/* ============================================
   Landing Page Enhancements
   Borrowed from myIB-Quen.html analysis
   - Scroll progress ribbon
   - Feature marquee strip
   - Tabbed AI Tools (Reader Lab)
   - Horizontal book shelf carousel
   ============================================ */

/* ---- 1. SCROLL PROGRESS RIBBON ---- */
#scrollProgressRibbon {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 9999;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent, #f59e0b));
  box-shadow: 0 0 10px color-mix(in srgb, var(--color-primary) 60%, transparent);
  transition: width 0.05s linear;
  pointer-events: none;
}

/* ---- 2. FEATURE MARQUEE STRIP ---- */
.feature-marquee {
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 0;
  overflow: hidden;
  background: color-mix(in srgb, var(--color-primary) 4%, var(--bg-primary));
  position: relative;
}

.feature-marquee-track {
  display: flex;
  gap: 0;
  width: max-content;
  animation: marqueeScroll 32s linear infinite;
}

.feature-marquee:hover .feature-marquee-track {
  animation-play-state: paused;
}

.feature-marquee-track span {
  font-family: var(--font-family-heading, inherit);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-primary);
  padding: 0 22px;
  white-space: nowrap;
  opacity: 0.85;
}

.feature-marquee-track .mq-dot {
  color: var(--color-accent, #f59e0b);
  font-style: normal;
}

@keyframes marqueeScroll {
  to { transform: translateX(-50%); }
}

[dir="rtl"] .feature-marquee-track {
  animation-name: marqueeScrollRtl;
}

@keyframes marqueeScrollRtl {
  to { transform: translateX(50%); }
}

@media (prefers-reduced-motion: reduce) {
  .feature-marquee-track { animation: none; }
}

/* ---- 3. TABBED AI TOOLS (READER LAB) ---- */
.ai-lab-section {
  padding: var(--spacing-3xl) var(--spacing-md);
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .ai-lab-section {
  background: linear-gradient(180deg, #171b28 0%, #1a1f2e 100%);
}

.ai-lab-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(55% 45% at 88% 12%, rgba(37,99,235,0.07) 0%, transparent 70%),
              radial-gradient(50% 45% at 8% 92%, rgba(124,58,237,0.07) 0%, transparent 70%);
  pointer-events: none;
}

.ai-lab-section .container {
  position: relative;
  z-index: 1;
}

.ai-lab-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

/* Split: screenshot + live demo */
.ai-lab-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (min-width: 900px) {
  .ai-lab-split {
    grid-template-columns: 1.4fr 0.6fr;
    gap: 2rem;
  }
}

/* Tab buttons (horizontal bar, scrollable on mobile) */
.ai-lab-tabs {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.ai-lab-tabs::-webkit-scrollbar { display: none; }

.ai-lab-tab {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s, transform 0.3s;
  flex: 1;
  min-width: 180px;
}

[dir="rtl"] .ai-lab-tab { text-align: right; }

[dir="rtl"] .ai-lab-tab {
  text-align: right;
}

.ai-lab-tab:hover {
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--border-color));
  transform: translateY(-2px);
}

.ai-lab-tab.active {
  border-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 8%, var(--bg-primary));
  box-shadow: 0 8px 24px -10px color-mix(in srgb, var(--color-primary) 35%, transparent);
}

.ai-lab-tab-num {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.9rem;
  background: color-mix(in srgb, var(--color-primary) 12%, var(--bg-secondary));
  color: var(--color-primary);
  transition: background 0.3s, color 0.3s;
}

.ai-lab-tab.active .ai-lab-tab-num {
  background: var(--color-primary);
  color: #fff;
}

.ai-lab-tab-text b {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.ai-lab-tab-text small {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 600;
}

/* Stage (demo panel) */
.ai-lab-stage {
  border: 1px solid var(--border-color);
  border-radius: 18px;
  overflow: hidden;
  background: var(--bg-primary);
  box-shadow: 0 16px 48px -16px rgba(0,0,0,0.12);
}

[data-theme="dark"] .ai-lab-stage {
  box-shadow: 0 16px 48px -16px rgba(0,0,0,0.4);
}

/* Top bar (mock browser chrome) */
.ai-lab-stage-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.ai-lab-stage-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.ai-lab-stage-dot:nth-child(1) { background: #ef4444; }
.ai-lab-stage-dot:nth-child(2) { background: #f59e0b; }
.ai-lab-stage-dot:nth-child(3) { background: #22c55e; }

.ai-lab-stage-title {
  margin-left: 10px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

[dir="rtl"] .ai-lab-stage-title {
  margin-left: 0;
  margin-right: 10px;
}

/* Passage display */
.ai-lab-passage {
  margin: 18px;
  padding: 24px 28px;
  border-radius: 12px;
  background: linear-gradient(180deg, #fefcf5 0%, #f8f2e4 100%);
  color: #33291c;
  font-size: 0.95rem;
  line-height: 1.85;
  box-shadow: inset 0 2px 10px rgba(90,60,20,0.1);
  position: relative;
  user-select: text;
  cursor: text;
}

[data-theme="dark"] .ai-lab-passage {
  background: linear-gradient(180deg, #1e1b16 0%, #1a1612 100%);
  color: #e6dcc8;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.2);
}

[dir="rtl"] .ai-lab-passage {
  direction: rtl;
  text-align: right;
}

.ai-lab-passage .lab-word {
  border-radius: 3px;
  padding: 0 1px;
  transition: background 0.15s, color 0.15s;
}

.ai-lab-passage .lab-word.highlight {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 0 2px var(--color-primary);
}

/* Controls area */
.ai-lab-controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  padding: 0 18px 8px;
}

.ai-lab-controls input[type="text"] {
  flex: 1;
  min-width: 180px;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.2s;
}

.ai-lab-controls input[type="text"]:focus {
  border-color: var(--color-primary);
}

.ai-lab-controls select {
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.88rem;
  outline: none;
  cursor: pointer;
}

.ai-lab-controls .btn {
  white-space: nowrap;
}

.ai-lab-hint {
  padding: 0 18px 10px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Equalizer animation for Listen */
.ai-lab-eq {
  display: none;
  align-items: flex-end;
  gap: 3px;
  height: 16px;
}

.ai-lab-eq.playing {
  display: inline-flex;
}

.ai-lab-eq i {
  width: 3px;
  background: var(--color-primary);
  border-radius: 1px;
  animation: eqBounce 0.7s ease-in-out infinite;
}

.ai-lab-eq i:nth-child(2) { animation-delay: 0.15s; }
.ai-lab-eq i:nth-child(3) { animation-delay: 0.3s; }
.ai-lab-eq i:nth-child(4) { animation-delay: 0.45s; }

@keyframes eqBounce {
  0%, 100% { height: 4px; }
  50% { height: 15px; }
}

/* Result panel */
.ai-lab-result {
  margin: 12px 18px 18px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: color-mix(in srgb, var(--color-primary) 4%, var(--bg-secondary));
  padding: 16px 18px;
  min-height: 60px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-secondary);
  transition: border-color 0.3s;
}

.ai-lab-result.has-response {
  border-color: color-mix(in srgb, var(--color-primary) 30%, var(--border-color));
}

.ai-lab-result-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.ai-lab-result-tag::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 8px color-mix(in srgb, var(--color-primary) 80%, transparent);
  animation: labPulse 1.6s ease-in-out infinite;
}

@keyframes labPulse {
  50% { opacity: 0.35; }
}

[dir="rtl"] .ai-lab-result {
  direction: rtl;
  text-align: right;
}

/* CTA below the lab */
.ai-lab-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  text-align: center;
  margin-top: 2.5rem;
  padding: 28px 24px;
  border: 1px dashed var(--border-color);
  border-radius: 16px;
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

/* Screenshot panel (real reader UI) */
.ai-lab-shot-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: sticky;
  top: 90px;
  align-self: start;
}

.ai-lab-shot-label {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  align-self: flex-start;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  padding: 5px 12px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--color-primary) 8%, var(--bg-primary));
  border: 1px solid color-mix(in srgb, var(--color-primary) 20%, var(--border-color));
}

/* Frame is now a button (click to enlarge) */
.ai-lab-shot-frame {
  position: relative;
  display: block;
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  box-shadow: 0 16px 44px -18px rgba(0,0,0,0.25);
  padding: 8px;
  cursor: zoom-in;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.ai-lab-shot-frame:hover {
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--border-color));
  box-shadow: 0 22px 50px -18px color-mix(in srgb, var(--color-primary) 35%, rgba(0,0,0,0.3));
  transform: translateY(-2px);
}

[data-theme="dark"] .ai-lab-shot-frame {
  box-shadow: 0 16px 44px -18px rgba(0,0,0,0.5);
}

.ai-lab-shot-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  transition: opacity 0.3s ease;
}

.ai-lab-shot-frame.swapping img {
  opacity: 0;
}

/* Expand affordance */
.ai-lab-shot-expand {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg-primary) 85%, transparent);
  border: 1px solid var(--border-color);
  color: var(--color-primary);
  backdrop-filter: blur(6px);
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

[dir="rtl"] .ai-lab-shot-expand { right: auto; left: 16px; }

.ai-lab-shot-frame:hover .ai-lab-shot-expand {
  opacity: 1;
  transform: scale(1);
}

@media (max-width: 899px) {
  .ai-lab-shot-panel {
    position: static;
    top: auto;
    max-width: 420px;
    margin: 0 auto;
    width: 100%;
  }
  /* On mobile the expand hint is always visible (no hover) */
  .ai-lab-shot-expand { opacity: 1; transform: scale(1); }
}

/* Lightbox */
.ai-lab-lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 4vw;
  background: rgba(0,0,0,0.82);
  backdrop-filter: blur(6px);
  animation: labLightboxIn 0.25s ease;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.ai-lab-lightbox[hidden] { display: none; }

@keyframes labLightboxIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.ai-lab-lightbox img {
  width: auto;
  max-width: min(1000px, 100%);
  height: auto;
  margin: auto;
  border-radius: 12px;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.7);
  animation: labLightboxZoom 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes labLightboxZoom {
  from { transform: scale(0.98); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.ai-lab-lightbox-close {
  position: fixed;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

[dir="rtl"] .ai-lab-lightbox-close { right: auto; left: 24px; }

.ai-lab-lightbox-close:hover {
  background: rgba(255,255,255,0.22);
  transform: rotate(90deg);
}

@media (prefers-reduced-motion: reduce) {
  .ai-lab-lightbox, .ai-lab-lightbox img { animation: none; }
  .ai-lab-shot-frame:hover { transform: none; }
}

/* ---- 4. HORIZONTAL BOOK SHELF CAROUSEL ---- */
.book-shelf-section {
  padding: var(--spacing-3xl) var(--spacing-md);
  background: color-mix(in srgb, var(--color-primary) 3%, var(--bg-secondary));
}

.book-shelf-header {
  display: flex;
  align-items: flex-end;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  max-width: 1300px;
  margin-left: auto;
  margin-right: auto;
}

.book-shelf-header .section-header {
  margin-bottom: 0;
  text-align: left;
  flex: 1;
}

[dir="rtl"] .book-shelf-header .section-header {
  text-align: right;
}

.book-shelf-nav {
  display: flex;
  gap: 8px;
}

.book-shelf-nav-btn {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1.1rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 0.25s, border-color 0.25s, color 0.25s, transform 0.25s;
}

.book-shelf-nav-btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  transform: scale(1.05);
}

[dir="rtl"] .book-shelf-nav-btn svg {
  transform: scaleX(-1);
}

/* Scrollable track */
.book-shelf-track {
  display: flex;
  gap: 22px;
  overflow-x: auto;
  padding: 24px 8px 44px;
  scroll-snap-type: x mandatory;
  cursor: grab;
  scrollbar-width: none;
  -ms-overflow-style: none;
  max-width: 1300px;
  margin: 0 auto;
  position: relative;
}

.book-shelf-track::-webkit-scrollbar { display: none; }

.book-shelf-track.dragging {
  cursor: grabbing;
  scroll-snap-type: none;
}

/* Shadow "shelf" effect */
.book-shelf-track::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 18px;
  height: 12px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--color-primary) 10%, transparent), transparent);
  border-radius: 50%;
  filter: blur(5px);
  pointer-events: none;
}

/* Individual book card */
.book-shelf-item {
  flex: 0 0 200px;
  scroll-snap-align: start;
  position: relative;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.book-shelf-item:hover {
  transform: translateY(-12px) rotate(-1deg);
}

.book-shelf-item .book-cover {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: 6px 12px 12px 6px;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.15);
  box-shadow: 0 18px 40px -12px rgba(0,0,0,0.4);
}

/* Spine edge effect */
.book-shelf-item .book-cover::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 12px;
  background: linear-gradient(90deg, rgba(0,0,0,0.4), rgba(255,255,255,0.12) 45%, rgba(0,0,0,0.2));
  z-index: 3;
  pointer-events: none;
}

[dir="rtl"] .book-shelf-item .book-cover::before {
  left: auto;
  right: 0;
  background: linear-gradient(-90deg, rgba(0,0,0,0.4), rgba(255,255,255,0.12) 45%, rgba(0,0,0,0.2));
}

.book-shelf-item .book-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.book-shelf-item:hover .book-cover img {
  transform: scale(1.05);
}

/* Info overlay at bottom of cover */
.book-shelf-item .book-info-overlay {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  padding: 40px 12px 12px;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.85) 55%);
}

.book-shelf-item .book-info-overlay h4 {
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
  margin: 0;
}

.book-shelf-item .book-info-overlay .book-author {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 3px;
}

/* Language tag */
.book-shelf-item .book-lang-tag {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 3;
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(0,0,0,0.7);
  border: 1px solid rgba(255,255,255,0.15);
  color: #fff;
  backdrop-filter: blur(4px);
}

[dir="rtl"] .book-shelf-item .book-lang-tag {
  right: auto;
  left: 10px;
}

/* Hover "Read Now" button */
.book-shelf-item .book-read-cta {
  position: absolute;
  left: 50%;
  top: 42%;
  transform: translate(-50%, -50%) scale(0.85);
  z-index: 4;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.book-shelf-item:hover .book-read-cta {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* Read pill — matches the dashboard/library "Smart Read" button, sized down */
.shelf-read-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.95);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2px;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.28);
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.shelf-read-pill svg { flex-shrink: 0; }

.shelf-read-pill:hover {
  background: rgb(59, 130, 246);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

/* Description below cover */
.book-shelf-item .book-desc {
  font-size: 0.76rem;
  color: var(--text-secondary);
  margin-top: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  padding: 0 4px;
  line-height: 1.5;
}

/* Responsive shelf items */
@media (max-width: 640px) {
  .book-shelf-item { flex: 0 0 160px; }
}

@media (prefers-reduced-motion: reduce) {
  .book-shelf-item:hover { transform: none; }
  .feature-marquee-track { animation: none; }
}

/* Lab loading spinner (inline) */
.lab-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border-color);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: labSpin 0.7s linear infinite;
}

@keyframes labSpin {
  to { transform: rotate(360deg); }
}


/* ---- 5. LIBRA INTERACTIVE CHAT MOCK ---- */
.libra-chat-mock {
  border: 1px solid var(--border-color);
  border-radius: 18px;
  overflow: hidden;
  background: var(--bg-primary);
  box-shadow: 0 16px 48px -16px rgba(0,0,0,0.18);
  display: flex;
  flex-direction: column;
  height: 380px;
  min-width: 0;
  flex: 1;
  max-width: 480px;
}

[data-theme="dark"] .libra-chat-mock {
  background: var(--bg-secondary);
  box-shadow: 0 16px 48px -16px rgba(0,0,0,0.5);
}

.libra-chat-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-color);
  background: color-mix(in srgb, var(--color-primary) 4%, var(--bg-secondary));
}

.libra-chat-online {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
}

.libra-chat-head b { font-size: 0.9rem; color: var(--text-primary); }
.libra-chat-head small {
  margin-inline-start: auto;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.libra-chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.libra-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.88rem;
  line-height: 1.6;
  animation: fadeSlideUp 0.4s ease;
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.libra-msg-bot {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
  align-self: flex-start;
}

[dir="rtl"] .libra-msg-bot {
  border-bottom-left-radius: 14px;
  border-bottom-right-radius: 4px;
}

.libra-msg-user {
  background: linear-gradient(135deg, var(--color-primary), #6366f1);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

[dir="rtl"] .libra-msg-user {
  border-bottom-right-radius: 14px;
  border-bottom-left-radius: 4px;
}

/* Book recommendation card inside chat */
.libra-rec {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 8px;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: color-mix(in srgb, var(--color-primary) 5%, var(--bg-primary));
}

.libra-rec-emoji {
  width: 42px;
  height: 56px;
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  background: linear-gradient(135deg, color-mix(in srgb, var(--color-primary) 15%, var(--bg-secondary)), var(--bg-secondary));
  flex-shrink: 0;
}

.libra-rec b {
  display: block;
  font-size: 0.85rem;
  color: var(--color-primary);
}

.libra-rec small {
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* Typing indicator */
.libra-typing {
  display: inline-flex;
  gap: 4px;
  padding: 12px 16px;
  align-self: flex-start;
}

.libra-typing i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: libraTypingBounce 1s infinite;
}

.libra-typing i:nth-child(2) { animation-delay: 0.18s; }
.libra-typing i:nth-child(3) { animation-delay: 0.36s; }

@keyframes libraTypingBounce {
  0%, 100% { opacity: 0.25; transform: translateY(0); }
  50% { opacity: 1; transform: translateY(-4px); }
}

/* Chips in chat */
.libra-chat-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 0 16px 10px;
}

.libra-cchip {
  border: 1px solid var(--border-color);
  background: none;
  color: var(--color-primary);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, color 0.2s;
}

.libra-cchip:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-1px);
}

/* Input row */
.libra-chat-input-row {
  display: flex;
  gap: 8px;
  padding: 12px 14px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.libra-chat-input-row input {
  flex: 1;
  padding: 9px 14px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
  min-width: 0;
}

.libra-chat-input-row input:focus {
  border-color: var(--color-primary);
}

/* Layout adjustment: make libra-band a grid on desktop */
@media (min-width: 900px) {
  .libra-band {
    display: grid !important;
    grid-template-columns: auto 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
  }
}

@media (max-width: 899px) {
  .libra-chat-mock {
    max-width: 100%;
    height: 350px;
  }
}


/* ---- 6. AI STUDIO CARD IMAGE OVERLAYS ---- */

/* Comic speech bubbles */
.ai-studio-overlay-bubble {
  position: absolute;
  z-index: 3;
  background: #fff;
  color: #1a1a1a;
  font-size: 0.6rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  padding: 5px 10px;
  border-radius: 10px;
  border: 2px solid #1a1a1a;
  box-shadow: 2px 3px 0 #1a1a1a;
  text-align: center;
  line-height: 1.2;
  pointer-events: none;
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.ai-studio-card:hover .ai-studio-overlay-bubble {
  opacity: 1;
  transform: scale(1);
}

.ai-studio-bub-1 {
  top: 12%;
  left: 8%;
  transition-delay: 0.1s;
}

.ai-studio-bub-2 {
  top: 28%;
  right: 10%;
  transition-delay: 0.25s;
}

/* Social post quote overlay */
.ai-studio-overlay-quote {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 70%;
  text-align: center;
  font-style: italic;
  font-size: 0.72rem;
  line-height: 1.5;
  color: rgba(255,255,255,0.95);
  text-shadow: 0 2px 8px rgba(0,0,0,0.6);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.ai-studio-overlay-quote em {
  display: block;
  font-size: 0.65rem;
  margin-top: 4px;
  color: rgba(255,255,255,0.75);
  font-style: normal;
  font-weight: 700;
}

.ai-studio-card:hover .ai-studio-overlay-quote {
  opacity: 1;
}

@media (max-width: 640px) {
  .ai-studio-overlay-bubble,
  .ai-studio-overlay-quote {
    display: none;
  }
}