/* Reader-only layout. The scroll view remains the complete, natural document. */
.reader-start-reading {
  align-self: flex-start;
  margin: 4px 0 22px;
  min-height: 48px;
}
.reader-pages-section {
  scroll-margin-top: calc(var(--reader-header-h, 64px) + 12px);
}
.reader-pages-section:focus { outline: none; }
.reader-pages-head { margin-bottom: 12px; }
.reader-book-nav {
  position: sticky;
  top: calc(var(--reader-header-h, 64px) + 8px);
  z-index: 25;
  display: grid;
  grid-template-columns: minmax(100px, auto) minmax(0, 1fr) minmax(100px, auto);
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto 12px;
  padding: 6px;
  border: 1px solid var(--reader-edge, #dcd4c3);
  border-radius: 16px;
  background: var(--reader-paper, #fffdf8);
  box-shadow: 0 4px 18px rgb(20 15 35 / 8%);
  color: var(--reader-ink, #2b2733);
}
.reader-book-nav.hidden { display: none; }
.reader-book-nav .swiper-button-prev,
.reader-book-nav .swiper-button-next {
  position: static;
  inset: auto;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  width: auto;
  height: auto;
  min-height: 44px;
  margin: 0;
  padding: 10px 14px;
  border: 1px solid currentColor;
  border-radius: 11px;
  background: transparent;
  color: inherit;
  font: 600 0.94rem/1.2 var(--font-ui);
  cursor: pointer;
  transform: none;
}
.reader-book-nav .swiper-button-prev::after,
.reader-book-nav .swiper-button-next::after { display: none; }
.reader-book-nav button:disabled { opacity: 0.42; cursor: default; }
.reader-book-nav button:not(:disabled):hover { background: rgb(128 100 160 / 10%); }
.reader-book-nav button:focus-visible,
.reader-start-reading:focus-visible { outline: 3px solid var(--accent, #7c3aed); outline-offset: 3px; }
.reader-book-position {
  font: 600 0.88rem/1.4 var(--font-ui);
  text-align: center;
  text-wrap: balance;
}
:root .reader-pages-section .reader-page-topline .reader-page-num,
:root .reader-pages-section .reader-leaf-num { color: var(--reader-ink, #2b2733); }
.reader-swiper {
  padding-bottom: 0;
  scroll-margin-top: calc(var(--reader-header-h, 64px) + 82px);
}
.reader-swiper .reader-page-body { position: relative; }
.reader-swiper .reader-marg .reader-page-body::after { margin-top: 20px; }
.reader-swiper .reader-page-text {
  font-size: 1.2rem;
  line-height: 1.65;
}
.reader-swiper .reader-density-compact .reader-page-text,
.reader-swiper .reader-density-tight .reader-page-text { font-size: 1.125rem; }
.reader-swiper .reader-page-img { object-fit: contain; }

@media (min-width: 1180px) {
  .reader-swiper {
    --reader-spread-h: clamp(420px, calc(100svh - var(--reader-header-h, 64px) - var(--reader-nav-h, 58px) - var(--reader-audio-h, 0px) - 42px), 700px);
  }
  .reader-swiper .reader-page-card:not(.reader-cover-card) .reader-page-body {
    justify-content: safe center;
    padding: 28px 40px;
  }
  .reader-swiper .reader-cover-body .reader-page-title { font-size: clamp(2rem, 3.5vw, 3.75rem); }
}

@media (max-width: 1179px) {
  .reader-swiper {
    --reader-spread-h: max(300px, calc(100svh - var(--reader-header-h, 64px) - var(--reader-nav-h, 56px) - var(--reader-audio-h, 0px) - 36px));
  }
  .reader-swiper .swiper-slide,
  .reader-swiper .reader-page-card { height: var(--reader-spread-h); }
  .reader-swiper .reader-page-card:not(.reader-cover-card) { display: flex; flex-direction: column; }
  .reader-swiper .reader-cover-card { grid-template-rows: minmax(0, 52%) minmax(0, 48%); }
  .reader-swiper .reader-page-card:not(.reader-cover-card) .reader-page-img,
  .reader-swiper .reader-cover-card .reader-cover-img {
    display: block;
    width: 100%;
    height: 34%;
    flex: 0 0 34%;
    max-height: none;
    aspect-ratio: auto;
    object-fit: contain;
    background: var(--reader-plate, #f2eee5);
  }
  .reader-swiper .reader-cover-card .reader-cover-img { height: 100%; }
  .reader-swiper .reader-page-body,
  .reader-swiper .reader-cover-body {
    display: flex;
    flex-direction: column;
    justify-content: safe center;
    flex: 1 1 auto;
    min-height: 0;
    padding: 22px 26px 30px;
    overflow-y: auto;
  }
  .reader-swiper .reader-marg .reader-page-body::after { display: none; }
  .reader-swiper .reader-cover-body .reader-page-title {
    font-size: clamp(1.65rem, 4vw, 2.5rem);
    line-height: 1.15;
    max-width: 24ch;
  }
}

/* Book mode paginates text at its normal size on phones as well as desktops.
   These columns retain the original nodes for voice highlighting and selection. */
.reader-swiper .reader-page-body.is-paged { position: relative; overflow: clip; }
.reader-swiper .is-paged .reader-page-text {
  flex: 0 0 auto;
  height: var(--leaf-h);
  column-width: var(--leaf-w);
  column-gap: var(--leaf-w);
  column-fill: auto;
  transform: translate3d(calc(var(--leaf, 0) * -2 * var(--leaf-w)), 0, 0);
  transition: transform 240ms ease;
}
.reader-swiper .reader-leaf-more { display: none; }
.reader-swiper .reader-leaf-num { margin-left: 8px; font-size: 0.75rem; }
.reader-swiper .reader-leaf-num:empty { display: none; }

/* A short landscape window or a large audio bar cannot fit a legible page.
   Keep natural document scrolling in that case, with navigation still pinned. */
.reader-swiper.reader-natural-book .swiper-slide,
.reader-swiper.reader-natural-book .reader-page-card { height: auto; }
.reader-swiper.reader-natural-book .reader-page-card:not(.reader-cover-card) { flex-direction: column; }
.reader-swiper.reader-natural-book .reader-page-card .reader-page-img {
  width: 100%;
  max-width: none;
  height: 180px;
  max-height: 180px;
  flex: 0 0 auto;
}
.reader-swiper.reader-natural-book .reader-page-card .reader-page-body {
  width: 100%;
  overflow-y: visible;
}
.reader-swiper.reader-natural-book .reader-cover-card { grid-template-rows: auto auto; }

@media (max-width: 920px) {
  .reader-hero.reader-hero-has-cover .reader-hero-cover {
    min-height: 0;
    height: clamp(160px, 25svh, 230px);
  }
  .reader-hero.reader-hero-has-cover .reader-hero-cover img { object-fit: contain; }
  .reader-hero.reader-hero-has-cover .reader-hero-content { padding: 22px 20px 26px; }
  .reader-meta-row { gap: 6px; margin-bottom: 12px; }
  .reader-title { font-size: clamp(1.6rem, 5.5vw, 2.2rem); }
  .reader-start-reading { width: 100%; justify-content: center; margin-bottom: 18px; }
}
@media (max-width: 600px) {
  .reader-book-nav { gap: 4px; padding: 5px; border-radius: 13px; }
  .reader-book-nav { grid-template-columns: auto minmax(0, 1fr) auto; }
  .reader-book-nav .swiper-button-prev,
  .reader-book-nav .swiper-button-next { padding: 10px; font-size: 0.875rem; gap: 5px; }
  .reader-book-position { font-size: 0.8rem; }
  .reader-swiper .reader-page-body,
  .reader-swiper .reader-cover-body { padding: 18px 20px 26px; }
  .reader-swiper .reader-page-text { font-size: 1.125rem; line-height: 1.65; }
}
@media print {
  .reader-book-nav, .reader-start-reading { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .reader-swiper .is-paged .reader-page-text { transition: none; }
}