/* ══════════════════════════════════════
   Bible Reader — Apple Books-inspired
   ══════════════════════════════════════ */

body.bible-body {
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
}

/* The Bible reader runs full-bleed — global nav is replaced by the menu button
   in the reader toolbar, and the reader has its own globe language toggle, so
   the standalone nav language button is hidden too. */
body.bible-body .glass-nav,
body.bible-body .nav-lang { display: none !important; }

.reader-root {
  --reader-bg: #1a1a1d;
  --reader-text: rgba(255, 255, 255, 0.92);
  --reader-muted: rgba(255, 255, 255, 0.4);
  --reader-faint: rgba(255, 255, 255, 0.06);
  --reader-accent: rgba(110, 155, 255, 0.85);
  --reader-toolbar-bg: rgba(28, 28, 30, 0.78);

  /* Liquid-glass material — frosted fill, bright specular rim, soft lift.
     Tuned for dark themes; the light-theme group below overrides it. */
  --glass-fill: rgba(255, 255, 255, 0.10);
  --glass-fill-strong: rgba(255, 255, 255, 0.16);
  --glass-edge: rgba(255, 255, 255, 0.22);
  --glass-sheen: rgba(255, 255, 255, 0.38);
  --glass-lift: 0 1px 3px rgba(0, 0, 0, 0.16), 0 2px 6px rgba(0, 0, 0, 0.08);
  --reader-font-body: "Lora", "Cormorant Garamond", "Georgia", "Times New Roman", serif;
  --reader-font-display: "Outfit", -apple-system, BlinkMacSystemFont, sans-serif;
  --reader-font-weight: 400;
  --reader-line-height: 1.65;
  --reader-letter-spacing: 0.005em;
  --reader-font-size: 1.05rem;
  --page-margin: clamp(28px, 5vw, 80px);
  --page-gap: clamp(28px, 4vw, 64px);
  --toolbar-h: 56px;
  --footer-h: 36px;

  position: fixed;
  inset: 0;
  background: var(--reader-bg);
  color: var(--reader-text);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Themes ── */
.reader-root.theme-light {
  --reader-bg: #fafafa;
  --reader-text: rgba(20, 20, 22, 0.92);
  --reader-muted: rgba(20, 20, 22, 0.5);
  --reader-faint: rgba(20, 20, 22, 0.08);
  --reader-toolbar-bg: rgba(245, 245, 246, 0.85);
  --reader-accent: rgba(60, 110, 230, 0.9);
}
.reader-root.theme-quiet {
  --reader-bg: #1a1a1d;
  --reader-text: rgba(232, 232, 234, 0.94);
  --reader-muted: rgba(232, 232, 234, 0.45);
  --reader-faint: rgba(255, 255, 255, 0.07);
  --reader-toolbar-bg: rgba(28, 28, 30, 0.78);
  --reader-accent: rgba(120, 165, 255, 0.92);
}
.reader-root.theme-paper {
  --reader-bg: #f3efe7;
  --reader-text: rgba(35, 28, 20, 0.92);
  --reader-muted: rgba(35, 28, 20, 0.5);
  --reader-faint: rgba(35, 28, 20, 0.08);
  --reader-toolbar-bg: rgba(238, 232, 220, 0.85);
  --reader-accent: rgba(120, 80, 30, 0.85);
}
.reader-root.theme-bold {
  --reader-bg: #ffffff;
  --reader-text: rgba(10, 10, 12, 0.95);
  --reader-muted: rgba(10, 10, 12, 0.55);
  --reader-faint: rgba(10, 10, 12, 0.1);
  --reader-toolbar-bg: rgba(248, 248, 250, 0.88);
  --reader-accent: rgba(10, 10, 12, 0.95);
  --reader-font-weight: 600;
  --reader-font-body: "Outfit", -apple-system, sans-serif;
}
.reader-root.theme-calm {
  --reader-bg: #e9d9b7;
  --reader-text: rgba(45, 30, 15, 0.92);
  --reader-muted: rgba(45, 30, 15, 0.5);
  --reader-faint: rgba(45, 30, 15, 0.08);
  --reader-toolbar-bg: rgba(232, 215, 178, 0.85);
  --reader-accent: rgba(120, 70, 20, 0.9);
}
.reader-root.theme-focus {
  --reader-bg: #fff8e7;
  --reader-text: rgba(45, 30, 8, 0.92);
  --reader-muted: rgba(45, 30, 8, 0.5);
  --reader-faint: rgba(45, 30, 8, 0.08);
  --reader-toolbar-bg: rgba(255, 248, 228, 0.85);
  --reader-accent: rgba(180, 120, 30, 0.9);
}

/* Light themes need a brighter frosted fill so the glass pills read against a
   pale page, and a softer shadow so they don't look heavy. */
.reader-root.theme-light,
.reader-root.theme-paper,
.reader-root.theme-bold,
.reader-root.theme-calm,
.reader-root.theme-focus {
  --glass-fill: rgba(255, 255, 255, 0.45);
  --glass-fill-strong: rgba(255, 255, 255, 0.65);
  --glass-edge: rgba(255, 255, 255, 0.6);
  --glass-sheen: rgba(255, 255, 255, 0.55);
  --glass-lift: 0 0.5px 1px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.03);
}

/* Sizes (data-size on root) */
.reader-root[data-size="xs"] { --reader-font-size: 0.92rem; --reader-line-height: 1.55; }
.reader-root[data-size="s"]  { --reader-font-size: 0.98rem; --reader-line-height: 1.6; }
.reader-root[data-size="m"]  { --reader-font-size: 1.06rem; --reader-line-height: 1.65; }
.reader-root[data-size="l"]  { --reader-font-size: 1.18rem; --reader-line-height: 1.7; }
.reader-root[data-size="xl"] { --reader-font-size: 1.32rem; --reader-line-height: 1.75; }

/* ── Toolbar ── */
.reader-toolbar {
  position: relative;
  z-index: 30;
  height: var(--toolbar-h);
  padding: 0 clamp(8px, 2vw, 20px);
  padding-top: var(--safe-top);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
}

/* Only the button clusters fade while reading — the centered chapter title
   stays put so the reader always knows where they are. */
.rt-left, .rt-right {
  display: flex;
  align-items: center;
  gap: 6px;
  transition:
    opacity var(--dur-med) var(--ease-out-soft),
    transform var(--dur-med) var(--ease-out-soft);
}

.reader-root[data-controls-hidden="true"] .rt-left,
.reader-root[data-controls-hidden="true"] .rt-right {
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
}

.reader-title {
  /* Absolutely centered in the toolbar so it stays in the middle regardless
     of how many buttons each side has. */
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  max-width: 60%;
  font-family: var(--reader-font-display);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--reader-text);
  margin: 0;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-transform: none;
  text-shadow: none;
  /* Roomy line-height + matching vertical padding so descenders (g, ă, đ)
     aren't clipped by overflow:hidden. */
  line-height: 1.4;
  padding: 0.15em 0;
  pointer-events: none;
}

.rt-btn {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-fill);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border: 0.5px solid var(--glass-edge);
  border-radius: 50%;
  color: var(--reader-text);
  text-decoration: none;
  cursor: pointer;
  /* Specular rim on top, frosted body, soft lift below — the liquid-glass
     read. The inset highlight catches "light" along the upper edge. */
  box-shadow:
    var(--glass-lift),
    inset 0 0.5px 0.5px var(--glass-sheen);
  transition:
    background var(--dur-fast) var(--ease-out-soft),
    border-color var(--dur-fast) var(--ease-out-soft),
    box-shadow var(--dur-fast) var(--ease-out-soft),
    transform var(--dur-fast) var(--ease-out-soft);
}

.rt-btn:hover {
  background: var(--glass-fill-strong);
  box-shadow:
    var(--glass-lift),
    inset 0 1px 0.5px var(--glass-sheen),
    inset 0 -6px 14px -8px var(--glass-sheen);
}

.rt-btn:active { transform: scale(0.95); }

.rt-btn[aria-expanded="true"],
.rt-btn[aria-pressed="true"] {
  background: var(--glass-fill-strong);
  color: var(--reader-accent);
}

.rt-aa {
  font-family: var(--reader-font-display);
  font-weight: 500;
  gap: 1px;
  width: 38px;
}
.rt-aa .rt-aa-small { font-size: 0.78rem; letter-spacing: -0.02em; }
.rt-aa .rt-aa-large { font-size: 1.05rem; letter-spacing: -0.02em; }

/* ── Stage ── */
.reader-stage {
  position: relative;
  flex: 1;
  display: flex;
  outline: none;
  min-height: 0;
}

.reader-window {
  position: relative;
  flex: 1;
  padding: clamp(24px, 4vh, 56px) var(--page-margin);
  min-height: 0;
  /* overflow:hidden is on .reader-clip instead so the clip happens at the
     content-box edge (page edge), not at the padding-box edge — otherwise
     the next page's first column would peek through the right padding. */
}

.reader-clip {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* Paged reader: contentEl is absolutely positioned with width:auto so the
   multi-column box can grow horizontally as new columns are created.
   Each column is exactly clip-width wide → one visible "page" per column.
   Navigation translates contentEl left/right between pages. */
.reader-content {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  padding: clamp(8px, 2vh, 20px) 0;
  box-sizing: border-box;
  column-gap: 0;
  column-fill: auto;
  font-family: var(--reader-font-body);
  font-size: var(--reader-font-size);
  font-weight: var(--reader-font-weight);
  line-height: var(--reader-line-height);
  letter-spacing: var(--reader-letter-spacing);
  color: var(--reader-text);
  transform: translate3d(0, 0, 0);
  /* Page transitions are an opacity flip, not a slide — the new page
     "appears" instead of sliding in, like turning a paper page. */
  transition: none;
}

@keyframes page-flip {
  0%   { opacity: 0; filter: brightness(0.96); }
  60%  { opacity: 0.85; filter: brightness(0.99); }
  100% { opacity: 1; filter: brightness(1); }
}

.reader-content.page-flipping {
  animation: page-flip 280ms ease-out;
}

@media (prefers-reduced-motion: reduce) {
  .reader-content.page-flipping { animation: none; }
}

/* ── 3D book-leaf page flip ──────────────────────────────────────────────
   A leaf pinned at the left spine rotates around the Y axis to turn the page.
   The layer is clipped by .reader-clip, so the turned leaf disappears off the
   left edge as it passes vertical. */
.flip-layer {
  position: absolute;
  inset: 0;
  z-index: 5;
  perspective: 2000px;
  pointer-events: none;
}

.flip-leaf {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: left center;
  transform-style: preserve-3d;
  will-change: transform;
}

.flip-face {
  position: absolute;
  top: 0;
  left: 0;
  overflow: hidden;
  background: var(--reader-bg);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* Back of the paper: page colour with a faint gradient toward the spine and a
   soft shadow at the binding edge so the turned side reads as a real sheet. */
.flip-face-back {
  transform: rotateY(180deg);
  background:
    linear-gradient(to left, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0) 30%),
    var(--reader-bg);
  box-shadow: inset 2px 0 8px -4px rgba(0, 0, 0, 0.25);
}

/* Darkening wash on the front face as the leaf lifts — the page falls into
   shadow as it turns away from the reader. */
.flip-shade {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(0, 0, 0, 0.32) 0%, rgba(0, 0, 0, 0.08) 60%);
  opacity: 0;
}

/* Each block-level child sits in a centered narrow column inside its visible
   page, with horizontal padding so text doesn't touch the page edges. */
.reader-content .chapter-subhead,
.reader-content .chapter-heading,
.reader-content .bible-verse {
  box-sizing: border-box;
  padding-left: clamp(6px, 2vw, 16px);
  padding-right: clamp(6px, 2vw, 16px);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

/* Only the chapter header pair stays together. Verses are allowed to break
   across pages so columns fill instead of leaving a half-empty bottom. */
.reader-content .chapter-subhead,
.reader-content .chapter-heading {
  break-inside: avoid;
  break-after: avoid;
}

.reader-content .bible-verse {
  break-inside: auto;
  orphans: 2;
  widows: 2;
}

.reader-content h2.chapter-heading {
  font-family: var(--reader-font-display);
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--reader-text);
  text-align: left;
  margin: 0 0 0.35em;
  line-height: 1.15;
  break-after: avoid;
}

.reader-content .chapter-subhead {
  font-family: var(--reader-font-display);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--reader-muted);
  display: block;
  margin-bottom: 0.55em;
  font-weight: 500;
}

.reader-content p.bible-verse {
  margin: 0 0 0.35em;
  text-align: justify;
  hyphens: auto;
  text-indent: 0;
}

.reader-content .verse-num {
  display: inline-block;
  min-width: 1.5em;
  margin-right: 0.25em;
  color: var(--reader-muted);
  font-family: var(--reader-font-display);
  font-size: 0.62em;
  font-weight: 500;
  letter-spacing: 0.04em;
  vertical-align: 0.5em;
  font-variant-numeric: tabular-nums;
}

.reader-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 200px;
  padding: 0;
}

.reader-spinner {
  width: 32px;
  height: 32px;
  border: 2.5px solid var(--reader-faint);
  border-top-color: var(--reader-muted);
  border-radius: 50%;
  animation: reader-spin 0.85s linear infinite;
  will-change: transform;
}

@keyframes reader-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .reader-spinner { animation-duration: 2.4s; }
}

.reader-error {
  padding: 80px var(--page-margin);
  text-align: center;
  color: var(--reader-muted);
  font-family: var(--reader-font-display);
  font-weight: 300;
  font-size: 0.95rem;
}


/* ── Edge nav (desktop click zones + chevrons) ── */
.page-edge {
  position: relative;
  width: clamp(40px, 7vw, 80px);
  flex: 0 0 auto;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--reader-muted);
  transition:
    background var(--dur-med) var(--ease-out-soft),
    color var(--dur-fast) var(--ease-out-soft),
    opacity var(--dur-med) var(--ease-out-soft);
  z-index: 5;
}

.page-edge:disabled {
  opacity: 0.25;
  cursor: default;
}

.page-edge:not(:disabled):hover {
  color: var(--reader-text);
}

/* Desktop: the arrows hide while reading (like the toolbar icons) and reveal
   on mouse movement over the page via [data-edges="show"]. Disabled edges stay
   hidden so no dead arrow lingers at the first/last page. */
@media (hover: hover) and (min-width: 769px) {
  .page-edge {
    opacity: 0;
    pointer-events: none;
  }
  .reader-root[data-edges="show"] .page-edge:not(:disabled) {
    opacity: 1;
    pointer-events: auto;
  }
}

.page-edge .page-chev {
  position: absolute;
  top: 50%;
  width: 14px;
  height: 14px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  opacity: 0.7;
  transition: transform var(--dur-fast) var(--ease-out-soft), opacity var(--dur-fast) var(--ease-out-soft);
}
.page-edge-prev .page-chev {
  left: 50%;
  transform: translate(-30%, -50%) rotate(135deg);
}
.page-edge-next .page-chev {
  left: 50%;
  transform: translate(-70%, -50%) rotate(-45deg);
}
.page-edge:not(:disabled):hover .page-chev { opacity: 1; }
.page-edge-prev:not(:disabled):hover .page-chev { transform: translate(-50%, -50%) rotate(135deg); }
.page-edge-next:not(:disabled):hover .page-chev { transform: translate(-50%, -50%) rotate(-45deg); }

/* ── TOC drawer ── */
.toc-scrim {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-out-soft);
  z-index: 50;
  backdrop-filter: blur(2px);
}
.toc-scrim.show { opacity: 1; }
.toc-scrim[hidden] { display: none; }

.toc-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(380px, 88vw);
  background: var(--reader-bg);
  border-right: 0.5px solid var(--reader-faint);
  box-shadow: 12px 0 60px rgba(0, 0, 0, 0.25);
  transform: translateX(-100%);
  transition: transform var(--dur-med) var(--ease-out-soft);
  z-index: 51;
  display: flex;
  flex-direction: column;
  padding-top: var(--safe-top);
}
.toc-drawer.open { transform: translateX(0); }
.toc-drawer[hidden] { display: none; }

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 18px 12px;
  border-bottom: 0.5px solid var(--reader-faint);
}
.toc-title {
  font-family: var(--reader-font-display);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--reader-text);
}
.toc-close {
  background: transparent;
  border: 0.5px solid transparent;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--reader-text);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out-soft);
}
.toc-close:hover { background: var(--reader-faint); }

.toc-versions { padding: 14px 18px; border-bottom: 0.5px solid var(--reader-faint); }
.toc-version-select {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  padding: 9px 30px 9px 12px;
  background: var(--reader-faint);
  border: 0.5px solid var(--reader-faint);
  border-radius: 10px;
  color: var(--reader-text);
  font-family: var(--reader-font-display);
  font-size: 0.9rem;
  cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%),
                    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 10px) 50%;
  background-size: 6px 6px;
  background-repeat: no-repeat;
}
.toc-version-select option {
  background: var(--reader-bg);
  color: var(--reader-text);
}

.toc-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 6px 18px;
  -webkit-overflow-scrolling: touch;
}

.toc-testament {
  font-family: var(--reader-font-display);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--reader-muted);
  padding: 14px 14px 6px;
  font-weight: 500;
}

.toc-book {
  font-family: var(--reader-font-display);
}
.toc-book-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: 0;
  padding: 10px 14px;
  color: var(--reader-text);
  font-size: 0.95rem;
  font-weight: 400;
  text-align: left;
  cursor: pointer;
  border-radius: 8px;
  transition: background var(--dur-fast) var(--ease-out-soft);
}
.toc-book-btn:hover { background: var(--reader-faint); }
.toc-book-btn[aria-expanded="true"] .toc-book-caret { transform: rotate(90deg); }
.toc-book-caret {
  width: 6px;
  height: 6px;
  border-top: 2px solid var(--reader-muted);
  border-right: 2px solid var(--reader-muted);
  transform: rotate(45deg);
  transition: transform var(--dur-fast) var(--ease-out-soft);
  margin-left: 8px;
}
.toc-book-name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.toc-chapters {
  display: none;
  padding: 6px 12px 12px 12px;
}
.toc-book[aria-expanded="true"] .toc-chapters {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
  gap: 4px;
}
.toc-chapter {
  appearance: none;
  background: transparent;
  border: 0.5px solid transparent;
  color: var(--reader-text);
  padding: 8px 0;
  text-align: center;
  font-family: var(--reader-font-display);
  font-size: 0.84rem;
  font-variant-numeric: tabular-nums;
  border-radius: 6px;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out-soft);
}
.toc-chapter:hover { background: var(--reader-faint); }
.toc-chapter.is-current {
  background: var(--reader-accent);
  color: #fff;
  font-weight: 500;
}

/* ── Settings popover ── */
.settings-popover {
  position: fixed;
  top: calc(var(--toolbar-h) + var(--safe-top) + 8px);
  right: clamp(8px, 3vw, 24px);
  width: min(360px, calc(100vw - 24px));
  padding: 18px 18px 22px;
  background: var(--reader-toolbar-bg);
  backdrop-filter: blur(40px) saturate(200%);
  -webkit-backdrop-filter: blur(40px) saturate(200%);
  border: 0.5px solid var(--reader-faint);
  border-radius: 18px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25);
  z-index: 60;
  transform-origin: top right;
  animation: sp-pop var(--dur-med) var(--ease-spring);
}
.settings-popover[hidden] { display: none; }

@keyframes sp-pop {
  from { opacity: 0; transform: translateY(-8px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.sp-arrow {
  position: absolute;
  top: -7px;
  right: 78px;
  width: 14px;
  height: 14px;
  background: var(--reader-toolbar-bg);
  border-left: 0.5px solid var(--reader-faint);
  border-top: 0.5px solid var(--reader-faint);
  transform: rotate(45deg);
}

.sp-title {
  font-family: var(--reader-font-display);
  font-size: 0.84rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--reader-text);
  text-align: center;
  margin: 0 0 14px;
}

.sp-row-size {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-bottom: 14px;
  border: 0.5px solid var(--reader-faint);
  border-radius: 999px;
  overflow: hidden;
  background: var(--reader-faint);
}
.sp-size {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--reader-text);
  font-family: var(--reader-font-display);
  padding: 11px 0;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-out-soft);
}
.sp-size:hover { background: rgba(255, 255, 255, 0.08); }
.theme-light .sp-size:hover, .theme-paper .sp-size:hover,
.theme-bold .sp-size:hover, .theme-calm .sp-size:hover, .theme-focus .sp-size:hover {
  background: rgba(0, 0, 0, 0.05);
}
.sp-size-dec { font-size: 0.86rem; border-right: 0.5px solid var(--reader-faint); }
.sp-size-inc { font-size: 1.18rem; }

.sp-themes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.sp-theme {
  appearance: none;
  background: #fff;
  border: 1.5px solid transparent;
  border-radius: 14px;
  padding: 14px 8px 10px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition:
    transform var(--dur-fast) var(--ease-out-soft),
    border-color var(--dur-fast) var(--ease-out-soft),
    box-shadow var(--dur-fast) var(--ease-out-soft);
}
.sp-theme:hover { transform: translateY(-1px); }
.sp-theme.is-active {
  border-color: var(--reader-accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}
.sp-theme[data-theme="light"] { background: #ffffff; color: #1a1a1d; }
.sp-theme[data-theme="quiet"] { background: #2a2a2d; color: #e8e8ea; }
.sp-theme[data-theme="paper"] { background: #f3efe7; color: #231c14; }
.sp-theme[data-theme="bold"]  { background: #ffffff; color: #0a0a0c; }
.sp-theme[data-theme="bold"] .sp-theme-aa { font-weight: 700; }
.sp-theme[data-theme="calm"]  { background: #e9d9b7; color: #2d1e0f; }
.sp-theme[data-theme="focus"] { background: #fff8e7; color: #2d1e08; }

.sp-theme-aa {
  font-family: "Lora", Georgia, serif;
  font-size: 1.6rem;
  line-height: 1;
  font-weight: 500;
}
.sp-theme[data-theme="bold"] .sp-theme-aa { font-family: var(--reader-font-display); }
.sp-theme-label {
  font-family: var(--reader-font-display);
  font-size: 0.74rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  margin-top: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .reader-content { transition: none !important; }
}

/* ── Floating mobile controls (TOC bottom-left, Aa bottom-right) ── */
.rt-floating {
  display: none;
  position: fixed;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 16px);
  z-index: 35;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: var(--glass-fill);
  backdrop-filter: blur(40px) saturate(200%);
  -webkit-backdrop-filter: blur(40px) saturate(200%);
  border: 0.5px solid var(--glass-edge);
  border-radius: 22px;
  color: var(--reader-text);
  cursor: pointer;
  box-shadow:
    var(--glass-lift),
    inset 0 0.5px 0.5px var(--glass-sheen);
  transition: opacity var(--dur-med) var(--ease-out-soft);
}
.rt-floating-settings { right: 16px; }
.rt-floating-toc      { right: 68px; }

.rt-floating .rt-aa-small,
.rt-floating .rt-aa-large {
  display: inline-block;
  font-family: var(--reader-font-display);
  line-height: 1;
}
.rt-floating .rt-aa-small { font-size: 0.78rem; }
.rt-floating .rt-aa-large { font-size: 1.05rem; margin-left: 1px; }

.reader-root[data-controls-hidden="true"] .rt-floating {
  opacity: 0;
  pointer-events: none;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .reader-root {
    --page-margin: clamp(18px, 5vw, 28px);
    --toolbar-h: 52px;
  }
  .reader-title { font-size: 0.86rem; }
  .reader-toolbar {
    padding: 0 16px;
    padding-top: var(--safe-top);
  }
  .rt-left, .rt-right { gap: 0; }
  .rt-btn { width: 34px; height: 34px; }
  .rt-aa  { width: 38px; }
  .page-edge { width: 28px; }
  .page-edge .page-chev { display: none; }
  .reader-footer { font-size: 0.7rem; }
  .sp-themes { gap: 6px; }
  .sp-theme { padding: 12px 6px 8px; border-radius: 12px; }
  .sp-theme-aa { font-size: 1.4rem; }

  /* TOC moves to a bottom-left floating button; Aa moves to a bottom-right
     floating button. Globe and exit stay top-right in the toolbar. */
  .rt-left { display: none; }
  #settingsBtn { display: none; }
  .rt-right {
    margin-left: auto;
    gap: 8px;
  }
  .rt-right .rt-btn {
    width: 44px;
    height: 44px;
    backdrop-filter: blur(40px) saturate(200%);
    -webkit-backdrop-filter: blur(40px) saturate(200%);
    border-radius: 22px;
  }
  .rt-floating { display: inline-flex; }

  /* Re-anchor the settings popover above the bottom-right cluster. */
  .settings-popover {
    top: auto;
    bottom: calc(env(safe-area-inset-bottom, 0px) + 70px);
    right: 16px;
    transform-origin: bottom right;
  }
  .settings-popover .sp-arrow { display: none; }
}