/* Quizzman Ebook Reader — classical texts */

:root {
  --er-bg: #f7f6f3;
  --er-surface: #ffffff;
  --er-ink: #1a1917;
  --er-ink-muted: #5c574e;
  --er-han-ink: #0a0908;
  --er-accent: #2f4f4f;
  --er-highlight: #ffe8a3;
  --er-progress: #2f4f4f;
  --er-border: rgba(26, 25, 23, 0.1);
  --er-font-serif: "Source Serif 4", "Noto Serif", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, serif;
  --er-font-sans: "Source Sans 3", "Noto Sans", "Noto Sans CJK SC", system-ui, sans-serif;
  /* Kaiti stack: LXGW WenKai (web) → system Kai */
  --er-font-kaiti: "LXGW WenKai", "LXGW WenKai TC", "Kaiti SC", "STKaiti", "KaiTi", "DFKai-SB", "BiauKai", "TW-Kai", serif;
  --er-font: var(--er-font-serif);
  --er-size: 1.1875rem;
  --er-han-size: 1.72em;
  --er-leading: 1.75;
  --er-han-leading: 2.05;
  --er-measure: 38rem;
  --er-toc-w: 16.5rem;
  --er-top-h: 3rem;
  --er-bottom-h: 3rem;
}

html[data-er-theme="sepia"] {
  --er-bg: #f1e6d4;
  --er-surface: #f7ecd9;
  --er-ink: #3b2f22;
  --er-ink-muted: #6b5a45;
  --er-han-ink: #1c140c;
  --er-accent: #6b4f2a;
  --er-highlight: #e8c97a;
  --er-progress: #8b6914;
  --er-border: rgba(59, 47, 34, 0.14);
}

html[data-er-theme="dark"],
html[data-theme="dark"] body.page-ebook-reader {
  --er-bg: #1c1b1a;
  --er-surface: #252322;
  --er-ink: #edece9;
  --er-ink-muted: #a39e96;
  --er-han-ink: #f5f2eb;
  --er-accent: #c4a574;
  --er-highlight: #5c4a1f;
  --er-progress: #c4a574;
  --er-border: rgba(237, 236, 233, 0.12);
}

html[data-er-theme="dark"] {
  --er-bg: #1c1b1a;
  --er-surface: #252322;
  --er-ink: #edece9;
  --er-ink-muted: #a39e96;
  --er-han-ink: #f5f2eb;
  --er-accent: #c4a574;
  --er-highlight: #5c4a1f;
  --er-progress: #c4a574;
  --er-border: rgba(237, 236, 233, 0.12);
}

body.page-ebook-reader {
  margin: 0;
  background: var(--er-bg);
  color: var(--er-ink);
  font-family: var(--er-font-sans);
}

body.page-ebook-reader .er-main {
  margin: 0;
  padding: 0;
  max-width: none;
  min-height: 100vh;
}

.er-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

.er-topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--er-top-h);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 0.85rem;
  background: color-mix(in srgb, var(--er-surface) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--er-border);
}

.er-topbar a {
  color: inherit;
  text-decoration: none;
}

.er-icon-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--er-ink-muted);
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.er-icon-btn:hover,
.er-icon-btn[aria-pressed="true"] {
  color: var(--er-accent);
  background: color-mix(in srgb, var(--er-accent) 12%, transparent);
}

.er-crumb {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  font-size: 0.875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.er-crumb strong {
  font-weight: 600;
  color: var(--er-ink);
}

.er-crumb span {
  color: var(--er-ink-muted);
}

.er-mode-switch {
  display: none;
  gap: 0.2rem;
  align-items: center;
}

@media (min-width: 900px) {
  .er-mode-switch { display: flex; }
}

.er-mode-switch button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--er-ink-muted);
  font-size: 0.75rem;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  cursor: pointer;
  text-transform: capitalize;
}

.er-mode-switch button[aria-pressed="true"] {
  color: var(--er-accent);
  background: color-mix(in srgb, var(--er-accent) 14%, transparent);
  font-weight: 600;
}

.er-body {
  flex: 1;
  display: flex;
  min-height: 0;
  position: relative;
}

.er-toc {
  width: var(--er-toc-w);
  flex-shrink: 0;
  border-right: 1px solid var(--er-border);
  background: var(--er-surface);
  display: none;
  flex-direction: column;
  max-height: calc(100dvh - var(--er-top-h) - var(--er-bottom-h));
  position: sticky;
  top: var(--er-top-h);
  overflow: hidden;
}

.er-shell[data-toc="open"] .er-toc {
  display: flex;
}

@media (min-width: 1024px) {
  .er-toc { display: flex; }
  .er-shell[data-toc="closed"] .er-toc { display: none; }
}

.er-toc-head {
  padding: 0.85rem 1rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--er-ink-muted);
}

.er-toc-list {
  list-style: none;
  margin: 0;
  padding: 0 0.5rem 1.5rem;
  overflow: auto;
  flex: 1;
}

.er-toc-item a {
  display: flex;
  gap: 0.5rem;
  padding: 0.4rem 0.55rem;
  border-radius: 6px;
  color: var(--er-ink);
  text-decoration: none;
  font-size: 0.8125rem;
  line-height: 1.35;
}

.er-toc-item a:hover {
  background: color-mix(in srgb, var(--er-accent) 8%, transparent);
}

.er-toc-item.is-active > a {
  background: color-mix(in srgb, var(--er-accent) 14%, transparent);
  color: var(--er-accent);
  font-weight: 600;
}

.er-toc-num {
  color: var(--er-ink-muted);
  min-width: 1.5rem;
  font-variant-numeric: tabular-nums;
}

.er-toc-sections {
  list-style: none;
  margin: 0 0 0.35rem;
  padding: 0 0 0 1.75rem;
}

.er-toc-sections a {
  font-size: 0.75rem;
  color: var(--er-ink-muted);
  padding: 0.2rem 0.4rem;
  display: block;
  text-decoration: none;
  border-radius: 4px;
}

.er-toc-sections a:hover,
.er-toc-sections a.is-active {
  color: var(--er-accent);
}

.er-stage {
  flex: 1;
  min-width: 0;
  overflow: auto;
  scroll-behavior: smooth;
}

.er-article {
  max-width: calc(var(--er-measure) + 8rem);
  margin: 0 auto;
  padding: 2rem 1.25rem 5rem;
}

.er-article-header {
  margin-bottom: 1.75rem;
}

.er-article-header .er-kicker {
  font-size: 0.8125rem;
  color: var(--er-ink-muted);
  margin: 0 0 0.35rem;
}

.er-article-header h1 {
  font-family: var(--er-font-serif);
  font-size: clamp(1.5rem, 2.5vw, 1.85rem);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 0.35rem;
  color: var(--er-ink);
}

.er-han {
  font-family: var(--er-font-kaiti);
  font-size: 1.45rem;
  font-weight: 500;
  color: var(--er-han-ink);
  letter-spacing: 0.08em;
  line-height: 1.6;
  margin: 0.15rem 0 0;
}

/* Original Text — trang trọng, Kaiti, mực đậm, cỡ lớn */
.er-layer[data-layer="original"] {
  font-family: var(--er-font-kaiti);
  font-size: var(--er-han-size);
  font-weight: 500;
  color: var(--er-han-ink);
  line-height: var(--er-han-leading);
  letter-spacing: 0.1em;
  max-width: min(var(--er-measure), 36rem);
}

.er-layer[data-layer="original"] .er-layer-title {
  font-family: var(--er-font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--er-ink-muted);
  margin-bottom: 1.1rem;
}

.er-layer[data-layer="original"] p {
  margin: 0 0 1.25em;
  text-align: justify;
  text-justify: inter-character;
}

.er-shell[data-mode="original"] .er-layers {
  font-size: var(--er-size);
}

.er-shell[data-mode="original"] .er-layer[data-layer="original"],
.er-shell[data-mode="parallel"] .er-layer[data-layer="original"] {
  font-size: calc(var(--er-size) * 1.42);
}

.er-shell[data-mode="study"] .er-layer[data-layer="original"] {
  font-size: calc(var(--er-size) * 1.28);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--er-border);
  margin-bottom: 2.25rem;
}

.er-layers {
  font-family: var(--er-font);
  font-size: var(--er-size);
  line-height: var(--er-leading);
  color: var(--er-ink);
}

.er-layer {
  display: none;
  margin-bottom: 2rem;
  max-width: var(--er-measure);
}

.er-shell[data-mode="original"] .er-layer[data-layer="original"],
.er-shell[data-mode="translation"] .er-layer[data-layer="literary"],
.er-shell[data-mode="commentary"] .er-layer[data-layer="literary"],
.er-shell[data-mode="commentary"] .er-layer[data-layer="commentary"],
.er-shell[data-mode="commentary"] .er-layer[data-layer="notes"],
.er-shell[data-mode="study"] .er-layer {
  display: block;
}

.er-shell[data-mode="parallel"] .er-layers {
  display: grid;
  gap: 1.5rem 2rem;
}

@media (min-width: 900px) {
  .er-shell[data-mode="parallel"] .er-layers {
    grid-template-columns: 1fr 1fr;
    max-width: min(72rem, 100%);
  }
  .er-shell[data-mode="parallel"] .er-layer {
    max-width: none;
  }
}

.er-shell[data-mode="parallel"] .er-layer[data-layer="original"],
.er-shell[data-mode="parallel"] .er-layer[data-layer="literary"] {
  display: block;
}

.er-layer-title {
  font-family: var(--er-font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--er-ink-muted);
  margin: 0 0 0.85rem;
  border: 0;
}

.er-layers p {
  margin: 0 0 1.05em;
}

.er-layers h2:not(.er-layer-title) {
  font-size: 1.1em;
  margin: 1.4em 0 0.6em;
}

.er-layers h3 {
  font-size: 1em;
  margin: 1.2em 0 0.5em;
}

.er-layers em {
  color: var(--er-ink-muted);
}

.er-layers ::selection {
  background: var(--er-highlight);
}

.er-layers mark.er-hl {
  background: color-mix(in srgb, var(--er-highlight) 70%, transparent);
  color: inherit;
  border-radius: 2px;
  padding: 0 0.05em;
}

/* CJK tap target hint */
.er-layers[data-dict="on"] {
  cursor: text;
}

.er-bottom {
  position: sticky;
  bottom: 0;
  z-index: 40;
  height: var(--er-bottom-h);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 0.85rem;
  background: color-mix(in srgb, var(--er-surface) 94%, transparent);
  backdrop-filter: blur(8px);
  border-top: 1px solid var(--er-border);
}

.er-bottom a {
  color: var(--er-ink-muted);
  text-decoration: none;
  font-size: 0.8125rem;
  white-space: nowrap;
}

.er-bottom a:hover { color: var(--er-accent); }

.er-progress-wrap {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.er-progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--er-ink-muted);
}

.er-progress-track {
  height: 3px;
  background: var(--er-border);
  border-radius: 99px;
  overflow: hidden;
}

.er-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--er-progress);
  border-radius: 99px;
  transition: width 0.15s linear;
}

.er-mobile-nav {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 45;
  height: 3.25rem;
  background: var(--er-surface);
  border-top: 1px solid var(--er-border);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.er-mobile-nav button {
  flex: 1;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--er-ink-muted);
  font-size: 0.65rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  cursor: pointer;
}

.er-mobile-nav button i { font-size: 1rem; }
.er-mobile-nav button[aria-pressed="true"],
.er-mobile-nav button:hover { color: var(--er-accent); }

@media (max-width: 1023px) {
  .er-shell[data-toc="open"] .er-toc {
    position: fixed;
    inset: var(--er-top-h) 30% 0 0;
    max-height: none;
    z-index: 50;
    box-shadow: none;
    border-right: 1px solid var(--er-border);
  }
  .er-toc-backdrop {
    display: none;
    position: fixed;
    inset: var(--er-top-h) 0 0 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 45;
  }
  .er-shell[data-toc="open"] .er-toc-backdrop { display: block; }
  .er-mobile-nav { display: flex; }
  .er-bottom { bottom: 3.25rem; }
  body.page-ebook-reader { padding-bottom: 3.25rem; }
  .er-mode-switch { display: none !important; }
}

/* Focus mode */
.er-shell[data-focus="on"] .er-topbar,
.er-shell[data-focus="on"] .er-toc,
.er-shell[data-focus="on"] .er-bottom,
.er-shell[data-focus="on"] .er-mobile-nav,
.er-shell[data-focus="on"] .er-toc-backdrop {
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.er-shell[data-focus="on"] .er-bottom,
.er-shell[data-focus="on"] .er-mobile-nav {
  transform: translateY(4px);
}

@media (prefers-reduced-motion: reduce) {
  .er-shell[data-focus="on"] .er-topbar,
  .er-shell[data-focus="on"] .er-toc,
  .er-shell[data-focus="on"] .er-bottom,
  .er-shell[data-focus="on"] .er-mobile-nav {
    transition: none;
  }
  .er-stage { scroll-behavior: auto; }
}

/* Prefs / mode sheets */
.er-sheet {
  position: fixed;
  z-index: 60;
  background: var(--er-surface);
  color: var(--er-ink);
  border: 1px solid var(--er-border);
  padding: 1rem 1.1rem 1.25rem;
  display: none;
}

.er-sheet.is-open { display: block; }

.er-sheet-prefs,
.er-sheet-modes {
  right: 0.75rem;
  top: calc(var(--er-top-h) + 0.5rem);
  width: min(20rem, calc(100vw - 1.5rem));
  border-radius: 10px;
}

@media (max-width: 640px) {
  .er-sheet-prefs,
  .er-sheet-modes,
  .er-sheet-dict {
    left: 0;
    right: 0;
    top: auto;
    bottom: 0;
    width: auto;
    border-radius: 14px 14px 0 0;
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
    max-height: 70vh;
    overflow: auto;
  }
}

.er-sheet h3 {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
}

.er-pref-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 0.8125rem;
}

.er-pref-row label { color: var(--er-ink-muted); }

.er-pref-row select,
.er-pref-row input[type="range"] {
  accent-color: var(--er-accent);
}

.er-pref-themes {
  display: flex;
  gap: 0.35rem;
}

.er-pref-themes button {
  flex: 1;
  appearance: none;
  border: 1px solid var(--er-border);
  background: var(--er-bg);
  color: var(--er-ink);
  border-radius: 6px;
  padding: 0.4rem;
  font-size: 0.75rem;
  cursor: pointer;
  text-transform: capitalize;
}

.er-pref-themes button[aria-pressed="true"] {
  border-color: var(--er-accent);
  color: var(--er-accent);
  font-weight: 600;
}

.er-sheet-dict {
  top: var(--er-top-h);
  right: 0;
  bottom: var(--er-bottom-h);
  width: min(20rem, 100%);
  border-radius: 0;
  border-top: 0;
  border-bottom: 0;
  overflow: auto;
}

.er-dict-char {
  font-family: var(--er-font-serif);
  font-size: 2.5rem;
  line-height: 1.2;
  margin: 0 0 0.5rem;
}

.er-dict-meta {
  font-size: 0.8125rem;
  color: var(--er-ink-muted);
  line-height: 1.5;
}

.er-sel-toolbar {
  position: absolute;
  z-index: 55;
  display: none;
  gap: 0.25rem;
  padding: 0.25rem;
  background: var(--er-surface);
  border: 1px solid var(--er-border);
  border-radius: 8px;
}

.er-sel-toolbar.is-open { display: flex; }

.er-sel-toolbar button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--er-ink);
  font-size: 0.75rem;
  padding: 0.35rem 0.5rem;
  border-radius: 5px;
  cursor: pointer;
}

.er-sel-toolbar button:hover {
  background: color-mix(in srgb, var(--er-accent) 12%, transparent);
  color: var(--er-accent);
}

.er-font-serif .er-layers { font-family: var(--er-font-serif); }
.er-font-sans .er-layers { font-family: var(--er-font-sans); }

/* Home book notices banner styles live in main.css (.home-book-banner) */

/* Home — classical library (physical book volume) */
.home-books {
  max-width: 1120px;
  margin: 0 auto 2.5rem;
  padding: 0 1.25rem 0.5rem;
}

.home-books-desc {
  color: var(--er-ink-muted, #5c574e);
  font-size: 0.95rem;
  margin: 0 0 1.35rem;
  max-width: 40rem;
  line-height: 1.55;
}

.home-books-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem 2rem;
  align-items: flex-end;
  padding: 0.5rem 0.25rem 1rem;
}

.home-books-grid--featured {
  padding-bottom: 0.25rem;
}

/* Album-style frosted “+N” overflow tile */
.home-book-more {
  position: relative;
  display: block;
  width: 11.5rem;
  height: 16.5rem;
  text-decoration: none;
  color: inherit;
  border-radius: 4px 6px 6px 3px;
  isolation: isolate;
}

.home-book-more-stack {
  position: absolute;
  inset: 0.55rem 0.45rem 0.55rem 0.65rem;
  z-index: 0;
}

.home-book-more-peek {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "LXGW WenKai", "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: 1.65rem;
  letter-spacing: 0.08em;
  color: #f3efe6;
  border-radius: 3px;
  box-shadow: 0 6px 16px rgba(20, 16, 12, 0.18);
}

.home-book-more-peek[data-i="0"] {
  background: linear-gradient(155deg, #3a2a24, #241814);
  transform: rotate(-6deg) translate(-4px, 2px);
}

.home-book-more-peek[data-i="1"] {
  background: linear-gradient(155deg, #2c3040, #1a1d28);
  transform: rotate(4deg) translate(5px, -1px);
}

.home-book-more-peek[data-i="2"] {
  background: linear-gradient(155deg, #2a3d38, #1a2824);
  transform: rotate(-1deg);
}

.home-book-more-glass {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border-radius: 4px 6px 6px 3px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0.12) 45%, rgba(240, 236, 228, 0.28)),
    color-mix(in srgb, #f7f4ee 55%, transparent);
  backdrop-filter: blur(14px) saturate(1.35);
  -webkit-backdrop-filter: blur(14px) saturate(1.35);
  border: 1px solid rgba(255, 255, 255, 0.55);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.55),
    0 10px 28px rgba(30, 24, 18, 0.12);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.home-book-more:hover .home-book-more-glass,
.home-book-more:focus-visible .home-book-more-glass {
  transform: translateY(-5px);
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.52), rgba(255, 255, 255, 0.16) 45%, rgba(240, 236, 228, 0.34)),
    color-mix(in srgb, #f7f4ee 48%, transparent);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.65),
    0 16px 34px rgba(30, 24, 18, 0.16);
}

.home-book-more-plus {
  font-family: var(--er-font-serif, "Source Serif 4", Georgia, serif);
  font-size: 2.15rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #1c1812;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.home-book-more-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: color-mix(in srgb, #1c1812 72%, transparent);
}

html[data-theme="dark"] .home-book-more-glass,
[data-er-theme="dark"] .home-book-more-glass {
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.04) 50%, rgba(20, 18, 16, 0.35)),
    color-mix(in srgb, #1a1814 55%, transparent);
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    0 10px 28px rgba(0, 0, 0, 0.35);
}

html[data-theme="dark"] .home-book-more-plus,
[data-er-theme="dark"] .home-book-more-plus {
  color: #f5f2eb;
}

html[data-theme="dark"] .home-book-more-label,
[data-er-theme="dark"] .home-book-more-label {
  color: color-mix(in srgb, #f5f2eb 70%, transparent);
}

.home-books-subhead {
  margin: 1.75rem 0 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--er-ink-muted, #5c574e);
}

.home-books-groups {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0 0 0.5rem;
}

.home-books-group {
  display: grid;
  grid-template-columns: 7.5rem minmax(0, 1fr) auto;
  gap: 0.75rem 1rem;
  align-items: baseline;
  padding: 0.7rem 0.15rem;
  border-bottom: 1px solid color-mix(in srgb, var(--er-border, #e5e1d8) 85%, transparent);
  text-decoration: none;
  color: inherit;
}

.home-books-group:last-child {
  border-bottom: 0;
}

.home-books-group:hover .home-books-group-label,
.home-books-group:focus-visible .home-books-group-label {
  color: var(--er-accent, #2a3d38);
}

.home-books-group-label {
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

.home-books-group-preview {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.875rem;
  color: var(--er-ink-muted, #5c574e);
}

.home-books-group-count {
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  color: var(--er-ink-muted, #5c574e);
  white-space: nowrap;
}

@media (max-width: 640px) {
  .home-books-group {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "label count"
      "preview preview";
    gap: 0.2rem 0.75rem;
    padding: 0.85rem 0.1rem;
  }
  .home-books-group-label { grid-area: label; }
  .home-books-group-count { grid-area: count; }
  .home-books-group-preview { grid-area: preview; white-space: normal; }
}

.books-cat-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.55rem;
  margin: 0 0 1.75rem;
}

.books-cat-nav-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, #2a3d38 14%, #e5e7eb);
  background: color-mix(in srgb, #2a3d38 4%, #f8f7f4);
  color: inherit;
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
}

.books-cat-nav-item span {
  color: var(--er-ink-muted, #5c574e);
  font-variant-numeric: tabular-nums;
}

.books-cat-nav-item:hover,
.books-cat-nav-item:focus-visible {
  border-color: color-mix(in srgb, #2a3d38 35%, #e5e7eb);
  background: color-mix(in srgb, #2a3d38 8%, #f8f7f4);
}

.books-cat-section {
  margin: 0 0 2.25rem;
  scroll-margin-top: 5rem;
}

.books-cat-title {
  margin: 0 0 1rem;
  font-size: 1.15rem;
  font-weight: 600;
}

.home-book-card {
  display: block;
  width: 11.5rem;
  text-decoration: none;
  color: inherit;
  perspective: 800px;
}

.home-book-volume {
  --book-cloth: #2a3d38;
  --book-cloth-deep: #1a2824;
  --book-gold: #c4a574;
  --book-ink: #f3efe6;
  position: relative;
  display: block;
  height: 16.5rem;
  transform-style: preserve-3d;
  transition: transform 0.35s ease;
}

.home-book-card:nth-child(3n + 2) .home-book-volume {
  --book-cloth: #3a2a24;
  --book-cloth-deep: #241814;
}

.home-book-card:nth-child(3n) .home-book-volume {
  --book-cloth: #2c3040;
  --book-cloth-deep: #1a1d28;
}

.home-book-card:hover .home-book-volume,
.home-book-card:focus-visible .home-book-volume {
  transform: translateY(-6px) rotateY(-4deg);
}

.home-book-spine {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0.85rem;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.35), transparent 40%),
    linear-gradient(180deg, var(--book-cloth-deep), var(--book-cloth) 18%, var(--book-cloth) 82%, var(--book-cloth-deep));
  border-radius: 3px 0 0 3px;
  z-index: 2;
}

.home-book-spine::after {
  content: "";
  position: absolute;
  inset: 12% 35% 12% 40%;
  border-left: 1px solid color-mix(in srgb, var(--book-gold) 35%, transparent);
  border-right: 1px solid color-mix(in srgb, var(--book-gold) 20%, transparent);
}

.home-book-cover {
  position: absolute;
  inset: 0 0.35rem 0 0.75rem;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 1.35rem 0.85rem 1.1rem;
  text-align: center;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(255, 255, 255, 0.06), transparent 45%),
    linear-gradient(165deg, color-mix(in srgb, var(--book-cloth) 88%, #fff) 0%, var(--book-cloth) 42%, var(--book-cloth-deep) 100%);
  border: 1px solid color-mix(in srgb, var(--book-gold) 28%, transparent);
  border-left: 0;
  border-radius: 0 4px 4px 0;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    inset 0 0 40px rgba(0, 0, 0, 0.18);
}

.home-book-ornament {
  width: 1.6rem;
  height: 1.6rem;
  margin-bottom: 0.15rem;
  border: 1px solid color-mix(in srgb, var(--book-gold) 55%, transparent);
  transform: rotate(45deg);
  opacity: 0.85;
}

.home-book-ornament::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid color-mix(in srgb, var(--book-gold) 40%, transparent);
}

.home-book-han {
  font-family: "LXGW WenKai", "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: 1.85rem;
  font-weight: 500;
  color: var(--book-ink);
  letter-spacing: 0.22em;
  line-height: 1.35;
  writing-mode: horizontal-tb;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.25);
}

.home-book-title {
  font-family: "Source Serif 4", Georgia, "Noto Serif", serif;
  font-size: 0.92rem;
  font-weight: 600;
  color: color-mix(in srgb, var(--book-ink) 92%, var(--book-gold));
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.home-book-author {
  font-size: 0.72rem;
  color: color-mix(in srgb, var(--book-gold) 75%, var(--book-ink));
  letter-spacing: 0.08em;
  text-transform: none;
}

.home-book-rule {
  display: block;
  width: 2.4rem;
  height: 1px;
  margin: 0.15rem 0 0.05rem;
  background: linear-gradient(90deg, transparent, var(--book-gold), transparent);
  opacity: 0.7;
}

.home-book-meta {
  font-size: 0.68rem;
  color: color-mix(in srgb, var(--book-ink) 70%, transparent);
  letter-spacing: 0.06em;
}

.home-book-cta {
  margin-top: 0.35rem;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--book-gold);
  opacity: 0.9;
}

.home-book-pages {
  position: absolute;
  right: 0;
  top: 0.35rem;
  bottom: 0.35rem;
  width: 0.45rem;
  z-index: 0;
  background:
    repeating-linear-gradient(
      180deg,
      #f7f3ea 0px,
      #f7f3ea 2px,
      #e8e0d0 2px,
      #e8e0d0 3px
    );
  border-radius: 0 2px 2px 0;
  box-shadow: inset -1px 0 0 rgba(0, 0, 0, 0.08);
}

.page-books .books-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.75rem 2rem;
}

.page-books .books-list-item {
  margin: 0;
  padding: 0;
}

.book-han {
  font-family: "LXGW WenKai", "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: 1.75rem;
  font-weight: 500;
  color: #0a0908;
  letter-spacing: 0.1em;
  margin: 0 0 0.35rem;
}

.book-actions {
  margin: 1rem 0 0;
}

/* Book hub polish — Google eBook / Play Books style */
.page-book .ebook-hub,
.page-books .books-index-page {
  max-width: 56rem;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3.5rem;
}

.page-book .book-breadcrumb {
  margin: 0 0 1.75rem;
}

.page-book .book-breadcrumb-list {
  list-style: none;
  margin: 0;
  padding: 0.35rem 0.45rem;
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem;
  max-width: 100%;
  border-radius: 999px;
  background: color-mix(in srgb, #2a3d38 6%, #f3f4f6);
  border: 1px solid color-mix(in srgb, #2a3d38 10%, #e5e7eb);
}

.page-book .book-breadcrumb-list > li {
  display: inline-flex;
  align-items: center;
  min-width: 0;
}

.page-book .book-breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 550;
  color: #3f4a45;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.page-book .book-breadcrumb a i {
  font-size: 0.72rem;
  color: #6b7c74;
}

.page-book .book-breadcrumb a:hover {
  background: #fff;
  color: #1a3a32;
  box-shadow: 0 1px 2px rgba(26, 58, 50, 0.08);
}

.page-book .book-breadcrumb a:hover i {
  color: #1a3a32;
}

.page-book .book-breadcrumb-sep {
  color: #b0b8b3;
  font-size: 0.55rem;
  padding: 0 0.1rem;
  line-height: 1;
}

.page-book .book-breadcrumb-current {
  display: inline-block;
  max-width: 14rem;
  padding: 0.4rem 0.85rem 0.4rem 0.55rem;
  font-size: 0.8rem;
  font-weight: 650;
  color: #1a3a32;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ebook-hero {
  display: grid;
  grid-template-columns: minmax(11rem, 14rem) minmax(0, 1fr);
  gap: 2rem 2.5rem;
  align-items: start;
  margin-bottom: 2.75rem;
}

.ebook-cover-wrap {
  perspective: 900px;
}

.ebook-cover {
  --book-cloth: #2a3d38;
  --book-cloth-deep: #1a2824;
  --book-gold: #c4a574;
  --book-ink: #f3efe6;
  position: relative;
  width: 100%;
  aspect-ratio: 2 / 3;
  transform-style: preserve-3d;
  filter: drop-shadow(0 18px 28px rgba(20, 24, 20, 0.28));
  transition: transform 0.35s ease;
}

.ebook-cover:hover {
  transform: translateY(-4px) rotateY(-5deg);
}

.ebook-cover-spine {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0.9rem;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.4), transparent 45%),
    linear-gradient(180deg, var(--book-cloth-deep), var(--book-cloth) 18%, var(--book-cloth) 82%, var(--book-cloth-deep));
  border-radius: 3px 0 0 3px;
  z-index: 2;
}

.ebook-cover-face {
  position: absolute;
  inset: 0 0.4rem 0 0.8rem;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 1.1rem 0.85rem 1rem;
  text-align: center;
  background:
    radial-gradient(ellipse at 28% 18%, rgba(255, 255, 255, 0.07), transparent 48%),
    linear-gradient(165deg, color-mix(in srgb, var(--book-cloth) 88%, #fff) 0%, var(--book-cloth) 42%, var(--book-cloth-deep) 100%);
  border: 1px solid color-mix(in srgb, var(--book-gold) 30%, transparent);
  border-left: 0;
  border-radius: 0 5px 5px 0;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    inset 0 0 48px rgba(0, 0, 0, 0.2);
}

.ebook-cover-logo {
  width: 2.25rem;
  height: 2.25rem;
  object-fit: contain;
  margin-top: 0.15rem;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
}

.ebook-cover-brand {
  margin-top: 0.35rem;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--book-gold) 85%, var(--book-ink));
}

.ebook-cover-ornament {
  display: block;
  width: 2.6rem;
  height: 1px;
  margin: 0.85rem 0 1rem;
  background: linear-gradient(90deg, transparent, var(--book-gold), transparent);
  opacity: 0.75;
}

.ebook-cover-han {
  font-family: "LXGW WenKai", "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: clamp(1.65rem, 4vw, 2.15rem);
  font-weight: 700;
  color: var(--book-ink);
  letter-spacing: 0.2em;
  line-height: 1.3;
  margin: 0 0 0.45rem;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.28);
}

.ebook-cover-title {
  font-family: "Source Serif 4", Georgia, "Noto Serif", serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: color-mix(in srgb, var(--book-ink) 92%, var(--book-gold));
  margin: 0 0 0.35rem;
  line-height: 1.3;
}

.ebook-cover-author {
  font-size: 0.72rem;
  color: color-mix(in srgb, var(--book-gold) 80%, var(--book-ink));
  letter-spacing: 0.06em;
  margin: 0;
}

.ebook-cover-footer {
  margin-top: auto;
  padding-top: 1rem;
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--book-ink) 55%, transparent);
}

.ebook-cover-pages {
  position: absolute;
  right: 0;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 0.48rem;
  z-index: 0;
  background:
    repeating-linear-gradient(
      180deg,
      #f7f3ea 0px,
      #f7f3ea 2px,
      #e8e0d0 2px,
      #e8e0d0 3px
    );
  border-radius: 0 2px 2px 0;
  box-shadow: inset -1px 0 0 rgba(0, 0, 0, 0.08);
}

.ebook-meta {
  min-width: 0;
  padding-top: 0.25rem;
}

.ebook-han-display {
  font-family: "LXGW WenKai", "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: clamp(1.85rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.18em;
  line-height: 1.25;
  color: #1a1f1c;
  margin: 0 0 0.35rem;
}

.ebook-meta h1 {
  font-family: "Source Serif 4", Georgia, "Noto Serif", serif;
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
  color: #111827;
  line-height: 1.2;
}

.ebook-byline {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  color: #4b5563;
}

.ebook-description {
  margin: 0 0 1.35rem;
  font-size: 0.98rem;
  line-height: 1.65;
  color: #374151;
  max-width: 36rem;
}

.ebook-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.25rem;
}

.ebook-btn-read {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.8rem 1.45rem;
  border-radius: 999px;
  background: #1a3a32;
  color: #f7f3ea !important;
  font-weight: 650;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  text-decoration: none !important;
  box-shadow: 0 8px 20px rgba(26, 58, 50, 0.28);
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.ebook-btn-read:hover {
  background: #244a40;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(26, 58, 50, 0.34);
}

.ebook-btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.1rem;
  border-radius: 999px;
  border: 1px solid #d1d5db;
  color: #374151 !important;
  font-weight: 550;
  font-size: 0.92rem;
  text-decoration: none !important;
  background: #fff;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.ebook-btn-ghost:hover {
  border-color: #9ca3af;
  background: #f9fafb;
}

.ebook-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.ebook-facts li {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 4.5rem;
  padding: 0.55rem 0.75rem;
  border-radius: 0.55rem;
  background: #f3f4f6;
  border: 1px solid #e5e7eb;
}

.ebook-facts span {
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #6b7280;
}

.ebook-facts strong {
  font-size: 0.85rem;
  font-weight: 650;
  color: #1f2937;
}

.ebook-chapters-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid #e5e7eb;
}

.ebook-chapters-head h2 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  color: #111827;
}

.ebook-chapters-head span {
  font-size: 0.85rem;
  color: #6b7280;
}

.ebook-ch-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16.5rem, 1fr));
  gap: 0.35rem 1rem;
}

.ebook-ch-item a {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr) auto;
  gap: 0.55rem;
  align-items: start;
  padding: 0.7rem 0.55rem;
  border-radius: 0.55rem;
  text-decoration: none;
  color: inherit;
  transition: background 0.15s ease;
}

.ebook-ch-item a:hover {
  background: #f3f4f6;
}

.ebook-ch-num {
  font-variant-numeric: tabular-nums;
  font-size: 0.82rem;
  font-weight: 600;
  color: #6b7280;
  padding-top: 0.12rem;
}

.ebook-ch-body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.ebook-ch-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: #111827;
  line-height: 1.35;
}

.ebook-ch-han {
  font-family: "LXGW WenKai", "Kaiti SC", "STKaiti", "KaiTi", serif;
  font-size: 0.82rem;
  color: #6b7280;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ebook-ch-go {
  color: #9ca3af;
  font-size: 0.95rem;
  padding-top: 0.1rem;
  opacity: 0;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.ebook-ch-item a:hover .ebook-ch-go {
  opacity: 1;
  transform: translateX(2px);
  color: #1a3a32;
}

@media (max-width: 720px) {
  .ebook-hero {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    gap: 1.5rem;
  }

  .ebook-cover-wrap {
    width: min(12.5rem, 55vw);
  }

  .ebook-meta {
    width: 100%;
  }

  .ebook-description {
    margin-left: auto;
    margin-right: auto;
  }

  .ebook-actions {
    justify-content: center;
  }

  .ebook-facts {
    justify-content: center;
  }

  .ebook-ch-list {
    grid-template-columns: 1fr;
  }
}

[data-theme="dark"] .ebook-han-display,
[data-theme="dark"] .ebook-meta h1,
[data-theme="dark"] .ebook-ch-title,
[data-theme="dark"] .ebook-chapters-head h2 {
  color: #f3f4f6;
}

[data-theme="dark"] .ebook-byline,
[data-theme="dark"] .ebook-ch-han,
[data-theme="dark"] .ebook-chapters-head span {
  color: #9ca3af;
}

[data-theme="dark"] .ebook-description {
  color: #d1d5db;
}

[data-theme="dark"] .ebook-btn-ghost {
  background: transparent;
  border-color: #4b5563;
  color: #e5e7eb !important;
}

[data-theme="dark"] .ebook-btn-ghost:hover {
  background: #1f2937;
  border-color: #6b7280;
}

[data-theme="dark"] .ebook-facts li {
  background: #1f2937;
  border-color: #374151;
}

[data-theme="dark"] .ebook-facts span {
  color: #9ca3af;
}

[data-theme="dark"] .ebook-facts strong {
  color: #f3f4f6;
}

[data-theme="dark"] .ebook-chapters-head {
  border-bottom-color: #374151;
}

[data-theme="dark"] .ebook-ch-item a:hover {
  background: #1f2937;
}

[data-theme="dark"] .page-book .book-breadcrumb-list {
  background: color-mix(in srgb, #2a3d38 35%, #111827);
  border-color: #374151;
}

[data-theme="dark"] .page-book .book-breadcrumb a {
  color: #d1d5db;
}

[data-theme="dark"] .page-book .book-breadcrumb a i {
  color: #9ca3af;
}

[data-theme="dark"] .page-book .book-breadcrumb a:hover {
  background: #1f2937;
  color: #f3f4f6;
  box-shadow: none;
}

[data-theme="dark"] .page-book .book-breadcrumb a:hover i {
  color: #f3f4f6;
}

[data-theme="dark"] .page-book .book-breadcrumb-sep {
  color: #6b7280;
}

[data-theme="dark"] .page-book .book-breadcrumb-current {
  color: #e8f0ec;
}