/* ==========================================================================
   📖 PREMIUM BOOK READER & LIBRARY MENU - OPTIMIZED CSS
   ========================================================================== */

/* === CSS Variables === */
:root {
    --book-bg: var(--color-surface-container-low);
    --book-bg-alt: #f5f0e8;
    --book-text: #2c2c2c;
    --book-text-light: #5a5a5a;
    --book-accent: var(--color-tertiary);
    --book-accent-light: #c4a44a;
    --book-border: var(--color-outline-variant);
    --book-shadow: rgba(60, 40, 10, 0.08);
    --book-shadow-deep: rgba(60, 40, 10, 0.15);
    --book-divider: #d4c9b0;
    --book-highlight: #fff9e6;
    --breadcrumb-bg: linear-gradient(135deg, #f7f3eb 0%, #ede6d6 100%);
    --breadcrumb-active: linear-gradient(135deg, #fff9ed 0%, #e8dcc6 100%);
    --book-font-bn: var(--font-bn, 'Tiro Bangla', sans-serif);
    --book-font-heading: 'Tiro Bangla', Georgia, serif;
    --arabic-font-family: var(--font-arabic, 'Scheherazade New', serif);
    --arabic-font-size: 22px;
    --arabic-line-height: 2.0;
}

/* ==========================================================================
   0. CATEGORY ICON SYSTEM (lib_categories icon_type support)
   ========================================================================== */
/* Base icon container */
.cat-icon {
    display: inline-flex; align-items: center; justify-content: center;
    margin-right: 6px; font-size: var(--text-18); width: 24px; height: 24px;
    flex-shrink: 0; vertical-align: middle;
    padding-top: 7px;
}
.cat-icon-emoji { font-style: normal; font-size: var(--text-18); }
.cat-icon-material { font-family: 'Material Icons' !important; font-size: 20px; font-weight: normal; font-style: normal; }
.cat-icon-image { width: 22px; height: 22px; object-fit: contain; border-radius: 3px; }
.cat-icon-svg { display: inline-flex; }
.cat-icon-svg svg { width: 20px; height: 20px; }

/* Hide default ::before when custom icon is present */
#v2-library-menu label.custom-icon.has-children::before { display: none !important; content: none !important; }
#v2-library-menu label.custom-icon.has-content::before { display: none !important; content: none !important; }

/* Pre-defined CSS class icons (icon_type = 'css-class') */
.cat-icon-quran::before { content: '📖'; }
.cat-icon-hadith::before { content: '📜'; }
.cat-icon-tafsir::before { content: '🔍'; }
.cat-icon-seerah::before { content: '🕌'; }
.cat-icon-fiqh::before { content: '⚖️'; }
.cat-icon-aqeedah::before { content: '💎'; }
.cat-icon-dua::before { content: '🤲'; }
.cat-icon-history::before { content: '🏛️'; }
.cat-icon-video::before { content: '🎬'; }
.cat-icon-interactive::before { content: '🎓'; }
.cat-icon-akhlaq::before { content: '🌺'; }
.cat-icon-family::before { content: '👨‍👩‍👧'; }
.cat-icon-akhirat::before { content: '🌅'; }
.cat-icon-salat::before { content: '🙏'; }
.cat-icon-dawah::before { content: '📢'; }
.cat-icon-economy::before { content: '💹'; }
.cat-icon-others::before { content: '📁'; }

/* Category icon in dashboard cards */
.lib-cat-icon .cat-icon { font-size: 28px; width: 40px; height: 40px; }

/* === Animations === */
@keyframes fadeInSlideUp { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { to { opacity: 1; } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
@keyframes v2-spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
@keyframes audioPulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(139, 105, 20, 0.4); }
    50% { transform: scale(1.15); box-shadow: 0 0 0 8px rgba(139, 105, 20, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(139, 105, 20, 0); }
}
@keyframes audioIconBounce {
    0%,100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* ==========================================================================
   1. GLOBAL FIXES & LAYOUT
   ========================================================================== */
 
/* ==========================================================================
   2. LIBRARY MENU ROOT (Legacy specific colors)
   ========================================================================== */
#libraryMenuRoot .level-1>label { background-color: #f0f4f8; border-left: 4px solid #1e88e5; font-weight: bold; }
#libraryMenuRoot .level-2>label { background-color: #f1f8e9; padding-left: 28px !important; border-left: 4px solid #43a047; }
#libraryMenuRoot .level-3>label { background-color: #fff8e1; padding-left: 42px !important; border-left: 4px solid #fdd835; }
#libraryMenuRoot .level-4>label { background-color: #fbe9e7; padding-left: 56px !important; border-left: 4px solid #ff8a65; }

#libraryMenuRoot .level-1>label.calif::before { content: '📚'; margin-right: 8px; }
#libraryMenuRoot .level-2>label.calif::before { content: '📖'; }
#libraryMenuRoot .level-3>label.calif::before { content: '📄'; }

/* ==========================================================================
   3. V2 LIBRARY & HADITH MENU (Core Structure)
   ========================================================================== */
#v2-library-menu, #v2-hadith-menu { list-style: none; padding: 0; margin: 0; font-family: var(--font-bn), sans-serif; }
#v2-library-menu ul, #v2-hadith-menu ul { list-style: none; padding-left: 15px; border-left: 1px solid #e0e0e0; position: relative; z-index: 1; }
#v2-library-menu li, #v2-hadith-menu li { margin: 4px 0; position: relative; z-index: auto; }
#v2-library-menu input[type="checkbox"], #v2-hadith-menu input[type="checkbox"] { display: none; }

#v2-library-menu label, #v2-hadith-menu label {
    display: block; padding: 8px 12px; cursor: pointer; transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important; border-radius: 30px; margin: 0;
}
#v2-library-menu label.sticky-header { border-radius: 4px; }

#v2-library-menu input:checked+label+ul, #v2-hadith-menu input:checked+label+ul { display: block; }
#v2-library-menu input:not(:checked)+label+ul, #v2-hadith-menu input:not(:checked)+label+ul { display: none; }

/* Submenu adjustment */
#sidebar_main .menu_section>ul>li.submenu_trigger li ul { margin-left: 5px; }

/* Content Leaf Icons */
#v2-library-menu label.has-children::before, #v2-hadith-menu label.has-children::before { content: '📁'; margin-right: 2px; font-size: var(--text-14); }
#v2-library-menu label.has-content::before, #v2-hadith-menu label.has-content::before { content: '📄'; margin-right: 0; color: #512da8; }

#v2-library-menu li.act_item>label, #v2-hadith-menu li.act_item>label {
    background: linear-gradient(135deg, #ffa6a6, #77fff9) !important; color: #070707 !important;
    border-left-color: #bf360c !important; font-weight: bold !important;
    box-shadow: 0 4px 20px rgba(255, 87, 34, 0.6) !important; transform: scale(1.05) !important; border-radius: 8px !important;
}

/* ==========================================================================
   4. MENU LEVELS (Gradients & Spacing)
   ========================================================================== */
/* LEVEL 1 */
#v2-library-menu .level-1>label { color: #070707 !important; font-weight: bold !important; border-left: 5px solid #b983ff !important; padding: 12px 15px !important; font-size: var(--text-base) !important; box-shadow: 0 2px 8px rgba(33, 150, 243, 0.3) !important; }
#v2-library-menu .level-1>label.has-children::before { content: '📚 '; color: #1976d2; font-size: 19px; }
#v2-library-menu .level-1+ul { border-left: 3px solid #2196f3 !important; margin-left: 15px !important; padding-left: 10px !important; background: rgba(33, 150, 243, 0.05) !important; }

/* LEVEL 2 */
#v2-library-menu .level-2>label { color: #070707 !important; font-weight: 600 !important; border-left: 5px solid var(--color-secondary) !important; padding: 10px 20px 10px 35px !important; font-size: var(--text-md) !important; box-shadow: 0 2px 6px rgba(76, 175, 80, 0.3) !important; margin-left: 10px !important; }
#v2-library-menu .level-2>label.has-children::before { content: '📗'; color: #388e3c; }
#v2-library-menu .level-2+ul { border-left: 3px solid #4caf50 !important; margin-left: 20px !important; padding-left: 8px !important; background: rgba(76, 175, 80, 0.05) !important; }

/* LEVEL 3 */
#v2-library-menu .level-3>label { color: #000 !important; font-weight: 500 !important; border-left: 4px solid var(--color-accent-orange) !important; padding: 9px 25px 9px 50px !important; font-size: var(--text-14) !important; box-shadow: 0 2px 5px rgba(255, 152, 0, 0.3) !important; margin-left: 20px !important; }
#v2-library-menu .level-3>label.has-children::before { content: '📙'; color: #f57c00; }
#v2-library-menu .level-3+ul { border-left: 2px solid #ff9800 !important; margin-left: 25px !important; padding-left: 6px !important; background: rgba(255, 152, 0, 0.05) !important; }

/* LEVEL 4 */
#v2-library-menu .level-4>label { color: #000 !important; font-weight: 500 !important; border-left: 4px solid var(--color-error) !important; padding: 8px 30px 8px 65px !important; font-size: var(--text-sm) !important; box-shadow: 0 2px 4px rgba(244, 67, 54, 0.3) !important; margin-left: 30px !important; }
#v2-library-menu .level-4>label.has-children::before { content: '📕'; color: #d32f2f; }
#v2-library-menu .level-4+ul { border-left: 2px solid #f44336 !important; margin-left: 30px !important; padding-left: 4px !important; background: rgba(244, 67, 54, 0.05) !important; }

/* LEVEL 5 */
#v2-library-menu .level-5>label { color: #000 !important; font-weight: 400 !important; border-left: 3px solid #6a1b9a !important; padding: 7px 35px 7px 80px !important; font-size: var(--text-root) !important; box-shadow: 0 1px 3px rgba(156, 39, 176, 0.3) !important; margin-left: 40px !important; }
#v2-library-menu .level-5>label.has-children::before { content: '📔'; color: #7b1fa2; }
#v2-library-menu .level-5+ul { border-left: 1px solid #9c27b0 !important; margin-left: 35px !important; padding-left: 3px !important; background: rgba(156, 39, 176, 0.05) !important; }

/* LEVEL 6 */
#v2-library-menu .level-6>label { color: #080808 !important; font-weight: 400 !important; border-left: 3px solid var(--color-accent-teal) !important; padding: 6px 40px 6px 95px !important; font-size: var(--text-xs) !important; box-shadow: 0 1px 2px rgba(0, 150, 136, 0.3) !important; margin-left: 50px !important; }
#v2-library-menu .level-6>label.has-children::before { content: '📒'; color: #009688; }

/* Open Book Icons on Expansion */
#v2-library-menu li.expanded > label.has-children::before { content: '📖'; }

/* Hover & Content States */
#v2-library-menu .level-1>label:hover, #v2-library-menu .level-2>label:hover, #v2-library-menu .level-3>label:hover { background: linear-gradient(135deg, #89ffe0, #64adff) !important; }
#v2-library-menu .level-1>label:hover { transform: translateX(3px) !important; box-shadow: 0 4px 12px rgba(33, 150, 243, 0.4) !important; }
#v2-library-menu .level-2>label:hover { transform: translateX(2px) !important; box-shadow: 0 3px 10px rgba(76, 175, 80, 0.4) !important; }
#v2-library-menu .level-3>label:hover { transform: translateX(2px) !important; box-shadow: 0 3px 8px rgba(255, 152, 0, 0.4) !important; }
#v2-library-menu .level-4>label:hover { background: linear-gradient(135deg, #d32f2f, #c62828) !important; transform: translateX(1px) !important; box-shadow: 0 2px 6px rgba(244, 67, 54, 0.4) !important; }
#v2-library-menu .level-5>label:hover { background: linear-gradient(135deg, #7b1fa2, #6a1b9a) !important; transform: translateX(1px) !important; box-shadow: 0 2px 5px rgba(156, 39, 176, 0.4) !important; }
#v2-library-menu .level-6>label:hover { background: linear-gradient(135deg, #00796b, #00695c) !important; box-shadow: 0 2px 4px rgba(0, 150, 136, 0.4) !important; }

#v2-library-menu label.has-content { color: #050505 !important; font-weight: normal !important; border-left: 4px solid #4527a0 !important; border-radius: 6px !important; }
#v2-library-menu label.has-content:hover { background: linear-gradient(135deg, #e1f7c3, #7aebff) !important; transform: scale(1.02) !important; box-shadow: 0 4px 15px rgba(103, 58, 183, 0.5) !important; }

/* ==========================================================================
   5. ULTIMATE STICKY HEADERS (JS Integrated)
   ========================================================================== */
#v2-library-menu .sticky-header, #v2-hadith-menu .sticky-header { position: sticky; top: 0; background-color: var(--color-surface); z-index: 2; }

#v2-library-menu label.is-sticky, 
#v2-library-menu label.sticky-header.is-sticky {
    position: sticky !important; border-bottom: 1px solid #dee2e6 !important;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15) !important; width: 100% !important;
    margin: 0 !important; padding: 8px 10px !important; display: block !important; box-sizing: border-box !important;
}

/* Book labels with fav button: always flex, even when sticky (overrides display:block !important above) */
#v2-library-menu label.lib-has-fav,
#v2-library-menu label.lib-has-fav.is-sticky,
#v2-library-menu label.lib-has-fav.sticky-header.is-sticky {
  display: flex !important;
  align-items: center !important;
  gap: 0 !important;
}
#v2-library-menu label.lib-has-fav .menu-title {
  flex: 1; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-size: calc(1em - 1px);
}
#v2-library-menu label.lib-has-fav .menu-subtitle {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

#v2-library-menu label.is-sticky + ul { position: relative; z-index: 1 !important; }

 
[data-theme="dark"] #v2-library-menu label.is-sticky,
[data-theme="dark"] #v2-library-menu label.sticky-header.is-sticky { background: var(--dm-surface) !important; border-bottom-color: var(--dm-divider) !important; color: var(--dm-text) !important; box-shadow: 0 1px 0 var(--dm-divider) !important; }
[data-theme="dark"] #v2-library-menu label.sticky-header:hover { background: var(--dm-surface-hover) !important; }

/* MANUAL LEVEL-WISE STICKY HEADERS */
#v2-library-menu .level-1>label.sticky-header { top: 0px !important; z-index: 1010 !important; border-bottom: 1px solid #8cc5ff !important; box-shadow: 0 2px 4px rgba(0,0,0,0.19) !important; margin: 5px 0 !important; padding: 7px 10px !important; border-radius: 25px !important; background-image: linear-gradient(261deg, #e5f3f9 0%, #f5d7ff 100%); }
#v2-library-menu .level-2>label.sticky-header { top: 40px !important; z-index: 1009 !important; box-shadow: 0 1px 2px rgba(0,0,0,0.1) !important; margin: 3px 0 !important; padding: 10px !important; border-radius: 18px !important; background-image: linear-gradient(261deg, #f9ede5 0%, #ddffd7 100%); }
#v2-library-menu .level-3>label.sticky-header { top: 80px !important; z-index: 1008 !important; margin: 3px 0 !important; padding: 10px !important; border-radius: 18px !important; background-color: #d6edff; }
#v2-library-menu .level-4>label.sticky-header { top: 120px !important; z-index: 1007 !important; margin: 3px 0 !important; padding: 9px 10px !important; border-radius: 18px !important; background-color: #fffcfc; }
#v2-library-menu .level-5>label.sticky-header { top: 160px !important; z-index: 1006 !important; margin: 5px 0 !important; padding: 8px 10px !important; border-radius: 18px !important; }
#v2-library-menu .level-6>label.sticky-header { top: 200px !important; z-index: 1005 !important; margin: 0 !important; padding: 8px 10px !important; border-radius: 18px !important; }
#v2-library-menu .level-7>label.sticky-header { top: 240px !important; z-index: 1004 !important; }
#v2-library-menu .level-8>label.sticky-header { top: 280px !important; z-index: 1003 !important; background: #e9ecef !important; }
#v2-library-menu .level-9>label.sticky-header { top: 320px !important; z-index: 1002 !important; background: #f1f3f4 !important; }
#v2-library-menu .level-10>label.sticky-header { top: 360px !important; z-index: 1001 !important; }

/* Dark mode sticky overrides */
[data-theme="dark"] #v2-library-menu .level-1>label.sticky-header, [data-theme="dark"] #v2-library-menu .level-3>label.sticky-header, [data-theme="dark"] #v2-library-menu .level-5>label.sticky-header { background: var(--dm-surface) !important; color: var(--dm-text) !important; border-bottom-color: rgba(62,166,255,0.2) !important; }
[data-theme="dark"] #v2-library-menu .level-2>label.sticky-header, [data-theme="dark"] #v2-library-menu .level-4>label.sticky-header, [data-theme="dark"] #v2-library-menu .level-6>label.sticky-header { background: var(--dm-surface) !important; color: var(--dm-text) !important; border-bottom-color: rgba(60,186,84,0.2) !important; }

/* Loaders */
.v2-loader-container { text-align: center; padding: 20px; }
.v2-loader { border: 4px solid #f3f3f3; border-top-color: #3498db; border-radius: 50%; width: 30px; height: 30px; animation: v2-spin 1s linear infinite; display: inline-block; }

/* ==========================================================================
   6. CHAPTER NAVIGATION
   ========================================================================== */
.chapter-navigation, .library-chapter-navigation { display: flex; justify-content: space-between; margin: 20px; gap: 20px; }
.chapter-nav-btn, .library-chapter-nav-btn {
    display: flex; align-items: center; gap: 15px; background-color: var(--color-surface); border: 1px solid #e0d9cb;
    border-radius: var(--radius-sm); padding: 10px 15px; cursor: pointer; text-align: left; width: 48%;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease; box-shadow: var(--elevation-2);
}
.library-chapter-nav-btn { background: var(--book-bg); border-color: var(--book-border); padding: 12px 16px; box-shadow: 0 2px 6px var(--book-shadow); }

.chapter-nav-btn:hover, .library-chapter-nav-btn:hover { border-color: #3498db; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); transform: translateY(-2px); }
.library-chapter-nav-btn:hover { border-color: var(--book-accent-light); box-shadow: 0 4px 16px var(--book-shadow-deep); }

.chapter-nav-btn.next, .library-chapter-nav-btn.next { justify-content: flex-end; text-align: right; }
.chapter-nav-btn .nav-text, .library-chapter-nav-btn .nav-text { display: flex; flex-direction: column; }
.chapter-nav-btn small { font-size: var(--text-root); color: #777; }
.library-chapter-nav-btn small { font-size: var(--text-xs); color: var(--book-text-light); }
.chapter-nav-btn .nav-text span { font-weight: bold; color: #333; font-size: var(--text-md); }
.library-chapter-nav-btn .nav-text span { font-weight: 600; color: var(--book-text); font-size: var(--text-14); }
.chapter-nav-btn .arrow { font-size: 24px; color: #3498db; }
.library-chapter-nav-btn .arrow { font-size: var(--text-22); color: var(--book-accent); }

/* ==========================================================================
   7. PREMIUM BOOK READER UI
   ========================================================================== */
#library-book-view { max-width: 100%; margin: 0 auto; padding: 0px 0; }
.library-md-card {
    background: var(--book-bg); border: none; border-radius: 10px; padding: 35px 45px 40px; margin: 12px 43px;
    box-shadow: 0 1px 3px var(--book-shadow), 0 2px 8px var(--book-shadow);
    position: relative; border-right: 1px solid var(--book-border); border-bottom: 1px solid var(--book-border);
    contain: layout style paint;
}
.library-multiple-chapters-container .library-md-card { margin-bottom: 32px; }
.library-multiple-chapters-container .library-md-card:last-child { margin-bottom: 12px; }

.library-chapter-title {
    font-family: var(--book-font-heading); font-size: 1.45rem; font-weight: 700; color: var(--book-accent);
    text-align: center; margin: 0 0 8px 0; padding: 15px 10px 12px; line-height: 1.5; letter-spacing: 0.3px;
}
.library-md-card hr { border: none; height: 1px; background: linear-gradient(to right, transparent, var(--book-divider), var(--book-accent-light), var(--book-divider), transparent); margin: 0 auto 28px; max-width: 60%; }

/* Content Typography */
.library-content-element {
    font-family: 'Scheherazade New', var(--book-font-bn); font-size: var(--library-font-sz, 17.5px); line-height: 1.95; color: var(--book-text);
    text-align: justify; word-wrap: break-word; overflow-wrap: break-word; hyphens: auto; unicode-bidi: plaintext; white-space: pre-wrap;
}
.library-content-element p { font-family: 'Scheherazade New', var(--book-font-bn); margin: 0 0 1.0em 0; text-indent: 1.5em; unicode-bidi: plaintext; }
.library-content-element br { display: block; content: ""; margin-bottom: 0.8em; }
.library-content-element p:first-child { text-indent: 0; }
.library-content-element p:first-child::first-letter { font-size: 2.0em; font-weight: 700; color: var(--book-accent); float: left; line-height: 1; margin: 4px 6px 0 0; font-family: var(--book-font-heading); }
.library-content-element div, .library-content-element span { unicode-bidi: plaintext; }
.library-md-card-content h2 { font-family: var(--book-font-heading); text-align: center; margin: 30px 0 20px; padding-bottom: 12px; border-bottom: 1px solid var(--book-border); font-weight: 700; font-size: 1.25rem; color: var(--book-accent); }
.library-content-element sup { font-size: 0.7em; color: var(--book-accent); font-weight: 600; cursor: pointer; }

/* AI-formatted content (content_html) — h3, blockquote, hr, strong */
.library-content-element h3 {
    font-family: var(--book-font-heading); font-size: 1.1rem; font-weight: 700; color: var(--book-accent);
    margin: 28px 0 10px; padding: 0; text-indent: 0; text-align: left; line-height: 1.5;
}
.library-content-element h4 {
    font-family: var(--book-font-heading); font-size: 1rem; font-weight: 600; color: var(--book-text);
    margin: 20px 0 8px; text-indent: 0; text-align: left;
}
.library-content-element blockquote {
    margin: 20px 0; padding: 18px 22px; background: rgba(139, 105, 20, 0.04);
    border-left: 4px solid var(--book-accent); border-radius: 0 8px 8px 0;
    font-style: normal; white-space: normal; text-indent: 0;
}
.library-content-element blockquote p { text-indent: 0; margin: 0 0 0.8em; }
.library-content-element blockquote p:last-child { margin-bottom: 0; font-size: 0.9em; color: var(--book-text-light); }
.library-content-element blockquote strong {
    font-family: var(--arabic-font-family); direction: rtl; unicode-bidi: isolate;
    font-size: 1.15em; line-height: 2; display: inline;
}
.library-content-element hr {
    border: none; height: 1px; margin: 8px auto 20px;
    background: linear-gradient(to right, transparent, var(--book-divider), var(--book-accent-light), var(--book-divider), transparent);
    max-width: 40%;
}
.library-content-element strong { font-weight: 700; color: inherit; }

/* Breadcrumbs & Audio */
.library-chapter-breadcrumb {
    position: sticky; top: 0; z-index: 99; background: var(--breadcrumb-bg); border-bottom: 1px solid var(--book-accent-light);
    border-left: 3px solid var(--book-accent); padding: 10px 16px; margin: -35px -45px 24px; box-shadow: 0 3px 12px rgba(139, 105, 20, 0.1);
    font-size: 0.88rem; font-weight: 600; color: var(--book-accent); transition: opacity 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex; align-items: center; justify-content: space-between; gap: 10px; border-radius: 3px 3px 0 0; opacity: 1;
}
.library-chapter-breadcrumb .breadcrumb-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: var(--book-font-bn); font-style: normal; letter-spacing: 0.2px; color: var(--book-accent); }
.breadcrumb-text { font-size: var(--text-14); color: var(--book-text-light); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.library-audio-btn { background: none; border: none; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; cursor: pointer; color: var(--book-accent); opacity: .6; transition: opacity 0.2s ease, background 0.2s ease; flex-shrink: 0; }
.library-audio-btn:hover { opacity: 1; background: rgba(139, 105, 20, 0.08); }
.library-audio-btn.playing { opacity: 1; background: rgba(139, 105, 20, 0.15); animation: audioPulse 1.5s ease-in-out infinite; }
.library-audio-btn.playing svg { color: var(--book-accent); animation: audioIconBounce 1s ease-in-out infinite; }
.library-audio-btn svg { width: 18px; height: 18px; }
.library-breadcrumb-actions { display: flex; align-items: center; gap: 2px; flex-shrink: 0; }

/* Unified icon button class — apply to all action buttons in breadcrumb */
.library-breadcrumb-actions .bbl-action {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; padding: 0;
  border: none; background: none; cursor: pointer;
  border-radius: var(--radius-full); flex-shrink: 0;
  color: var(--book-accent); opacity: .6;
  font-size: var(--text-18); line-height: 1;
  transition: opacity .2s ease, color .2s ease, background .2s ease;
}
.library-breadcrumb-actions .bbl-action svg,
.library-breadcrumb-actions .bbl-action .mIconn { width: 24px !important; height: 24px !important; filter: none; }
.library-breadcrumb-actions .bbl-action:hover {
  opacity: 1; color: var(--color-secondary); background: rgba(46, 125, 50, 0.1);
}

/* Fallback — keep direct selectors for elements that don't yet have .bbl-action */
.library-breadcrumb-actions .bmk-action-bookmark,
.library-breadcrumb-actions .lib-copy-btn,
.library-breadcrumb-actions .lib-share-btn,
.library-breadcrumb-actions .action-more-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; padding: 0;
  border: none; background: none; cursor: pointer;
  border-radius: var(--radius-full); flex-shrink: 0;
  color: var(--book-accent); opacity: .6; font-size: var(--text-18); line-height: 1;
  transition: opacity .2s ease, color .2s ease, background .2s ease;
}
.library-breadcrumb-actions .bmk-action-bookmark svg,
.library-breadcrumb-actions .lib-copy-btn svg,
.library-breadcrumb-actions .lib-share-btn svg,
.library-breadcrumb-actions .mIconn { width: 18px !important; height: 18px !important; filter: none; }
.library-breadcrumb-actions .bmk-action-bookmark:hover,
.library-breadcrumb-actions .lib-copy-btn:hover,
.library-breadcrumb-actions .lib-share-btn:hover,
.library-breadcrumb-actions .action-more-btn:hover {
  opacity: 1; color: var(--color-secondary); background: rgba(46, 125, 50, 0.1);
}

/* Infinite Scroll Loader */
.library-v2-chapter-content { min-height: 300px; scroll-margin-top: 100px; position: relative; }
.library-infinite-loading, .library-infinite-scroll-loading { text-align: center; padding: 25px; color: var(--book-text-light); font-family: var(--book-font-bn); font-style: italic; font-size: 0.9rem; }
.library-infinite-scroll-loading { opacity: 0; animation: fadeIn 0.3s ease-in forwards; }
.library-delete-content-section { margin-top: 24px !important; padding: 10px !important; background: #fff5f5 !important; border: 1px solid #fecaca !important; border-radius: 6px !important; }

/* Arabic Text Support — AI content_html classes */
/* Full Arabic paragraphs: <p class="ar"> */
.library-content-element p.ar {
    font-family: var(--arabic-font-family) !important;
    font-size: var(--arabic-font-size) !important;
    line-height: var(--arabic-line-height) !important;
    direction: rtl !important;
    text-align: right !important;
    unicode-bidi: isolate;
    text-indent: 0 !important;
    margin: 14px 0 !important;
    color: #1a1a1a;
}
/* Inline Arabic terms: <strong class="ar"> */
.library-content-element strong.ar {
    font-family: var(--arabic-font-family) !important;
    font-size: 1.1em;
    line-height: inherit;
    direction: rtl;
    unicode-bidi: isolate;
    display: inline !important;
    text-indent: 0;
}
/* Blockquote Arabic: <blockquote> > <p class="ar"> */
.library-content-element blockquote p.ar {
    font-size: 1.15em !important;
    margin: 0 0 0.6em !important;
    line-height: 2 !important;
}
/* Legacy selectors for existing non-AI content */
.library-content-element .arabic-text, .library-content-element .rtl-text, .library-content-element [lang="ar"],
.library-content-element [dir="rtl"], .library-content-element p:lang(ar), .library-content-element span:lang(ar),
.library-content-element .arabic {
    font-family: var(--arabic-font-family) !important; direction: rtl !important; text-align: right !important;
    unicode-bidi: bidi-override !important; display: block !important; margin: 14px 0 !important; text-indent: 0 !important;
    font-size: var(--arabic-font-size) !important; line-height: var(--arabic-line-height) !important; color: #1a1a1a;
}

/* Footnote Reference System — inline markers + bottom notes */
.library-content-element sup.fn-ref {
    font-size: 0.7em;
    color: var(--book-accent);
    font-weight: 700;
    cursor: pointer;
    position: relative;
    padding: 0 2px;
    border-bottom: 1px dotted var(--book-accent);
    transition: color 0.2s;
}
.library-content-element sup.fn-ref:hover {
    color: #b8860b;
}
/* Footnote tooltip (shown via JS) */
.library-content-element sup.fn-ref .fn-tooltip {
    display: none;
    position: absolute;
    bottom: 130%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-surface-container-low);
    border: 1px solid var(--book-border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-size: var(--text-sm);
    font-weight: 400;
    line-height: 1.6;
    color: var(--book-text);
    box-shadow: 0 4px 16px rgba(60, 40, 10, 0.15);
    white-space: normal;
    width: max-content;
    max-width: 320px;
    z-index: 100;
    text-align: left;
    direction: ltr;
    font-family: var(--book-font-bn);
}
.library-content-element sup.fn-ref .fn-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--book-border);
}
.library-content-element sup.fn-ref.fn-active .fn-tooltip {
    display: block;
}
/* Footnote notes at bottom */
.library-content-element p.fn-note {
    font-size: 0.85em;
    color: var(--book-text-light);
    margin: 4px 0;
    padding-left: 1.5em;
    text-indent: -1.5em;
    line-height: 1.7;
    border-left: 2px solid var(--book-accent-light);
    padding: 4px 0 4px 12px;
}
.library-content-element p.fn-note sup {
    color: var(--book-accent);
    font-weight: 700;
    margin-right: 4px;
}
/* Inline Arabic text within mixed Bengali+Arabic paragraphs (auto-detected) */
.library-content-element .lib-arabic-inline {
    font-family: var(--arabic-font-family) !important;
    font-size: var(--arabic-font-size) !important;
    line-height: var(--arabic-line-height) !important;
    direction: rtl;
    unicode-bidi: isolate;
    display: inline !important;
    text-indent: 0 !important;
}

/* ==========================================================================
   8. MEDIA QUERIES
   ========================================================================== */
@media (max-width: 768px) {
    /* Header & General */
    #header_main { border-bottom-left-radius: 15px; border-bottom-right-radius: 15px; }
    body { padding-top: 36px; }

    /* Menus paddings & sizes */
    #v2-library-menu .level-1>label, #v2-library-menu .level-2>label, #v2-library-menu .level-3>label,
    #v2-library-menu .level-4>label, #v2-library-menu .level-5>label, #v2-library-menu .level-6>label {
        padding: 8px 12px !important; font-size: var(--text-14) !important; margin-left: 5px !important;
    }
    #v2-library-menu .level-2>label { padding-left: 25px !important; }
    #v2-library-menu .level-3>label { padding-left: 35px !important; }
    #v2-library-menu .level-4>label { padding-left: 45px !important; }
    #v2-library-menu .level-5>label { padding-left: 55px !important; }
    #v2-library-menu .level-6>label { padding-left: 65px !important; }

    /* Sticky Headers */
    #v2-library-menu label.sticky-header.is-sticky,
    #v2-library-menu .level-1>label.sticky-header, #v2-library-menu .level-2>label.sticky-header,
    #v2-library-menu .level-3>label.sticky-header, #v2-library-menu .level-4>label.sticky-header,
    #v2-library-menu .level-5>label.sticky-header, #v2-library-menu .level-6>label.sticky-header {
        padding: 10px 5px !important; font-size: var(--text-14) !important;
    }
    #v2-library-menu .level-1>label.sticky-header { padding: 3px 8px !important; }
    #v2-library-menu .level-2>label.sticky-header { top: 45px !important; }
     #v2-library-menu .level-4>label.sticky-header { top: 105px !important; }
    #v2-library-menu .level-5>label.sticky-header { top: 140px !important; }
    #v2-library-menu .level-6>label.sticky-header { top: 175px !important; }

    /* Book Reader UI */
    #library-book-view { padding: 0; }
    #library-book-view .md-card { padding: 0 2px 20px 2px; margin: 20px 8px; }
    .library-md-card { padding: 10px 14px 24px; margin: 8px 6px 20px; border-radius: 4px; box-shadow: 0 1px 4px var(--book-shadow); }
    .library-chapter-breadcrumb { margin: -10px -14px 18px; padding: 8px 12px; font-size: 0.82rem; border-radius: 3px 3px 0 0; }
    .library-chapter-breadcrumb .breadcrumb-text { white-space: normal; display: flex; flex-direction: column; gap: 1px; min-width: 0; overflow: hidden; }
    .library-chapter-breadcrumb .breadcrumb-text .breadcrumb-separator { display: none; }
    .library-chapter-breadcrumb .breadcrumb-text .breadcrumb-book { font-size: 0.92rem; opacity: 0.75; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .library-chapter-breadcrumb .breadcrumb-text .breadcrumb-chapter { font-size: 1.0rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .library-breadcrumb-actions .lib-copy-btn,
    .library-breadcrumb-actions .lib-share-btn,
    .library-breadcrumb-actions .bmk-action-bookmark { display: none !important; }
    .library-md-card:last-child { margin-bottom: 85px; }
    .library-chapter-title { font-size: 1.2rem; padding: 20px 5px 10px; }
    
    .library-content-element { font-size: var(--library-font-sz, 16.5px); line-height: 1.85; }
    .library-content-element p { text-indent: 1em; }
    .library-content-element p:first-child::first-letter { font-size: 1.8em; }
    .library-chapter-navigation { margin: 16px 8px; gap: 10px; }
    #library-book-view .breadcrumb-text { font-size: var(--text-root); }
}