/* ============================================================
   reader.css — alchemical-textbook skin for the PDF.js viewer
   Imported AFTER pdfjs/web/pdf_viewer.css so we can override.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;500;600&family=Cormorant+Garamond:wght@400;500&family=IM+Fell+English+SC&display=swap');

:root {
  --parchment: #f4ecd8;
  --parchment-deep: #ebe0c4;
  --parchment-shadow: #d9c9a3;
  --ink: #2a1f14;
  --ink-soft: #4a3826;
  --ink-faded: #6b5638;
  --gold: #9a7b2e;
  --gold-bright: #c4a052;
  --gold-deep: #6b5420;
  --crimson: #6b1f1f;
  --rule: rgba(106, 84, 32, 0.35);
  --rule-strong: rgba(106, 84, 32, 0.55);
  --toolbar-height: 52px;
  --findbar-height: 48px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  height: 100%;
  background: var(--parchment-deep);
  font-family: 'Cormorant Garamond', Georgia, serif;
  color: var(--ink);
  overflow: hidden;
}

#reader-root {
  position: relative;
  height: 100vh;
  width: 100%;
}

/* ---------- Toolbar ---------- */
#reader-toolbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: var(--toolbar-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1rem;
  background:
    linear-gradient(to bottom, var(--parchment), var(--parchment-deep));
  border-bottom: 1px double var(--rule-strong);
  box-shadow: 0 1px 0 rgba(154, 123, 46, 0.15);
  gap: 1rem;
  z-index: 50;
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

#reader-toolbar button,
#reader-toolbar select {
  font-family: 'Cormorant Garamond', serif;
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink-soft);
  font-size: 1.2rem;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: background 180ms, color 180ms, border-color 180ms;
  border-radius: 2px;
}

#reader-toolbar button:hover {
  background: rgba(154, 123, 46, 0.12);
  border-color: var(--rule);
  color: var(--gold-deep);
}

#reader-toolbar button.active {
  background: rgba(154, 123, 46, 0.18);
  border-color: var(--gold);
  color: var(--gold-deep);
}

#reader-toolbar button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

#page-info {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: 'IM Fell English SC', serif;
  font-size: 0.95rem;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
  padding: 0 0.4rem;
}

#page-input {
  width: 3.2rem;
  text-align: center;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.05rem;
  color: var(--ink);
  padding: 0.2rem;
  outline: none;
}

#page-input:focus {
  border-bottom-color: var(--gold);
}

.page-divider {
  font-style: italic;
  color: var(--ink-faded);
  font-size: 0.9rem;
}

#page-total {
  font-style: italic;
  color: var(--ink-faded);
}

#zoom-select {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.95rem;
  min-width: 110px;
  height: 32px;
  padding: 0 0.5rem;
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--ink-soft);
  cursor: pointer;
}

#zoom-select:hover {
  border-color: var(--gold);
  color: var(--gold-deep);
}

/* ---------- Find bar ---------- */
#find-bar {
  position: absolute;
  top: var(--toolbar-height);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--parchment);
  border: 1px solid var(--rule-strong);
  border-top: none;
  border-radius: 0 0 4px 4px;
  box-shadow: 0 4px 12px rgba(42, 31, 20, 0.18);
  z-index: 60;
  height: var(--findbar-height);
}

#find-bar[hidden] { display: none; }

#find-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--rule);
  padding: 0.3rem 0.4rem;
  font-family: 'Cormorant Garamond', serif;
  font-size: 1rem;
  color: var(--ink);
  width: 260px;
  outline: none;
}

#find-input:focus { border-bottom-color: var(--gold); }

#find-bar button {
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink-soft);
  width: 30px; height: 30px;
  cursor: pointer;
  border-radius: 2px;
  font-size: 1.05rem;
  transition: background 180ms, color 180ms, border-color 180ms;
}

#find-bar button:hover {
  background: rgba(154, 123, 46, 0.12);
  border-color: var(--rule);
  color: var(--gold-deep);
}

#find-status {
  font-family: 'IM Fell English SC', serif;
  font-size: 0.85rem;
  color: var(--ink-faded);
  letter-spacing: 0.04em;
  min-width: 80px;
  font-style: italic;
}

/* ---------- TOC Sidebar ---------- */
#toc-sidebar {
  position: absolute;
  top: var(--toolbar-height);
  left: 0;
  width: 280px;
  height: calc(100vh - var(--toolbar-height));
  background: var(--parchment);
  border-right: 1px solid var(--rule-strong);
  overflow-y: auto;
  padding: 1.4rem 1.2rem;
  z-index: 40;
  box-shadow: 2px 0 10px rgba(42, 31, 20, 0.08);
}

#toc-sidebar[hidden] { display: none; }

#toc-sidebar h2 {
  font-family: 'Cinzel', serif;
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
}

#toc-list a {
  display: block;
  padding: 0.4rem 0.2rem;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.98rem;
  line-height: 1.4;
  border-bottom: 1px dotted transparent;
  transition: color 180ms, border-color 180ms;
}

#toc-list a:hover {
  color: var(--gold-deep);
  border-bottom-color: var(--gold);
}

#toc-list .toc-level-1 { padding-left: 0; font-weight: 500; }
#toc-list .toc-level-2 { padding-left: 1rem; font-size: 0.92rem; }
#toc-list .toc-level-3 { padding-left: 2rem; font-size: 0.88rem; font-style: italic; }

.toc-empty {
  font-style: italic;
  color: var(--ink-faded);
  font-size: 0.95rem;
}

/* ---------- Viewer container ---------- */
/* Must be absolutely positioned per PDFViewer constructor requirement */
#viewer-container {
  position: absolute;
  top: var(--toolbar-height);
  left: 0;
  right: 0;
  bottom: 0;
  overflow: auto;
  background:
    radial-gradient(ellipse at top, rgba(154, 123, 46, 0.05), transparent 60%),
    var(--parchment-deep);
  padding: 1.5rem 0;
  transition: left 220ms ease;
}

#reader-root.sidebar-open #viewer-container {
  left: 280px;
}

/* PDF.js viewer override — center pages, give them a nice card look */
.pdfViewer {
  margin: 0 auto;
}

.pdfViewer .page {
  margin: 0 auto 1.5rem;
  border: 1px solid var(--rule);
  box-shadow:
    0 1px 0 rgba(154, 123, 46, 0.15),
    0 6px 20px rgba(42, 31, 20, 0.18);
  background-color: #fdfaf2;
  background-clip: content-box;
}

/* Override the default text-selection highlight color */
.pdfViewer .textLayer ::selection {
  background: rgba(196, 160, 82, 0.4);
}

/* Find-match highlight (PDF.js applies these class names) */
.pdfViewer .textLayer .highlight {
  background: rgba(196, 160, 82, 0.35);
  border-radius: 2px;
}
.pdfViewer .textLayer .highlight.selected {
  background: rgba(154, 123, 46, 0.55);
}

/* ---------- Loading overlay ---------- */
#loading-overlay {
  position: absolute;
  inset: 0;
  background: var(--parchment);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  transition: opacity 400ms ease;
}

#loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-content {
  text-align: center;
  max-width: 320px;
}

.loading-glyph {
  font-size: 2rem;
  color: var(--gold);
  letter-spacing: 1rem;
  margin-bottom: 1.2rem;
  animation: pulse-soft 2.4s ease-in-out infinite;
}

@keyframes pulse-soft {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

.loading-content p {
  font-family: 'IM Fell English SC', serif;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  margin-bottom: 1.4rem;
  font-size: 1rem;
}

.loading-bar {
  width: 100%;
  height: 2px;
  background: var(--rule);
  overflow: hidden;
  border-radius: 1px;
}

.loading-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right, var(--gold), var(--gold-bright));
  transition: width 300ms ease;
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  :root { --toolbar-height: auto; }

  #reader-toolbar {
    flex-wrap: wrap;
    padding: 0.5rem;
    gap: 0.4rem;
    justify-content: center;
  }

  .tool-group {
    gap: 0.2rem;
  }

  #reader-toolbar button,
  #reader-toolbar select {
    width: 32px;
    height: 32px;
    font-size: 1.05rem;
  }

  #find-input { width: 160px; }

  #toc-sidebar {
    width: 85%;
    max-width: 320px;
  }

  #reader-root.sidebar-open #viewer-container {
    left: 0;
  }
}