:root {
  --qr-bg: #f2eee5;
  --qr-bg-strong: #e7dccb;
  --qr-paper: #fffdf6;
  --qr-paper-soft: #fbf5e7;
  --qr-ink: #211d17;
  --qr-text: #332c23;
  --qr-muted: #756d60;
  --qr-line: rgba(91, 76, 50, 0.22);
  --qr-cinnabar: #b83424;
  --qr-jade: #1f6653;
  --qr-indigo: #233a6d;
  --qr-shadow: 0 18px 38px rgba(54, 40, 20, 0.11);
  --qr-reader-width: 840px;
  --qr-reader-font-size: 21px;
  --qr-reader-line-height: 1.95;
  color-scheme: light;
}

html[data-reader-font="small"] { --qr-reader-font-size: 18px; }
html[data-reader-font="medium"] { --qr-reader-font-size: 21px; }
html[data-reader-font="large"] { --qr-reader-font-size: 24px; }
html[data-reader-spacing="compact"] { --qr-reader-line-height: 1.7; }
html[data-reader-spacing="relaxed"] { --qr-reader-line-height: 1.95; }
html[data-reader-spacing="airy"] { --qr-reader-line-height: 2.18; }
html[data-reader-width="narrow"] { --qr-reader-width: 720px; }
html[data-reader-width="standard"] { --qr-reader-width: 840px; }
html[data-reader-width="wide"] { --qr-reader-width: 1020px; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--qr-ink);
  background:
    linear-gradient(90deg, rgba(31, 102, 83, 0.055) 1px, transparent 1px),
    linear-gradient(rgba(31, 102, 83, 0.045) 1px, transparent 1px),
    radial-gradient(circle at 12% 12%, rgba(184, 52, 36, 0.13), transparent 26%),
    radial-gradient(circle at 88% 10%, rgba(35, 58, 109, 0.10), transparent 25%),
    linear-gradient(135deg, #fffaf0 0%, var(--qr-bg) 54%, var(--qr-bg-strong) 100%);
  background-size: 42px 42px, 42px 42px, auto, auto, auto;
  font-family: "Segoe UI", "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
}

html[data-reader-theme="white"] body.reader-page {
  --qr-bg: #edf1ef;
  --qr-bg-strong: #dfe6e2;
  --qr-paper: #ffffff;
  --qr-paper-soft: #f5f8f6;
  --qr-ink: #171b19;
  --qr-text: #242a27;
  --qr-muted: #68716d;
  --qr-line: rgba(54, 69, 62, 0.19);
  background:
    linear-gradient(90deg, rgba(31, 102, 83, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(31, 102, 83, 0.035) 1px, transparent 1px),
    linear-gradient(135deg, #f8faf9, #e6ece9);
  background-size: 42px 42px, 42px 42px, auto;
}

html[data-reader-theme="night"] body.reader-page {
  --qr-bg: #101619;
  --qr-bg-strong: #080d0f;
  --qr-paper: #1a2225;
  --qr-paper-soft: #202b2e;
  --qr-ink: #efe8da;
  --qr-text: #d8d2c5;
  --qr-muted: #9e9b92;
  --qr-line: rgba(223, 214, 196, 0.16);
  --qr-shadow: 0 22px 48px rgba(0, 0, 0, 0.32);
  color-scheme: dark;
  background:
    linear-gradient(90deg, rgba(129, 164, 151, 0.045) 1px, transparent 1px),
    linear-gradient(rgba(129, 164, 151, 0.04) 1px, transparent 1px),
    radial-gradient(circle at 20% 8%, rgba(184, 84, 57, 0.10), transparent 30%),
    linear-gradient(145deg, #172023, #0a0f11 72%);
  background-size: 42px 42px, 42px 42px, auto, auto;
}

a { color: inherit; }

::selection {
  color: var(--qr-paper);
  background: var(--qr-cinnabar);
}

:focus-visible {
  outline: 3px solid rgba(184, 52, 36, 0.34);
  outline-offset: 3px;
}

.site-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}

.reader-shell {
  max-width: var(--qr-reader-width);
  margin: 0 auto;
  padding: 94px 20px 56px;
  transition: max-width 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.topbar,
.reader-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.topbar { margin-bottom: 34px; }

.reader-bar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  min-height: 64px;
  padding: 0 max(18px, calc((100vw - var(--qr-reader-width)) / 2));
  color: var(--qr-paper);
  background: rgba(33, 29, 23, 0.94);
  box-shadow: 0 10px 28px rgba(33, 29, 23, 0.18);
  backdrop-filter: blur(12px);
  transition: min-height 0.28s cubic-bezier(0.22, 1, 0.36, 1), background 0.28s ease, box-shadow 0.28s ease;
}

.reader-bar.is-compact {
  min-height: 52px;
  background: rgba(33, 29, 23, 0.975);
  box-shadow: 0 8px 22px rgba(18, 14, 10, 0.22);
}

.reader-heading {
  min-width: 0;
  max-width: min(45vw, 560px);
}

.reader-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: font-size 0.25s ease;
}

.reader-bar.is-compact .reader-title { font-size: 16px; }

.reader-bar.is-compact .reader-subtitle {
  display: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 8px;
  color: #fffdf6;
  background: linear-gradient(135deg, var(--qr-jade), #16473c);
  box-shadow: 0 12px 24px rgba(31, 102, 83, 0.22);
  font-family: "Noto Serif TC", "Noto Serif SC", "PMingLiU", serif;
  font-size: 23px;
  font-weight: 800;
}

.brand strong,
.reader-title {
  display: block;
  font-size: 18px;
  line-height: 1.1;
  font-weight: 850;
}

.brand span,
.reader-subtitle {
  display: block;
  margin-top: 4px;
  color: var(--qr-muted);
  font-size: 13px;
  font-weight: 650;
}

.reader-subtitle { color: rgba(255, 253, 246, 0.62); }

.actions,
.controls,
.stats,
.book-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.button,
.continue-link,
.reader-nav a,
.reader-nav button,
.reader-nav span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 15px;
  border: 1px solid var(--qr-line);
  border-radius: 999px;
  color: var(--qr-ink);
  background: rgba(255, 253, 246, 0.72);
  text-decoration: none;
  font: 800 14px/1 "Segoe UI", "Microsoft JhengHei", sans-serif;
  white-space: nowrap;
  transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease, color 0.16s ease;
}

.button:hover,
.continue-link:hover,
.reader-nav a:hover,
.reader-nav button:hover {
  transform: translateY(-1px);
  border-color: rgba(184, 52, 36, 0.44);
}

.button.primary,
.continue-link,
.reader-nav a,
.reader-nav button {
  color: #fffdf6;
  border-color: var(--qr-ink);
  background: var(--qr-ink);
}

.reader-bar .button {
  color: var(--qr-paper);
  border-color: rgba(255, 253, 246, 0.18);
  background: rgba(255, 253, 246, 0.08);
}

.reader-bar .button.primary {
  color: var(--qr-ink);
  border-color: var(--qr-paper);
  background: var(--qr-paper);
}

.hero {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(0, 1.35fr);
  gap: 22px;
  align-items: stretch;
  margin-bottom: 34px;
}

.panel,
.hero-card,
.stats-card,
.reading-record,
.article {
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  background: rgba(255, 253, 246, 0.88);
  box-shadow: var(--qr-shadow);
  backdrop-filter: blur(10px);
}

.hero-card {
  display: flex;
  flex-direction: column;
  padding: 34px;
}

.hero-illustration {
  position: relative;
  min-height: 320px;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  background: var(--qr-paper-soft);
  box-shadow: var(--qr-shadow);
}

.hero-illustration::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 253, 246, 0.20), transparent 34%),
    linear-gradient(180deg, transparent 62%, rgba(33, 29, 23, 0.18));
  pointer-events: none;
  z-index: 2;
}

.hero-illustration::before {
  content: "";
  position: absolute;
  z-index: 1;
  inset: -18% -12% 18% 46%;
  background: radial-gradient(circle, rgba(255, 190, 91, 0.18), transparent 58%);
  opacity: 0.7;
  pointer-events: none;
}

.hero-illustration img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform-origin: 68% 48%;
}

.eyebrow {
  color: var(--qr-cinnabar);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

h1,
.display-title,
.book-title,
.section-title h2,
.article h1 {
  font-family: "Noto Serif TC", "Noto Serif SC", "Songti SC", "PMingLiU", serif;
  letter-spacing: 0;
}

.display-title,
h1 {
  margin: 18px 0 14px;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.08;
  font-weight: 760;
}

.sub {
  max-width: 680px;
  margin: 0;
  color: var(--qr-muted);
  font-size: 17px;
  line-height: 1.78;
}

.stats-card {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: auto;
  padding-top: 28px;
}

.stat {
  min-width: 0;
  padding: 18px 18px 20px;
  border: 1px solid rgba(91, 76, 50, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.42);
}

.stat span,
.pill,
.label,
.meta {
  color: var(--qr-muted);
  font-size: 13px;
  font-weight: 750;
}

.stat strong {
  display: block;
  margin-top: 8px;
  color: var(--qr-jade);
  font-size: clamp(31px, 4vw, 48px);
  line-height: 1;
  font-weight: 900;
  word-break: keep-all;
  font-variant-numeric: tabular-nums;
}

.stat:first-child strong { color: var(--qr-cinnabar); }

.section-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin: 0 0 16px;
}

.section-title h2 {
  margin: 0;
  font-size: 26px;
}

.section-title span {
  color: var(--qr-muted);
  font-size: 14px;
  font-weight: 650;
}

.books {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 18px;
}

.book {
  position: relative;
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 16px;
  min-height: 178px;
  overflow: hidden;
  padding: 18px 20px 18px 28px;
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  color: var(--qr-ink);
  background: linear-gradient(135deg, rgba(255, 253, 246, 0.86), rgba(251, 245, 231, 0.96));
  box-shadow: 0 12px 26px rgba(54, 40, 20, 0.08);
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.book::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: var(--qr-cinnabar);
  transition: width 0.24s cubic-bezier(0.22, 1, 0.36, 1);
}

.book:nth-child(3n + 2)::before { background: var(--qr-jade); }
.book:nth-child(3n)::before { background: var(--qr-indigo); }
.book[href]:hover {
  transform: translateY(-4px);
  border-color: rgba(184, 52, 36, 0.42);
  box-shadow: 0 20px 42px rgba(54, 40, 20, 0.15);
}

.book[href]:hover::before { width: 10px; }

.book:not([href]) { opacity: 0.62; }

.book-cover {
  position: relative;
  align-self: start;
  flex: 0 0 82px;
  width: 82px;
  min-width: 82px;
  max-width: 82px;
  height: 123px;
  min-height: 123px;
  max-height: 123px;
  overflow: hidden;
  border: 1px solid rgba(91, 76, 50, 0.18);
  border-radius: 6px;
  background: var(--qr-paper-soft);
  box-shadow: 0 10px 20px rgba(54, 40, 20, 0.10);
  transform-origin: 45% 80%;
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.28s ease;
}

.book[href]:hover .book-cover {
  transform: translateY(-3px) rotate(-1.5deg) scale(1.018);
  box-shadow: 8px 15px 24px rgba(54, 40, 20, 0.16);
}

.book.has-progress .book-cover::after {
  content: "";
  position: absolute;
  top: -1px;
  right: auto;
  left: 9px;
  width: 13px;
  height: 31px;
  background: linear-gradient(180deg, #cf4938, var(--qr-cinnabar));
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 76%, 0 100%);
  filter: drop-shadow(0 3px 3px rgba(54, 40, 20, 0.18));
  transform: translateY(-8px);
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 6;
}

.book.has-progress:hover .book-cover::after { transform: translateY(0); }
.book.has-progress .generated-cover-kicker { opacity: 0; }

.book-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.generated-cover {
  --cover-deep: #183e37;
  --cover-mid: #5f897d;
  --cover-pale: #e5dfcb;
  position: relative;
  isolation: isolate;
  color: #1d2925;
  background:
    radial-gradient(circle at 78% 17%, rgba(255, 251, 231, 0.88) 0 10%, transparent 11%),
    linear-gradient(154deg, rgba(255, 255, 255, 0.82), transparent 43%),
    linear-gradient(160deg, var(--cover-pale), #f7f0df 62%, #ded3bc);
}

.generated-cover::before {
  content: "";
  position: absolute;
  z-index: 0;
  inset: 0;
  opacity: 0.3;
  background:
    repeating-linear-gradient(90deg, rgba(69, 53, 34, 0.12) 0 1px, transparent 1px 6px),
    linear-gradient(90deg, transparent 11%, rgba(184, 52, 36, 0.32) 11% 12%, transparent 12%);
  mix-blend-mode: multiply;
  pointer-events: none;
}

.generated-cover-kicker {
  position: absolute;
  z-index: 3;
  top: 7px;
  left: 8px;
  color: var(--cover-deep);
  font-size: 5px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.generated-cover-title {
  position: absolute;
  z-index: 3;
  top: 16px;
  right: 10px;
  max-height: 78px;
  margin: 0;
  color: var(--cover-deep);
  font-family: "Noto Serif TC", "Noto Serif SC", "Songti SC", "PMingLiU", serif;
  font-size: 12px;
  font-weight: 850;
  line-height: 1.1;
  letter-spacing: 0.05em;
  writing-mode: vertical-rl;
}

.generated-cover-landscape {
  position: absolute;
  z-index: 1;
  right: -8%;
  bottom: 0;
  left: -8%;
  height: 54%;
  background:
    linear-gradient(142deg, transparent 0 25%, var(--cover-deep) 26% 44%, transparent 45%) 5% 100% / 46% 82% no-repeat,
    linear-gradient(218deg, transparent 0 29%, var(--cover-mid) 30% 52%, transparent 53%) 52% 100% / 62% 76% no-repeat,
    linear-gradient(152deg, transparent 0 34%, var(--cover-deep) 35% 57%, transparent 58%) 105% 100% / 58% 68% no-repeat,
    linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.42));
  opacity: 0.82;
  filter: blur(0.15px);
  clip-path: polygon(0 24%, 14% 34%, 28% 16%, 41% 43%, 57% 21%, 71% 45%, 88% 13%, 100% 31%, 100% 100%, 0 100%);
}

.generated-cover-seal {
  position: absolute;
  z-index: 4;
  right: 7px;
  bottom: 7px;
  display: grid;
  place-items: center;
  width: 15px;
  height: 15px;
  border: 1px solid rgba(184, 52, 36, 0.74);
  color: var(--qr-cinnabar);
  background: rgba(255, 248, 229, 0.66);
  font-family: "PMingLiU", serif;
  font-size: 8px;
  font-weight: 900;
}

.generated-cover[data-cover-tone="1"] { --cover-deep: #60382d; --cover-mid: #ad765e; --cover-pale: #eadbc4; }
.generated-cover[data-cover-tone="2"] { --cover-deep: #233a6d; --cover-mid: #7789ad; --cover-pale: #dcdccf; }
.generated-cover[data-cover-tone="3"] { --cover-deep: #4b354f; --cover-mid: #96799a; --cover-pale: #e4d8d2; }
.generated-cover[data-cover-tone="4"] { --cover-deep: #315339; --cover-mid: #79966f; --cover-pale: #dce2cc; }
.generated-cover[data-cover-tone="5"] { --cover-deep: #644f21; --cover-mid: #ad9454; --cover-pale: #ece1bf; }

.book-body {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: space-between;
}

.book-title {
  margin: 0;
  font-size: 22px;
  line-height: 1.38;
  word-break: break-word;
}

.book-meta { margin-top: 18px; }

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 11px;
  border: 1px solid rgba(91, 76, 50, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.52);
}

.pill strong {
  margin-left: 6px;
  color: var(--qr-jade);
}

.open {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 22px;
  color: var(--qr-cinnabar);
  font-weight: 900;
}

.open::after {
  content: "→";
  display: inline-block;
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.book[href]:hover .open::after { transform: translateX(5px); }

.chapter-hero {
  padding: 34px;
  margin-bottom: 22px;
}

.chapter-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 118px;
  gap: 22px;
  align-items: start;
}

.chapter-cover {
  width: 118px;
  height: 177px;
  overflow: hidden;
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  background: var(--qr-paper-soft);
  box-shadow: 0 14px 28px rgba(54, 40, 20, 0.12);
}

.chapter-cover img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.generated-cover-large .generated-cover-kicker {
  top: 11px;
  left: 12px;
  font-size: 7px;
}

.generated-cover-large .generated-cover-title {
  top: 26px;
  right: 16px;
  max-height: 116px;
  font-size: 17px;
}

.generated-cover-large .generated-cover-seal {
  right: 11px;
  bottom: 10px;
  width: 20px;
  height: 20px;
  font-size: 10px;
}

.chapter-hero h1 {
  max-width: 850px;
  margin: 14px 0 0;
  font-size: clamp(32px, 4.5vw, 50px);
  line-height: 1.2;
}

.chapter-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 12px;
  margin-top: 20px;
  opacity: 1;
  visibility: visible;
}

.chapter {
  display: block;
  min-height: 74px;
  padding: 14px 16px;
  border: 1px solid rgba(91, 76, 50, 0.18);
  border-radius: 8px;
  color: var(--qr-ink);
  background: rgba(255, 253, 246, 0.84);
  text-decoration: none;
  transition: transform 0.14s ease, border-color 0.14s ease, box-shadow 0.14s ease;
}

.chapter:hover {
  transform: translateY(-2px);
  border-color: rgba(31, 102, 83, 0.42);
  box-shadow: 0 12px 24px rgba(54, 40, 20, 0.10);
}

.chapter.current {
  border-color: rgba(184, 52, 36, 0.78);
  background: #fbedd2;
  box-shadow: 0 0 0 3px rgba(184, 52, 36, 0.10);
}

.chapter strong {
  display: block;
  margin-bottom: 5px;
  color: var(--qr-jade);
  font-size: 14px;
}

.chapter.current strong { color: var(--qr-cinnabar); }

.chapter span {
  display: block;
  font-size: 15px;
  font-weight: 760;
  line-height: 1.4;
}

.reading-record {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 20px;
  padding: 14px 16px;
  background: #fbedd2;
}

.reading-record.visible { display: flex; }
.reading-record strong { color: var(--qr-cinnabar); font-size: 18px; }

.article {
  position: relative;
  padding: clamp(24px, 4vw, 48px);
  background:
    linear-gradient(90deg, rgba(184, 52, 36, 0.05) 0 1px, transparent 1px),
    var(--qr-paper);
  background-size: 100% 1.9em;
  transition: background-color 0.28s ease, color 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.reading-progress {
  position: fixed;
  z-index: 60;
  inset: 0 0 auto;
  height: 3px;
  background: rgba(255, 253, 246, 0.12);
  pointer-events: none;
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--qr-cinnabar), #df7b47 72%, #f2bd70);
  box-shadow: 0 0 12px rgba(223, 123, 71, 0.55);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

.reader-settings-scrim {
  position: fixed;
  z-index: 44;
  inset: 0;
  border: 0;
  background: rgba(20, 17, 13, 0.34);
  opacity: 0;
  pointer-events: none;
  cursor: default;
  backdrop-filter: blur(2px);
  transition: opacity 0.24s ease;
}

.reader-settings {
  position: fixed;
  z-index: 50;
  top: 78px;
  right: 18px;
  width: min(390px, calc(100vw - 36px));
  max-height: calc(100vh - 96px);
  overflow: auto;
  padding: 24px;
  border: 1px solid var(--qr-line);
  border-radius: 12px;
  color: var(--qr-ink);
  background: rgba(255, 253, 246, 0.96);
  box-shadow: 0 28px 70px rgba(22, 17, 10, 0.28);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-12px) scale(0.98);
  transform-origin: top right;
  backdrop-filter: blur(18px);
  transition: opacity 0.22s ease, transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), background 0.25s ease;
}

.reader-settings.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.reader-settings-open .reader-settings-scrim {
  opacity: 1;
  pointer-events: auto;
}

.reader-settings-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--qr-line);
}

.reader-settings-head h2 {
  margin: 5px 0 4px;
  font-family: "Noto Serif TC", "Noto Serif SC", "Songti SC", "PMingLiU", serif;
  font-size: 27px;
  line-height: 1.2;
}

.reader-settings-head p {
  margin: 0;
  color: var(--qr-muted);
  font-size: 12px;
  font-weight: 700;
}

.reader-settings-close {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--qr-line);
  border-radius: 50%;
  color: var(--qr-muted);
  background: rgba(255, 255, 255, 0.42);
  font: 400 27px/1 Georgia, serif;
  cursor: pointer;
  transition: transform 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.reader-settings-close:hover {
  color: var(--qr-cinnabar);
  border-color: rgba(184, 52, 36, 0.42);
  transform: rotate(7deg);
}

.reader-setting-group { margin-top: 20px; }

.reader-setting-label {
  display: block;
  margin-bottom: 9px;
  color: var(--qr-muted);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.04em;
}

.reader-setting-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
  padding: 5px;
  border: 1px solid var(--qr-line);
  border-radius: 9px;
  background: rgba(117, 109, 96, 0.07);
}

.reader-setting-options button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 40px;
  padding: 0 10px;
  border: 0;
  border-radius: 6px;
  color: var(--qr-muted);
  background: transparent;
  font: 800 13px/1 "Segoe UI", "Microsoft JhengHei", sans-serif;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.reader-setting-options button:hover { color: var(--qr-ink); }

.reader-setting-options button.is-selected {
  color: var(--qr-ink);
  background: var(--qr-paper);
  box-shadow: 0 5px 14px rgba(54, 40, 20, 0.12);
  transform: translateY(-1px);
}

.theme-swatch {
  width: 16px;
  height: 16px;
  border: 1px solid rgba(91, 76, 50, 0.22);
  border-radius: 50%;
  box-shadow: inset 0 0 0 3px rgba(255, 255, 255, 0.22);
}

.theme-swatch.paper { background: #efe3c8; }
.theme-swatch.white { background: #ffffff; }
.theme-swatch.night { background: #172023; }

.reader-settings-reset {
  width: 100%;
  min-height: 42px;
  margin-top: 22px;
  border: 1px dashed var(--qr-line);
  border-radius: 8px;
  color: var(--qr-muted);
  background: transparent;
  font-weight: 800;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.reader-settings-reset:hover {
  color: var(--qr-cinnabar);
  border-color: rgba(184, 52, 36, 0.45);
  background: rgba(184, 52, 36, 0.05);
}

html[data-reader-theme="night"] .reader-settings {
  background: rgba(26, 34, 37, 0.97);
  box-shadow: 0 28px 74px rgba(0, 0, 0, 0.52);
}

html[data-reader-theme="night"] .reader-setting-options button.is-selected {
  background: #303b3e;
  box-shadow: 0 5px 16px rgba(0, 0, 0, 0.28);
}

html[data-reader-theme="night"] .reader-mood { opacity: 0.72; }
html[data-reader-theme="night"] .scroll-tools button {
  border-color: rgba(239, 232, 218, 0.16);
  background: rgba(26, 34, 37, 0.92);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.34);
}

.reader-mood {
  overflow: hidden;
  height: clamp(150px, 24vw, 240px);
  margin: 0 0 28px;
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  background: var(--qr-paper-soft);
}

.reader-mood img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article h1 {
  margin: 12px 0 26px;
  font-size: clamp(27px, 4vw, 38px);
  line-height: 1.35;
}

.content {
  color: var(--qr-text);
  font-family: "Noto Serif SC", "Noto Serif TC", "Songti SC", "SimSun", "PMingLiU", serif;
}

.content p {
  margin: 0 0 1.15em;
  text-indent: 2em;
  font-size: var(--qr-reader-font-size);
  line-height: var(--qr-reader-line-height);
  letter-spacing: 0;
  transition: font-size 0.25s ease, line-height 0.25s ease;
}

.reader-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 30px;
}

.reader-nav button { border: 0; cursor: pointer; font-family: inherit; }
.reader-nav span { color: var(--qr-muted); background: rgba(117, 109, 96, 0.12); }

.content p[data-speech-paragraph] {
  position: relative;
  margin-right: -14px;
  margin-left: -14px;
  padding: 5px 14px;
  border-radius: 7px;
  cursor: pointer;
  transition: color 0.2s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.content p[data-speech-paragraph]::before {
  content: "";
  position: absolute;
  top: 12%;
  bottom: 12%;
  left: 0;
  width: 3px;
  border-radius: 999px;
  background: var(--qr-cinnabar);
  opacity: 0;
  transform: scaleY(0.35);
  transition: opacity 0.2s ease, transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

.content p[data-speech-paragraph]:hover {
  background: rgba(31, 102, 83, 0.055);
}

.content p[data-speech-paragraph].speech-current {
  color: var(--qr-ink);
  background: linear-gradient(90deg, rgba(184, 52, 36, 0.11), rgba(251, 237, 210, 0.5));
  box-shadow: inset 0 0 0 1px rgba(184, 52, 36, 0.09);
}

.content p[data-speech-paragraph].speech-current::before {
  opacity: 1;
  transform: scaleY(1);
}

.content p[data-speech-paragraph].speech-resume-point::after {
  content: "上次讀到這裡";
  position: absolute;
  top: -10px;
  right: 14px;
  padding: 3px 8px;
  border-radius: 999px;
  color: var(--qr-cinnabar);
  background: var(--qr-paper-soft);
  box-shadow: 0 4px 12px rgba(54, 40, 20, 0.1);
  font: 800 10px/1.4 "Segoe UI", "Microsoft JhengHei", sans-serif;
  text-indent: 0;
}

html[data-reader-theme="night"] .content p[data-speech-paragraph]:hover {
  background: rgba(121, 160, 146, 0.08);
}

html[data-reader-theme="night"] .content p[data-speech-paragraph].speech-current {
  background: linear-gradient(90deg, rgba(184, 84, 57, 0.18), rgba(62, 73, 70, 0.24));
}

.speech-reader {
  position: fixed;
  z-index: 43;
  bottom: 22px;
  left: 18px;
  font-family: "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
}

.speech-reader[hidden] { display: none !important; }

.speech-reader.is-platform-disabled .speech-launch {
  min-width: 212px;
  color: var(--qr-muted);
  cursor: not-allowed;
  opacity: 0.86;
}

.speech-reader.is-platform-disabled .speech-launch:hover {
  transform: none;
  box-shadow: 0 14px 34px rgba(54, 40, 20, 0.18);
}

.speech-reader.is-platform-disabled .speech-launch-mark {
  color: var(--qr-paper);
  background: linear-gradient(145deg, var(--qr-indigo), #18284d);
  box-shadow: 0 7px 16px rgba(35, 58, 109, 0.2);
}

.speech-native-ios-safari .content p[data-speech-paragraph],
.reader-page[data-paragraph-speech-mode="off"] .content p[data-speech-paragraph] {
  cursor: text;
}

.speech-native-ios-safari .content p[data-speech-paragraph]:hover,
.reader-page[data-paragraph-speech-mode="off"] .content p[data-speech-paragraph]:hover {
  background: transparent;
}

.reader-page[data-paragraph-speech-mode="ai"] .content p[data-speech-paragraph]:hover {
  background: linear-gradient(90deg, rgba(59, 86, 145, 0.085), rgba(190, 132, 45, 0.055));
}

.speech-launch {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 154px;
  min-height: 54px;
  padding: 7px 8px;
  border: 1px solid var(--qr-line);
  border-radius: 999px;
  color: var(--qr-ink);
  background: rgba(255, 253, 246, 0.94);
  box-shadow: 0 14px 34px rgba(54, 40, 20, 0.18);
  cursor: pointer;
  backdrop-filter: blur(14px);
  transition: opacity 0.2s ease, transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.2s ease;
}

.speech-launch:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(54, 40, 20, 0.23);
}

.speech-launch.is-draggable {
  touch-action: none;
  user-select: none;
  cursor: grab;
}

.speech-reader.is-dragging { z-index: 48; }

.speech-reader.is-dragging .speech-launch {
  cursor: grabbing;
  transform: scale(0.98);
  box-shadow: 0 22px 46px rgba(54, 40, 20, 0.28);
}

.speech-reader.is-dragging .speech-launch::after {
  content: "";
  position: absolute;
  inset: -7px;
  border: 1px dashed rgba(31, 102, 83, 0.5);
  border-radius: 999px;
  pointer-events: none;
}

.speech-launch:focus-within {
  border-color: rgba(31, 102, 83, 0.58);
  box-shadow: 0 0 0 3px rgba(31, 102, 83, 0.13), 0 18px 40px rgba(54, 40, 20, 0.2);
}

.speech-launch-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--qr-paper);
  background: linear-gradient(145deg, var(--qr-jade), #153f35);
  box-shadow: 0 7px 16px rgba(31, 102, 83, 0.24);
  font-family: "Noto Serif TC", "Noto Serif SC", "PMingLiU", serif;
  font-size: 18px;
  font-weight: 900;
}

.speech-launch-play {
  flex: 0 0 auto;
  padding: 0 0 1px 2px;
  border: 0;
  cursor: pointer;
  font-family: "Segoe UI Symbol", sans-serif;
  font-size: 17px;
  line-height: 1;
  transition: transform 0.18s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.speech-launch-play:hover { transform: scale(1.06); }
.speech-launch-play:active { transform: scale(0.94); }
.speech-launch-play:focus-visible { outline: 2px solid var(--qr-paper); outline-offset: -4px; }
.speech-launch-play:disabled { cursor: not-allowed; }

.speech-launch-settings {
  align-self: stretch;
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  min-width: 0;
  padding: 0 9px 0 2px;
  color: inherit;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.speech-launch-settings:focus { outline: 0; }

.speech-launch-mark::after {
  content: "";
  position: absolute;
  inset: -4px;
  border: 1px solid rgba(31, 102, 83, 0.32);
  border-radius: 50%;
  opacity: 0;
}

.speech-reader.is-speaking .speech-launch-mark::after {
  animation: speechPulse 1.8s ease-out infinite;
}

.speech-reader.is-speaking .speech-launch-play {
  padding-left: 0;
  color: #fff8e8;
  background: linear-gradient(145deg, var(--qr-cinnabar), #8f3225);
  box-shadow: 0 7px 17px rgba(163, 61, 43, 0.3);
}

.speech-launch-copy {
  display: grid;
  min-width: 0;
  text-align: left;
}

.speech-launch-copy strong { font-size: 14px; line-height: 1.2; }
.speech-launch-copy small { margin-top: 3px; color: var(--qr-muted); font-size: 10px; font-weight: 750; }

.speech-panel {
  position: absolute;
  bottom: 0;
  left: 0;
  width: min(410px, calc(100vw - 36px));
  max-height: calc(100vh - 44px);
  overflow: auto;
  padding: 22px;
  border: 1px solid var(--qr-line);
  border-radius: 13px;
  color: var(--qr-ink);
  background: rgba(255, 253, 246, 0.97);
  box-shadow: 0 28px 72px rgba(28, 20, 10, 0.3);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px) scale(0.98);
  transform-origin: bottom left;
  backdrop-filter: blur(18px);
  transition: opacity 0.22s ease, transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), background 0.25s ease;
}

.speech-reader.is-open .speech-panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.speech-reader.is-open .speech-launch {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px) scale(0.96);
}

.speech-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.speech-panel-head h2 {
  margin: 5px 0 3px;
  font-family: "Noto Serif TC", "Noto Serif SC", "Songti SC", "PMingLiU", serif;
  font-size: 27px;
  line-height: 1.2;
}

.speech-panel-head p {
  min-height: 17px;
  margin: 0;
  color: var(--qr-muted);
  font-size: 12px;
  font-weight: 750;
}

.speech-close {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--qr-line);
  border-radius: 50%;
  color: var(--qr-muted);
  background: rgba(255, 255, 255, 0.42);
  font: 400 27px/1 Georgia, serif;
  cursor: pointer;
}

.speech-progress {
  margin-top: 18px;
  padding: 13px 14px;
  border: 1px solid var(--qr-line);
  border-radius: 9px;
  background: rgba(117, 109, 96, 0.06);
}

.speech-progress > div:first-child {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--qr-muted);
  font-size: 12px;
  font-weight: 800;
}

.speech-progress > div:first-child strong { color: var(--qr-jade); }

.speech-progress-track {
  height: 4px;
  margin-top: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(117, 109, 96, 0.13);
}

.speech-progress-track span {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--qr-cinnabar), #df7b47);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.28s ease;
}

.speech-transport {
  display: grid;
  grid-template-columns: 0.9fr 1.35fr 0.9fr 0.75fr;
  gap: 7px;
  margin-top: 14px;
}

.speech-transport button {
  min-height: 43px;
  padding: 0 9px;
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  color: var(--qr-ink);
  background: rgba(255, 255, 255, 0.44);
  font: 800 12px/1 "Segoe UI", "Microsoft JhengHei", sans-serif;
  cursor: pointer;
  transition: transform 0.18s ease, color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.speech-transport button:hover:not(:disabled) { transform: translateY(-1px); border-color: rgba(31, 102, 83, 0.45); }

.speech-transport button:disabled { opacity: 0.42; cursor: not-allowed; }

.speech-transport .speech-play {
  color: var(--qr-paper);
  border-color: var(--qr-jade);
  background: var(--qr-jade);
}

.speech-reader.is-speaking .speech-transport .speech-play {
  color: #fff8e8;
  border-color: var(--qr-cinnabar);
  background: var(--qr-cinnabar);
}

.speech-options {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(110px, 0.75fr);
  gap: 10px;
  margin-top: 16px;
}

.speech-options label { display: grid; gap: 7px; min-width: 0; }

.speech-options label > span {
  color: var(--qr-muted);
  font-size: 11px;
  font-weight: 850;
}

.speech-options select {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 0 34px 0 11px;
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  color: var(--qr-ink);
  background: var(--qr-paper);
  font: 750 12px/1.2 "Segoe UI", "Microsoft JhengHei", sans-serif;
}

.speech-switches {
  display: grid;
  gap: 8px;
  margin-top: 15px;
}

.speech-switches label {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 35px;
  color: var(--qr-text);
  font-size: 12px;
  font-weight: 750;
  cursor: pointer;
}

.speech-switches input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--qr-jade);
}

.paragraph-speech-mode {
  margin-top: 15px;
  padding: 10px;
  border: 1px solid rgba(31, 102, 83, 0.14);
  border-radius: 11px;
  background: linear-gradient(135deg, rgba(31, 102, 83, 0.055), rgba(251, 237, 210, 0.26));
}

.paragraph-speech-mode-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  color: var(--qr-muted);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.04em;
}

.paragraph-speech-mode-head strong {
  color: var(--qr-jade);
  font-size: 11px;
  letter-spacing: 0;
}

.paragraph-speech-mode-buttons {
  display: grid;
  grid-template-columns: 0.72fr 1fr 1.24fr;
  gap: 5px;
}

.paragraph-speech-mode-buttons button {
  min-width: 0;
  min-height: 34px;
  padding: 6px 7px;
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  color: var(--qr-muted);
  background: rgba(255, 253, 246, 0.82);
  font: 800 10px/1.2 "Segoe UI", "Microsoft JhengHei", sans-serif;
  cursor: pointer;
  transition: transform 0.18s ease, color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.paragraph-speech-mode-buttons button:hover:not(:disabled) { transform: translateY(-1px); }

.paragraph-speech-mode-buttons button[aria-pressed="true"] {
  color: #fffdf5;
  border-color: var(--qr-jade);
  background: var(--qr-jade);
  box-shadow: 0 5px 13px rgba(31, 102, 83, 0.18);
}

.paragraph-speech-mode-buttons button[data-click-speech-mode="ai"][aria-pressed="true"] {
  border-color: var(--ai-deep, #3b5691);
  background: linear-gradient(135deg, var(--ai-deep, #3b5691), #263d70);
  box-shadow: 0 5px 13px rgba(42, 64, 112, 0.22);
}

.paragraph-speech-mode-buttons button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

.reader-page[data-ai-enabled="0"] [data-click-speech-mode="ai"] { display: none; }

.reader-page[data-ai-enabled="0"] .paragraph-speech-mode-buttons {
  grid-template-columns: 0.72fr 1.5fr;
}

.paragraph-speech-mode-ai {
  border-color: rgba(59, 86, 145, 0.16);
  background: linear-gradient(135deg, rgba(59, 86, 145, 0.065), rgba(190, 132, 45, 0.075));
}

.paragraph-speech-mode-ai .paragraph-speech-mode-head strong { color: var(--ai-deep); }

.speech-help,
.speech-warning {
  margin: 13px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--qr-line);
  color: var(--qr-muted);
  font-size: 11px;
  font-weight: 650;
  line-height: 1.55;
}

.speech-warning { color: var(--qr-cinnabar); }

.speech-install {
  margin-top: 14px;
  padding: 14px;
  border: 1px solid rgba(184, 52, 36, 0.2);
  border-radius: 9px;
  background: linear-gradient(135deg, rgba(251, 237, 210, 0.72), rgba(255, 253, 246, 0.5));
}

.speech-install-title {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.speech-install-title > span {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  color: #fffaf0;
  background: var(--qr-cinnabar);
  font-family: "Noto Serif TC", "Noto Serif SC", "PMingLiU", serif;
  font-size: 16px;
  font-weight: 900;
}

.speech-install-title strong {
  display: block;
  color: var(--qr-ink);
  font-size: 13px;
}

.speech-install-title p {
  margin: 4px 0 0;
  color: var(--qr-muted);
  font-size: 11px;
  font-weight: 650;
  line-height: 1.5;
}

.speech-install-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  margin-top: 12px;
}

.speech-install-actions a,
.speech-install-actions button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 39px;
  padding: 7px 9px;
  border: 1px solid var(--qr-line);
  border-radius: 7px;
  color: var(--qr-ink);
  background: rgba(255, 255, 255, 0.5);
  text-align: center;
  text-decoration: none;
  font: 800 11px/1.35 "Segoe UI", "Microsoft JhengHei", sans-serif;
  cursor: pointer;
}

.speech-install-actions a.primary {
  color: var(--qr-paper);
  border-color: var(--qr-jade);
  background: var(--qr-jade);
}

.speech-install-actions button {
  grid-column: 1 / -1;
  border-style: dashed;
  color: var(--qr-jade);
}

.speech-install-actions a:hover,
.speech-install-actions button:hover {
  transform: translateY(-1px);
  border-color: rgba(31, 102, 83, 0.48);
}

html[data-reader-theme="night"] .speech-launch,
html[data-reader-theme="night"] .speech-panel {
  background: rgba(26, 34, 37, 0.97);
  box-shadow: 0 28px 74px rgba(0, 0, 0, 0.5);
}

html[data-reader-theme="night"] .speech-transport button,
html[data-reader-theme="night"] .speech-options select {
  background-color: #242e31;
}

html[data-reader-theme="night"] .speech-install {
  background: linear-gradient(135deg, rgba(184, 84, 57, 0.13), rgba(36, 46, 49, 0.68));
}

html[data-reader-theme="night"] .speech-install-actions a,
html[data-reader-theme="night"] .speech-install-actions button {
  background-color: #242e31;
}

html[data-reader-theme="night"] .speech-install-actions a.primary {
  background: var(--qr-jade);
}

@keyframes speechPulse {
  from { opacity: 0.58; transform: scale(0.82); }
  to { opacity: 0; transform: scale(1.35); }
}

/* Local AI audiobook studio */
.content p[data-speech-paragraph].ai-speech-current {
  position: relative;
  background:
    linear-gradient(90deg, rgba(35, 58, 109, 0.13), rgba(190, 132, 45, 0.08) 62%, transparent);
  box-shadow: inset 3px 0 0 #be842d;
}

.content p[data-speech-paragraph].ai-speech-current::after {
  content: "AI";
  position: absolute;
  top: 7px;
  right: 8px;
  padding: 3px 7px;
  border: 1px solid rgba(35, 58, 109, 0.15);
  border-radius: 999px;
  color: var(--qr-indigo);
  background: rgba(255, 253, 246, 0.82);
  font: 900 9px/1.3 "Segoe UI", "Microsoft JhengHei", sans-serif;
  letter-spacing: 0.08em;
  text-indent: 0;
}

.ai-speech-reader {
  --ai-accent: #be842d;
  --ai-deep: #233a6d;
  position: fixed;
  z-index: 44;
  bottom: 88px;
  left: 18px;
  font-family: "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
}

.ai-speech-reader[hidden] { display: none !important; }

.ai-speech-launch {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 168px;
  min-height: 56px;
  padding: 7px 16px 7px 8px;
  overflow: hidden;
  border: 1px solid rgba(35, 58, 109, 0.28);
  border-radius: 999px;
  color: var(--qr-ink);
  background:
    linear-gradient(105deg, rgba(255, 253, 246, 0.98), rgba(246, 239, 220, 0.96));
  box-shadow: 0 16px 38px rgba(27, 34, 58, 0.22);
  cursor: pointer;
  backdrop-filter: blur(16px);
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.2s ease, opacity 0.2s ease;
}

.ai-speech-launch::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 54px;
  height: 100%;
  opacity: 0.55;
  background: repeating-linear-gradient(90deg, transparent 0 5px, rgba(190, 132, 45, 0.11) 5px 6px);
  mask-image: linear-gradient(90deg, transparent, #000);
  pointer-events: none;
}

.ai-speech-launch:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 46px rgba(27, 34, 58, 0.28);
}

.ai-speech-launch-mark {
  position: relative;
  z-index: 1;
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 248, 227, 0.28);
  border-radius: 12px;
  color: #fff8e3;
  background: linear-gradient(145deg, #304b87, #172649 72%);
  box-shadow: 0 8px 18px rgba(35, 58, 109, 0.3), inset 0 1px rgba(255, 255, 255, 0.16);
  font: 900 13px/1 Georgia, serif;
  letter-spacing: 0.04em;
}

.ai-speech-launch-mark::after {
  content: "";
  position: absolute;
  inset: -5px;
  border: 1px solid rgba(190, 132, 45, 0.48);
  border-radius: 15px;
  opacity: 0;
}

.ai-speech-reader.is-speaking .ai-speech-launch-mark::after {
  animation: aiSpeechPulse 1.7s ease-out infinite;
}

.ai-speech-reader.is-generating .ai-speech-launch-mark {
  background: linear-gradient(145deg, #c28b35, #7f5419);
  animation: aiSpeechBreathe 1.2s ease-in-out infinite alternate;
}

.ai-speech-launch-copy {
  position: relative;
  z-index: 1;
  display: grid;
  min-width: 0;
  text-align: left;
}

.ai-speech-launch-copy strong { font-size: 14px; line-height: 1.2; }
.ai-speech-launch-copy small { margin-top: 3px; color: var(--qr-muted); font-size: 10px; font-weight: 800; }

.ai-speech-panel {
  position: absolute;
  bottom: 0;
  left: 0;
  width: min(438px, calc(100vw - 36px));
  max-height: calc(100vh - 44px);
  overflow: auto;
  padding: 22px;
  border: 1px solid rgba(35, 58, 109, 0.26);
  border-radius: 15px;
  color: var(--qr-ink);
  background:
    linear-gradient(145deg, rgba(255, 253, 246, 0.985), rgba(248, 242, 227, 0.975));
  box-shadow: 0 30px 78px rgba(24, 29, 47, 0.34);
  opacity: 0;
  pointer-events: none;
  transform: translateY(14px) scale(0.975);
  transform-origin: bottom left;
  backdrop-filter: blur(20px);
  transition: opacity 0.22s ease, transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), background 0.25s ease;
}

.ai-speech-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  border-radius: 15px 15px 0 0;
  background: linear-gradient(90deg, var(--ai-deep), var(--ai-accent) 72%, #dfb665);
}

.ai-speech-reader.is-open .ai-speech-panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.ai-speech-reader.is-open .ai-speech-launch {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px) scale(0.96);
}

.ai-speech-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.ai-speech-panel-head .eyebrow {
  color: var(--ai-accent);
  font: 900 9px/1.2 "Segoe UI", sans-serif;
  letter-spacing: 0.16em;
}

.ai-speech-panel-head h2 {
  margin: 5px 0 3px;
  font-family: "Noto Serif TC", "Noto Serif SC", "Songti SC", "PMingLiU", serif;
  font-size: 27px;
  line-height: 1.2;
}

.ai-speech-panel-head p {
  min-height: 17px;
  margin: 0;
  color: var(--qr-muted);
  font-size: 12px;
  font-weight: 750;
}

.ai-speech-close {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--qr-line);
  border-radius: 50%;
  color: var(--qr-muted);
  background: rgba(255, 255, 255, 0.42);
  font: 400 27px/1 Georgia, serif;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.ai-speech-close:hover { transform: rotate(8deg); border-color: rgba(190, 132, 45, 0.58); }

.ai-speech-progress {
  margin-top: 18px;
  padding: 13px 14px;
  border: 1px solid rgba(35, 58, 109, 0.14);
  border-radius: 10px;
  background: rgba(35, 58, 109, 0.055);
}

.ai-speech-progress > div:first-child {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--qr-muted);
  font-size: 12px;
  font-weight: 800;
}

.ai-speech-progress > div:first-child strong { color: var(--ai-deep); }

.ai-speech-progress-track {
  height: 5px;
  margin-top: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(35, 58, 109, 0.11);
}

.ai-speech-progress-track span {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--ai-deep), var(--ai-accent));
  box-shadow: 0 0 12px rgba(190, 132, 45, 0.35);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.32s ease;
}

.ai-speech-transport {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr 0.9fr 0.75fr;
  gap: 7px;
  margin-top: 14px;
}

.ai-speech-transport button {
  min-height: 44px;
  padding: 0 9px;
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  color: var(--qr-ink);
  background: rgba(255, 255, 255, 0.48);
  font: 800 12px/1 "Segoe UI", "Microsoft JhengHei", sans-serif;
  cursor: pointer;
  transition: transform 0.18s ease, color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.ai-speech-transport button:hover:not(:disabled) { transform: translateY(-1px); border-color: rgba(190, 132, 45, 0.6); }
.ai-speech-transport button:disabled { opacity: 0.42; cursor: not-allowed; }

.ai-speech-transport .ai-speech-play {
  color: #fff9e9;
  border-color: var(--ai-deep);
  background: var(--ai-deep);
  box-shadow: 0 7px 16px rgba(35, 58, 109, 0.2);
}

.ai-speech-reader.is-speaking .ai-speech-transport .ai-speech-play {
  border-color: #a96f1e;
  background: #a96f1e;
}

.ai-speech-reader.is-generating .ai-speech-transport .ai-speech-play {
  color: #68440f;
  border-color: #e4c687;
  background: repeating-linear-gradient(110deg, #f1d9a7 0 12px, #e9c880 12px 24px);
  background-size: 160% 100%;
  animation: aiSpeechStripe 1.15s linear infinite;
}

.ai-speech-options {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1.05fr) minmax(86px, 0.72fr);
  gap: 9px;
  margin-top: 16px;
}

.ai-speech-options label { display: grid; gap: 7px; min-width: 0; }

.ai-speech-options label > span {
  color: var(--qr-muted);
  font-size: 11px;
  font-weight: 850;
}

.ai-speech-options select {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 0 30px 0 10px;
  border: 1px solid var(--qr-line);
  border-radius: 8px;
  color: var(--qr-ink);
  background: var(--qr-paper);
  font: 750 11px/1.2 "Segoe UI", "Microsoft JhengHei", sans-serif;
}

.ai-speech-options select:disabled {
  opacity: 0.62;
  cursor: not-allowed;
}

.ai-speech-switches {
  display: grid;
  gap: 8px;
  margin-top: 15px;
}

.ai-speech-switches label {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 34px;
  color: var(--qr-text);
  font-size: 12px;
  font-weight: 750;
  cursor: pointer;
}

.ai-speech-switches input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--ai-deep);
}

.ai-speech-help {
  margin: 13px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--qr-line);
  color: var(--qr-muted);
  font-size: 11px;
  font-weight: 650;
  line-height: 1.55;
}

.ai-login-required a { color: var(--ai-deep); font-weight: 900; }

html[data-reader-theme="night"] .content p[data-speech-paragraph].ai-speech-current {
  background: linear-gradient(90deg, rgba(63, 91, 151, 0.24), rgba(190, 132, 45, 0.11), transparent);
}

html[data-reader-theme="night"] .content p[data-speech-paragraph].ai-speech-current::after {
  color: #e7bf6f;
  background: rgba(26, 34, 37, 0.86);
}

html[data-reader-theme="night"] .ai-speech-launch,
html[data-reader-theme="night"] .ai-speech-panel {
  background: linear-gradient(145deg, rgba(27, 35, 43, 0.985), rgba(22, 29, 36, 0.98));
  box-shadow: 0 30px 78px rgba(0, 0, 0, 0.52);
}

html[data-reader-theme="night"] .ai-speech-transport button,
html[data-reader-theme="night"] .ai-speech-options select,
html[data-reader-theme="night"] .ai-speech-close {
  background-color: #242e35;
}

html[data-reader-theme="night"] .paragraph-speech-mode {
  border-color: rgba(181, 197, 190, 0.13);
  background: linear-gradient(135deg, rgba(89, 126, 113, 0.09), rgba(184, 132, 57, 0.055));
}

html[data-reader-theme="night"] .paragraph-speech-mode-buttons button {
  color: #b8c1bd;
  border-color: rgba(190, 201, 196, 0.16);
  background: #242e35;
}

html[data-reader-theme="night"] .ai-speech-progress { background: rgba(77, 106, 169, 0.09); }
html[data-reader-theme="night"] .ai-speech-progress > div:first-child strong { color: #e2b866; }
html[data-reader-theme="night"] .ai-login-required a { color: #e2b866; }

@keyframes aiSpeechPulse {
  from { opacity: 0.72; transform: scale(0.84); }
  to { opacity: 0; transform: scale(1.38); }
}

@keyframes aiSpeechBreathe {
  from { transform: scale(0.96); filter: saturate(0.9); }
  to { transform: scale(1.025); filter: saturate(1.12); }
}

@keyframes aiSpeechStripe {
  to { background-position: -160% 0; }
}

.empty {
  padding: 22px;
  border: 1px dashed var(--qr-line);
  border-radius: 8px;
  color: var(--qr-muted);
  background: rgba(255, 253, 246, 0.72);
}

.empty-illustrated {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}

.empty-illustrated img {
  width: 100%;
  max-height: 150px;
  border-radius: 8px;
  object-fit: cover;
}

.scroll-tools {
  position: fixed;
  right: 18px;
  bottom: 22px;
  z-index: 40;
  display: grid;
  gap: 8px;
}

.scroll-tools button {
  min-width: 52px;
  height: 42px;
  padding: 0 10px;
  border: 1px solid rgba(91, 76, 50, 0.18);
  border-radius: 999px;
  color: var(--qr-cinnabar);
  background: rgba(255, 253, 246, 0.88);
  box-shadow: 0 10px 24px rgba(54, 40, 20, 0.13);
  font: 900 12px/1 "Segoe UI", sans-serif;
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1), color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.scroll-tools button:hover {
  color: var(--qr-paper);
  background: var(--qr-cinnabar);
  box-shadow: 0 12px 28px rgba(184, 52, 36, 0.24);
  transform: translateY(-2px);
}

/* Progressive motion: content remains fully visible when JavaScript is unavailable. */
.motion-ready [data-reveal] {
  --reveal-x: 0px;
  --reveal-y: 18px;
  --reveal-delay: 0ms;
  --reveal-stagger-delay: 0ms;
  opacity: 0;
  transform: translate3d(var(--reveal-x), var(--reveal-y), 0);
  transition:
    opacity 0.62s ease var(--reveal-delay),
    transform 0.72s cubic-bezier(0.22, 1, 0.36, 1) var(--reveal-delay);
  transition-delay: calc(var(--reveal-delay) + var(--reveal-stagger-delay));
}

.motion-ready [data-reveal="down"] { --reveal-y: -12px; }
.motion-ready [data-reveal="left"] { --reveal-x: 22px; --reveal-y: 0px; }
.motion-ready [data-reveal="right"] { --reveal-x: -22px; --reveal-y: 0px; }
.motion-ready [data-reveal-delay="1"] { --reveal-delay: 90ms; }
.motion-ready [data-reveal-delay="2"] { --reveal-delay: 180ms; }
.motion-ready [data-reveal-delay="3"] { --reveal-delay: 270ms; }

.motion-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

.motion-ready .reader-enter-next .article[data-reveal] { --reveal-x: 20px; --reveal-y: 0px; }
.motion-ready .reader-enter-prev .article[data-reveal] { --reveal-x: -20px; --reveal-y: 0px; }

.motion-ready body.reader-leave-next .article[data-reveal].is-visible {
  opacity: 0;
  transform: translate3d(-15px, 0, 0);
  transition: opacity 0.16s ease, transform 0.17s ease;
}

.motion-ready body.reader-leave-prev .article[data-reveal].is-visible {
  opacity: 0;
  transform: translate3d(15px, 0, 0);
  transition: opacity 0.16s ease, transform 0.17s ease;
}

.motion-ready .book[data-reveal].is-visible:hover {
  transform: translateY(-4px);
}

.motion-ready .hero-illustration.is-visible img {
  animation: quietKenBurns 18s ease-in-out 0.35s infinite alternate;
}

.motion-ready .hero-illustration.is-visible::before {
  animation: lamplight 7s ease-in-out 0.6s infinite alternate;
}

.motion-ready .chapter-list[data-chapter-reveal] .chapter:nth-child(-n+12) {
  opacity: 0;
  transform: translateY(9px);
}

.motion-ready .chapter-list[data-chapter-reveal].is-visible .chapter:nth-child(-n+12) {
  animation: chapterRise 0.5s cubic-bezier(0.22, 1, 0.36, 1) var(--chapter-delay, 0ms) forwards;
}

.motion-ready .scroll-tools {
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.22s ease, transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.motion-ready .scroll-tools.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@keyframes quietKenBurns {
  from { transform: scale(1); }
  to { transform: scale(1.035); }
}

@keyframes lamplight {
  from { opacity: 0.52; transform: scale(0.96); }
  to { opacity: 0.82; transform: scale(1.04); }
}

@keyframes chapterRise {
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 780px) {
  .site-shell { padding: 20px 14px 44px; }
  .reader-shell { padding: 82px 12px 32px; }
  .topbar { align-items: flex-start; }
  .hero { grid-template-columns: 1fr; }
  .hero-illustration { min-height: 230px; }
  .hero-card,
  .chapter-hero { padding: 22px; }
  .stats-card { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .actions { justify-content: flex-end; }
  .books,
  .chapter-list { grid-template-columns: 1fr; }
  .chapter-hero-grid { grid-template-columns: 1fr; }
  .chapter-cover { width: min(118px, 40vw); height: auto; aspect-ratio: 2 / 3; }
  .empty-illustrated { grid-template-columns: 1fr; }
  .section-title { align-items: flex-start; flex-direction: column; }
  .reader-bar { padding: 0 12px; }
  .reader-bar .reader-subtitle { display: none; }
  .reader-bar .reader-account { display: none; }
  .reader-bar .actions { gap: 6px; }
  .reader-bar .button { min-height: 36px; padding: 0 10px; font-size: 13px; }
  .reader-nav { grid-template-columns: repeat(3, 1fr); }
  .scroll-tools { right: 10px; bottom: 14px; }
  .scroll-tools button { min-width: 48px; height: 38px; }
  .speech-reader { right: auto; bottom: 14px; left: 10px; }
  .ai-speech-reader { right: auto; bottom: 82px; left: 10px; }
  .motion-ready [data-reveal="left"],
  .motion-ready [data-reveal="right"] { --reveal-x: 0px; --reveal-y: 12px; }
  .motion-ready .hero-illustration.is-visible img { animation: none; }
  .motion-ready .hero-illustration.is-visible::before { animation-duration: 10s; }
}

@media (max-width: 460px) {
  .brand span { display: none; }
  .stats-card { grid-template-columns: 1fr; }
  .actions .button:not(.primary) { display: none; }
  .book { grid-template-columns: 64px minmax(0, 1fr); gap: 12px; padding-right: 16px; }
  .book-cover {
    flex-basis: 64px;
    width: 64px;
    min-width: 64px;
    max-width: 64px;
    height: 96px;
    min-height: 96px;
    max-height: 96px;
  }
  .content p { text-indent: 1.6em; }
  .reader-heading { max-width: 82px; }
  .reader-title { font-size: 14px; }
  .reader-bar.is-compact .reader-title { font-size: 13px; }
  .reader-bar .reader-settings-toggle,
  .reader-bar .reader-directory { display: inline-flex !important; }
  .reader-bar .actions { flex-wrap: nowrap; }
  .reader-bar .button { padding: 0 9px; }
}

@media (max-width: 600px) {
  .reader-settings {
    inset: auto 0 0;
    width: 100%;
    max-height: min(82vh, 680px);
    padding: 22px 18px calc(22px + env(safe-area-inset-bottom));
    border-width: 1px 0 0;
    border-radius: 17px 17px 0 0;
    transform: translateY(102%);
    transform-origin: bottom center;
  }
  .reader-settings.is-open { transform: translateY(0); }
  .reader-settings-open { overflow: hidden; }
  .reader-settings-head h2 { font-size: 24px; }
  .speech-panel-open { overflow: hidden; }
  .ai-speech-panel-open { overflow: hidden; }
  .speech-reader.is-open::before {
    content: "";
    position: fixed;
    z-index: -1;
    inset: 0;
    background: rgba(20, 17, 13, 0.38);
    backdrop-filter: blur(2px);
  }
  .speech-panel {
    position: fixed;
    inset: auto 0 0;
    width: 100%;
    max-height: min(82vh, 690px);
    padding: 22px 18px calc(20px + env(safe-area-inset-bottom));
    border-width: 1px 0 0;
    border-radius: 17px 17px 0 0;
    transform: translateY(102%);
    transform-origin: bottom center;
  }
  .speech-reader.is-open .speech-panel { transform: translateY(0); }
  .speech-panel-head h2 { font-size: 24px; }
  .ai-speech-reader.is-open::before {
    content: "";
    position: fixed;
    z-index: -1;
    inset: 0;
    background: rgba(16, 19, 29, 0.44);
    backdrop-filter: blur(2px);
  }
  .ai-speech-panel {
    position: fixed;
    inset: auto 0 0;
    width: 100%;
    max-height: min(86vh, 720px);
    padding: 22px 18px calc(20px + env(safe-area-inset-bottom));
    border-width: 1px 0 0;
    border-radius: 18px 18px 0 0;
    transform: translateY(102%);
    transform-origin: bottom center;
  }
  .ai-speech-panel::before { border-radius: 18px 18px 0 0; }
  .ai-speech-reader.is-open .ai-speech-panel { transform: translateY(0); }
  .ai-speech-panel-head h2 { font-size: 24px; }
  .ai-speech-options { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ai-speech-options label:last-child { grid-column: 1 / -1; }
}

@media (max-width: 390px) {
  .ai-speech-launch { min-width: 154px; padding-right: 13px; }
  .ai-speech-transport { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .ai-speech-transport .ai-speech-play { grid-column: span 2; }
  .ai-speech-options { grid-template-columns: 1fr; }
  .ai-speech-options label:last-child { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }
}