/**
 * RhyRhy English - Navigation & App Shell Styles
 */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: var(--nav-bg, rgba(15, 23, 42, 0.94));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--surface-border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

[data-theme="light"] .main-nav {
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  height: var(--nav-height);
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 12px;
  width: 100%;
  box-sizing: border-box;
}

/* Brand */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 2px 12px var(--primary-glow);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.brand-logo:hover {
  transform: scale(1.05);
}

.brand-logo svg {
  width: 100%;
  height: 100%;
  display: block;
}

.brand-text-wrap {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.brand-name {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  white-space: nowrap;
}

.brand-name strong,
.brand-english {
  color: var(--primary-light);
  font-weight: 800;
  display: inline;
}

.nav-beta-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 7px;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, rgba(236, 72, 153, 0.2), rgba(99, 102, 241, 0.25));
  border: 1px solid rgba(236, 72, 153, 0.45);
  color: #F472B6;
  line-height: 1.2;
  box-shadow: 0 0 10px rgba(236, 72, 153, 0.25);
  user-select: none;
  white-space: nowrap;
}

[data-theme="light"] .nav-beta-tag {
  background: rgba(236, 72, 153, 0.1);
  border-color: rgba(219, 39, 119, 0.35);
  color: #BE185D;
  box-shadow: none;
}

/* Lesson Switcher Dropdown */
.nav-lesson-dropdown {
  position: relative;
}

.btn-lesson-menu {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 38px;
  padding: 6px 14px;
  background-color: var(--surface-color);
  border: 1.5px solid var(--surface-border);
  border-radius: var(--radius-full);
  color: var(--text-main);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.btn-lesson-menu:hover {
  background-color: var(--surface-color-alt);
  border-color: var(--primary-light);
  transform: translateY(-1px);
}

.lesson-btn-icon {
  font-size: 1.15rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lesson-menu-label {
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.dropdown-chevron {
  flex-shrink: 0;
  transition: transform 0.2s ease;
  color: var(--text-muted);
}

.nav-lesson-dropdown:hover .dropdown-chevron,
.btn-lesson-menu[aria-expanded="true"] .dropdown-chevron {
  transform: rotate(180deg);
  color: var(--primary-light);
}

.lesson-menu-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  width: 320px;
  max-width: calc(100vw - 24px);
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border-hover);
  border-radius: var(--radius-lg);
  padding: 8px;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.65), 0 0 24px var(--primary-glow);
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 120;
}

[data-theme="light"] .lesson-menu-dropdown {
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.12), 0 0 18px var(--primary-glow);
}

.lesson-menu-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.lesson-dropdown-header {
  padding: 8px 12px;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--surface-border);
  margin-bottom: 6px;
}

.lesson-dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--text-main);
  text-decoration: none;
  transition: background-color 0.15s ease;
  margin-bottom: 4px;
}

.lesson-dropdown-item:last-child {
  margin-bottom: 0;
}

.lesson-dropdown-item:hover {
  background-color: var(--surface-color-alt);
}

.lesson-dropdown-item.active {
  background: var(--primary-glow);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.dropdown-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.dropdown-item-icon {
  font-size: 1.35rem;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-color);
  border: 1px solid var(--surface-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.dropdown-item-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.dropdown-item-title-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  line-height: 1.3;
}

.dropdown-item-title-row strong {
  color: var(--text-main);
}

.dropdown-item-topic {
  font-size: 0.76rem;
  color: var(--primary-light);
  font-weight: 600;
}

.dropdown-item-subtitle {
  font-size: 0.74rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 165px;
}

.dropdown-item-status {
  flex-shrink: 0;
}

.status-done {
  font-size: 0.75rem;
  color: var(--accent-emerald);
  font-weight: 700;
  background: var(--accent-emerald-glow);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.status-prog {
  font-size: 0.75rem;
  color: var(--text-muted);
  background-color: var(--bg-color);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* Right Actions */
.nav-right-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-nav-action {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 6px 14px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  flex-shrink: 0;
}

.btn-nav-action:hover:not(.disabled) {
  background-color: var(--surface-color);
  color: var(--text-main);
}

.btn-nav-action.active {
  background: rgba(99, 102, 241, 0.16);
  border-color: rgba(99, 102, 241, 0.4);
  color: var(--primary-light);
}

/* Popcorn, Lessons & Saved Navbar Action Icons (Issue #44) */
.btn-nav-popcorn,
.btn-nav-lessons,
.btn-nav-saved {
  position: relative;
}

.nav-btn-icon {
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.btn-nav-popcorn .nav-popcorn-icon {
  font-size: 1.45rem;
}

.btn-nav-lessons .nav-lessons-icon {
  font-size: 1.35rem;
}

.btn-nav-saved .nav-saved-icon {
  font-size: 1.35rem;
}

.btn-nav-popcorn:hover .nav-popcorn-icon {
  transform: scale(1.22) rotate(-8deg);
}

.btn-nav-lessons:hover .nav-lessons-icon {
  transform: scale(1.2) rotate(6deg);
}

.btn-nav-saved:hover .nav-saved-icon {
  transform: scale(1.2) rotate(-6deg);
}

.btn-nav-popcorn.active {
  background: rgba(245, 158, 11, 0.16);
  border-color: rgba(245, 158, 11, 0.4);
  color: #F59E0B;
}

.btn-nav-action.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  background-color: var(--primary);
  color: #FFFFFF;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
}

/* Red Badge for New Lesson on Navigation Bar */
.nav-badge-red {
  background-color: #EF4444;
  color: #FFFFFF;
  font-weight: 800;
  font-size: 0.68rem;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.45);
  animation: pulseRedBadge 2.2s infinite ease-in-out;
}

[data-theme="light"] .nav-badge-red {
  background-color: #DC2626;
  color: #FFFFFF;
  box-shadow: 0 2px 6px rgba(220, 38, 38, 0.35);
}

@keyframes pulseRedBadge {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 2px 6px rgba(239, 68, 68, 0.4);
  }
  50% {
    transform: scale(1.08);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.7);
  }
}

/* Theme Toggle Button */
.btn-theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border-radius: var(--radius-full);
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.btn-theme-toggle:hover {
  background-color: var(--surface-color-alt);
  border-color: var(--surface-border-hover);
  transform: translateY(-1px) scale(1.05);
  box-shadow: var(--shadow-md);
}

.btn-theme-toggle:active {
  transform: translateY(0) scale(0.96);
}

.theme-icon-sun,
.theme-icon-moon {
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.2s ease;
}

/* Light theme: show Moon icon to switch to Dark */
[data-theme="light"] .theme-icon-sun {
  display: none !important;
}
[data-theme="light"] .theme-icon-moon {
  display: flex !important;
  color: #4F46E5;
}

/* Dark theme: show Sun icon to switch to Light */
:root:not([data-theme="light"]) .theme-icon-sun,
[data-theme="dark"] .theme-icon-sun {
  display: flex !important;
  color: #F59E0B;
}
:root:not([data-theme="light"]) .theme-icon-moon,
[data-theme="dark"] .theme-icon-moon {
  display: none !important;
}

.history-unlocked-dot {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-full);
  background-color: var(--accent-emerald);
  position: absolute;
  top: 8px;
  right: 6px;
}

/* Offline Banner */
.offline-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  background-color: #92400E;
  color: #FEF3C7;
  font-size: 0.82rem;
  font-weight: 500;
  text-align: center;
}

/* Drawers */
.app-drawer {
  position: fixed;
  inset: 0;
  z-index: 200;
  visibility: hidden;
  pointer-events: none;
  transition: visibility 0.3s;
}

.app-drawer.open {
  visibility: visible;
  pointer-events: auto;
}

.drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

[data-theme="light"] .drawer-backdrop {
  background: rgba(15, 23, 42, 0.45);
}

.app-drawer.open .drawer-backdrop {
  opacity: 1;
  pointer-events: auto;
}

.drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 420px;
  background-color: var(--surface-color);
  border-left: 1px solid var(--surface-border);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.app-drawer.open .drawer-panel {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px 0;
  border-bottom: 1px solid var(--surface-border);
}

.drawer-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
}

.drawer-title-group h3 {
  font-size: 1.15rem;
}

.btn-drawer-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-drawer-close:hover {
  background-color: var(--surface-color-alt);
  color: var(--text-main);
}

.drawer-body {
  position: relative;
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  .drawer-body {
    scroll-behavior: auto;
  }
}

.drawer-empty-state {
  text-align: center;
  padding: 40px 20px;
}

.empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.drawer-empty-state h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.drawer-empty-state p {
  font-size: 0.88rem;
  line-height: 1.6;
}

/* Saved Sentences List */
.saved-lesson-group {
  margin-bottom: 16px;
}

.saved-lesson-group:last-child {
  margin-bottom: calc(70vh);
}

.group-lesson-title {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary-light);
  margin-bottom: 8px;
  font-weight: 700;
}

.group-lesson-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-light);
  text-decoration: none;
  transition: all 0.18s ease;
}

.group-lesson-link:hover {
  color: var(--text-main);
  transform: translateX(2px);
}

/* Saved Sentence Cards in Drawer */
.saved-sentence-card {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  background-color: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 12px 14px;
  margin-bottom: 10px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.2s ease,
              box-shadow 0.2s ease,
              background-color 0.2s ease;
}

.saved-sentence-card:hover {
  border-color: var(--surface-border-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .saved-sentence-card {
  background-color: #FFFFFF;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

[data-theme="light"] .saved-sentence-card:hover {
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.08);
}

.saved-sentence-card.is-playing {
  border-color: var(--primary) !important;
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.14) 0%, rgba(30, 41, 59, 0.95) 100%) !important;
  box-shadow: 0 0 20px var(--primary-glow) !important;
}

[data-theme="light"] .saved-sentence-card.is-playing {
  border-color: var(--primary) !important;
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.08) 0%, #FFFFFF 100%) !important;
  box-shadow: 0 4px 18px rgba(79, 70, 229, 0.12) !important;
}

.saved-sentence-card.is-playing::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 4px;
  background: linear-gradient(180deg, var(--accent-emerald), var(--primary-light));
  border-radius: 0 3px 3px 0;
}

/* Card Play Button (Fixed compact size so it never stretches on mobile or distorts on desktop) */
.saved-sentence-card .btn-card-play,
.btn-saved-card-play {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  width: 28px !important;
  height: 28px !important;
  min-width: 28px !important;
  max-width: 28px !important;
  flex: 0 0 28px !important;
  border-radius: var(--radius-full) !important;
  background: var(--surface-color-alt, rgba(255, 255, 255, 0.06)) !important;
  border: 1px solid var(--surface-border) !important;
  color: var(--primary-light) !important;
  cursor: pointer !important;
  margin: 0 !important;
  margin-top: 2px !important;
  padding: 0 !important;
  box-sizing: border-box !important;
  flex-shrink: 0 !important;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

[data-theme="light"] .saved-sentence-card .btn-card-play,
[data-theme="light"] .btn-saved-card-play {
  background: #EEF2FF !important;
  border-color: #C7D2FE !important;
  color: #4F46E5 !important;
}

.saved-sentence-card .btn-card-play:hover,
.btn-saved-card-play:hover {
  background: var(--primary) !important;
  color: #FFFFFF !important;
  border-color: var(--primary) !important;
  transform: scale(1.08) !important;
}

.saved-sentence-card.is-playing .btn-card-play,
.saved-sentence-card.is-playing .btn-saved-card-play {
  background: var(--primary) !important;
  color: #FFFFFF !important;
  border-color: var(--primary-light) !important;
  box-shadow: 0 0 10px var(--primary-glow) !important;
}

.saved-sentence-card .btn-card-play .icon-card-play {
  width: 13px !important;
  height: 13px !important;
  margin-left: 1.5px !important;
  display: block;
}

.saved-sentence-card .btn-card-play .icon-card-pause {
  width: 13px !important;
  height: 13px !important;
}

.saved-card-text {
  flex: 1 1 auto;
  min-width: 0;
  word-break: break-word;
}

.saved-card-text .saved-en {
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.52;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.saved-card-text .saved-kr {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.45;
}

/* Vocabulary Expression Highlight (Step 4 Review Parity) */
.quiz-vocab-highlight {
  background: rgba(99, 102, 241, 0.24);
  color: #A5B4FC;
  border: 1px solid rgba(99, 102, 241, 0.45);
  border-radius: 4px;
  padding: 1px 6px;
  font-weight: 700;
  display: inline-block;
  line-height: 1.35;
}

[data-theme="light"] .quiz-vocab-highlight {
  color: #4338CA;
  background: rgba(99, 102, 241, 0.12);
  border-color: rgba(99, 102, 241, 0.3);
}

/* Saved Popcorn Expression Highlight */

.saved-lesson-group[data-lesson="popcorn"] .quiz-vocab-highlight,
.saved-lesson-group[data-lesson="popcorn"] .popcorn-highlight {
  background: rgba(245, 158, 11, 0.22);
  color: #B45309;
  border: 1px solid rgba(245, 158, 11, 0.45);
  border-radius: 4px;
  padding: 1px 6px;
  font-weight: 800;
}

[data-theme="dark"] .saved-lesson-group[data-lesson="popcorn"] .quiz-vocab-highlight,
[data-theme="dark"] .saved-lesson-group[data-lesson="popcorn"] .popcorn-highlight {
  background: rgba(245, 158, 11, 0.32);
  color: #FDE68A;
  border-color: rgba(245, 158, 11, 0.55);
}

.btn-delete-sentence {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  min-width: 28px;
  max-width: 28px;
  flex: 0 0 28px;
  flex-shrink: 0;
  background: transparent;
  border: none;
  color: var(--text-subtle);
  cursor: pointer;
  padding: 0;
  margin: 0;
  margin-top: 2px;
  border-radius: var(--radius-full);
  transition: all 0.2s ease;
}

.btn-delete-sentence:hover {
  color: #EF4444;
  background: rgba(239, 68, 68, 0.12);
  transform: scale(1.08);
}

/* History Timeline */
.history-item-card {
  background-color: var(--bg-color);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 12px;
}

.history-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.history-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-emerald);
}

.history-date {
  font-size: 0.75rem;
  color: var(--text-subtle);
}

.history-title {
  font-size: 1rem;
  color: var(--text-main);
  margin-bottom: 12px;
}

/* ==========================================================================
   All Lessons Catalog Section (Cards View)
   ========================================================================== */
.lessons-catalog-section {
  padding: 44px 0 64px;
  scroll-margin-top: 80px;
}

.section-header-catalog {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 36px;
}

.catalog-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-full);
  color: var(--primary-light);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.catalog-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.catalog-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
  word-break: keep-all;
}

.lessons-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.lesson-catalog-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--surface-color);
  border: 1.5px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.25);
  color: inherit;
}

[data-theme="light"] .lesson-catalog-card {
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.07);
}

.lesson-catalog-card.completed {
  border-color: rgba(16, 185, 129, 0.45);
}

.lesson-catalog-card.completed::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 20px;
  right: 20px;
  height: 3px;
  background: linear-gradient(90deg, #10B981, #34D399);
  border-radius: var(--radius-full);
}

[data-theme="light"] .lesson-catalog-card.completed {
  border-color: rgba(5, 150, 105, 0.4);
}

.lesson-catalog-card.in-progress {
  border-color: rgba(99, 102, 241, 0.4);
}

.lesson-catalog-card.in-progress::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 20px;
  right: 20px;
  height: 3px;
  background: linear-gradient(90deg, #6366F1, #818CF8);
  border-radius: var(--radius-full);
}

[data-theme="light"] .lesson-catalog-card.in-progress {
  border-color: rgba(99, 102, 241, 0.35);
}

.lesson-catalog-card.coming-soon {
  border-color: rgba(245, 158, 11, 0.4);
}

.lesson-catalog-card.coming-soon::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 20px;
  right: 20px;
  height: 3px;
  background: linear-gradient(90deg, #F59E0B, #FBBF24);
  border-radius: var(--radius-full);
}

[data-theme="light"] .lesson-catalog-card.coming-soon {
  border-color: rgba(217, 119, 6, 0.35);
}

.lesson-catalog-card.coming-soon:hover {
  border-color: #F59E0B;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.45), 0 0 24px rgba(245, 158, 11, 0.25);
}

[data-theme="light"] .lesson-catalog-card.coming-soon:hover {
  border-color: #D97706;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.12), 0 0 18px rgba(217, 119, 6, 0.2);
}

/* ==========================================================================
   Coming Soon Banner (Lesson Page Notification)
   ========================================================================== */
.coming-soon-banner {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(245, 158, 11, 0.1);
  border: 1.5px solid rgba(245, 158, 11, 0.35);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 18px;
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: all 0.2s ease;
}

[data-theme="light"] .coming-soon-banner {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(217, 119, 6, 0.3);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.05);
}

.coming-soon-banner-icon {
  font-size: 1.6rem;
  line-height: 1;
  flex-shrink: 0;
}

.coming-soon-banner-text {
  flex: 1;
  min-width: 0;
}

.coming-soon-banner-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: #FBBF24;
  margin-bottom: 3px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

[data-theme="light"] .coming-soon-banner-title {
  color: #B45309;
}

.coming-soon-banner-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.coming-soon-badge-pill {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(245, 158, 11, 0.2);
  color: #FDE68A;
  border: 1px solid rgba(245, 158, 11, 0.4);
}

[data-theme="light"] .coming-soon-badge-pill {
  background: rgba(217, 119, 6, 0.15);
  color: #92400E;
  border-color: rgba(217, 119, 6, 0.3);
}

@media (max-width: 640px) {
  .coming-soon-banner {
    padding: 12px 14px;
    gap: 10px;
  }
  .coming-soon-banner-title {
    font-size: 0.9rem;
  }
  .coming-soon-banner-desc {
    font-size: 0.8rem;
  }
}

.lesson-catalog-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-light);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.45), 0 0 24px var(--primary-glow);
}

[data-theme="light"] .lesson-catalog-card:hover {
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.12), 0 0 18px var(--primary-glow);
}

.lesson-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.lesson-card-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.lesson-card-icon {
  font-size: 2.2rem;
  line-height: 1;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--bg-color);
  border: 1.5px solid var(--surface-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .lesson-card-icon {
  background: var(--surface-color-alt);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
}

.lesson-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.35;
}

.lesson-card-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 18px;
  word-break: keep-all;
}

.lesson-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 14px;
  border-top: 1px solid var(--surface-border);
  margin-bottom: 20px;
  font-size: 0.8rem;
  color: var(--text-subtle);
}

.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.lesson-card-btn {
  width: 100%;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
}

/* ==========================================================================
   Mobile Responsive Navigation & Cards
   ========================================================================== */
@media (max-width: 640px) {
  .nav-inner {
    padding: 0 12px;
    gap: 8px;
  }

  .brand-logo {
    width: 36px;
    height: 36px;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  /* On mobile: Show brand name with "RhyRhy" only; hide "English" */
  .brand-english {
    display: none !important;
  }

  /* Make BETA sign slightly smaller on mobile view */
  .nav-beta-tag {
    font-size: 0.52rem;
    padding: 1.5px 5px;
    letter-spacing: 0.02em;
    line-height: 1.1;
  }

  /* On mobile: Hide all button text labels and show ONLY icons! */
  .nav-btn-label {
    display: none !important;
  }

  .nav-right-actions {
    gap: 6px;
  }

  .btn-nav-action {
    padding: 0;
    width: 38px;
    height: 38px;
    min-width: 38px;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--surface-color-alt);
  }

  .btn-nav-action:hover {
    background: var(--surface-color);
  }

  .nav-btn-icon {
    font-size: 1.35rem;
  }

  .btn-nav-popcorn .nav-popcorn-icon {
    font-size: 1.42rem;
  }

  .btn-nav-lessons .nav-lessons-icon {
    font-size: 1.32rem;
  }

  .btn-nav-saved .nav-saved-icon {
    font-size: 1.32rem;
  }

  .nav-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    min-width: 16px;
    height: 16px;
    font-size: 0.65rem;
    padding: 0 3px;
  }


  .history-unlocked-dot {
    top: 4px;
    right: 4px;
  }

  .lessons-cards-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .catalog-title {
    font-size: 1.75rem;
  }
}

@media (max-width: 340px) {
  .brand-name {
    display: none;
  }

  .nav-right-actions {
    gap: 4px;
  }
}

/* ==========================================================================
   App Footer & Creative Commons (CC BY 4.0) License Styles
   ========================================================================== */
.app-footer {
  background-color: var(--surface-color);
  border-top: 1px solid var(--surface-border);
  padding: 48px 20px 40px;
  margin-top: 64px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-logo-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-logo-icon {
  font-size: 1.25rem;
}

.footer-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.footer-badge {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  background: rgba(99, 102, 241, 0.18);
  color: #A5B4FC;
  border: 1px solid rgba(99, 102, 241, 0.35);
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

[data-theme="light"] .footer-badge {
  background: rgba(99, 102, 241, 0.1);
  color: #4338CA;
  border-color: rgba(99, 102, 241, 0.25);
}

.footer-tagline {
  font-size: 0.88rem;
  color: var(--text-subtle);
}

.footer-license-box {
  display: flex;
  align-items: center;
}

.cc-license-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  color: var(--text-main);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.cc-license-badge:hover {
  border-color: var(--primary-light);
  color: var(--primary);
  background: var(--surface-color-alt);
}

.cc-icon {
  color: var(--primary-light);
}

.footer-bottom {
  border-top: 1px solid var(--surface-border);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-license-text {
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--text-subtle);
}

.footer-license-text a {
  color: var(--primary-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-license-text a:hover {
  color: var(--text-main);
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-subtle);
}

@media (max-width: 640px) {
  .app-footer {
    padding: 36px 16px 28px;
    margin-top: 48px;
  }

  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ==========================================================================
   Unified Audio Player Bar Component (Parity between Step 4 and Saved Page)
   ========================================================================== */

.review-player-bar,
.saved-player-bar {
  background: var(--nav-bg, rgba(15, 23, 42, 0.92));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1.5px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 12px 18px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: all 0.25s ease;
  position: sticky;
  top: 0;
  z-index: 20;
}

[data-theme="light"] .review-player-bar,
[data-theme="light"] .saved-player-bar {
  background: #FFFFFF;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

.review-player-bar.is-playing,
.saved-player-bar.is-playing {
  border-color: rgba(99, 102, 241, 0.6);
  box-shadow: 0 10px 30px var(--primary-glow);
}

.player-bar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
}

.player-track-info {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1;
}

.sound-wave-box {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  width: 24px;
  height: 24px;
  padding: 2px;
  flex-shrink: 0;
}

.sound-wave-box .wave-bar {
  width: 4px;
  height: 6px;
  background-color: var(--text-subtle);
  border-radius: 2px;
  transition: height 0.2s ease, background-color 0.2s ease;
}

.review-player-bar.is-playing .sound-wave-box .wave-bar,
.saved-player-bar.is-playing .sound-wave-box .wave-bar {
  background: linear-gradient(180deg, var(--accent-emerald), var(--primary-light));
  animation: unifiedSoundWaveAnim 1s ease-in-out infinite alternate;
}

.review-player-bar.is-playing .sound-wave-box .wave-bar:nth-child(1),
.saved-player-bar.is-playing .sound-wave-box .wave-bar:nth-child(1) { animation-delay: 0.1s; }
.review-player-bar.is-playing .sound-wave-box .wave-bar:nth-child(2),
.saved-player-bar.is-playing .sound-wave-box .wave-bar:nth-child(2) { animation-delay: 0.3s; }
.review-player-bar.is-playing .sound-wave-box .wave-bar:nth-child(3),
.saved-player-bar.is-playing .sound-wave-box .wave-bar:nth-child(3) { animation-delay: 0.2s; }
.review-player-bar.is-playing .sound-wave-box .wave-bar:nth-child(4),
.saved-player-bar.is-playing .sound-wave-box .wave-bar:nth-child(4) { animation-delay: 0.4s; }

@keyframes unifiedSoundWaveAnim {
  0% { height: 4px; }
  100% { height: 22px; }
}

.player-text-details {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.player-track-badge {
  font-size: 0.82rem;
  font-weight: 800;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: #A5B4FC;
  background: rgba(99, 102, 241, 0.16);
  border: 1px solid rgba(99, 102, 241, 0.35);
  padding: 4px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  letter-spacing: 0.5px;
  align-self: flex-start;
}

[data-theme="light"] .player-track-badge {
  color: #4F46E5;
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.25);
}

.player-track-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.player-controls-main {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-player-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-full);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-player-step:hover {
  background: var(--surface-color-alt);
  color: var(--text-main);
  transform: scale(1.06);
}

.btn-player-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, #4F46E5 100%);
  border: none;
  border-radius: var(--radius-full);
  color: #FFFFFF;
  cursor: pointer;
  box-shadow: 0 4px 16px var(--primary-glow);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-player-toggle:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.player-controls-side {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0 !important;
}

.btn-play-all-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  background: var(--surface-color-alt);
  border: 1.5px solid var(--surface-border);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  white-space: nowrap !important;
  flex-shrink: 0 !important;
}

.btn-play-all-toggle .playall-text {
  white-space: nowrap !important;
}

.btn-play-all-toggle:hover {
  background: var(--surface-color);
  color: var(--text-main);
  border-color: var(--surface-border-hover);
}

.btn-play-all-toggle.active {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.22) 0%, rgba(5, 150, 105, 0.3) 100%);
  color: #34D399;
  border-color: #10B981;
  box-shadow: 0 0 14px rgba(16, 185, 129, 0.35);
}

[data-theme="light"] .btn-play-all-toggle.active {
  background: rgba(16, 185, 129, 0.12);
  color: #065F46;
  border-color: #059669;
  box-shadow: 0 2px 8px rgba(5, 150, 105, 0.15);
}

.btn-speed-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 34px;
  padding: 0 10px;
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-speed-toggle:hover {
  color: var(--text-main);
  background: var(--surface-color-alt);
}

.player-progress-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
}

.player-time-label {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-subtle);
  font-variant-numeric: tabular-nums;
  min-width: 28px;
}

.player-progress-track {
  position: relative;
  flex: 1;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
  cursor: pointer;
}

[data-theme="light"] .player-progress-track {
  background: rgba(15, 23, 42, 0.09);
}

.player-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent-emerald));
  border-radius: var(--radius-full);
  transition: width 0.1s linear;
}

/* ==========================================================================
   Mobile Version UI Component: Single-Row Player Bar
   Applied:
   1) In Saved Sentences Drawer on BOTH mobile and bigger screen views
   2) In Step 4 Review Player on mobile screens (@media max-width: 768px)
   ========================================================================== */

.saved-sentences-drawer .review-player-bar,
.saved-sentences-drawer .saved-player-bar,
.saved-player-bar {
  padding: 8px 16px;
  border-radius: var(--radius-lg);
  gap: 0;
  margin: 16px 20px 0 20px;
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.5);
}

.player-variant-mobile {
  padding: 8px 16px;
  border-radius: var(--radius-lg);
  gap: 0;
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.5);
}

[data-theme="light"] .saved-sentences-drawer .review-player-bar,
[data-theme="light"] .saved-sentences-drawer .saved-player-bar,
[data-theme="light"] .player-variant-mobile,
[data-theme="light"] .saved-player-bar {
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.saved-sentences-drawer .review-player-bar .player-bar-top,
.saved-sentences-drawer .saved-player-bar .player-bar-top,
.player-variant-mobile .player-bar-top,
.saved-player-bar .player-bar-top {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: nowrap;
  width: 100%;
}

/* Left: Show simple 01/03 sentence badge indicator */
.saved-sentences-drawer .review-player-bar .player-track-info,
.saved-sentences-drawer .saved-player-bar .player-track-info,
.player-variant-mobile .player-track-info,
.saved-player-bar .player-track-info {
  display: flex !important;
  flex: 0 0 auto;
  align-items: center;
  gap: 0;
}

.saved-sentences-drawer .review-player-bar .sound-wave-box,
.saved-sentences-drawer .review-player-bar .player-track-title,
.saved-sentences-drawer .saved-player-bar .sound-wave-box,
.saved-sentences-drawer .saved-player-bar .player-track-title,
.player-variant-mobile .sound-wave-box,
.player-variant-mobile .player-track-title,
.saved-player-bar .sound-wave-box,
.saved-player-bar .player-track-title {
  display: none !important;
}

.saved-sentences-drawer .review-player-bar .player-track-badge,
.saved-sentences-drawer .saved-player-bar .player-track-badge,
.player-variant-mobile .player-track-badge,
.saved-player-bar .player-track-badge {
  font-size: 0.82rem;
  font-weight: 800;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: #A5B4FC;
  background: rgba(99, 102, 241, 0.16);
  border: 1px solid rgba(99, 102, 241, 0.35);
  padding: 4px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  letter-spacing: 0.5px;
}

[data-theme="light"] .saved-sentences-drawer .review-player-bar .player-track-badge,
[data-theme="light"] .saved-sentences-drawer .saved-player-bar .player-track-badge,
[data-theme="light"] .player-variant-mobile .player-track-badge,
[data-theme="light"] .saved-player-bar .player-track-badge {
  color: #4F46E5;
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.25);
}

/* Center: Previous, Play/Pause (current), Next */
.saved-sentences-drawer .review-player-bar .player-controls-main,
.saved-sentences-drawer .saved-player-bar .player-controls-main,
.player-variant-mobile .player-controls-main,
.saved-player-bar .player-controls-main {
  display: flex;
  align-items: center;
  gap: 10px;
}

.saved-sentences-drawer .review-player-bar .btn-player-step,
.saved-sentences-drawer .saved-player-bar .btn-player-step,
.player-variant-mobile .btn-player-step,
.saved-player-bar .btn-player-step {
  width: 38px;
  height: 38px;
}

.saved-sentences-drawer .review-player-bar .btn-player-toggle,
.saved-sentences-drawer .saved-player-bar .btn-player-toggle,
.player-variant-mobile .btn-player-toggle,
.saved-player-bar .btn-player-toggle {
  width: 44px;
  height: 44px;
}

/* Right: Just "전체" Button */
.saved-sentences-drawer .review-player-bar .player-controls-side,
.saved-sentences-drawer .saved-player-bar .player-controls-side,
.player-variant-mobile .player-controls-side,
.saved-player-bar .player-controls-side {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0 !important;
}

.saved-sentences-drawer .review-player-bar .btn-speed-toggle,
.saved-sentences-drawer .saved-player-bar .btn-speed-toggle,
.player-variant-mobile .btn-speed-toggle,
.saved-player-bar .btn-speed-toggle {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 9px;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background: var(--surface-color);
  border: 1px solid var(--surface-border);
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap !important;
  flex-shrink: 0 !important;
  transition: all 0.2s ease;
}

.saved-sentences-drawer .review-player-bar .btn-speed-toggle:hover,
.saved-sentences-drawer .saved-player-bar .btn-speed-toggle:hover,
.player-variant-mobile .btn-speed-toggle:hover,
.saved-player-bar .btn-speed-toggle:hover {
  color: var(--text-main);
  background: var(--surface-color-alt);
  border-color: rgba(99, 102, 241, 0.4);
}

.saved-sentences-drawer .review-player-bar .btn-play-all-toggle,
.saved-sentences-drawer .saved-player-bar .btn-play-all-toggle,
.player-variant-mobile .btn-play-all-toggle,
.saved-player-bar .btn-play-all-toggle {
  height: 36px;
  padding: 0 12px;
  font-size: 0.85rem;
  font-weight: 700;
  gap: 5px;
  border-radius: var(--radius-full);
  white-space: nowrap !important;
  flex-shrink: 0 !important;
}

.saved-sentences-drawer .review-player-bar .btn-play-all-toggle .playall-text,
.saved-sentences-drawer .saved-player-bar .btn-play-all-toggle .playall-text,
.player-variant-mobile .btn-play-all-toggle .playall-text,
.saved-player-bar .btn-play-all-toggle .playall-text {
  white-space: nowrap !important;
}

/* Compact mobile screen optimization (e.g. iPhone SE / <= 400px width) */
@media (max-width: 400px) {
  .saved-sentences-drawer .review-player-bar,
  .saved-sentences-drawer .saved-player-bar,
  .player-variant-mobile,
  .saved-player-bar {
    padding: 8px 10px;
    margin: 12px 10px 0 10px;
  }

  .saved-sentences-drawer .review-player-bar .player-bar-top,
  .saved-sentences-drawer .saved-player-bar .player-bar-top,
  .player-variant-mobile .player-bar-top,
  .saved-player-bar .player-bar-top {
    gap: 6px;
  }

  .saved-sentences-drawer .review-player-bar .player-track-badge,
  .saved-sentences-drawer .saved-player-bar .player-track-badge,
  .player-variant-mobile .player-track-badge,
  .saved-player-bar .player-track-badge {
    padding: 3px 6px;
    font-size: 0.78rem;
  }

  .saved-sentences-drawer .review-player-bar .player-controls-main,
  .saved-sentences-drawer .saved-player-bar .player-controls-main,
  .player-variant-mobile .player-controls-main,
  .saved-player-bar .player-controls-main {
    gap: 6px;
  }

  .saved-sentences-drawer .review-player-bar .btn-player-step,
  .saved-sentences-drawer .saved-player-bar .btn-player-step,
  .player-variant-mobile .btn-player-step,
  .saved-player-bar .btn-player-step {
    width: 34px;
    height: 34px;
  }

  .saved-sentences-drawer .review-player-bar .btn-player-toggle,
  .saved-sentences-drawer .saved-player-bar .btn-player-toggle,
  .player-variant-mobile .btn-player-toggle,
  .saved-player-bar .btn-player-toggle {
    width: 40px;
    height: 40px;
  }

  .saved-sentences-drawer .review-player-bar .btn-play-all-toggle,
  .saved-sentences-drawer .saved-player-bar .btn-play-all-toggle,
  .player-variant-mobile .btn-play-all-toggle,
  .saved-player-bar .btn-play-all-toggle {
    height: 34px;
    padding: 0 10px;
    font-size: 0.8rem;
    gap: 4px;
  }
}

/* Hide progress scrubber on mobile component */
.saved-sentences-drawer .review-player-bar .player-progress-row,
.saved-sentences-drawer .saved-player-bar .player-progress-row,
.player-variant-mobile .player-progress-row,
.saved-player-bar .player-progress-row {
  display: none !important;
}

/* ==========================================================================
   Navbar Lessons Transition Animation (Issue #49)
   ========================================================================== */

.lesson-flyer-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9998;
  background: rgba(15, 23, 42, 0.48);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] .lesson-flyer-backdrop {
  background: rgba(15, 23, 42, 0.38);
}

.lesson-flyer-backdrop.active {
  opacity: 1;
}

.lesson-nav-flyer {
  position: fixed;
  z-index: 9999;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform: translate(-50%, -50%) scale(0.35);
  will-change: transform, left, top, opacity;
  transition: left 0.4s cubic-bezier(0.2, 0.8, 0.25, 1),
              top 0.4s cubic-bezier(0.2, 0.8, 0.25, 1),
              transform 0.4s cubic-bezier(0.2, 0.8, 0.25, 1),
              opacity 0.28s ease;
}

.lesson-nav-flyer .lesson-flyer-icon-wrap {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 4px 14px rgba(99, 102, 241, 0.35));
  transition: width 0.4s cubic-bezier(0.2, 0.8, 0.25, 1),
              height 0.4s cubic-bezier(0.2, 0.8, 0.25, 1),
              filter 0.4s cubic-bezier(0.2, 0.8, 0.25, 1);
}

.lesson-nav-flyer .lesson-flyer-hd-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.lesson-nav-flyer .lesson-flyer-caption {
  margin-top: 14px;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #FFFFFF;
  background: rgba(30, 41, 59, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 8px 22px;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4),
              0 0 24px rgba(99, 102, 241, 0.35);
  opacity: 0;
  transform: translateY(12px) scale(0.9);
  transition: opacity 0.32s ease 0.1s, transform 0.32s cubic-bezier(0.16, 1, 0.3, 1) 0.1s;
  white-space: nowrap;
}

[data-theme="light"] .lesson-nav-flyer .lesson-flyer-caption {
  color: #0F172A;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(226, 232, 240, 0.95);
  box-shadow: 0 12px 35px -6px rgba(15, 23, 42, 0.2),
              0 0 20px rgba(79, 70, 229, 0.15);
}

.lesson-nav-flyer.flying-to-center {
  transform: translate(-50%, -50%) scale(1);
}

.lesson-nav-flyer.flying-to-center .lesson-flyer-icon-wrap {
  width: 140px;
  height: 140px;
  filter: drop-shadow(0 16px 45px rgba(99, 102, 241, 0.55));
}

.lesson-nav-flyer.flying-to-center .lesson-flyer-caption {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.lesson-nav-flyer.fade-away {
  opacity: 0;
  transform: translate(-50%, -50%) scale(1.15);
}