/* Reader app shell — regions for modular features (TOC, karaoke, ads, …) */

/* Book page body only (player settings can adjust --reader-book-font-scale). */
.reader-app .book-page-body {
  font-size: calc(clamp(1.02rem, 0.99rem + 0.12vw, 1.1rem) * var(--reader-book-font-scale, 1));
}

/* Opt-in prose: first-line indent on every <p> (scoped to reader so it always wins over base styles). */
.reader-app .book-page-body.book-text--paragraph-indent p {
  text-indent: 1.5em;
}

.reader-app .book-page-body.book-text--paragraph-indent p.book-para--no-indent {
  text-indent: 0;
}

.reader-page .nav {
  max-width: none;
}

/* Same --reader-player-height token as reader shell (footer sits outside .reader-app). */
body.reader-page {
  --reader-player-height: 8.25rem;
}

.reader-page .site-footer {
  margin-top: 0;
}

/* Reading pages: keep footer links above the fixed audio dock. */
.reader-page--player .site-footer {
  padding-bottom: calc(1rem + var(--reader-player-height) + env(safe-area-inset-bottom, 0px));
}

.assignment-focus .site-header .nav-list {
  display: none;
}

.assignment-focus .reader-sidebar[data-reader-region="sidebar"] {
  display: flex;
}

.assignment-focus .site-header .logo {
  pointer-events: none;
  cursor: default;
  text-decoration: none;
}

.assignment-focus .book-page .breadcrumb {
  display: none;
}

.assignment-focus #reader-book-title {
  pointer-events: none;
  cursor: default;
  text-decoration: none;
}

.assignment-focus #reader-page-meta {
  display: block;
}

.assignment-focus:not(.assignment-sidebar-ready) .reader-sidebar[data-reader-region="sidebar"] .reader-sidebar-slot nav {
  visibility: hidden;
}

.assignment-focus:not(.assignment-meta-ready) #reader-page-meta {
  visibility: hidden;
}

.assignment-focus:not(.assignment-nav-ready) a[rel="prev"],
.assignment-focus:not(.assignment-nav-ready) a[rel="next"] {
  pointer-events: none;
}

.reader-reading-root {
  display: block;
  min-height: 0;
}

.reader-app {
  --reader-sidebar-width: 16rem;
  --reader-rail-width: min(18rem, 28vw);
  --reader-chrome-h: 2.75rem;
  min-height: calc(100vh - 8rem);
  display: flex;
  flex-direction: column;
}

.reader-chrome[data-reader-region="chrome"] {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  min-height: var(--reader-chrome-h);
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 92%, var(--text));
}

.reader-chrome-start {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
  flex: 1 1 auto;
}

.reader-chrome-start .reader-chrome-title {
  min-width: 0;
}

.reader-chrome-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: inherit;
  text-decoration: none;
}

a.reader-chrome-title:hover,
a.reader-chrome-title:focus-visible {
  text-decoration: underline;
}

/* Chrome <h1> wrapper: invisible semantically, inherits chrome text styling.
   Keeps the chrome bar compact while still giving each book page a real H1. */
.reader-chrome-h1 {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
  min-width: 0;
}

/* Inside the chrome H1, render everything as quiet washed-out context.
   The segment prefix (e.g. "Act 1 — Scenes 1 and 2 — ") is plain text;
   only the book title at the end is a link to the hub. The hub page's
   chrome title (no H1 wrapper) keeps its bolder default styling. */
.reader-chrome-h1 .reader-chrome-segment,
.reader-chrome-h1 .reader-chrome-sep,
.reader-chrome-h1 .reader-chrome-title {
  font-weight: 400;
  color: color-mix(in srgb, var(--text) 42%, transparent);
}

.reader-chrome-h1 a.reader-chrome-title:hover,
.reader-chrome-h1 a.reader-chrome-title:focus-visible {
  color: var(--text);
}

.reader-chrome-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

/* In-page header on book pages: small page-of-N meta on the left, zoom on the right.
   Sits just above the prose so the reading area still has a tools row, without
   pushing the actual text down with a big H1 (the H1 lives in the chrome). */
.reader-main .book-page > .book-page__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 0.75rem;
  flex-wrap: wrap;
  margin: 0.25rem 0 0.5rem;
}

.book-page__marker {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.reader-main .book-page > .book-page__header .reader-zoom {
  /* Inset slightly from the main column's right edge to align with reader-zoom optical edge. */
  margin-right: -0.52rem;
}

.reader-zoom {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
}

.reader-zoom-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 86%, var(--text));
  color: var(--text);
  border-radius: 0.55rem;
  cursor: pointer;
}

.reader-zoom-btn:hover {
  background: color-mix(in srgb, var(--bg) 78%, var(--text));
}

.reader-zoom-btn:active {
  transform: translateY(1px);
}

.reader-zoom-btn:disabled {
  cursor: default;
  opacity: 0.45;
  background: color-mix(in srgb, var(--bg) 92%, var(--text));
  border-color: color-mix(in srgb, var(--border) 82%, transparent);
}

.reader-zoom-btn:disabled .reader-zoom-icon {
  opacity: 0.7;
}

.reader-zoom-btn:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.reader-zoom-icon {
  display: block;
  width: 1.05rem;
  height: 1.05rem;
  object-fit: contain;
  filter: brightness(0) saturate(100%);
}

html[data-theme="dark"] .reader-zoom-icon {
  filter: brightness(0) saturate(100%) invert(1);
}

.reader-sidebar-toggle {
  display: none;
  align-items: center;
  gap: 0.3rem;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 86%, var(--text));
  color: var(--text);
  border-radius: 0.45rem;
  padding: 0.35rem 0.55rem;
  font: inherit;
  font-size: 0.85rem;
  line-height: 1.2;
  cursor: pointer;
}

.reader-sidebar-toggle-icon {
  display: block;
  width: 0.92rem;
  height: 0.92rem;
  object-fit: contain;
  transform: translateY(0.05rem);
  filter: brightness(0) saturate(100%);
}

html[data-theme="dark"] .reader-sidebar-toggle-icon {
  filter: brightness(0) saturate(100%) invert(1);
}

.reader-sidebar-backdrop {
  display: none;
}

.reader-sidebar-mobile-header {
  display: none;
}

.reader-chrome-assignment {
  color: var(--muted);
  font-style: italic;
}

.reader-body {
  flex: 1;
  display: grid;
  min-height: 0;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr);
  grid-auto-flow: row;
}

/* Book hub: single column, no sidebar/ad cells */
.reader-body--book-hub {
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
}

.reader-body--book-hub .reader-main[data-reader-region="main"] {
  grid-column: 1;
  grid-row: 1;
}

.reader-sidebar[data-reader-region="sidebar"] {
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 94%, var(--text));
}

.reader-sidebar-slot {
  flex: 1;
  min-height: 6rem;
  padding: 0.75rem;
  overflow: auto;
}

.reader-sidebar-placeholder {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.reader-main[data-reader-region="main"] {
  grid-column: 1;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  padding: 0.75rem 1rem 1rem;
  overflow: auto;
}

/* Hub: don’t stretch inner to full width — margin:auto can’t center a stretched flex item */
.reader-main--book-hub[data-reader-region="main"] {
  align-items: center;
}

.reader-text[data-reader-mount="text"] {
  flex: 1;
  min-height: 4rem;
}


/* Ad rail: hidden on small screens (no grid cell — display:none removes from layout) */
.reader-ad-rail {
  display: none;
}

.reader-ad {
  border: 1px dashed var(--border);
  border-radius: 0.375rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--muted);
}

/* Pre-launch: hide the placeholder visuals while preserving the layout
   slots. Remove (or override per-instance) once real ads are wired up. */
.reader-ad {
  visibility: hidden;
}

.reader-ad--desktop {
  display: none;
  padding: 1rem 0.75rem;
  min-height: 14rem;
}

.reader-ad--mobile {
  display: block;
  padding: 0.75rem 1rem;
  margin: 0;
  border-radius: 0;
  border-left: none;
  border-right: none;
  border-bottom: none;
}

.reader-main-inner {
  max-width: 42rem;
}

/* Reading pages: let the header row span the full main column; keep the prose measure on the body. */
.reader-main:not(.reader-main--book-hub) .reader-main-inner {
  max-width: none;
  width: 100%;
}

.reader-main:not(.reader-main--book-hub) .book-page .book-page-body {
  max-width: 42rem;
}


/* Book hub: capped width + centered in flex parent (see align-items on .reader-main--book-hub) */
.reader-main--book-hub .reader-main-inner {
  max-width: min(48rem, 100%);
  width: min(100%, 48rem);
  margin-inline: auto;
}

.reader-toc,
.reader-pick-list {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.9rem;
}

.reader-toc a,
.reader-pick-list a {
  text-decoration: none;
}

.reader-toc a[aria-current="page"] {
  font-weight: 700;
  color: var(--link);
}

.reader-toc a:hover,
.reader-pick-list a:hover {
  text-decoration: underline;
}

.reader-error {
  color: var(--muted);
  margin: 0;
}

@media (min-width: 768px) {
  .reader-body {
    grid-template-columns:
      var(--reader-sidebar-width) minmax(0, 1fr) var(--reader-rail-width);
    grid-template-rows: minmax(0, 1fr);
  }

  /* Hub must stay one full-width track; otherwise .reader-main stays in col 1 (= 16rem sidebar). */
  .reader-body--book-hub {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: minmax(0, 1fr);
  }

  .reader-sidebar[data-reader-region="sidebar"] {
    grid-column: 1;
    grid-row: 1;
    border-bottom: none;
    border-right: 1px solid var(--border);
  }


  .reader-main[data-reader-region="main"] {
    grid-column: 2;
    grid-row: 1;
  }

  .reader-ad-rail {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    grid-column: 3;
    grid-row: 1;
    min-height: 0;
    min-width: 0;
    padding: 0.75rem;
    border-left: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 96%, var(--text));
  }

  .reader-ad-rail .reader-ad--desktop {
    position: sticky;
    top: 0.75rem;
  }

  .reader-ad--mobile {
    display: none;
  }

  .reader-ad--desktop {
    display: block;
  }
}

.reader-word {
  display: inline;
  border-radius: 0.2rem;
  padding: 0.05rem 0.08rem;
  scroll-margin-top: 0.75rem;
  scroll-margin-bottom: calc(var(--reader-player-height, 8.25rem) + 0.5rem);
}

.reader-word.is-active-word {
  background: color-mix(in srgb, var(--link) 18%, transparent);
  outline: 1px solid color-mix(in srgb, var(--link) 35%, transparent);
}

html.reader-word-highlight-hidden .reader-word.is-active-word {
  background: transparent;
  outline: none;
}

@media (max-width: 767px) {
  .reader-sidebar-toggle {
    display: inline-flex;
  }

  .reader-body {
    grid-template-rows: minmax(0, 1fr);
  }

  .reader-main[data-reader-region="main"] {
    grid-row: 1;
  }

  .reader-sidebar[data-reader-region="sidebar"] {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1200;
    width: min(86vw, 20rem);
    max-width: 100%;
    min-height: 100dvh;
    border-right: 1px solid var(--border);
    border-bottom: none;
    /* Shadow is applied only when the drawer is open (see rule below); when
       closed it sits at translateX(-102%) and its shadow would otherwise leak
       onto the visible left edge of the screen as an unwanted glow. */
    transform: translateX(-102%);
    transition: transform 180ms ease, box-shadow 180ms ease;
  }

  .reader-sidebar-mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.7rem 0.75rem;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 90%, var(--text));
  }

  .reader-sidebar-mobile-title {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 700;
  }

  .reader-sidebar-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border: 1px solid var(--border);
    border-radius: 0.45rem;
    background: var(--bg);
    color: var(--text);
    font: inherit;
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
  }

.reader-sidebar-close-icon {
  display: block;
  width: 0.85rem;
  height: 0.85rem;
  object-fit: contain;
  filter: brightness(0) saturate(100%);
}

html[data-theme="dark"] .reader-sidebar-close-icon {
  filter: brightness(0) saturate(100%) invert(1);
}

  .reader-sidebar-close:hover {
    background: color-mix(in srgb, var(--text) 7%, transparent);
  }

  .reader-sidebar-close:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
  }

  .reader-app.reader-mobile-sidebar-open .reader-sidebar[data-reader-region="sidebar"] {
    transform: translateX(0);
    box-shadow: 0 10px 32px color-mix(in srgb, var(--text) 22%, transparent);
  }

  .reader-sidebar-slot {
    padding: 0.9rem 0.75rem;
  }

  .reader-sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1150;
    border: 0;
    padding: 0;
    margin: 0;
    background: rgba(0, 0, 0, 0.34);
    cursor: pointer;
  }

  .reader-app.reader-mobile-sidebar-open .reader-sidebar-backdrop {
    display: block;
  }
}

html.reader-mobile-sidebar-lock,
html.reader-mobile-sidebar-lock body {
  overflow: hidden;
}