
  opacity: 0.75;
}

.work-history-list--compact .work-history-list__toolbar {
  gap: 4px;
  margin: 0 0 6px;
  padding: 6px;
}

.work-history-list--compact .work-history-list__selection-count {
  width: 100%;
  min-width: 0;
  margin: 0 0 2px;
}

.work-history-list--compact .work-history-list__toolbar-button {
  min-height: 27px;
  flex: 1 1 auto;
  padding: 4px 6px;
  font-size: 11px;
}

.work-history-list--compact .work-history-list__entries {
  display: flex;
  max-height: min(38vh, 320px);
  flex-direction: column;
  gap: 3px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.work-history-list--compact .work-history-list__entry {
  min-height: 42px;
  flex: 0 0 auto;
  gap: 8px;
  padding: 6px 8px;
  border-color: transparent;
  border-radius: var(--radius-sm);
  background: transparent;
}

.work-history-list--compact .work-history-list__entry:hover {
  border-color: var(--panel-border);
  background: var(--panel-glass);
}

.work-history-list--compact .work-history-list__entry.is-selected {
  border-color: color-mix(in srgb, var(--accent) 60%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}

.work-history-list--compact .work-history-list__checkbox {
  width: 16px;
  height: 16px;
}

.work-history-list--compact .work-history-list__details {
  gap: 3px;
}

.work-history-list--compact .work-history-list__title {
  display: block;
  overflow: hidden;
  font-size: 12px;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.work-history-list--compact .work-history-list__time {
  font-size: 10px;
}

.work-history-list--compact .work-history-list__empty {
  min-height: 72px;
  flex-direction: row;
  gap: 7px;
  padding: 12px 8px;
  font-size: 11px;
}

@media (max-width: 640px) {
  .work-history-list__entries {
    grid-template-columns: 1fr;
  }

  .work-history-list__entry {
    min-height: 84px;
  }

  .work-history-list__cover {
    width: 46px;
    height: 62px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .work-history-list__entry {
    transition: none;
  }
}