/* ══════════════════════════════════════════════════════════════
   Litheca book-page design system — SINGLE SOURCE OF TRUTH for
   everything a book guide looks like: sidebar (cover/title/badges/
   CTAs/awards), main-content cards, chapters/characters, the similar-
   books marquee, shelf bar, reading-time planner, and section nav.

   Loaded by BOTH:
     - summary.html          (the interactive tool, JS-rendered)
     - _layouts/book.html    (the published static page, Jekyll-rendered)

   Change a color/spacing/style HERE and it updates both pages on the
   next load — no more hand-syncing two copies (that drift is exactly
   what caused the static page to look visibly different from the
   dynamic one). Interactive-only chrome that has no static equivalent
   (search box, floating chat, quiz) stays local to summary.html's own
   <style> block — see the comment there for the list and why.
   ══════════════════════════════════════════════════════════════ */

/* ── Reading-time planner (styled like the audio bar) ─────── */
.reading-bar {
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.8rem 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
    flex-wrap: wrap;
  }
.reading-bar-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.reading-bar-icon {
    width: 36px; height: 36px; border-radius: 50%;
    border: 1px solid var(--border); background: var(--bg); color: var(--accent);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  }
.reading-bar-total { font-size: 12px; font-weight: 600; color: var(--fg); display: block; }
.reading-bar-sub { font-size: 10px; color: var(--fg-faint); }
.reading-bar-control { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 220px; justify-content: flex-end; }
.reading-pace-label { font-size: 11px; color: var(--fg-faint); white-space: nowrap; }
.reading-pace-value { font-size: 12px; font-weight: 700; color: var(--fg); white-space: nowrap; min-width: 70px; text-align: right; }
.reading-result {
    font-size: 12px; font-weight: 700; color: var(--accent);
    background: var(--bg); border: 1px solid var(--border); border-radius: 20px;
    padding: 5px 12px; white-space: nowrap; flex-shrink: 0;
  }
.reading-slider {
    -webkit-appearance: none; appearance: none;
    flex: 1; min-width: 90px; max-width: 200px; height: 6px; border-radius: 99px;
    background: var(--border); outline: none; cursor: pointer;
  }
.reading-slider::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--accent); border: 2px solid var(--bg); cursor: pointer;
    box-shadow: 0 1px 3px rgba(0,0,0,0.25);
  }
.reading-slider::-moz-range-thumb {
    width: 18px; height: 18px; border-radius: 50%;
    background: var(--accent); border: 2px solid var(--bg); cursor: pointer;
  }
@media (max-width: 560px) {
  /* The control's desktop `flex:1` forces flex-basis:0, so `width:100%`
     is ignored and the control gets squeezed to a sliver beside the
     "Reading time" block — then its nowrap "Finish in N days" badge spills
     ~11px past the viewport and drags the whole page sideways. Force the
     control onto its own full row with flex-basis, and give the badge its
     own line within it. */
  .reading-bar .reading-bar-control { justify-content: flex-start; flex: 1 1 100%; flex-wrap: wrap; min-width: 0; }
  .reading-bar .reading-result { flex-basis: 100%; text-align: center; margin-top: 4px; }
}

/* ── Sidebar + Main Layout ─────────────────────────────────── */
.summary-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
  }
/* Main content first in DOM for SEO; sidebar visually on left via order */
.summary-main {
    flex: 1;
    min-width: 0;
    order: 2;
  }
.summary-sidebar {
    width: 260px;
    flex-shrink: 0;
    position: sticky;
    top: 80px;
    order: 1;
  }
.sidebar-cover {
    width: 100%;
    height: auto;
    max-height: 340px;
    object-fit: contain;
    border-radius: 10px;
    border: 1px solid var(--border);
    display: block;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  }
.sidebar-no-cover {
    width: 100%;
    height: 200px;
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--fg-faint);
    font-size: 13px;
  }
.sidebar-title {
    font-size: 17px;
    font-weight: 800;
    line-height: 1.25;
    margin: 1rem 0 0.25rem;
    color: var(--fg);
  }
.sidebar-author {
    font-size: 13px;
    color: var(--fg-faint);
    margin: 0 0 0.75rem;
  }
.sidebar-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 1rem;
  }
.sidebar-badge {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--bg-subtle);
    color: var(--fg);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
  }
.sidebar-badge.category {
    background: var(--accent-bg);
    border-color: rgba(255,91,79,0.2);
    color: var(--accent);
  }
.sidebar-badge.rating {
    background: rgba(245,158,11,0.08);
    border-color: rgba(245,158,11,0.2);
    color: #f59e0b;
  }
.sidebar-section-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--fg-faint);
    margin: 1.25rem 0 0.6rem;
  }
.sidebar-awards-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }
.sidebar-award-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-subtle, rgba(255,255,255,0.06));
    font-size: 12px;
    transition: all 0.2s ease;
  }
.sidebar-award-item:last-child { border-bottom: none; }
.sidebar-award-logo-wrap {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  }
.sidebar-award-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
  }
.sidebar-award-logo-fallback {
    font-size: 11px;
    color: #f59e0b;
    line-height: 1;
  }
.sidebar-award-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1px;
  }
.sidebar-award-name {
    color: var(--fg);
    font-weight: 500;
    line-height: 1.3;
  }
.sidebar-award-year {
    color: var(--fg-faint);
    font-size: 10px;
  }
.sidebar-show-all {
    font-size: 11px;
    color: var(--accent);
    cursor: pointer;
    margin-top: 8px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    padding: 0;
    font-weight: 600;
    transition: color 0.2s ease;
    text-decoration: none;
  }
.sidebar-show-all:hover {
    color: var(--accent-hover);
    text-decoration: underline;
  }
.sidebar-amazon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px;
    background: #ff9900;
    color: #111 !important;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    text-decoration: none;
    margin-top: 1.25rem;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(255,153,0,0.3);
  }
.sidebar-amazon-btn:hover {
    background: #e68a00;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(255,153,0,0.4);
  }
.sidebar-review-links {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
.sidebar-ext-link {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--fg-faint);
    text-decoration: none;
    padding: 5px 8px;
    border-radius: 6px;
    border: 1px solid var(--border);
    transition: all 0.15s ease;
  }
.sidebar-ext-link:hover {
    color: var(--fg);
    border-color: var(--fg-faint);
    background: var(--bg-subtle);
  }
/* ── Summary Main Content ─────────────────────────────────── */
.summary-card {
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.02);
  }
.summary-card-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--fg);
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
  }
.ai-output { font-size: 15px; line-height: 1.75; color: var(--fg); }
.ai-output h2 {
    font-size: 17px;
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
    border-bottom: 1px solid var(--border);
    padding-bottom: 6px;
  }
.ai-output h2:first-of-type { margin-top: 0; }
.ai-output h3 {
    font-size: 14px;
    font-weight: 600;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
    opacity: 0.85;
  }
.ai-output p { margin-bottom: 1.25rem; }
.ai-output p:last-child { margin-bottom: 0; }
.ai-output ul { margin-bottom: 1.25rem; padding-left: 1.25rem; }
.ai-output li { margin-bottom: 0.5rem; line-height: 1.65; }
/* Meta badges (inside main content) */
.meta-badge {
    font-size: 12px;
    color: var(--fg);
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 4px 12px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
  }
.meta-badge.category { background: var(--accent-bg); border-color: rgba(255,91,79,0.2); color: var(--accent); }
.meta-badge.rating { background: rgba(245,158,11,0.08); border-color: rgba(245,158,11,0.2); color: #f59e0b; }
/* Wrapper for cover + title/author/badges: plain blocks on desktop,
   a compact side-by-side header on mobile. */
.sidebar-top-info { min-width: 0; }
/* ── Mobile Responsive ────────────────────────────────────── */
@media (max-width: 900px) {
  .summary-layout { flex-direction: column; gap: 1.5rem; }
  /* Everything must fit the viewport — no element may widen the column
     (the old 140px+1fr sidebar grid did exactly that and dragged the
     whole page into horizontal overflow). */
  .summary-layout > * { max-width: 100%; }
  .summary-main, .summary-sidebar { width: 100%; box-sizing: border-box; }
  .summary-sidebar {
      position: static;
      max-height: none;
      order: 1;
      background: var(--bg-subtle);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 1rem;
    }
  /* Compact header: cover beside title/author/badges; every block
     after it (CTAs, NYT, themes, awards…) stacks full-width below. */
  .sidebar-top { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 14px; }
  .sidebar-cover-wrap { width: 108px; flex-shrink: 0; }
  .sidebar-cover { max-height: 170px; }
  .sidebar-no-cover { height: 140px; }
  .sidebar-title { font-size: 15px; margin-top: 0; }
  .sidebar-badges { flex-wrap: wrap; }
  .sidebar-badge { white-space: normal; }  /* long badges wrap, never widen */
  .sidebar-amazon-btn { margin-top: 0.5rem; width: 100%; justify-content: center; box-sizing: border-box; }
  .sidebar-review-links { flex-direction: row; flex-wrap: wrap; margin-top: 0.5rem; }
}

@media (max-width: 480px) {
  .summary-card { padding: 1rem; }
  .sidebar-cover-wrap { width: 92px; }
  .sidebar-cover { max-height: 140px; }
}

/* ── Similar books: infinite horizontal marquee ────────────── */
.similar-marquee { overflow: hidden; position: relative; padding: 14px 0; }
.similar-track {
    display: flex;
    width: max-content;
    animation: similar-scroll 60s linear infinite;
  }
@keyframes similar-scroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
  }
/* Pause while the reader inspects/clicks a cover */
.similar-marquee:hover .similar-track { animation-play-state: paused; }
/* Manual nudge arrows — appear on hover (always visible on touch, where
   the marquee is scrollable anyway). First use freezes the auto-marquee. */
.similar-nav {
    position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
    width: 34px; height: 34px; border-radius: 50%;
    border: 1px solid var(--border); background: var(--bg); color: var(--fg);
    cursor: pointer; font-size: 20px; line-height: 1;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 2px 10px rgba(0,0,0,.15);
    opacity: 0; transition: opacity .15s;
  }
.similar-marquee:hover .similar-nav { opacity: 1; }
.similar-nav.prev { left: 6px; }
.similar-nav.next { right: 6px; }
.similar-item {
    width: 118px;
    flex-shrink: 0;
    margin-right: 16px; /* margin, not flex gap — keeps -50% loop seamless */
    text-align: center;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform .25s ease, opacity .25s ease;
  }
/* Hovered cover grows; its siblings recede */
.similar-track:hover .similar-item { transform: scale(.92); opacity: .55; }
.similar-track .similar-item:hover { transform: scale(1.12); opacity: 1; position: relative; z-index: 2; }
.similar-item img,
.similar-item .similar-cover-empty {
    width: 100%;
    aspect-ratio: 2/3;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin-bottom: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,.08);
    transition: box-shadow .25s ease;
  }
.similar-item:hover img { box-shadow: 0 10px 24px rgba(0,0,0,.25); }
.similar-item .similar-cover-empty {
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-subtle); color: var(--fg-faint);
    font-size: 11px; padding: 8px; box-sizing: border-box; text-align: center;
  }
.similar-item .similar-t {
    font-size: 11px; font-weight: 600; line-height: 1.3; color: var(--fg);
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden; height: 29px; margin-bottom: 2px;
  }
.similar-item .similar-a {
    font-size: 10px; color: var(--fg-faint);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  }
@media (prefers-reduced-motion: reduce) {
  .similar-track { animation: none; }
  .similar-marquee { overflow-x: auto; }
}

/* ── Shelf bar: reading status + rating (main content) ─────── */
.shelf-bar {
    background: var(--bg-subtle); border: 1px solid var(--border); border-radius: 12px;
    padding: 0.8rem 1.25rem; margin-bottom: 1.5rem;
    display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; flex-wrap: wrap;
  }
.shelf-label { font-size: 12px; font-weight: 600; color: var(--fg); display: flex; align-items: center; gap: 8px; }
.shelf-status { display: flex; background: var(--bg); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.shelf-status button {
    border: 0; background: transparent; color: var(--fg-muted); cursor: pointer;
    padding: 7px 13px; font-size: 12px; font-weight: 600; line-height: 1;
    border-right: 1px solid var(--border); min-height: 34px;
  }
.shelf-status button:last-child { border-right: 0; }
.shelf-status button.active { background: var(--accent); color: #fff; }
.shelf-stars { display: flex; align-items: center; gap: 2px; }
.shelf-stars button {
    background: none; border: 0; cursor: pointer; font-size: 18px; padding: 2px;
    color: var(--border); transition: color .12s, transform .12s;
  }
.shelf-stars button:hover { transform: scale(1.15); }
.shelf-stars button.lit { color: #f5a623; }
@media (max-width: 560px) {
  .shelf-bar { gap: 10px; }
  .shelf-status button { padding: 8px 10px; }
}

/* ── Section quick-nav chips ────────────────────────────────── */
.section-nav {
    display: flex; gap: 8px; overflow-x: auto; -webkit-overflow-scrolling: touch;
    scrollbar-width: none; padding: 8px 2px; margin-bottom: 1rem;
    /* Stays visible while reading — sits just below the sticky 56px header.
       Desktop mice can also wheel-scroll it (page-level JS maps vertical
       wheel to horizontal scroll). */
    position: sticky; top: 56px; z-index: 40; background: var(--bg);
  }
.section-nav::-webkit-scrollbar { display: none; }
.section-nav a {
    flex-shrink: 0; white-space: nowrap; text-decoration: none;
    font-size: 12px; font-weight: 600; color: var(--fg-muted);
    background: var(--bg-subtle); border: 1px solid var(--border);
    border-radius: 999px; padding: 7px 14px;
  }
.section-nav a:hover { border-color: var(--accent); color: var(--accent); }

/* ── Characters (main-content cards, expand-in-place) ──────── */
.char-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
.char-item {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 14px 8px; cursor: pointer; text-align: center;
    border: 1px solid var(--border); border-radius: 12px; background: var(--bg-subtle);
    color: var(--fg); transition: border-color .15s, transform .15s;
  }
.char-item:hover { border-color: var(--accent); transform: translateY(-2px); }
.char-item.active { border-color: var(--accent); }
.char-avatar {
    width: 52px; height: 52px; border-radius: 50%; overflow: hidden;
    background: var(--bg); border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; font-weight: 800; color: var(--fg-faint); flex-shrink: 0;
  }
.char-avatar img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.char-name { font-size: 12px; font-weight: 700; line-height: 1.25; }
.char-role { font-size: 10px; color: var(--fg-faint); text-transform: capitalize; }
.char-detail-box {
    margin-top: 14px; padding: 16px; border: 1px solid var(--accent);
    border-radius: 12px; background: var(--bg-subtle);
    display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap;
  }
.char-detail-photo { width: 96px; border-radius: 10px; border: 1px solid var(--border); flex-shrink: 0; }
.char-detail-body { flex: 1; min-width: 220px; }
.char-facts { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 6px 14px; margin-top: 10px; }
.char-fact { font-size: 12px; color: var(--fg-muted); }
.char-fact b { color: var(--fg); font-weight: 600; }

/* ── Quiz (Test Your Knowledge) — dynamic page: live-generated via
   POST /quiz/book. Static page: pre-generated at publish time and baked
   into front matter (see _layouts/book.html's id="bh-quiz-data" block) —
   same verified pipeline, no live call needed. Moved here from
   summary.html's local styles once the static page needed them too;
   tools/pdf-chat.html keeps its own separate copy (unrelated tool, not
   part of this design system). ── */
.quiz-card { border: 1px solid var(--border); border-radius: 12px; padding: 18px; margin-bottom: 14px; background: var(--bg); }
.quiz-q { font-size: 14px; font-weight: 700; margin-bottom: 12px; line-height: 1.5; }
.quiz-option {
    display: block; width: 100%; text-align: left; padding: 10px 14px; margin-bottom: 8px;
    border: 1px solid var(--border); border-radius: 8px; background: var(--bg-subtle);
    color: var(--fg); font-size: 13px; cursor: pointer; transition: border-color .12s;
  }
.quiz-option:hover:not(:disabled) { border-color: var(--accent); }
.quiz-option:disabled { cursor: default; }
.quiz-option.correct { border-color: #22a06b; background: rgba(34,160,107,0.12); }
.quiz-option.incorrect { border-color: #d33; background: rgba(221,51,51,0.10); }
.quiz-quote {
    margin-top: 10px; padding: 10px 14px; border-left: 3px solid var(--accent);
    background: var(--bg-subtle); border-radius: 0 8px 8px 0; font-size: 12px;
    color: var(--fg-muted); font-style: italic; line-height: 1.6;
  }
.quiz-score { position: sticky; top: 0; z-index: 5; background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 10px 16px; font-size: 13px; font-weight: 600; margin-bottom: 14px; }