/* Hallmark · genre: editorial · macrostructure: Mobile Catalogue + Long Document · tone: app-like archival reading
 * theme: studied-DNA (source: user-provided mobile shelf and reader images) · paper warm-white / eye-green · accent cinnabar · studied: yes
 * nav: N9 edge-aligned shelf / compact reader chrome · footer: Ft1 + mobile utility rail · enrichment: Tier-A CSS covers
 * contrast: pass (40–41) · slop: pass (42–45) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (49) · icons: pass (30) · mobile: pass (34, 49, 50–57)
 */
/* Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V4 */
@import url("../tokens.css");

/* 资治通鉴静态站样式 */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  overflow-x: clip;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: var(--reader-leading-mobile);
}

body { min-width: 0; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}
a:active { color: var(--accent-soft); }

mark {
  background: var(--highlight);
  color: var(--ink);
  padding: 0 2px;
  border-radius: 2px;
  font-weight: 600;
}

/* ---- top bar ---- */
.topbar {
  position: static;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas: "brand nav" "search search";
  align-items: center;
  gap: var(--space-2xs) var(--space-xs);
  padding-block: var(--space-2xs);
  padding-inline-start: max(var(--space-sm), env(safe-area-inset-left));
  padding-inline-end: max(var(--space-sm), env(safe-area-inset-right));
  background: var(--color-topbar);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: var(--rule-hairline) solid var(--rule);
}
.topbar .brand {
  grid-area: brand;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 600;
  font-family: var(--font-ui);
  letter-spacing: 0.04em;
  color: var(--ink);
  font-size: 13px;
  white-space: nowrap;
}
.topbar .topnav {
  grid-area: nav;
  display: flex;
  gap: var(--space-xs);
  margin-inline-start: auto;
  white-space: nowrap;
  font-family: var(--font-ui);
}
.topbar .topnav a[href="../index.html"],
.topbar .topnav a[target="_blank"] { display: none; }
.topbar .topnav .mobile-secondary { display: none; }
.topbar .topnav a {
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1;
  white-space: nowrap;
}
.topbar .topnav a:hover { color: var(--accent); text-decoration: none; }

.search-wrap {
  grid-area: search;
  min-width: 0;
  max-width: 480px;
  position: relative;
}
#search-input {
  width: 100%;
  min-height: 44px;
  padding: 8px 14px;
  font-family: var(--font-ui);
  font-size: 15px;
  color: var(--ink);
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-card);
  outline: 2px solid transparent;
  outline-offset: 1px;
  transition: border-color var(--dur-short) var(--ease-out), box-shadow var(--dur-short) var(--ease-out);
}
#search-input:focus-visible { outline-color: var(--color-focus); }
#search-input:focus {
  border-color: var(--accent-soft);
  box-shadow: 0 0 0 3px var(--color-focus-wash);
}
#search-input:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--quote-bg);
}

/* ---- search results panel ---- */
.search-panel {
  position: fixed;
  top: calc(var(--topbar-height, 7rem) + var(--space-2xs));
  left: 50%;
  transform: translateX(-50%);
  width: min(720px, calc(100% - 2rem));
  max-height: calc(100dvh - var(--topbar-height, 7rem) - 1.5rem);
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius-panel);
  box-shadow: 0 8px 32px var(--color-shadow);
  display: none;
  z-index: 100;
}
.search-panel.open { display: block; }
.search-panel-meta {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--rule);
  background: var(--bg);
}
.search-results {
  list-style: none;
  margin: 0;
  padding: 0;
}
.search-results li {
  border-bottom: 1px solid var(--rule);
}
.search-results li:last-child { border-bottom: none; }
.search-results li a {
  display: block;
  padding: 12px 16px;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.7;
}
.search-results li a:hover {
  background: var(--hover);
  text-decoration: none;
}
.r-loc {
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.r-juan { color: var(--accent); font-weight: 600; }
.r-sec { color: var(--ink-soft); }
.r-snippet {
  color: var(--ink);
  font-size: 15px;
}
.r-num {
  display: inline-block;
  padding: 0 6px;
  margin-right: 6px;
  background: var(--num);
  color: var(--color-accent-ink);
  font-size: 11px;
  font-weight: 600;
  border-radius: 3px;
  vertical-align: 1px;
}

/* ---- juan layout (sidebar + content) ---- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-md);
  max-width: 1240px;
  margin: 0 auto;
  padding-block: var(--space-sm) max(3.75rem, env(safe-area-inset-bottom));
  padding-inline-start: max(var(--space-sm), env(safe-area-inset-left));
  padding-inline-end: max(var(--space-sm), env(safe-area-inset-right));
}

aside.toc {
  position: static;
  align-self: start;
  max-height: none;
  overflow: visible;
  font-size: 15px;
  padding-block-end: var(--space-sm);
  border-block-end: var(--rule-hairline) solid var(--rule);
}
aside.toc h3 {
  display: none;
  margin: 0 0 16px;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}
.toc-toggle {
  width: 100%;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  border: var(--rule-hairline) solid var(--rule-strong);
  border-radius: var(--radius-card);
  background: var(--bg-card);
  color: var(--ink);
  font: 600 var(--text-sm)/1.4 var(--font-ui);
  letter-spacing: 0.08em;
  cursor: pointer;
  white-space: nowrap;
}
.toc-toggle__state { color: var(--accent); font-weight: 400; }
.toc-toggle:active { transform: translateY(1px); }
.toc-toggle:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--quote-bg);
}
aside.toc[data-collapsed="true"] ul { display: none; }
aside.toc[data-collapsed="false"] .toc-toggle { margin-block-end: var(--space-xs); }
aside.toc ul { list-style: none; padding: 0; margin: 0; }
aside.toc li { margin: 0; padding: 0; }
aside.toc li a {
  display: block;
  padding: 6px 10px;
  color: var(--ink-soft);
  border-radius: 4px;
  line-height: 1.5;
}
aside.toc li a:hover { background: var(--hover); color: var(--accent); text-decoration: none; }
aside.toc .toc-l3 { padding-left: 14px; font-size: 15px; }
aside.toc .toc-l4 { padding-left: 28px; font-size: 14px; color: var(--ink-faint); }

article.content {
  min-width: 0;
  width: 100%;
  max-width: var(--reader-measure);
}

.crumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  min-width: 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.crumbs a,
.crumbs span { white-space: nowrap; }
.crumbs a { color: var(--ink-soft); }

.juan-title {
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 7vw, 2.5rem);
  font-style: normal;
  font-weight: 600;
  margin: 0 0 10px;
  line-height: 1.3;
  letter-spacing: 0.04em;
}

.preamble {
  margin: var(--space-sm) 0 var(--space-lg);
  padding: var(--space-xs) var(--space-sm);
  background: var(--quote-bg);
  border-left: 3px solid var(--rule-strong);
  color: var(--ink-soft);
  font-style: normal;
  font-size: 16px;
  border-radius: 0 4px 4px 0;
}

.reader-loading,
.reader-error {
  max-width: 42rem;
  padding-block: var(--space-sm) var(--space-xl);
}
.reader-loading p,
.reader-error p {
  margin-block: 0 var(--space-md);
  text-indent: 0;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}
.reader-loading__line {
  display: block;
  width: 100%;
  height: 0.75rem;
  margin-block: var(--space-xs);
  border-radius: var(--radius-card);
  background: var(--rule);
}
.reader-loading__line--short { width: 68%; }
.reader-error {
  border-block-start: var(--rule-hairline) solid var(--rule-strong);
}
.reader-error .reader-button { margin-inline-end: var(--space-sm); }
.reader-error > a {
  display: inline-block;
  min-height: 44px;
  padding-block: var(--space-xs);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}
.toc-loading,
.toc-empty {
  padding: var(--space-xs) var(--space-sm);
  color: var(--ink-faint);
  font-family: var(--font-ui);
}

article h2 {
  min-width: 0;
  overflow-wrap: anywhere;
  margin: var(--space-xl) 0 var(--space-sm);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule-strong);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 5vw, 1.75rem);
  font-style: normal;
  font-weight: 600;
  color: var(--ink);
}

article h3 {
  min-width: 0;
  overflow-wrap: anywhere;
  margin: var(--space-lg) 0 var(--space-xs);
  font-family: var(--font-display);
  font-size: clamp(1.08rem, 4.5vw, 1.375rem);
  font-style: normal;
  font-weight: 600;
  color: var(--accent);
  padding-left: 14px;
  border-left: 4px solid var(--accent-soft);
}

article h4 {
  margin: 28px 0 12px;
  font-size: 18px;
  color: var(--ink-soft);
}

article p {
  margin: 0 0 16px;
  text-align: start;
  text-justify: auto;
  text-indent: 2em;
  overflow-wrap: anywhere;
  word-break: normal;
  hanging-punctuation: first allow-end last;
}

article p.numbered-paragraph {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  column-gap: var(--space-xs);
  text-indent: 0;
}

article p.numbered-paragraph .paragraph-text {
  min-width: 0;
}

article p .num {
  display: inline-block;
  min-width: 1.8em;
  margin: 0;
  padding: 0 0.45em;
  border-radius: 3px;
  background: var(--num);
  color: var(--color-accent-ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
  text-indent: 0;
  vertical-align: 1px;
  letter-spacing: 0.05em;
}

/* ---- 校刊记 (校勘记) ---- */
.校-divider {
  margin: 64px 0 18px;
  border: none;
  border-top: 1px dashed var(--rule-strong);
}
.校-h {
  font-size: 20px !important;
  color: var(--ink-soft) !important;
  border-bottom: none !important;
  margin: 0 0 18px !important;
}
.校-item {
  background: var(--校-bg);
  padding: 10px 16px 10px 14px;
  margin: 8px 0;
  border-radius: 4px;
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.7;
  text-indent: 0;
}
.校-num {
  display: inline-block;
  min-width: 1.8em;
  margin-right: 10px;
  padding: 0 0.45em;
  background: var(--校-num-bg);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  border-radius: 3px;
  text-align: center;
}

/* ---- meta footer ---- */
.meta {
  margin-top: 72px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-size: 14px;
  color: var(--ink-faint);
}
.meta p { text-indent: 0; margin: 6px 0; }
.meta code {
  background: var(--rule);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 13px;
}

/* ---- index page ---- */
.index-layout {
  max-width: 1100px;
  margin: 0 auto;
  padding-block: var(--space-lg) max(3.75rem, env(safe-area-inset-bottom));
  padding-inline-start: max(var(--space-sm), env(safe-area-inset-left));
  padding-inline-end: max(var(--space-sm), env(safe-area-inset-right));
}
.hero {
  text-align: center;
  padding: var(--space-sm) 0 var(--space-lg);
  border-bottom: 1px solid var(--rule);
}
.hero h1 {
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-style: normal;
  font-weight: 700;
  margin: 0 0 14px;
  letter-spacing: 0.08em;
  color: var(--accent);
}
.hero-sub {
  font-size: var(--text-md);
  color: var(--ink-soft);
  letter-spacing: 0.06em;
  margin: 0 0 26px;
}
.hero-meta { font-size: 15px; color: var(--ink-faint); margin: 0 0 8px; }
.hero-stats { font-size: 15px; color: var(--ink-soft); margin: 14px 0 0; }
.hero-stats strong { color: var(--accent); font-size: 17px; }

/* ---- 纪 sections (grouped index) ---- */
.ji-section {
  margin: 48px 0 0;
  padding: 28px 0 0;
  border-top: 1px solid var(--rule);
}
.ji-section:first-of-type { border-top: none; padding-top: 16px; }
.hero + .ji-section {
  margin-block-start: var(--space-lg);
  padding-block-start: var(--space-md);
  border-block-start: none;
}

.ji-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: var(--space-3xs);
  margin: 0 0 22px;
  flex-wrap: wrap;
}
.ji-name {
  min-width: 0;
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-size: 24px;
  font-style: normal;
  font-weight: 700;
  color: var(--accent);
  margin: 0;
  letter-spacing: 0.08em;
}
.ji-range {
  font-size: 14px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
}
.ji-years {
  font-size: 14px;
  color: var(--ink-soft);
  font-style: normal;
}
.ji-progress {
  width: fit-content;
  margin-inline-start: 0;
  font-size: 13px;
  color: var(--ink-faint);
  background: var(--bg-card);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--rule);
}

.juan-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}
.juan-grid li.ok a {
  display: flex;
  flex-direction: column;
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  color: var(--ink);
  transition: transform var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), box-shadow var(--dur-short) var(--ease-out);
}
.juan-grid li.ok a:active { transform: translateY(1px); }
.juan-grid li.missing {
  display: flex;
  flex-direction: column;
  padding: 12px 14px;
  background: transparent;
  border: 1px dashed var(--rule);
  border-radius: 6px;
  color: var(--ink-faint);
  opacity: 0.6;
}
.juan-grid .jn {
  font-size: 13px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.juan-grid li.ok .jn { color: var(--ink-faint); }
.juan-grid .jl {
  font-size: 17px;
  font-weight: 600;
  margin: 3px 0;
  color: var(--ink);
}
.juan-grid li.missing .jl { color: var(--ink-faint); }
.juan-grid .jp {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.5;
}
.juan-grid li.missing .jp { color: var(--ink-faint); font-style: italic; }

@media (min-width: 40rem) {
  html, body { font-size: 18px; }
  .topbar {
    padding-inline-start: max(var(--space-md), env(safe-area-inset-left));
    padding-inline-end: max(var(--space-md), env(safe-area-inset-right));
  }
  .topbar .brand { font-size: 14px; }
  .topbar .topnav a[href="../index.html"] { display: inline; }
  .topbar .topnav .mobile-secondary { display: inline; }
  .topbar .topnav a { font-size: 13px; }
  .layout,
  .index-layout {
    padding-inline-start: max(var(--space-md), env(safe-area-inset-left));
    padding-inline-end: max(var(--space-md), env(safe-area-inset-right));
  }
  .juan-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ji-header { grid-template-columns: auto auto minmax(0, 1fr) auto; align-items: baseline; gap: var(--space-xs); }
  .ji-progress { margin-inline-start: auto; }
}

/* ---- multi-book library catalogue ---- */
.library-page {
  min-height: 100dvh;
  font-family: var(--font-body);
}

.library-masthead {
  display: grid;
  gap: var(--space-2xs);
  padding-block: var(--space-md) 0;
  padding-inline-start: max(var(--space-sm), env(safe-area-inset-left));
  padding-inline-end: max(var(--space-sm), env(safe-area-inset-right));
  text-align: center;
}

.mast-line {
  margin: 0;
  color: var(--ink-faint);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.mast-name {
  min-width: 0;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 10vw, 4rem);
  font-weight: 700;
  font-style: normal;
  line-height: 1.05;
  letter-spacing: 0.06em;
  overflow-wrap: anywhere;
}
.mast-name:hover { color: var(--accent); text-decoration: none; }

.mast-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-block-start: var(--space-2xs);
}
.mast-nav a {
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  line-height: 1;
  white-space: nowrap;
}
.mast-nav a:active { color: var(--accent); }

.mast-rule {
  height: var(--space-2xs);
  margin-block-start: var(--space-sm);
  border-block-start: var(--rule-hairline) solid var(--rule-strong);
  border-block-end: var(--rule-hairline) solid var(--rule-strong);
}

.library-layout {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-block: var(--space-xl) var(--space-3xl);
  padding-inline-start: max(var(--space-sm), env(safe-area-inset-left));
  padding-inline-end: max(var(--space-sm), env(safe-area-inset-right));
}

.library-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: end;
  padding-block-end: var(--space-xl);
}
.library-intro h1 {
  min-width: 0;
  margin: 0 0 var(--space-xs);
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 7vw, 2.5rem);
  font-style: normal;
  line-height: 1.15;
  overflow-wrap: anywhere;
}
.library-intro p {
  max-width: 58ch;
  margin: 0;
  color: var(--ink-soft);
}

.library-search-wrap {
  display: grid;
  gap: var(--space-2xs);
  font-family: var(--font-ui);
}
.library-search-wrap label {
  color: var(--ink-soft);
  font-size: var(--text-sm);
}
#library-search {
  width: 100%;
  min-height: 48px;
  padding: var(--space-xs) var(--space-sm);
  color: var(--ink);
  background: var(--bg-card);
  border: var(--rule-hairline) solid var(--rule-strong);
  border-radius: var(--radius-card);
  outline: 2px solid transparent;
  outline-offset: 1px;
  font: inherit;
  transition: border-color var(--dur-short) var(--ease-out);
}
#library-search:focus-visible { outline-color: var(--color-focus); }
#library-search::placeholder { color: var(--ink-faint); opacity: 1; }
#library-search:active { border-color: var(--accent-soft); }
#library-search:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--quote-bg);
}
.library-search-result {
  min-height: 1lh;
  color: var(--ink-faint) !important;
  font-size: var(--text-sm);
}

.library-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
  scroll-margin-top: var(--space-lg);
}

.book-card {
  min-width: 0;
  max-width: 34rem;
}
.book-card__surface {
  display: grid;
  min-width: 0;
  height: 100%;
  color: var(--ink);
  background: var(--bg-card);
  border: var(--rule-hairline) solid var(--rule-strong);
  border-radius: var(--radius-card);
  overflow: clip;
  transition: border-color var(--dur-short) var(--ease-out);
}
.book-card__surface:hover { text-decoration: none; }
.book-card__surface:active { border-color: var(--accent); }

.book-card__cover {
  aspect-ratio: 4 / 3;
  display: grid;
  place-content: center;
  gap: var(--space-2xs);
  padding: var(--space-lg);
  text-align: center;
  background: var(--quote-bg);
  border-block-end: var(--rule-hairline) solid var(--rule-strong);
}
.book-card__cover strong {
  color: var(--accent);
  font-family: var(--font-display);
  font-size: clamp(2rem, 10vw, 3.25rem);
  font-style: normal;
  line-height: 1.05;
  letter-spacing: 0.08em;
}
.book-card__cover > span {
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
}
.book-card__traditional { font-variant-caps: all-small-caps; }

.book-card__body {
  display: grid;
  align-content: start;
  gap: var(--space-sm);
  min-width: 0;
  padding: var(--space-lg);
}
.book-card__category {
  margin: 0;
  color: var(--ink-faint);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}
.book-card__body h2 {
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: normal;
  line-height: 1.2;
  overflow-wrap: anywhere;
}
.book-card__body > p:not(.book-card__category) {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--text-md);
  line-height: 1.75;
}
.book-card__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-xs);
  margin: var(--space-xs) 0 0;
  font-family: var(--font-ui);
  font-variant-numeric: tabular-nums;
}
.book-card__facts div { min-width: 0; }
.book-card__facts dt {
  color: var(--ink-faint);
  font-size: var(--text-xs);
}
.book-card__facts dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--text-sm);
  overflow-wrap: anywhere;
}
.book-card__action {
  width: fit-content;
  margin-block-start: var(--space-xs);
  padding-block-end: var(--space-3xs);
  color: var(--accent);
  border-block-end: var(--rule-hairline) solid var(--accent-soft);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  white-space: nowrap;
}

.library-empty {
  margin: var(--space-xl) 0 0;
  padding-block: var(--space-lg);
  color: var(--ink-soft);
  border-block: var(--rule-hairline) solid var(--rule);
}

.library-footer {
  display: grid;
  gap: var(--space-xs);
  padding-block: var(--space-xl) max(var(--space-lg), env(safe-area-inset-bottom));
  padding-inline-start: max(var(--space-sm), env(safe-area-inset-left));
  padding-inline-end: max(var(--space-sm), env(safe-area-inset-right));
  color: var(--ink-soft);
  background: var(--quote-bg);
  border-block-start: var(--rule-hairline) solid var(--rule-strong);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}
.library-footer p { max-width: 65ch; margin: 0; }
.library-footer__wordmark {
  color: var(--ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
}
.compact-footer { margin-block-start: var(--space-2xl); }

.book-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  margin-block-end: var(--space-md);
  color: var(--ink-faint);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}
.book-breadcrumb a,
.book-breadcrumb span { white-space: nowrap; }
.book-breadcrumb a { color: var(--ink-soft); }
.book-start {
  display: inline-block;
  margin-block-start: var(--space-md);
  padding-block-end: var(--space-3xs);
  color: var(--accent);
  border-block-end: var(--rule-hairline) solid var(--accent-soft);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  white-space: nowrap;
}
.book-hero {
  max-width: 48rem;
  text-align: start;
}
.book-hero .hero-meta,
.book-hero .hero-stats { max-width: 65ch; }

/* ---- local reader state and tools ---- */
html[data-reader-theme="day"] { color-scheme: light; }
html[data-reader-theme="night"] { color-scheme: dark; }
html[data-reader-width="narrow"] { --reader-measure: var(--reader-measure-narrow); }
html[data-reader-width="standard"] { --reader-measure: var(--reader-measure-standard); }
html[data-reader-width="wide"] { --reader-measure: var(--reader-measure-wide); }

article.content {
  font-size: var(--reader-font-size, 100%);
  line-height: var(--reader-line-height, var(--reader-leading-mobile));
}

body[data-page-kind="reader"] .layout {
  padding-block-end: max(var(--space-3xl), calc(env(safe-area-inset-bottom) + var(--space-2xl)));
}

.reading-progress {
  --reader-progress-scale: 0;
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  height: var(--space-3xs);
  overflow: clip;
  background: var(--rule);
  color: var(--ink);
  z-index: var(--z-sticky);
  pointer-events: none;
}
.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--accent);
  color: var(--color-accent-ink);
  transform: scaleX(var(--reader-progress-scale));
  transform-origin: left center;
}

.reader-tools {
  position: fixed;
  inset-inline: max(var(--space-xs), env(safe-area-inset-left)) max(var(--space-xs), env(safe-area-inset-right));
  inset-block-end: max(var(--space-xs), env(safe-area-inset-bottom));
  z-index: var(--z-sticky);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2xs);
  width: min(30rem, calc(100% - (var(--space-xs) * 2)));
  margin-inline: auto;
  padding: var(--space-2xs);
  background: var(--bg-card);
  color: var(--ink);
  border: var(--rule-hairline) solid var(--rule-strong);
  border-radius: var(--radius-panel);
  box-shadow: 0 8px 32px var(--color-shadow);
}

.reader-button {
  min-width: 0;
  min-height: 44px;
  padding: var(--space-2xs) var(--space-xs);
  border: var(--rule-hairline) solid var(--rule-strong);
  border-radius: var(--radius-card);
  outline: 2px solid transparent;
  outline-offset: 2px;
  background: var(--bg-card);
  color: var(--ink);
  font: 600 var(--text-sm)/1 var(--font-ui);
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out),
              color var(--dur-short) var(--ease-out),
              transform var(--dur-short) var(--ease-out);
}
.reader-button:focus-visible {
  outline-color: var(--color-focus);
}
.reader-button:active {
  transform: translateY(1px);
}
.reader-button:disabled,
.reader-button[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--quote-bg);
  color: var(--ink-faint);
}
.reader-button[data-state="loading"] {
  opacity: 0.72;
  cursor: wait;
}
.reader-button[data-state="error"] {
  border-color: var(--color-error);
  color: var(--color-error);
}
.reader-button[data-state="success"] {
  border-color: var(--color-success);
  color: var(--color-success);
}
.reader-button--quiet {
  background: var(--bg);
  color: var(--ink-soft);
}

.reader-dialog {
  position: fixed;
  inset: 0;
  width: min(42rem, calc(100% - (var(--space-sm) * 2)));
  height: fit-content;
  max-height: calc(100dvh - (var(--space-sm) * 2));
  margin: auto;
  padding: 0;
  overflow: auto;
  overscroll-behavior: contain;
  border: var(--rule-hairline) solid var(--rule-strong);
  border-radius: var(--radius-panel);
  background: var(--bg-card);
  color: var(--ink);
  box-shadow: 0 16px 48px var(--color-shadow);
  z-index: var(--z-modal);
}
.reader-dialog:not([open]) { display: none; }
.reader-dialog::backdrop { background: var(--color-backdrop); }
.reader-dialog__inner { padding: var(--space-sm); }
.reader-dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-block-end: var(--space-sm);
  border-block-end: var(--rule-hairline) solid var(--rule);
}
.reader-dialog__header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: normal;
  line-height: 1.2;
}
.reader-dialog__header p {
  margin: var(--space-2xs) 0 0;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  line-height: 1.5;
}
.reader-settings,
.reader-bookmarks { padding-block: var(--space-sm); }
.reader-settings { border-block-end: var(--rule-hairline) solid var(--rule); }
.reader-settings h3,
.reader-bookmarks h3 {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: normal;
  line-height: 1.25;
}
.reader-settings fieldset {
  min-width: 0;
  margin: 0 0 var(--space-sm);
  padding: 0;
  border: 0;
}
.reader-settings legend,
.reader-range-field > label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-block-end: var(--space-2xs);
  color: var(--ink-soft);
  font: 600 var(--text-sm)/1.4 var(--font-ui);
}
.reader-range-field { margin-block-end: var(--space-sm); }
.reader-range-field output {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.reader-range-field input[type="range"] {
  width: 100%;
  min-height: 44px;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}
.reader-range-field input[type="range"]:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.reader-choice-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2xs);
}
.reader-choice-grid label {
  min-width: 0;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  padding: var(--space-2xs) var(--space-xs);
  border: var(--rule-hairline) solid var(--rule);
  border-radius: var(--radius-card);
  background: var(--bg);
  color: var(--ink);
  font: var(--text-sm)/1.4 var(--font-ui);
  white-space: nowrap;
  cursor: pointer;
}
.reader-choice-grid label:focus-within {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}
.reader-choice-grid label:has(input:checked) {
  border-color: var(--accent-soft);
  color: var(--accent);
}
.reader-choice-grid input { accent-color: var(--accent); }
.reader-choice-grid input:disabled + span,
.reader-choice-grid label:has(input:disabled) {
  opacity: 0.55;
  cursor: not-allowed;
}

.reader-bookmarks__heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-block-end: var(--space-xs);
}
.reader-bookmarks__heading h3 { margin: 0; }
#reader-bookmarks-list {
  list-style: none;
  display: grid;
  gap: var(--space-2xs);
  margin: 0;
  padding: 0;
}
.reader-bookmark {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2xs);
  padding-block: var(--space-2xs);
  border-block-end: var(--rule-hairline) solid var(--rule);
}
.reader-bookmark a {
  min-width: 0;
  display: grid;
  gap: var(--space-3xs);
  color: var(--ink);
}
.reader-bookmark__location {
  color: var(--accent);
  font: 600 var(--text-sm)/1.3 var(--font-ui);
  font-variant-numeric: tabular-nums;
}
.reader-bookmark__excerpt {
  color: var(--ink-soft);
  font-size: var(--text-sm);
  line-height: 1.55;
  overflow-wrap: anywhere;
}
.reader-bookmarks__empty {
  padding: var(--space-sm);
  background: var(--quote-bg);
  color: var(--ink-soft);
  border-radius: var(--radius-card);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  line-height: 1.55;
}
.reader-bookmarks__empty p { margin: 0; }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

body:has(.reader-dialog[open]) { overflow-y: hidden; }

@media (min-width: 40rem) {
  .reader-choice-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .reader-dialog__inner { padding: var(--space-md); }
}

@media (min-width: 55rem) {
  .reader-tools {
    inset-inline: auto max(var(--space-sm), env(safe-area-inset-right));
    width: 9rem;
    grid-template-columns: minmax(0, 1fr);
    margin-inline: 0;
  }
}

@media (hover: hover) and (pointer: fine) {
  .reader-button:hover,
  .reader-choice-grid label:hover {
    background: var(--hover);
    color: var(--accent);
  }
  .reader-bookmark a:hover { color: var(--accent); text-decoration: none; }
}

@media print {
  .reading-progress,
  .reader-tools,
  .reader-dialog { display: none !important; }
}

@media (min-width: 40rem) {
  .library-masthead,
  .library-layout,
  .library-footer {
    padding-inline-start: max(var(--space-md), env(safe-area-inset-left));
    padding-inline-end: max(var(--space-md), env(safe-area-inset-right));
  }
  .library-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .book-card { max-width: none; }
}

@media (min-width: 55rem) {
  .library-intro { grid-template-columns: minmax(0, 1.4fr) minmax(18rem, 0.6fr); }
  .library-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .library-footer { grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr) auto; align-items: baseline; }
}

@media (hover: hover) and (pointer: fine) {
  #library-search:hover { border-color: var(--accent-soft); }
  .book-card__surface:hover { border-color: var(--accent-soft); }
  .mast-nav a:hover,
  .book-breadcrumb a:hover { color: var(--accent); text-decoration: none; }
}

@media (pointer: coarse) {
  .mast-nav a,
  .book-start,
  .book-card__action { min-height: 44px; display: inline-flex; align-items: center; }
}

@media (min-width: 55rem) {
  html, body { font-size: 19px; line-height: var(--reader-leading-wide); }
  .topbar {
    position: sticky;
    display: flex;
    gap: var(--space-md);
    padding: 14px 32px;
  }
  .topbar .brand { font-size: 15px; }
  .topbar .topnav { gap: 18px; }
  .topbar .topnav a,
  .topbar .topnav a[href="../index.html"],
  .topbar .topnav a[target="_blank"] { display: inline; font-size: 14px; }
  .search-wrap { flex: 1; }
  .layout {
    grid-template-columns: 260px minmax(0, 1fr);
    padding: 36px 32px 96px;
    gap: 56px;
  }
  aside.toc {
    position: sticky;
    top: calc(var(--topbar-height, 4.5rem) + var(--space-xs));
    max-height: calc(100dvh - var(--topbar-height, 4.5rem) - var(--space-lg));
    overflow-y: auto;
    padding-inline-end: 14px;
    padding-block-end: 0;
    border-inline-end: var(--rule-hairline) solid var(--rule);
    border-block-end: none;
  }
  aside.toc h3 { display: block; }
  aside.toc ul,
  aside.toc[data-collapsed="true"] ul { display: block; }
  .toc-toggle { display: none; }
  .juan-title { font-size: 40px; }
  .preamble { margin: 22px 0 36px; padding: 16px 22px; }
  article h2 { margin: 56px 0 18px; font-size: 28px; }
  article h3 { margin: 40px 0 16px; font-size: 22px; }
  .index-layout { padding: 56px 32px 96px; }
  .hero { padding: 36px 0 56px; }
  .hero-sub { font-size: 20px; }
  .ji-header { gap: 18px; }
  .ji-name { font-size: 30px; }
  .juan-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
}

@media (hover: hover) and (pointer: fine) {
  #search-input:hover { border-color: var(--rule-strong); }
  .juan-grid li.ok a:hover {
    border-color: var(--accent-soft);
    box-shadow: 0 2px 12px var(--color-card-shadow);
    text-decoration: none;
    transform: translateY(-1px);
  }
  .toc-toggle:hover { border-color: var(--accent-soft); }
}

@media (pointer: coarse) {
  .topbar .topnav a { min-height: 44px; }
  .juan-grid li.ok a { min-height: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 50ms !important;
    animation-duration: 50ms !important;
  }
}

/* ---- studied mobile shelf + immersive reader ---- */
[hidden] { display: none !important; }

.library-page {
  padding-block-end: calc(var(--space-3xl) + env(safe-area-inset-bottom));
  background: var(--color-card);
  font-family: var(--font-ui);
}

.library-appbar {
  position: sticky;
  inset-block-start: 0;
  z-index: var(--z-sticky-nav);
  display: grid;
  gap: var(--space-sm);
  padding-block: max(var(--space-sm), env(safe-area-inset-top)) var(--space-sm);
  padding-inline-start: max(var(--space-sm), env(safe-area-inset-left));
  padding-inline-end: max(var(--space-sm), env(safe-area-inset-right));
  background: var(--color-topbar);
  color: var(--ink);
  border-block-end: var(--rule-hairline) solid var(--rule);
  backdrop-filter: saturate(140%) blur(var(--space-xs));
}

.library-appbar__title-row,
.library-appbar__status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.library-appbar__brand {
  margin: 0 0 var(--space-3xs);
  color: var(--ink-faint);
  font-size: var(--text-xs);
  line-height: 1;
  letter-spacing: 0.08em;
}

.library-appbar__title {
  display: block;
  min-width: 0;
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--text-2xl);
  font-weight: 700;
  font-style: normal;
  line-height: 1.1;
  letter-spacing: -0.03em;
  overflow-wrap: anywhere;
}
.library-appbar__title:hover { color: var(--ink); text-decoration: none; }

.library-appbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
}

.library-icon-button,
.reader-icon-button {
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: var(--rule-hairline) solid transparent;
  border-radius: var(--radius-card);
  outline: 2px solid transparent;
  outline-offset: 1px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out),
              color var(--dur-short) var(--ease-out),
              transform var(--dur-short) var(--ease-out);
}
.library-icon-button svg,
.reader-icon-button svg,
.reader-back svg,
.reader-scrubber__step svg,
.reader-tool-row svg,
.library-bottom-nav svg {
  width: var(--space-md);
  height: var(--space-md);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.library-icon-button:focus-visible,
.reader-icon-button:focus-visible { outline-color: var(--color-focus); }
.library-icon-button:active,
.reader-icon-button:active { transform: translateY(1px); }
.library-icon-button:disabled,
.reader-icon-button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  background: var(--quote-bg);
}
.library-icon-button[data-state="loading"],
.reader-icon-button[data-state="loading"] { opacity: 0.72; cursor: wait; }
.library-icon-button[data-state="error"],
.reader-icon-button[data-state="error"] { color: var(--color-error); }
.library-icon-button[data-state="success"],
.reader-icon-button[data-state="success"] { color: var(--color-success); }

.library-appbar__status-row p {
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--text-md);
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
}
.library-appbar__status-row strong { color: var(--ink); font-weight: 700; }

.library-filter { position: relative; flex: none; }
.library-filter summary {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding-inline: var(--space-xs);
  border-radius: var(--radius-card);
  outline: 2px solid transparent;
  outline-offset: 1px;
  color: var(--ink-soft);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  list-style: none;
}
.library-filter summary::-webkit-details-marker { display: none; }
.library-filter summary::before { content: "⌄"; margin-inline-end: var(--space-2xs); color: var(--accent); }
.library-filter summary:focus-visible { outline-color: var(--color-focus); }
.library-filter[open] summary { background: var(--hover); color: var(--ink); }
.library-filter__menu {
  position: absolute;
  inset-block-start: calc(100% + var(--space-2xs));
  inset-inline-end: 0;
  z-index: var(--z-dropdown);
  min-width: 8rem;
  display: grid;
  gap: var(--space-3xs);
  padding: var(--space-2xs);
  background: var(--bg-card);
  color: var(--ink);
  border: var(--rule-hairline) solid var(--rule-strong);
  border-radius: var(--radius-panel);
  box-shadow: 0 var(--space-2xs) var(--space-md) var(--color-shadow);
}
.library-filter__menu button {
  min-height: 44px;
  padding-inline: var(--space-xs);
  border: var(--rule-hairline) solid transparent;
  border-radius: var(--radius-card);
  outline: 2px solid transparent;
  outline-offset: 1px;
  background: transparent;
  color: var(--ink-soft);
  font: 600 var(--text-sm)/1 var(--font-ui);
  text-align: start;
  white-space: nowrap;
  cursor: pointer;
}
.library-filter__menu button[data-active="true"] { background: var(--hover); color: var(--accent); }
.library-filter__menu button:focus-visible { outline-color: var(--color-focus); }
.library-filter__menu button:active { transform: translateY(1px); }
.library-filter__menu button:disabled { opacity: 0.55; cursor: not-allowed; }
.library-filter__menu button[data-state="loading"] { opacity: 0.72; cursor: wait; }
.library-filter__menu button[data-state="error"] { color: var(--color-error); }
.library-filter__menu button[data-state="success"] { color: var(--color-success); }

.library-search-panel {
  display: grid;
  gap: var(--space-2xs);
}
.library-search-panel #library-search {
  min-height: 44px;
  border-color: var(--rule);
  border-radius: var(--radius-panel);
  background: var(--bg-card);
}
.library-search-panel .library-search-result { margin: 0; }

.library-layout {
  max-width: 80rem;
  padding-block: var(--space-md) var(--space-xl);
}
.library-intro { display: none; }

.library-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-lg) var(--space-xs);
  align-items: start;
}
.book-card { max-width: none; }
.book-card__surface {
  display: block;
  border: 0;
  border-radius: 0;
  background: transparent;
  overflow: visible;
}
.book-card__surface:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: var(--space-2xs);
  border-radius: var(--radius-card);
}
.book-card__surface:active { border-color: transparent; }

.book-card__cover {
  position: relative;
  aspect-ratio: 2 / 3;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  align-items: center;
  justify-items: center;
  gap: var(--space-2xs);
  padding: var(--space-xs) var(--space-2xs);
  overflow: clip;
  border: var(--rule-hairline) solid var(--rule-strong);
  border-radius: var(--radius-panel);
  box-shadow: 0 var(--space-3xs) var(--space-2xs) var(--color-card-shadow);
  transition: transform var(--dur-short) var(--ease-out);
}
.book-card__cover::before {
  content: "";
  position: absolute;
  inset: var(--space-2xs);
  border: var(--rule-hairline) solid currentColor;
  border-radius: var(--radius-card);
  opacity: 0.24;
  pointer-events: none;
}
.book-card__cover strong {
  position: relative;
  z-index: var(--z-raised);
  color: inherit;
  font-family: var(--font-display);
  font-size: clamp(var(--text-md), 5.4vw, var(--text-xl));
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0.12em;
  writing-mode: vertical-rl;
  white-space: nowrap;
}
.book-card__cover > span {
  position: relative;
  z-index: var(--z-raised);
  color: inherit;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
}
.book-card__traditional {
  width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
  opacity: 0.76;
}
.book-card__cover-author {
  width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
  opacity: 0.8;
}
.book-card__seal {
  position: absolute !important;
  inset-inline-end: var(--space-xs);
  inset-block-end: var(--space-xs);
  width: var(--space-md);
  height: var(--space-md);
  display: grid;
  place-items: center;
  border: var(--rule-hairline) solid currentColor;
  line-height: 1;
}
.book-card__cover-progress {
  position: absolute !important;
  inset-inline: 0;
  inset-block-end: 0;
  height: var(--space-3xs);
  background: var(--rule);
}
.book-card__cover-progress i {
  display: block;
  width: var(--book-progress, 0%);
  height: 100%;
  background: currentColor;
}
.book-card[data-book-id="zizhi-tongjian"] .book-card__cover { background: var(--color-cover-zztj); color: var(--color-cover-ink-light); }
.book-card[data-book-id="sanguo-yanyi"] .book-card__cover { background: var(--color-cover-sanguo); color: var(--color-cover-ink-dark); }
.book-card[data-book-id="shuihu-zhuan"] .book-card__cover { background: var(--color-cover-shuihu); color: var(--color-cover-ink-light); }
.book-card[data-book-id="honglou-meng"] .book-card__cover { background: var(--color-cover-honglou); color: var(--color-cover-ink-light); }
.book-card[data-book-id="xiyou-ji"] .book-card__cover { background: var(--color-cover-xiyou); color: var(--color-cover-ink-light); }

.book-card__body {
  display: grid;
  gap: var(--space-3xs);
  padding: var(--space-2xs) 0 0;
}
.book-card__body h2 {
  overflow: hidden;
  margin: 0;
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--text-md);
  font-weight: 700;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.book-card__author,
.book-card__progress {
  overflow: hidden;
  margin: 0;
  color: var(--ink-faint) !important;
  font-family: var(--font-ui);
  font-size: var(--text-xs) !important;
  line-height: 1.4 !important;
  text-indent: 0;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.book-card__progress { font-variant-numeric: tabular-nums; }
.book-card__detail { display: none; }

.library-footer {
  padding-block-end: calc(var(--space-3xl) + env(safe-area-inset-bottom));
}
.library-bottom-nav {
  position: fixed;
  inset-inline: 0;
  inset-block-end: 0;
  z-index: var(--z-sticky-nav);
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: var(--space-xs);
  min-height: calc(var(--space-3xl) + env(safe-area-inset-bottom));
  padding-block: var(--space-2xs) max(var(--space-2xs), env(safe-area-inset-bottom));
  padding-inline-start: max(var(--space-sm), env(safe-area-inset-left));
  padding-inline-end: max(var(--space-sm), env(safe-area-inset-right));
  background: var(--color-topbar);
  color: var(--ink-soft);
  border-block-start: var(--rule-hairline) solid var(--rule);
  backdrop-filter: saturate(140%) blur(var(--space-xs));
}
.library-bottom-nav a {
  min-width: 4rem;
  min-height: 44px;
  display: grid;
  place-items: center;
  gap: var(--space-3xs);
  color: var(--ink-faint);
  font-size: var(--text-xs);
  line-height: 1;
  white-space: nowrap;
}
.library-bottom-nav a[aria-current="page"] { color: var(--accent); }
.library-bottom-nav a:hover { text-decoration: none; }

html[data-reader-theme="eye"] body[data-page-kind="reader"] { background: var(--bg); color: var(--ink); }
html[data-reader-theme="eye"] body[data-page-kind="reader"] .reader-tools,
html[data-reader-theme="eye"] body[data-page-kind="reader"] .reader-appbar { background: var(--color-topbar); color: var(--ink); }

.reader-appbar {
  position: sticky;
  inset-block-start: 0;
  z-index: var(--z-sticky-nav);
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas: "brand title toggle" "search search search";
  gap: var(--space-2xs);
  min-height: 3.5rem;
  padding-block: max(var(--space-2xs), env(safe-area-inset-top)) var(--space-2xs);
  background: var(--color-topbar);
}
.reader-appbar .brand {
  grid-area: brand;
  width: auto;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3xs);
  color: var(--ink);
  font-size: var(--text-xs);
  letter-spacing: 0;
}
.reader-appbar__title {
  grid-area: title;
  min-width: 0;
  overflow: hidden;
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.reader-icon-button { grid-area: toggle; }
.reader-appbar .search-wrap {
  grid-area: search;
  display: none;
  width: 100%;
  max-width: none;
}
body[data-reader-search-open="true"] .reader-appbar .search-wrap { display: block; }
.reader-appbar .topnav { display: none; }

body[data-page-kind="reader"] .layout {
  padding-block-start: var(--space-lg);
  padding-block-end: calc(var(--reader-toolbar-height) + var(--space-2xl) + env(safe-area-inset-bottom));
}
body[data-page-kind="reader"] aside.toc {
  position: fixed;
  inset-inline: var(--space-sm);
  inset-block-end: calc(var(--reader-toolbar-height) + var(--space-xs) + env(safe-area-inset-bottom));
  z-index: var(--z-dropdown);
  display: none;
  max-height: min(52dvh, 28rem);
  padding: var(--space-xs);
  overflow-y: auto;
  border: var(--rule-hairline) solid var(--rule-strong);
  border-radius: var(--radius-panel);
  background: var(--bg-card);
  color: var(--ink);
  box-shadow: 0 var(--space-neg-2xs) var(--space-md) var(--color-shadow);
}
body[data-page-kind="reader"] aside.toc[data-collapsed="false"] { display: block; }
body[data-page-kind="reader"] article.content { margin-inline: auto; }
body[data-page-kind="reader"] article p { margin-block-end: var(--space-md); }
body[data-page-kind="reader"] .crumbs { margin-block-end: var(--space-xs); }
body[data-page-kind="reader"] .juan-title {
  font-size: clamp(var(--text-xl), 7vw, var(--text-2xl));
  line-height: 1.22;
  letter-spacing: 0.02em;
}
body[data-page-kind="reader"] .preamble { margin-block: var(--space-md) var(--space-xl); }

.reader-tools {
  inset-inline: 0;
  inset-block-end: 0;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2xs);
  margin: 0;
  padding-block: var(--space-2xs) max(var(--space-2xs), env(safe-area-inset-bottom));
  padding-inline-start: max(var(--space-sm), env(safe-area-inset-left));
  padding-inline-end: max(var(--space-sm), env(safe-area-inset-right));
  border: 0;
  border-block-start: var(--rule-hairline) solid var(--rule-strong);
  border-radius: 0;
  background: var(--color-topbar);
  box-shadow: 0 var(--space-neg-2xs) var(--space-md) var(--color-shadow);
  backdrop-filter: saturate(140%) blur(var(--space-xs));
}
.reader-scrubber {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-xs);
}
.reader-scrubber__step {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-card);
  color: var(--ink-soft);
}
.reader-scrubber__step[aria-disabled="true"] { opacity: 0.38; pointer-events: none; }
.reader-scrubber__step:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 1px; }
#reader-progress-range {
  width: 100%;
  min-height: 44px;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}
#reader-progress-range:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 1px; }
#reader-progress-range:disabled { opacity: 0.55; cursor: not-allowed; }
.reader-tool-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-2xs);
}
.reader-tool-row .reader-button {
  min-height: 48px;
  display: grid;
  place-items: center;
  gap: var(--space-3xs);
  padding: var(--space-3xs);
  border-color: transparent;
  background: transparent;
  color: var(--ink-soft);
  font-size: var(--text-xs);
  line-height: 1;
}
.reader-tool-row .reader-button[aria-pressed="true"] { color: var(--accent); }
.reader-tool-row .reader-button svg { width: var(--space-lg); height: var(--space-lg); }
.reader-tool-row .reader-button[data-state="success"] { color: var(--color-success); }
.reader-tool-row .reader-button[data-state="error"] { color: var(--color-error); }

.reader-choice-grid--theme { grid-template-columns: repeat(2, minmax(0, 1fr)); }

@media (min-width: 40rem) {
  .library-appbar,
  .library-layout { padding-inline-start: max(var(--space-md), env(safe-area-inset-left)); padding-inline-end: max(var(--space-md), env(safe-area-inset-right)); }
  .library-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-xl) var(--space-md); }
  .book-card__cover strong { font-size: var(--text-xl); }
  .reader-choice-grid--theme { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 55rem) {
  .library-page { padding-block-end: 0; }
  .library-appbar { position: relative; max-width: 80rem; margin-inline: auto; padding-block: var(--space-lg); border-block-end: 0; backdrop-filter: none; }
  .library-appbar__title { font-size: var(--text-display); font-family: var(--font-display); letter-spacing: 0.04em; }
  .library-appbar__status-row { border-block: var(--rule-hairline) solid var(--rule); padding-block: var(--space-sm); }
  .library-search-panel { max-width: 32rem; }
  .library-intro { display: grid; grid-template-columns: minmax(0, 1fr); padding-block: var(--space-md) var(--space-xl); }
  .library-intro h1 { font-size: var(--text-xl); }
  .library-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .library-bottom-nav { display: none; }
  .library-footer { padding-block-end: var(--space-xl); }

  .reader-appbar {
    display: grid;
    grid-template-columns: auto minmax(10rem, 0.45fr) minmax(18rem, 1fr) auto;
    grid-template-areas: "brand title search nav";
    gap: var(--space-md);
    padding: var(--space-xs) var(--space-lg);
  }
  .reader-appbar .search-wrap { display: block; }
  .reader-appbar .topnav { display: flex; }
  .reader-icon-button { display: none; }
  .reader-appbar__title { text-align: start; }
  body[data-page-kind="reader"] aside.toc,
  body[data-page-kind="reader"] aside.toc[data-collapsed="false"] {
    position: sticky;
    inset-inline: auto;
    inset-block-end: auto;
    display: block;
    max-height: calc(100dvh - var(--topbar-height, 4.5rem) - var(--space-lg));
    padding: 0 var(--space-xs) 0 0;
    overflow-y: auto;
    border: 0;
    border-inline-end: var(--rule-hairline) solid var(--rule);
    border-radius: 0;
    background: transparent;
    box-shadow: none;
  }
  body[data-page-kind="reader"] .layout { padding-block-end: calc(var(--reader-toolbar-height) + var(--space-3xl)); }
  .reader-tools {
    inset-inline: 50% auto;
    inset-block-end: var(--space-sm);
    width: min(40rem, calc(100% - (var(--space-lg) * 2)));
    transform: translateX(-50%);
    border: var(--rule-hairline) solid var(--rule-strong);
    border-radius: var(--radius-panel);
  }
}

@media (hover: hover) and (pointer: fine) {
  .library-icon-button:hover,
  .reader-icon-button:hover,
  .library-filter summary:hover,
  .library-filter__menu button:hover,
  .reader-tool-row .reader-button:hover,
  .reader-scrubber__step:hover { background: var(--hover); color: var(--accent); text-decoration: none; }
  .book-card__surface:hover .book-card__cover { transform: translateY(-1px); }
}

@media print {
  .reader-appbar,
  .library-appbar,
  .library-bottom-nav { display: none !important; }
}

/* Mobile cover collision fix: one clear title inside narrow 2:3 covers. */
.book-card__seal { display: none; }

@media (max-width: 39.999rem) {
  .book-card__cover {
    grid-template-rows: minmax(0, 1fr);
    padding: var(--space-sm) var(--space-xs);
  }
  .book-card__traditional,
  .book-card__cover-author { display: none; }
  .book-card__cover strong {
    max-block-size: 100%;
    max-inline-size: 100%;
    font-size: clamp(var(--text-lg), 5vw, var(--text-xl));
    line-height: 1;
    letter-spacing: 0.08em;
  }
}

@media (min-width: 40rem) {
  .book-card__traditional,
  .book-card__cover-author { display: block; }
  .book-card__cover strong {
    max-block-size: 100%;
    max-inline-size: 100%;
  }
}

/* Immersive mobile reading chrome: tap the text to reveal controls. */
@media (max-width: 54.999rem) {
  .reader-appbar {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
  }
  .reader-appbar,
  .reader-tools,
  .reading-progress {
    transition: transform var(--dur-medium) var(--ease-in-out), opacity var(--dur-short) var(--ease-in-out);
  }
  body.reader-chrome-hidden .reader-appbar {
    opacity: 0;
    pointer-events: none;
    transform: translateY(calc(-100% - var(--space-sm)));
  }
  body.reader-chrome-hidden .reader-tools {
    opacity: 0;
    pointer-events: none;
    transform: translateY(calc(100% + var(--space-sm)));
  }
  body.reader-chrome-hidden .reading-progress { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) and (max-width: 54.999rem) {
  .reader-appbar,
  .reader-tools,
  .reading-progress { transition: none; }
  body.reader-chrome-hidden .reader-appbar,
  body.reader-chrome-hidden .reader-tools { transform: none; }
}