/* ============================================================================
 * reader.css —— 可视化阅读器（v9）样式层
 *
 * 本文件只作用于 #reader.reader-shell 内部，在 app.css 之后加载，
 * 因此可以用同选择器覆盖旧规则；app.css 中的既有类名（.pdf-page /
 * .textLayer / .anno-box / .ann-item…）一律保留，不改变既有能力。
 *
 * 三套阅读主题用 #reader[data-reader-theme] 上的局部变量驱动：
 *   --rd-bg / --rd-surface / --rd-border / --rd-ink* / --rd-page-bg / --rd-canvas-filter
 * ==========================================================================*/

/* ---------------------------------------------------------------- 主题变量 */
.reader-shell {
  --rd-bg: var(--bg-inset);
  --rd-surface: var(--bg-subtle);
  --rd-border: var(--line);
  --rd-ink: var(--ink);
  --rd-ink-2: var(--ink-2);
  --rd-ink-3: var(--ink-3);
  --rd-page-bg: #ffffff;
  --rd-canvas-filter: none;
}

/* 状态播报只提供给辅助技术，不占用阅读器工具栏空间。 */
.reader-shell .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 夜间：页面画布反色（阅读器常用做法，正文变暗底白字），UI 同步转暗 */
.reader-shell[data-reader-theme="night"] {
  --rd-bg: #14161a;
  --rd-surface: #1b1e24;
  --rd-border: #2c313a;
  --rd-ink: #dde2e9;
  --rd-ink-2: #a9b2be;
  --rd-ink-3: #7d8695;
  --rd-page-bg: #0e1013;
  --rd-canvas-filter: invert(1) hue-rotate(180deg) brightness(.97) contrast(.95);
  color: var(--rd-ink);
}

/* 护眼：暖色纸感，轻微降蓝 */
.reader-shell[data-reader-theme="eye"] {
  --rd-bg: #e3ddcb;
  --rd-surface: #f1ebdc;
  --rd-border: #d3cab4;
  --rd-ink: #34322b;
  --rd-ink-2: #5d594c;
  --rd-ink-3: #837c69;
  --rd-page-bg: #fbf6ea;
  --rd-canvas-filter: sepia(.26) saturate(.94) brightness(1.01);
  color: var(--rd-ink);
}

.reader-shell[data-reader-theme="night"],
.reader-shell[data-reader-theme="eye"] { background: var(--rd-surface); border-color: var(--rd-border); }

/* ---------------------------------------------------------------- 工具栏 */
.reader-toolbar {
  background: var(--rd-surface);
  border-bottom-color: var(--rd-border);
  color: var(--rd-ink);
}
.tb-group { flex-wrap: nowrap; }
.tb-zoom {
  min-width: 54px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  color: var(--rd-ink-2);
}
.tb-search { gap: 3px; }
.tb-search-input {
  width: 168px;
  padding: 3px 8px;
  font-size: .82rem;
  border: 1px solid var(--rd-border);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  color: var(--rd-ink);
}
.tb-search-input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 0; }
.tb-search-count {
  min-width: 62px;
  font-size: .76rem;
  color: var(--rd-ink-3);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.tb-search-count.hit { color: var(--accent); font-weight: 600; }
.reader-shell #btn-theme { white-space: nowrap; }

/* 缩放倍数下拉 */
.zoom-menu {
  position: absolute;
  z-index: 130;
  min-width: 132px;
  padding: 5px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-3);
}
.zoom-menu[hidden] { display: none; }
.zoom-menu button {
  text-align: left;
  border: 0;
  background: transparent;
  padding: 5px 9px;
  font-size: .82rem;
  border-radius: var(--radius-sm);
  color: var(--ink);
  white-space: nowrap;
}
.zoom-menu button:hover { background: var(--accent-soft); color: var(--accent); }
.zoom-menu button.active { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.zoom-menu .zoom-menu-sep { height: 1px; margin: 3px 4px; background: var(--line); }

/* ---------------------------------------------------------------- 版式 */
.reader-body {
  display: grid;
  grid-template-columns: 208px minmax(0, 1fr) 290px;
  min-height: 70vh;
  align-items: stretch;
}

.reader-shell.side-collapsed .reader-body { grid-template-columns: minmax(0, 1fr) 290px; }
.reader-shell.side-collapsed .reader-side { display: none; }

.pdf-stage {
  position: relative;
  min-width: 0;
  height: 76vh;
  min-height: 460px;
  display: flex;
  flex-direction: column;
  background: var(--rd-bg);
}

.pdf-scroll { flex: 1 1 auto; height: auto; min-height: 0; }

.reader-progress {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  z-index: 20;
  pointer-events: none;
  background: color-mix(in srgb, var(--rd-border) 55%, transparent);
}
.reader-progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width .14s linear;
}
.reader-progress[aria-valuenow="100"] span { border-radius: 0 2px 2px 0; }

.pdf-canvas { filter: var(--rd-canvas-filter); }
.pdf-page { background: var(--rd-page-bg); border-color: var(--rd-border); }
.pdf-page[data-rendered] { border-color: var(--line-strong); }
.pdf-page-badge { color: var(--rd-ink-3); }

/* 搜索命中层：在画布之上、文本层之下，不拦截鼠标（不影响选词） */
.search-layer {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}
.search-hit {
  position: absolute;
  border-radius: 2px;
  background: rgba(255, 205, 0, .34);
  box-shadow: inset 0 0 0 1px rgba(226, 162, 0, .55);
}
.search-hit.active {
  background: rgba(255, 132, 0, .46);
  box-shadow: inset 0 0 0 1px rgba(214, 92, 0, .85), 0 0 0 2px rgba(255, 132, 0, .35);
}

/* ---------------------------------------------------------------- 左侧导航 */
.reader-side {
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 76vh;
  max-height: none;
  background: var(--rd-surface);
  border-right: 1px solid var(--rd-border);
  color: var(--rd-ink);
}

.side-tabs {
  display: flex;
  border-bottom: 1px solid var(--rd-border);
  flex: 0 0 auto;
}
.side-tab {
  flex: 1 1 0;
  border: 0;
  background: transparent;
  padding: 8px 4px;
  font-size: .8rem;
  color: var(--rd-ink-3);
  border-bottom: 2px solid transparent;
  cursor: pointer;
}
.side-tab:hover { color: var(--accent); }
.side-tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; background: color-mix(in srgb, var(--accent-soft) 45%, transparent); }

.side-panes { flex: 1 1 auto; overflow: auto; position: relative; }
.side-pane { display: none; }
.side-pane.active { display: block; }

.side-empty { color: var(--rd-ink-3); font-size: .78rem; text-align: center; padding: 18px 10px; margin: 0; }

.side-collapse {
  flex: 0 0 auto;
  border: 0;
  border-top: 1px solid var(--rd-border);
  background: transparent;
  color: var(--rd-ink-3);
  font-size: .76rem;
  padding: 6px;
  cursor: pointer;
}
.side-collapse:hover { color: var(--accent); background: var(--accent-soft); }

/* 缩略图 */
.thumb-list { display: flex; flex-direction: column; gap: 9px; padding: 10px; }
.thumb-item {
  border: 1px solid var(--rd-border);
  border-radius: 4px;
  padding: 4px;
  background: var(--bg-elev);
  cursor: pointer;
  transition: border-color .14s, box-shadow .14s;
}
.thumb-item:hover { border-color: var(--accent); }
.thumb-item.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
}
.thumb-box {
  width: 100%;
  aspect-ratio: 8.27 / 11.69;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--rd-page-bg);
}
.thumb-box canvas { max-width: 100%; max-height: 100%; display: block; }
.thumb-no {
  font-size: .72rem;
  color: var(--rd-ink-3);
  text-align: center;
  font-variant-numeric: tabular-nums;
  padding-top: 3px;
}
.thumb-item.active .thumb-no { color: var(--accent); font-weight: 600; }

/* 目录 */
.outline-list { padding: 8px 6px 16px; }
.outline-children { margin-left: 9px; padding-left: 3px; border-left: 1px dashed var(--rd-border); display: none; }
.outline-children.open { display: block; }
.outline-row {
  display: flex;
  align-items: center;
  gap: 3px;
  border-radius: 4px;
  padding: 3px 5px;
  font-size: .79rem;
  cursor: pointer;
}
.outline-row:hover { background: var(--accent-soft); }
.outline-row.active { background: color-mix(in srgb, var(--accent-soft) 75%, transparent); color: var(--accent); font-weight: 600; }
.outline-toggle {
  flex: 0 0 auto;
  width: 16px;
  border: 0;
  background: transparent;
  padding: 0;
  font-size: .7rem;
  color: var(--rd-ink-3);
  cursor: pointer;
}
.outline-toggle.empty { visibility: hidden; }
.outline-title { flex: 1 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.outline-page { flex: 0 0 auto; color: var(--rd-ink-3); font-size: .72rem; font-variant-numeric: tabular-nums; }

/* 搜索命中页列表 */
.search-list { padding: 8px 10px 16px; display: flex; flex-direction: column; gap: 6px; }
.search-item {
  border: 1px solid var(--rd-border);
  border-radius: 4px;
  background: var(--bg-elev);
  padding: 6px 8px;
  cursor: pointer;
  font-size: .79rem;
}
.search-item:hover { border-color: var(--accent); }
.search-item.active { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 26%, transparent); }
.search-item-head { display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.search-page { font-weight: 600; color: var(--rd-ink-2); font-size: .76rem; }
.search-n { color: var(--rd-ink-3); font-size: .72rem; }
.search-snippet { margin: 3px 0 0; color: var(--rd-ink-3); font-size: .75rem; line-height: 1.45; word-break: break-word; }
.search-snippet mark { background: #ffe08a; color: #333; border-radius: 2px; padding: 0 1px; }
.search-progress { color: var(--rd-ink-3); font-size: .74rem; padding: 4px 2px; }

/* ---------------------------------------------------------------- 右栏（标注） */
.ann-panel {
  background: var(--rd-surface);
  border-left-color: var(--rd-border);
  color: var(--rd-ink);
  height: 76vh;
  max-height: none;
}
.ann-head { border-bottom-color: var(--rd-border); }
.ann-filter { border-bottom-color: var(--rd-border); }
.ann-close {
  border: 0;
  background: transparent;
  color: var(--rd-ink-3);
  cursor: pointer;
  font-size: .9rem;
  display: none;
}
.ann-close:hover { color: var(--danger); }

.reader-shell[data-reader-theme="night"] .ann-item,
.reader-shell[data-reader-theme="eye"] .ann-item,
.reader-shell[data-reader-theme="night"] .search-item,
.reader-shell[data-reader-theme="eye"] .search-item,
.reader-shell[data-reader-theme="night"] .thumb-item,
.reader-shell[data-reader-theme="eye"] .thumb-item { background: var(--rd-bg); border-color: var(--rd-border); }

.reader-shell[data-reader-theme="night"] .chip,
.reader-shell[data-reader-theme="eye"] .chip,
.reader-shell[data-reader-theme="night"] .btn-mini,
.reader-shell[data-reader-theme="eye"] .btn-mini {
  background: var(--bg-elev);
  border-color: var(--rd-border);
  color: var(--rd-ink-2);
}
.reader-shell[data-reader-theme="night"] .ann-quote,
.reader-shell[data-reader-theme="eye"] .ann-quote { background: var(--rd-bg); border-left-color: var(--rd-border); color: var(--rd-ink-2); }
.reader-shell[data-reader-theme="night"] .tb-group button,
.reader-shell[data-reader-theme="eye"] .tb-group button { color: var(--rd-ink); }
.reader-shell[data-reader-theme="night"] .tb-search-input,
.reader-shell[data-reader-theme="eye"] .tb-search-input { background: var(--rd-bg); color: var(--rd-ink); border-color: var(--rd-border); }
.reader-shell[data-reader-theme="night"] .zoom-menu,
.reader-shell[data-reader-theme="eye"] .zoom-menu { background: var(--bg-elev); }
.reader-shell[data-reader-theme="night"] .pdf-page-badge { background: rgba(20, 22, 26, .82); color: var(--rd-ink-3); }

/* ---------------------------------------------------------------- 响应式 */
/* 宽屏：右侧「标注」面板常驻，去掉它的抽屉开关 */
@media (min-width: 1021px) {
  #btn-ann { display: none; }
}

@media (max-width: 1180px) {
  .reader-body { grid-template-columns: 176px minmax(0, 1fr) 250px; }
  .reader-shell.side-collapsed .reader-body { grid-template-columns: minmax(0, 1fr) 250px; }
  .tb-search-input { width: 120px; }
  .tb-search-count { min-width: 52px; }
}

/* 窄屏：左右侧栏都变成抽屉（默认收起，工具栏按钮打开） */
@media (max-width: 1020px) {
  .reader-body,
  .reader-shell.side-collapsed .reader-body { grid-template-columns: minmax(0, 1fr); }
  .pdf-stage { height: 66vh; }

  .reader-shell .reader-side {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 264px;
    height: auto;
    z-index: 130;
    transform: translateX(-103%);
    transition: transform .18s ease-out;
    box-shadow: var(--shadow-3);
    display: flex;
  }
  .reader-shell.side-open .reader-side { transform: none; }
  .reader-shell.side-collapsed .reader-side { display: flex; }
  .side-collapse { display: none; }

  .reader-shell .ann-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 300px;
    height: auto;
    z-index: 130;
    transform: translateX(103%);
    transition: transform .18s ease-out;
    box-shadow: var(--shadow-3);
  }
  .reader-shell.ann-open .ann-panel { transform: none; }
  .ann-close { display: inline-block; }
}

@media (max-width: 700px) {
  .reader-toolbar { gap: 8px; padding: 6px 8px; font-size: .8rem; }
  .tb-search-input { width: 92px; }
  .tb-status { display: none; }
  .pdf-stage { height: 58vh; min-height: 340px; }
  .reader-shell .reader-side { width: 240px; }
  .reader-shell .ann-panel { width: 88vw; }
  .tb-zoom { min-width: 44px; }
}

@media print {
  .reader-side, .reader-progress, .search-layer { display: none !important; }
}

/* Annotation controls use existing reader theme tokens. */
.ann-tools { padding: 12px; border-bottom: 1px solid var(--rd-border); display: grid; gap: 8px; }
.ann-tools label { color: var(--rd-ink-2); font-size: .8rem; }
.ann-tools input, .ann-tools select { width: 100%; min-height: 44px; box-sizing: border-box; background: var(--rd-bg); color: var(--rd-ink); border: 1px solid var(--rd-border); border-radius: 6px; padding: 8px; }
.ann-tool-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.ann-status { margin: 0; color: var(--rd-ink-2); font-size: .85rem; overflow-wrap: anywhere; }
.ann-status.error { color: var(--danger); }
.ann-help { font-size: .8rem; color: var(--rd-ink-2); }
.ann-help summary { cursor: pointer; min-height: 44px; display: flex; align-items: center; }
.ann-help p { line-height: 1.65; }
.ann-panel .btn-mini, .ann-panel .chip, .ann-close, .sel-toolbar button, #note-modal button { min-height: 44px; min-width: 44px; touch-action: manipulation; }
.ann-filter { flex-wrap: wrap; gap: 8px; }
.ann-panel { display: flex; flex-direction: column; overflow: hidden; }
.ann-tools { flex: 0 0 auto; }
.ann-list { min-height: 100px; flex: 1 1 auto; overflow-y: auto; }
.ann-panel :focus-visible, .sel-toolbar :focus-visible, #note-modal :focus-visible { outline: 3px solid var(--accent, #2563eb); outline-offset: 3px; }
#note-modal .modal { max-height: 90vh; overflow-y: auto; }
#note-modal label { display: block; margin-bottom: 8px; }
#note-modal-status { font-size: .85rem; overflow-wrap: anywhere; }
@media (max-width: 1020px) { .reader-shell .ann-panel { width: min(360px, 100vw); } }
@media (prefers-reduced-motion: reduce) {
  .reader-side, .ann-panel, .anno-box.flash, .anno-flag.flash { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .anno-box.flash, .anno-flag.flash { outline: 3px solid var(--accent, #2563eb); outline-offset: 2px; }
}

/* Keep annotation actions visible while only the annotation list scrolls. */
.pdf-stage { position: relative; }
.pdf-stage > .sel-toolbar { position: absolute; z-index: 80; }
.ann-tools { gap: 6px; padding: 10px 12px; }
.ann-options { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 8px; }
.ann-options label { display: block; margin-bottom: 4px; }
.ann-tool-actions { gap: 6px; }
.ann-tool-actions .btn-mini { flex: 1 1 auto; }
.ann-status { line-height: 1.4; }
.ann-help summary { min-height: 28px; }
.ann-help[open] p { max-height: 110px; overflow-y: auto; margin: 4px 0; }
.ann-result-count { margin: 0; padding: 6px 12px; flex: 0 0 auto; }
@media (max-height: 620px) {
  .ann-panel { height: 88vh; }
  .ann-tools { gap: 4px; padding-top: 6px; padding-bottom: 6px; }
  .ann-help { display: none; }
  .ann-list { min-height: 44px; }
}

/* Local night theme must style both the foreground and control surface. */
#reader[data-reader-theme="night"] {
  --rd-control-bg: #222833;
  --rd-control-hover: #303b4b;
  --rd-error: #ffadb0;
  --rd-active-bg: #244675;
  --rd-active-ink: #f2f5ff;
}
#reader[data-reader-theme="night"] .reader-toolbar button,
#reader[data-reader-theme="night"] .reader-side button,
#reader[data-reader-theme="night"] .ann-panel button,
#reader[data-reader-theme="night"] .sel-toolbar button,
#reader[data-reader-theme="night"] .zoom-menu button {
  background: var(--rd-control-bg);
  color: var(--rd-ink);
  border-color: #4b5667;
}
#reader[data-reader-theme="night"] .reader-toolbar button:hover,
#reader[data-reader-theme="night"] .reader-side button:hover,
#reader[data-reader-theme="night"] .ann-panel button:hover,
#reader[data-reader-theme="night"] .sel-toolbar button:hover { background: var(--rd-control-hover); color: var(--rd-ink); }
#reader[data-reader-theme="night"] .chip.active,
#reader[data-reader-theme="night"] .side-tab.active,
#reader[data-reader-theme="night"] .zoom-menu button.active { background: var(--rd-active-bg); color: var(--rd-active-ink); }
#reader[data-reader-theme="night"] input:not([type="checkbox"]),
#reader[data-reader-theme="night"] select,
#reader[data-reader-theme="night"] textarea,
#reader[data-reader-theme="night"] option { background: var(--rd-control-bg); color: var(--rd-ink); border-color: #4b5667; }
#reader[data-reader-theme="night"] input::placeholder,
#reader[data-reader-theme="night"] textarea::placeholder { color: var(--rd-ink-2); opacity: 1; }
#reader[data-reader-theme="night"] .reader-side,
#reader[data-reader-theme="night"] .ann-panel,
#reader[data-reader-theme="night"] .sel-toolbar,
#reader[data-reader-theme="night"] .zoom-menu { background: var(--rd-surface); color: var(--rd-ink); border-color: var(--rd-border); }
#reader[data-reader-theme="night"] .ann-status,
#reader[data-reader-theme="night"] .tb-status,
#reader[data-reader-theme="night"] .ann-help,
#reader[data-reader-theme="night"] .ann-result-count { color: var(--rd-ink-2); }
#reader[data-reader-theme="night"] .ann-status.error,
#reader[data-reader-theme="night"] .tb-status.warn,
#reader[data-reader-theme="night"] .ann-panel button.danger { color: var(--rd-error); }

/* Night labels and annotation content override inherited light palette text. */
#reader[data-reader-theme="night"] .tb-check,
#reader[data-reader-theme="night"] .ann-comment,
#reader[data-reader-theme="night"] .ann-kind,
#reader[data-reader-theme="night"] .ann-item-head { color: var(--rd-ink); }
#reader[data-reader-theme="night"] .ann-page,
#reader[data-reader-theme="night"] .ann-item .muted,
#reader[data-reader-theme="night"] .ann-empty,
#reader[data-reader-theme="night"] .ann-tools label { color: var(--rd-ink-2); }
#reader[data-reader-theme="night"] .ann-panel .badge { background: var(--rd-control-bg); color: var(--rd-ink); border-color: #4b5667; }

/* Landscape drawers scroll as one surface so annotations stay reachable. */
@media (max-width: 1020px) and (max-height: 620px) {
  .reader-shell .ann-panel {
    height: 100vh;
    height: 100dvh;
    max-height: 100vh;
    max-height: 100dvh;
    overflow-y: auto;
    overscroll-behavior-y: contain;
  }
  .reader-shell .ann-panel .ann-head,
  .reader-shell .ann-panel .ann-tools,
  .reader-shell .ann-panel .ann-filter,
  .reader-shell .ann-panel .ann-result-count { flex-shrink: 0; }
  .reader-shell .ann-panel .ann-list {
    flex: 0 0 auto;
    min-height: 200px;
    max-height: none;
    overflow: visible;
  }
}

/* Simple reading surface: optional information stays one click away. */
body.library-reading .doc-header { gap: 12px; margin-bottom: 12px; }
body.library-reading .doc-header h1 { font-size: clamp(1.2rem, 2.5vw, 1.65rem); line-height: 1.45; margin-bottom: 8px; }
body.library-reading .doc-meta-row { gap: 6px 10px; }
body.library-reading .doc-header-actions, body.library-reading .doc-tools { gap: 8px; }
body.library-reading .doc-header-actions { align-items: center; }
.doc-disclosure { border: 1px solid var(--line); border-radius: 8px; margin: 8px 0; background: var(--bg-subtle); }
.doc-disclosure > summary { min-height: 44px; padding: 0 12px; display: flex; align-items: center; gap: 8px; cursor: pointer; font-weight: 600; }
.doc-disclosure > summary::before { content: '›'; font-size: 1.25rem; }
.doc-disclosure[open] > summary::before { content: '⌄'; }
.doc-disclosure-content { padding: 0 12px 12px; }
.doc-disclosure .kv { margin: 8px 0; }
.doc-secondary-tools { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.attachment-details ul { margin: 0; padding: 8px 16px 12px 32px; }
.attachment-details li { margin: 8px 0; overflow-wrap: anywhere; }
.attachment-details .attachment-filename { white-space: normal; overflow: visible; text-overflow: clip; overflow-wrap: anywhere; }
.reader-notice { padding: 10px 12px; border-left: 3px solid var(--accent); background: var(--bg-subtle); margin: 8px 0; font-size: .85rem; line-height: 1.5; }
.reader-notice p { margin: 4px 0; }
.reader-notice .attachment-filename { white-space: normal; overflow-wrap: anywhere; }
.reader-shell .reader-toolbar { position: relative; flex-wrap: wrap; gap: 8px; padding: 8px 10px; overflow: visible; }
.reader-shell .reader-toolbar button, .reader-shell .reader-toolbar input[type="number"], .reader-settings > summary, .reader-settings .tb-check { min-height: 44px; min-width: 44px; }
.reader-shell .tb-pages { gap: 6px; }
.reader-shell .tb-search { flex: 1 1 260px; }
.reader-shell .tb-search-input { width: 100%; min-width: 100px; flex: 1; min-height: 44px; }
.reader-shell .tb-right { margin-left: auto; }
.reader-shell .tb-status { display: none; }
.reader-settings { position: relative; }
.reader-settings > summary { display: flex; align-items: center; padding: 0 10px; border: 1px solid var(--rd-border); border-radius: 6px; background: var(--rd-bg); color: var(--rd-ink); cursor: pointer; box-sizing: border-box; white-space: nowrap; }
.reader-settings > summary::after { content: '⌄'; margin-left: 6px; }
.reader-settings-content { position: absolute; top: calc(100% + 6px); right: 0; z-index: 150; width: 280px; max-width: calc(100vw - 24px); max-height: min(65vh, 420px); overflow-y: auto; box-sizing: border-box; padding: 12px; background: var(--rd-surface); color: var(--rd-ink); border: 1px solid var(--rd-border); border-radius: 8px; box-shadow: var(--shadow-3); display: grid; gap: 10px; }
.reader-settings-content .tb-group { display: flex; flex-wrap: wrap; gap: 8px; }
.reader-settings-content .tb-check { display: flex; align-items: center; gap: 8px; color: var(--rd-ink); }
.reader-shell .reader-body, .reader-shell.side-collapsed .reader-body { grid-template-columns: minmax(0, 1fr); }
.reader-shell .ann-panel { display: none; }
.reader-shell .reader-side { display: none; }
.reader-shell.side-open .reader-side { display: flex; }
.reader-shell.ann-open .ann-panel { display: flex; }
.reader-shell .ann-close { display: inline-block; }
.reader-shell #btn-ann { display: inline-block; }
.reader-shell[data-logged-in="0"] .ann-tools,
.reader-shell[data-logged-in="0"] .ann-filter,
.reader-shell[data-logged-in="0"] .ann-result-count,
.reader-shell[data-logged-in="0"] .ann-list,
.reader-shell[data-logged-in="0"] #ann-count { display: none; }
.reader-shell .ann-hint { font-size: .85rem; padding: 10px 12px; line-height: 1.6; }
.reader-shell .ann-hint a { display: inline-flex; align-items: center; min-height: 44px; }
.reader-shell :focus-visible, .doc-disclosure > summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
body.library-reading .zoom-menu { position: fixed; max-height: min(60vh, 400px); overflow-y: auto; }
@media (min-width: 1021px) {
  .reader-shell.side-open .reader-body { grid-template-columns: 208px minmax(0, 1fr); }
  .reader-shell.ann-open .reader-body, .reader-shell.side-collapsed.ann-open .reader-body { grid-template-columns: minmax(0, 1fr) 290px; }
}
@media (max-width: 1020px) {
  .reader-shell .reader-body, .reader-shell.side-collapsed .reader-body { grid-template-columns: minmax(0, 1fr); }
  .reader-shell .reader-side, .reader-shell .ann-panel { max-width: calc(100vw - 16px); }
  .reader-shell .side-collapse { display: block; min-height: 44px; }
}
@media (max-width: 700px) {
  body.library-reading .doc-header { display: block; }
  body.library-reading .doc-header-actions { margin-top: 10px; }
  .reader-shell .tb-search { flex: 1 0 100%; order: 3; }
  .reader-shell .tb-right { margin-left: 0; }
  .reader-settings-content { width: 260px; }
}

.reader-settings:not([open]) > .reader-settings-content { display: none; }
.reader-shell.side-collapsed .reader-side { display: none; }
body.library-reading .zoom-menu { z-index: 170; }