/*
 * reader-luxury.css — مكتبة ليبيا الطيبة Wave 2
 * المخطوطة design language · RTL Arabic · v=28
 */

/* ─── CSS Variables / Themes ─────────────────────────────────── */
:root {
  /* Parchment theme (default) */
  --bg:          #FAF6EE;
  --bg2:         #F0E9D8;
  --text:        #0F1B2D;
  --text-muted:  #5a6a7a;
  --gold:        #B89968;
  --gold-light:  #d4b87a;
  --red:         #B1373F;
  --bar-bg:      rgba(250,246,238,.94);
  --bar-border:  rgba(184,153,104,.35);
  --canvas-shadow: 0 8px 48px rgba(15,27,45,.18);
  --sidebar-bg:  #F5EFE2;
  --sidebar-border: rgba(184,153,104,.28);
  --btn-bg:      rgba(184,153,104,.12);
  --btn-hover:   rgba(184,153,104,.28);
  --transition:  380ms ease;
  --progress-h:  3px;
  --note-bg:     #fffbe8;
  --note-border: #e0c97a;
  --focus-hint:  rgba(15,27,45,.55);
}

[data-theme="sepia"] {
  --bg:          #f4ead5;
  --bg2:         #ede0c3;
  --text:        #5b4636;
  --text-muted:  #8a7060;
  --bar-bg:      rgba(244,234,213,.95);
  --sidebar-bg:  #ede0c4;
  --canvas-shadow: 0 8px 48px rgba(91,70,54,.20);
}

[data-theme="dark"] {
  --bg:          #1a1f2e;
  --bg2:         #141824;
  --text:        #d4cfc3;
  --text-muted:  #8a8a98;
  --bar-bg:      rgba(26,31,46,.95);
  --bar-border:  rgba(184,153,104,.20);
  --sidebar-bg:  #141824;
  --btn-bg:      rgba(184,153,104,.08);
  --btn-hover:   rgba(184,153,104,.20);
  --canvas-shadow: 0 8px 48px rgba(0,0,0,.55);
  --note-bg:     #1e2438;
  --note-border: #3a4060;
}

[data-theme="oled"] {
  --bg:          #0a0a0a;
  --bg2:         #111111;
  --text:        #c0c0c0;
  --text-muted:  #777;
  --bar-bg:      rgba(10,10,10,.97);
  --bar-border:  rgba(184,153,104,.15);
  --sidebar-bg:  #0f0f0f;
  --btn-bg:      rgba(184,153,104,.06);
  --btn-hover:   rgba(184,153,104,.16);
  --canvas-shadow: 0 8px 48px rgba(0,0,0,.8);
  --note-bg:     #151515;
  --note-border: #333;
}

/* ─── Reset & Base ────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Cairo', system-ui, sans-serif;
  direction: rtl;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── Progress Bar ────────────────────────────────────────────── */
#readingProgress {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  height: var(--progress-h);
  z-index: 200;
  background: var(--bg2);
  overflow: hidden;
  transition: opacity var(--transition);
}
#readingProgress .bar {
  height: 100%;
  background: linear-gradient(to left, var(--gold-light), var(--gold));
  transition: width 0.4s ease;
  width: 0%;
  border-radius: 0 2px 2px 0;
}
#readingProgress[title]:hover::after {
  content: attr(data-tip);
  position: absolute;
  right: 50%;
  transform: translateX(50%);
  top: 6px;
  background: var(--text);
  color: var(--bg);
  padding: 3px 10px;
  border-radius: 6px;
  font-size: .78rem;
  font-family: 'Cairo', sans-serif;
  white-space: nowrap;
  pointer-events: none;
}

/* ─── Luxury Toolbar ──────────────────────────────────────────── */
#luxBar {
  position: sticky;
  top: var(--progress-h);
  z-index: 100;
  background: var(--bar-bg);
  border-bottom: 1px solid var(--bar-border);
  backdrop-filter: blur(18px) saturate(180%);
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .6rem .85rem;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

/* RTL: right = book info, center = nav, left = tools */
.bar-right {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}
.bar-center {
  display: flex;
  align-items: center;
  gap: .4rem;
  flex-shrink: 0;
}
.bar-left {
  display: flex;
  align-items: center;
  gap: .35rem;
  flex: 1;
  justify-content: flex-end;
}

/* Gold rule under bar */
#luxBar::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  left: 0;
  height: 1px;
  background: linear-gradient(to left, transparent, var(--gold), transparent);
  opacity: .5;
  pointer-events: none;
}

/* ─── Toolbar Buttons ─────────────────────────────────────────── */
.lux-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .3rem;
  background: var(--btn-bg);
  border: 1px solid var(--bar-border);
  color: var(--text);
  border-radius: 10px;
  padding: .42rem .75rem;
  font-family: 'Reem Kufi', 'Cairo', sans-serif;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.lux-btn:hover, .lux-btn:focus-visible {
  background: var(--btn-hover);
  border-color: var(--gold);
  color: var(--gold);
  outline: none;
}
.lux-btn.active {
  background: var(--gold);
  border-color: var(--gold);
  color: #fff;
}
.lux-btn:disabled {
  opacity: .38;
  cursor: not-allowed;
  pointer-events: none;
}
.lux-btn.icon-only { padding: .42rem .55rem; }

/* Back arrow */
#backBtn { font-size: .9rem; }

/* Book title + author in toolbar */
.bar-title-block {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}
#barTitle {
  font-family: 'Aref Ruqaa','Cairo',serif;
  font-size: .96rem;
  font-weight: 700;
  color: var(--gold);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition);
}
#barAuthor {
  font-size: .75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Page nav */
#pageInput {
  width: 3.2rem;
  text-align: center;
  border: 1px solid var(--bar-border);
  border-radius: 8px;
  background: var(--btn-bg);
  color: var(--text);
  font-family: 'Cairo', sans-serif;
  font-size: .9rem;
  font-weight: 700;
  padding: .3rem .3rem;
  transition: border-color var(--transition), background var(--transition);
}
#pageInput:focus { border-color: var(--gold); outline: none; background: var(--bg); }
.page-sep { color: var(--text-muted); font-size: .85rem; margin: 0 .2rem; }
#totalPages { font-size: .85rem; color: var(--text-muted); font-weight: 700; }

/* Theme indicator dot */
.theme-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
  margin-inline-start: .25rem;
  transition: background .3s;
}

/* ─── Focus Mode ──────────────────────────────────────────────── */
body.focus-mode #luxBar {
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
}
body.focus-mode #readingProgress { opacity: 0; }
body.focus-mode #sidebarPanel { display: none !important; }

.focus-hint {
  position: fixed;
  bottom: 1.4rem;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: var(--focus-hint);
  color: #fff;
  padding: .55rem 1.2rem;
  border-radius: 20px;
  font-family: 'Cairo', sans-serif;
  font-size: .82rem;
  z-index: 500;
  pointer-events: none;
  opacity: 0;
  transition: opacity .5s;
}
.focus-hint.visible { opacity: 1; }

/* ─── Main Stage ──────────────────────────────────────────────── */
#readerShell {
  display: flex;
  min-height: calc(100vh - 56px);
}

/* ─── Sidebar Panel ───────────────────────────────────────────── */
#sidebarPanel {
  width: 300px;
  flex-shrink: 0;
  background: var(--sidebar-bg);
  border-inline-start: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  transition: width var(--transition), opacity var(--transition), background var(--transition);
  overflow: hidden;
}
#sidebarPanel.collapsed {
  width: 0;
  border: none;
  opacity: 0;
  pointer-events: none;
}
.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--sidebar-border);
}
.sidebar-tab {
  flex: 1;
  padding: .6rem .3rem;
  text-align: center;
  font-family: 'Reem Kufi','Cairo',sans-serif;
  font-size: .8rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  background: transparent;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.sidebar-tab.active {
  color: var(--gold);
  border-bottom-color: var(--gold);
}
.sidebar-pane {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: .75rem;
}
.sidebar-pane.active { display: block; }

/* Bookmark items */
.bookmark-item {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .55rem .6rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition);
  margin-bottom: .35rem;
  border: 1px solid transparent;
}
.bookmark-item:hover { background: var(--btn-hover); border-color: var(--bar-border); }
.bookmark-thumb {
  width: 38px;
  height: 52px;
  background: var(--bg2);
  border-radius: 3px;
  border: 1px solid var(--bar-border);
  flex-shrink: 0;
  overflow: hidden;
  position: relative;
}
.bookmark-thumb canvas { width: 100%; height: 100%; object-fit: cover; }
.bookmark-info { min-width: 0; }
.bookmark-page {
  font-family: 'Reem Kufi','Cairo',sans-serif;
  font-size: .82rem;
  font-weight: 700;
  color: var(--gold);
}
.bookmark-date {
  font-size: .72rem;
  color: var(--text-muted);
}
.bookmark-del {
  margin-inline-start: auto;
  background: none;
  border: none;
  color: var(--red);
  cursor: pointer;
  font-size: .85rem;
  opacity: .7;
  flex-shrink: 0;
  transition: opacity var(--transition);
}
.bookmark-del:hover { opacity: 1; }

/* Note items */
.note-item {
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  border-radius: 8px;
  padding: .65rem .75rem;
  margin-bottom: .5rem;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition);
}
.note-item:hover { border-color: var(--gold); transform: translateX(-2px); }
.note-header {
  display: flex;
  align-items: center;
  gap: .4rem;
  margin-bottom: .35rem;
}
.note-diamond { color: var(--gold); font-size: .85rem; }
.note-page { font-size: .78rem; color: var(--text-muted); }
.note-del {
  margin-inline-start: auto;
  background: none;
  border: none;
  color: var(--red);
  cursor: pointer;
  font-size: .8rem;
  opacity: .6;
}
.note-del:hover { opacity: 1; }
.note-content {
  font-family: 'Amiri', 'Cairo', serif;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
}

/* Highlights pane */
.hl-item {
  display: flex;
  align-items: flex-start;
  gap: .5rem;
  padding: .5rem .6rem;
  border-radius: 8px;
  margin-bottom: .35rem;
  border: 1px solid var(--bar-border);
  cursor: pointer;
  transition: background var(--transition);
}
.hl-item:hover { background: var(--btn-hover); }
.hl-swatch {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: .15rem;
}
.hl-text {
  font-size: .82rem;
  color: var(--text);
  line-height: 1.5;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.hl-page { font-size: .72rem; color: var(--text-muted); }
.hl-del {
  background: none;
  border: none;
  color: var(--red);
  cursor: pointer;
  font-size: .75rem;
  opacity: .6;
  flex-shrink: 0;
}
.hl-del:hover { opacity: 1; }

/* Reading time badge */
#readingTimeBadge {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--bar-bg);
  border: 1px solid var(--bar-border);
  color: var(--gold);
  padding: .5rem .9rem;
  border-radius: 20px;
  font-family: 'Reem Kufi','Cairo',sans-serif;
  font-size: .8rem;
  font-weight: 600;
  z-index: 90;
  backdrop-filter: blur(12px);
  opacity: 0;
  transition: opacity .5s;
  pointer-events: none;
}
#readingTimeBadge.visible { opacity: 1; }

/* ─── Stage & Canvas ──────────────────────────────────────────── */
#readerMain {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 1rem;
  min-height: calc(100vh - 56px);
  position: relative;
}

.pdf-wrapper {
  position: relative;
  display: inline-block;
  line-height: 0;
}

#pdfCanvas {
  max-width: 100%;
  height: auto;
  display: block;
  box-shadow: var(--canvas-shadow);
  border-radius: 4px;
  transition: box-shadow var(--transition);
}

/* PDF.js text layer */
.textLayer {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  overflow: hidden;
  opacity: 1;
  line-height: 1;
  pointer-events: auto;
  user-select: text;
}
.textLayer span {
  color: transparent;
  position: absolute;
  white-space: pre;
  cursor: text;
  transform-origin: 0% 0%;
  font-family: 'Amiri', serif;
  direction: rtl;
  -webkit-font-smoothing: antialiased;
}
.textLayer ::selection {
  background: rgba(251,225,108,.55);
  color: transparent;
}

/* Highlight overlays drawn over text layer */
.hl-overlay {
  position: absolute;
  pointer-events: none;
  border-radius: 3px;
  mix-blend-mode: multiply;
  z-index: 5;
  transition: opacity .2s;
}
[data-theme="dark"] .hl-overlay,
[data-theme="oled"] .hl-overlay { mix-blend-mode: screen; }

/* Sticky note margin markers */
.note-marker {
  position: absolute;
  width: 20px;
  height: 20px;
  background: var(--gold);
  color: #fff;
  font-size: .7rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
  transition: transform .2s;
  user-select: none;
}
.note-marker:hover { transform: scale(1.2); }

/* ─── Highlight Palette ───────────────────────────────────────── */
#hlPalette {
  position: fixed;
  z-index: 300;
  background: var(--bar-bg);
  border: 1px solid var(--bar-border);
  border-radius: 14px;
  padding: .55rem .8rem;
  display: flex;
  gap: .6rem;
  align-items: center;
  box-shadow: 0 8px 32px rgba(0,0,0,.22);
  backdrop-filter: blur(16px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s;
  user-select: none;
}
#hlPalette.visible { opacity: 1; pointer-events: auto; }

.hl-color-btn {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .18s, border-color .18s;
  flex-shrink: 0;
}
.hl-color-btn:hover { transform: scale(1.25); border-color: var(--text); }

.hl-note-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gold);
  font-size: 1.1rem;
  line-height: 1;
  transition: transform .18s;
  padding: 0 .15rem;
}
.hl-note-btn:hover { transform: scale(1.2); }

.hl-dismiss-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: .85rem;
  padding: 0 .1rem;
  transition: color .18s;
}
.hl-dismiss-btn:hover { color: var(--red); }

/* ─── Note Input Modal ────────────────────────────────────────── */
#noteModal {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15,27,45,.45);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
}
#noteModal.visible { opacity: 1; pointer-events: auto; }

.note-modal-box {
  background: var(--sidebar-bg);
  border: 1px solid var(--gold);
  border-radius: 16px;
  padding: 1.5rem;
  width: 92%;
  max-width: 480px;
  box-shadow: 0 16px 64px rgba(0,0,0,.3);
  direction: rtl;
}
.note-modal-title {
  font-family: 'Reem Kufi','Cairo',sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: .85rem;
}
#noteTextarea {
  width: 100%;
  min-height: 110px;
  resize: vertical;
  border: 1px solid var(--bar-border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font-family: 'Amiri','Cairo',serif;
  font-size: .95rem;
  line-height: 1.7;
  padding: .65rem .85rem;
  direction: rtl;
  transition: border-color var(--transition);
}
#noteTextarea:focus { border-color: var(--gold); outline: none; }
.note-modal-hint {
  font-size: .75rem;
  color: var(--text-muted);
  margin-top: .4rem;
  margin-bottom: .85rem;
}
.note-modal-actions {
  display: flex;
  gap: .6rem;
  justify-content: flex-end;
}

/* ─── Keyboard Shortcuts Overlay ──────────────────────────────── */
#shortcutsOverlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(15,27,45,.6);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
}
#shortcutsOverlay.visible { opacity: 1; pointer-events: auto; }

.shortcuts-box {
  background: var(--sidebar-bg);
  border: 1px solid var(--gold);
  border-radius: 18px;
  padding: 1.8rem 2rem;
  width: 92%;
  max-width: 440px;
  box-shadow: 0 20px 80px rgba(0,0,0,.35);
  direction: rtl;
}
.shortcuts-title {
  font-family: 'Reem Kufi','Cairo',sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 1.1rem;
  text-align: center;
}
.shortcut-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem 0;
  border-bottom: 1px solid var(--bar-border);
  font-size: .88rem;
}
.shortcut-row:last-child { border-bottom: none; }
.shortcut-label { color: var(--text-muted); }
.shortcut-key {
  background: var(--btn-bg);
  border: 1px solid var(--bar-border);
  border-radius: 7px;
  padding: .2rem .65rem;
  font-family: 'Cairo', monospace;
  font-size: .82rem;
  font-weight: 700;
  color: var(--gold);
  white-space: nowrap;
}
.shortcuts-close {
  display: block;
  width: 100%;
  margin-top: 1.2rem;
  text-align: center;
}

/* ─── Toast Notification ──────────────────────────────────────── */
.lux-toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background: var(--bar-bg);
  color: var(--gold);
  border: 1px solid var(--bar-border);
  padding: .7rem 1.3rem;
  border-radius: 12px;
  font-family: 'Reem Kufi','Cairo',sans-serif;
  font-size: .88rem;
  z-index: 600;
  box-shadow: 0 8px 32px rgba(0,0,0,.25);
  backdrop-filter: blur(14px);
  animation: luxToastIn .38s cubic-bezier(.34,1.56,.64,1) both;
  pointer-events: none;
}
@keyframes luxToastIn {
  from { transform: translateX(-50%) translateY(16px); opacity: 0; }
  to   { transform: translateX(-50%) translateY(0); opacity: 1; }
}

/* ─── Loading / Error States ──────────────────────────────────── */
#readerMessage {
  width: 100%;
  max-width: 560px;
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text);
}
#readerMessage h2 {
  font-family: 'Aref Ruqaa','Cairo',serif;
  color: var(--gold);
  margin-bottom: 1rem;
  font-size: 1.4rem;
}
#readerMessage a { color: var(--gold); text-decoration: underline; }

.reader-spinner {
  display: inline-block;
  width: 28px;
  height: 28px;
  border: 3px solid var(--bar-border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  vertical-align: middle;
  margin-inline-end: .6rem;
}
@media (prefers-reduced-motion: reduce) {
  .reader-spinner { animation: none; }
  * { transition-duration: 1ms !important; animation-duration: 1ms !important; }
}
@keyframes spin { to { transform: rotate(360deg); } }

.status-line {
  font-size: .8rem;
  color: var(--gold);
  opacity: .75;
  margin-top: .85rem;
  font-family: 'Cairo',sans-serif;
}

/* Iframe fallback */
.iframe-stage {
  width: 100%;
  height: calc(100vh - 56px);
  border: 0;
  display: block;
}

/* ─── Zoom Control ────────────────────────────────────────────── */
#zoomLabel {
  font-size: .8rem;
  color: var(--text-muted);
  min-width: 2.8rem;
  text-align: center;
  font-family: 'Cairo',sans-serif;
  font-weight: 700;
}

/* ─── Empty States ────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-muted);
  font-family: 'Reem Kufi','Cairo',sans-serif;
  font-size: .85rem;
  line-height: 2;
}
.empty-icon { font-size: 2rem; display: block; margin-bottom: .5rem; }

/* ─── Mobile (< 640px) ─────────────────────────────────────────── */
@media (max-width: 640px) {
  #sidebarPanel {
    position: fixed;
    bottom: 0;
    right: 0;
    left: 0;
    width: 100% !important;
    height: 60vh;
    border-radius: 20px 20px 0 0;
    z-index: 150;
    transform: translateY(100%);
    transition: transform var(--transition), opacity var(--transition);
    opacity: 0;
  }
  #sidebarPanel.open {
    transform: translateY(0);
    opacity: 1;
  }
  #sidebarPanel.collapsed { transform: translateY(100%); opacity: 0; width: 100% !important; }
  #readerShell { flex-direction: column; }
  #barTitle { font-size: .84rem; }
  #barAuthor { display: none; }
  .lux-btn { padding: .38rem .55rem; font-size: .78rem; }
  #zoomLabel { display: none; }
  #readingTimeBadge { bottom: 4.5rem; right: .75rem; }
}

/* ─── Scrollbar styling ────────────────────────────────────────── */
#sidebarPanel ::-webkit-scrollbar { width: 5px; }
#sidebarPanel ::-webkit-scrollbar-track { background: transparent; }
#sidebarPanel ::-webkit-scrollbar-thumb { background: var(--bar-border); border-radius: 3px; }