/* PHUONGTHAOLEARNENGLISH - Premium Design System & Theme Stylesheet
 * Modern Glassmorphism, Dual Theme (Dark/Light), Smooth Micro-animations & Responsive Layout
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Dark Theme Palette (Default) */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --bg-input: rgba(15, 23, 42, 0.8);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.6);
  --border-accent: rgba(14, 165, 233, 0.3);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #38bdf8;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-glow: rgba(79, 70, 229, 0.35);

  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-violet: #8b5cf6;

  /* CEFR Badges */
  --cefr-a1: #10b981;
  --cefr-a2: #059669;
  --cefr-b1: #0284c7;
  --cefr-b2: #2563eb;
  --cefr-c1: #7c3aed;
  --cefr-c2: #db2777;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px var(--primary-glow);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Light Mode Overrides (Default) */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-input: #ffffff;
  --border-subtle: #e2e8f0;
  --border-focus: #4f46e5;
  --border-accent: #0284c7;

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-accent: #2563eb;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-glow: rgba(79, 70, 229, 0.2);

  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.18);
}

/* CSS Reset & Core Typography */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 90% 20%, rgba(6, 182, 212, 0.06) 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Font Size Scales */
body.font-large {
  font-size: 17.5px;
}
body.font-large .sub-word {
  font-size: 1.22rem;
}
body.font-large .sub-vi {
  font-size: 1.05rem;
}

body.font-xlarge {
  font-size: 19px;
}
body.font-xlarge .sub-word {
  font-size: 1.4rem;
}
body.font-xlarge .sub-vi {
  font-size: 1.15rem;
}

/* Container */
.app-container {
  max-width: 1480px;
  margin: 0 auto;
  padding: 0 20px 80px;
}

/* Header & Brand */
.app-header {
  padding: 24px 0 16px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.brand-title {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  font-weight: 800;
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.brand-text h1 {
  font-family: var(--font-heading);
  font-size: clamp(22px, 3.5vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #f8fafc 40%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
[data-theme="light"] .brand-text h1 {
  background: linear-gradient(135deg, #0f172a 40%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text p {
  font-size: 13.5px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Top Quick Badges */
.header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.stat-chip {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.stat-chip b {
  color: var(--accent-cyan);
  font-weight: 700;
}

/* Quick Controls: Theme & Font */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-icon {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  transition: all var(--transition-fast);
}
.btn-icon:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-1px);
}

.font-size-group {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 3px;
}
.font-btn {
  background: none;
  border: none;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: 5px;
  transition: all var(--transition-fast);
}
.font-btn.active {
  background: var(--primary);
  color: #fff;
}

/* Navigation Tabs */
.nav-tabs-wrapper {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 25, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  margin: 0 -20px 24px;
  padding: 0 20px;
}
[data-theme="light"] .nav-tabs-wrapper {
  background: rgba(248, 250, 252, 0.9);
}

.nav-tabs {
  max-width: 1480px;
  margin: 0 auto;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 10px 0;
  scrollbar-width: none;
}
.nav-tabs::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  background: none;
  border: 1px solid transparent;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}
.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}
.tab-btn.active {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #6366f1);
  box-shadow: 0 4px 14px var(--primary-glow);
}

/* Tab Panels */
.tab-panel {
  display: none !important;
}
.tab-panel.active {
  display: block !important;
  animation: fadeIn 0.25s ease;
}

.hidden {
  display: none !important;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* SECTION 1: YOUTUBE PLAYER & SUBTITLES */
.player-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: start;
}
@media (max-width: 1080px) {
  .player-layout {
    grid-template-columns: 1fr;
  }
}

/* Input Bar Card */
.url-bar-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.url-input-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.url-input-wrapper {
  flex: 1;
  min-width: 280px;
  position: relative;
}
.url-input-wrapper input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 16px 12px 42px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14.5px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.url-input-wrapper input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}
.url-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-rose);
  font-size: 18px;
}

.btn-primary {
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 12px 22px;
  font-weight: 700;
  font-size: 14.5px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 7px;
  transition: all var(--transition-fast);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
}

.status-pill {
  margin-top: 12px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  background: rgba(30, 41, 59, 0.5);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.status-pill.success {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.3);
  color: #10b981;
  font-weight: 600;
}
.status-pill.error {
  background: rgba(244, 63, 94, 0.12);
  border-color: rgba(244, 63, 94, 0.3);
  color: #f43f5e;
}

/* Video Stage Card */
.video-stage-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.video-player-container {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 Aspect Ratio */
  background: #000;
}
.video-player-container #player-host,
.video-player-container iframe,
.video-player-container .player-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}
#player-host iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.player-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 20px;
}
.player-placeholder-icon {
  font-size: 54px;
  color: var(--primary);
  opacity: 0.8;
}

/* Video Source Switcher */
.video-source-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}
.source-chip {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.source-chip:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-focus);
}
.source-chip.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.source-chip-link {
  font-size: 12px;
  color: var(--text-accent);
  text-decoration: none;
  font-weight: 600;
  padding: 4px 8px;
}
.source-chip-link:hover {
  text-decoration: underline;
}

/* Custom Action Button Bar (DUANFANGCAOXUEXIHANYU style) */
.study-hint-banner {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 16px 0 12px;
  padding: 10px 16px;
  background: #f1f5f9;
  border-left: 4px solid #3b82f6;
  border-radius: 4px;
}
[data-theme="dark"] .study-hint-banner {
  background: rgba(30, 41, 59, 0.6);
  border-left-color: #60a5fa;
}

.action-btn-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.btn-action-outline {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #1e293b;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}
.btn-action-outline:hover {
  background: #f8fafc;
  border-color: #94a3b8;
  transform: translateY(-1px);
}
[data-theme="dark"] .btn-action-outline {
  background: var(--bg-card);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}
[data-theme="dark"] .btn-action-outline:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
}

.btn-action-primary {
  background: #2563eb;
  border: 1px solid #1d4ed8;
  color: #ffffff;
  padding: 9px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
}
.btn-action-primary:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
}

.btn-action-green {
  background: #15803d;
  border: 1px solid #166534;
  color: #ffffff;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(21, 128, 61, 0.35);
}
.btn-action-green:hover {
  background: #166534;
  transform: translateY(-1px);
}

.btn-action-orange {
  background: #d97706;
  border: 1px solid #b45309;
  color: #ffffff;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(217, 119, 6, 0.35);
}
.btn-action-orange:hover {
  background: #b45309;
  transform: translateY(-1px);
}

.btn-action-blue {
  background: #0284c7;
  border: 1px solid #0369a1;
  color: #ffffff;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.35);
}
.btn-action-blue:hover {
  background: #0369a1;
  transform: translateY(-1px);
}

.btn-action-purple {
  background: #7c3aed;
  border: 1px solid #6d28d9;
  color: #ffffff;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px rgba(124, 58, 237, 0.35);
}
.btn-action-purple:hover {
  background: #6d28d9;
  transform: translateY(-1px);
}

/* Player Controls Bar */
.player-controls-bar {
  padding: 14px 18px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.controls-left, .controls-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.ctrl-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}
.ctrl-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
}
.ctrl-btn.active {
  background: var(--accent-emerald);
  color: #fff;
  border-color: var(--accent-emerald);
}

.time-display {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-accent);
  background: rgba(15, 23, 42, 0.6);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.speed-select {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  outline: none;
  cursor: pointer;
}

/* Subtitle Stream Panel */
.subtitle-stream-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  height: 620px;
  box-shadow: var(--shadow-md);
}

.sub-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.sub-title h3 {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sub-meta-badge {
  font-size: 12px;
  padding: 3px 10px;
  background: rgba(14, 165, 233, 0.15);
  color: var(--accent-cyan);
  border-radius: var(--radius-full);
  font-weight: 600;
}

.sub-search-box {
  padding: 10px 20px;
  border-bottom: 1px solid var(--border-subtle);
}
.sub-search-box input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13.5px;
  color: var(--text-primary);
  outline: none;
}
.sub-search-box input:focus {
  border-color: var(--border-focus);
}

.sub-list {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Individual Subtitle Cue Item */
.sub-cue {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  gap: 12px;
  align-items: flex-start;
  box-shadow: var(--shadow-sm);
}
.sub-cue:hover {
  background: var(--bg-card-hover);
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateX(2px);
}
.sub-cue.active {
  background: rgba(79, 70, 229, 0.12);
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.18);
}

[data-theme="light"] .sub-cue {
  background: #ffffff;
  border-color: #e2e8f0;
}
[data-theme="light"] .sub-cue:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}
[data-theme="light"] .sub-cue.active {
  background: #eef2ff;
  border-color: #4f46e5;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.15);
}

.cue-time {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.15);
  padding: 3px 7px;
  border-radius: 5px;
  white-space: nowrap;
}
[data-theme="light"] .cue-time {
  background: #f1f5f9;
  color: #475569;
  border: 1px solid #e2e8f0;
}
.sub-cue.active .cue-time {
  color: #fff;
  background: var(--primary);
}

.cue-content {
  flex: 1;
}

.cue-en {
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--text-primary);
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}

.cue-vi {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-top: 5px;
  padding-top: 4px;
  border-top: 1px dashed rgba(255, 255, 255, 0.08);
}
[data-theme="light"] .cue-vi {
  border-top-color: rgba(0, 0, 0, 0.08);
}

/* Clickable Word Tokens in Subtitle - Colored by Level with No Text Clutter */
.word-token {
  background: none;
  border: 1px solid transparent;
  padding: 1px 3px;
  border-radius: 4px;
  font-size: inherit;
  font-weight: inherit;
  color: inherit;
  cursor: pointer;
  position: relative;
  transition: all var(--transition-fast);
  text-decoration: none;
  display: inline-block;
}

/* A1 / A2: Clean, natural fluent reading */
.word-token.word-cefr-A1,
.word-token.word-cefr-A2 {
  color: inherit;
  border-color: transparent;
}

/* B1: Subtle Ocean Cyan */
.word-token.word-cefr-B1 {
  color: #0284c7;
  border-bottom: 2px solid rgba(2, 132, 199, 0.45);
}

/* B2: Cambridge Royal Blue (Xanh Lam) */
.word-token.word-cefr-B2 {
  color: #2563eb;
  font-weight: 600;
  border-bottom: 2px solid #2563eb;
  background: rgba(37, 99, 235, 0.08);
}

/* C1: Cambridge Violet (Tím Oải Hương) */
.word-token.word-cefr-C1 {
  color: #7c3aed;
  font-weight: 700;
  border-bottom: 2px solid #7c3aed;
  background: rgba(124, 58, 237, 0.12);
}

/* C2: Cambridge Coral Rose (Hồng San Hô) */
.word-token.word-cefr-C2 {
  color: #db2777;
  font-weight: 800;
  border-bottom: 2px solid #db2777;
  background: rgba(219, 39, 119, 0.14);
}

/* Dark Mode Overrides */
[data-theme="dark"] .word-token.word-cefr-B1 {
  color: #38bdf8;
  border-bottom-color: rgba(56, 189, 248, 0.6);
}
[data-theme="dark"] .word-token.word-cefr-B2 {
  color: #60a5fa;
  border-bottom-color: #60a5fa;
  background: rgba(96, 165, 250, 0.15);
}
[data-theme="dark"] .word-token.word-cefr-C1 {
  color: #c084fc;
  border-bottom-color: #c084fc;
  background: rgba(192, 132, 252, 0.18);
}
[data-theme="dark"] .word-token.word-cefr-C2 {
  color: #f472b6;
  border-bottom-color: #f472b6;
  background: rgba(244, 114, 182, 0.22);
}

.word-token:hover {
  transform: translateY(-1px);
  filter: brightness(1.25);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.cefr-dot {
  font-size: 9.5px;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 3px;
  color: #fff;
  vertical-align: middle;
  line-height: 1;
}
.cefr-A1 { background: var(--cefr-a1); }
.cefr-A2 { background: var(--cefr-a2); }
.cefr-B1 { background: var(--cefr-b1); }
.cefr-B2 { background: var(--cefr-b2); }
.cefr-C1 { background: var(--cefr-c1); }
.cefr-C2 { background: var(--cefr-c2); }

/* Current Focus Sentence Card */
.current-focus-card {
  margin-top: 24px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  min-height: 180px;
  transition: border-color var(--transition-fast);
}

.focus-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.focus-badge {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 6px;
}

.focus-sentence-display {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.focus-translation-display {
  font-size: 15px;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 16px;
}

.focus-actions-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* SECTION 2: 8 CHANNELS SHOWCASE */
.channels-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 28px;
}
.channels-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 800;
  margin-bottom: 8px;
}
.channels-header p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* Channel Tabs Bar */
.channel-pills-bar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 14px;
  margin-bottom: 24px;
  scrollbar-width: thin;
}
.channel-pill-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 10px 18px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}
.channel-pill-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-focus);
}
.channel-pill-btn.active {
  background: linear-gradient(135deg, var(--primary), #06b6d4);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px var(--primary-glow);
}

/* Channel Profile Banner */
.channel-profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
  margin-bottom: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.channel-info h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.channel-info p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 750px;
}
.channel-tags {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.tag-chip {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
}

/* Video Grid */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 22px;
}

.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md);
}

.video-card-thumb {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background: #000;
  overflow: hidden;
}
.video-card-thumb img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}
.video-card:hover .video-card-thumb img {
  transform: scale(1.05);
}

.video-play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(79, 70, 229, 0.85);
  backdrop-filter: blur(4px);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  opacity: 0;
  transition: all var(--transition-fast);
}
.video-card:hover .video-play-overlay {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.1);
}

.video-duration-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 2px 7px;
  border-radius: 4px;
}

.video-card-body {
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

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

.level-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}
.level-badge.a2 { background: rgba(16, 185, 129, 0.2); color: #10b981; }
.level-badge.b1 { background: rgba(2, 132, 199, 0.2); color: #38bdf8; }
.level-badge.b2 { background: rgba(79, 70, 229, 0.2); color: #818cf8; }
.level-badge.c1 { background: rgba(124, 58, 237, 0.2); color: #c084fc; }

.video-card-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 14px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
}

.card-study-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}
.card-study-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

/* SECTION 3: GRAMMAR & VOCABULARY REPORT */
.report-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.stats-card-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.stat-metric-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.stat-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  background: rgba(79, 70, 229, 0.15);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}
.stat-info h4 {
  font-size: 12.5px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.stat-info .stat-value {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
}

/* CEFR Progress Bar Card */
.cefr-report-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
}
.cefr-report-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cefr-bars-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cefr-bar-row {
  display: grid;
  grid-template-columns: 60px 1fr 60px;
  align-items: center;
  gap: 12px;
}
.cefr-bar-label {
  font-weight: 700;
  font-size: 13.5px;
}
.cefr-bar-track {
  height: 12px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
}
[data-theme="light"] .cefr-bar-track {
  background: rgba(0, 0, 0, 0.08);
}
.cefr-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Grammar Highlights List */
.grammar-report-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.grammar-report-card h3 {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.grammar-cards-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.grammar-item-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}
.grammar-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 8px;
}
.grammar-item-title {
  font-weight: 700;
  font-size: 16px;
  color: var(--text-primary);
}
.grammar-item-formula {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 3px 8px;
  border-radius: 4px;
}
.grammar-item-desc {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.grammar-examples-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.grammar-example-cue {
  background: rgba(15, 23, 42, 0.4);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.grammar-example-cue .snippet {
  color: var(--accent-amber);
  font-weight: 700;
}
.jump-time-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-accent);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
}
.jump-time-btn:hover {
  background: var(--primary);
  color: #fff;
}

/* SECTION 4: PRACTICE QUIZ & FLASHCARDS */
.practice-container {
  max-width: 820px;
  margin: 0 auto;
}

/* Flashcard 3D Component */
.flashcard-stage {
  perspective: 1200px;
  margin-bottom: 24px;
}
.flashcard-inner {
  position: relative;
  width: 100%;
  height: 320px;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
}
.flashcard-inner.flipped {
  transform: rotateY(180deg);
}

.flashcard-front, .flashcard-back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 2px solid var(--border-subtle);
  box-shadow: var(--shadow-lg);
}
.flashcard-back {
  transform: rotateY(180deg);
  background: linear-gradient(135deg, rgba(17, 24, 39, 0.95), rgba(30, 41, 59, 0.95));
  border-color: var(--border-focus);
}
[data-theme="light"] .flashcard-front {
  background: #ffffff;
  border-color: #e2e8f0;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
}
[data-theme="light"] .flashcard-back {
  background: #ffffff;
  border-color: #6366f1;
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.12);
}

.flashcard-word {
  font-family: var(--font-heading);
  font-size: 40px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.flashcard-ipa {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}
.flashcard-meaning {
  font-size: 22px;
  font-weight: 700;
  color: #10b981;
  margin-bottom: 10px;
}
.flashcard-en-def {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 14px;
}

.flashcard-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

/* Quiz Card */
.quiz-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}
.quiz-question-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.quiz-word-prompt {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 20px;
}

.quiz-options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 20px;
}
@media (min-width: 640px) {
  .quiz-options-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.quiz-opt-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.quiz-opt-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
}
.quiz-opt-btn.correct {
  background: rgba(16, 185, 129, 0.2);
  border-color: #10b981;
  color: #10b981;
  font-weight: 700;
}
.quiz-opt-btn.wrong {
  background: rgba(244, 63, 94, 0.2);
  border-color: #f43f5e;
  color: #f43f5e;
}

/* SECTION 5: DICTATION & SHADOWING */
.dictation-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 860px;
  margin: 0 auto;
}

.dictation-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-md);
}

.dictation-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  resize: vertical;
  min-height: 110px;
  outline: none;
  margin-bottom: 16px;
}
.dictation-textarea:focus {
  border-color: var(--border-focus);
}

.accuracy-meter {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
  padding: 14px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

/* SECTION 6: NOTEBOOK & EXPORT */
.notebook-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.notebook-table-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.notebook-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.notebook-table th, .notebook-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
}
.notebook-table th {
  background: var(--bg-secondary);
  font-size: 13px;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
}

/* MODAL POPUPS */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

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

.modal-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 100%;
  padding: 28px;
  box-shadow: var(--shadow-lg);
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
}

[data-theme="light"] .modal-box {
  background: #ffffff;
  border-color: #e2e8f0;
  box-shadow: 0 20px 45px rgba(15, 23, 42, 0.18);
  color: #0f172a;
}

.modal-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
}
.modal-close-btn:hover {
  color: var(--text-primary);
}

/* Responsive Rules */
@media (max-width: 768px) {
  .app-container {
    padding: 0 12px 60px;
  }
  .nav-tabs-wrapper {
    margin: 0 -12px 18px;
    padding: 0 12px;
  }
  .player-layout {
    gap: 16px;
  }
  .subtitle-stream-card {
    height: 480px;
  }
}

/* ============================================================== */
/* INLINE SHADOWING & PRONUNCIATION SCORING WIDGET (ON VIDEO CLIP)*/
/* ============================================================== */
.inline-shadowing-card {
  margin-top: 14px;
  background: var(--bg-card);
  border: 2px solid var(--accent-emerald, #10b981);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.12);
  animation: fadeIn 0.25s ease-out;
}

[data-theme="light"] .inline-shadowing-card {
  background: #f0fdf4;
  border-color: #10b981;
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.15);
}

.shadowing-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.shadowing-pulse-dot {
  display: inline-block;
  font-size: 14px;
  animation: pulseRecording 1.4s infinite;
}

@keyframes pulseRecording {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.6; }
  100% { transform: scale(1); opacity: 1; }
}

.shadowing-target-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 14px;
}

[data-theme="light"] .shadowing-target-box {
  background: #ffffff;
  border-color: #cbd5e1;
}

.shadowing-target-text {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
}

.shadowing-controls-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.btn-shadowing-record {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #10b981;
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.btn-shadowing-record:hover {
  background: #059669;
  transform: translateY(-1px);
}

.btn-shadowing-record.recording {
  background: #ef4444 !important;
  box-shadow: 0 0 16px rgba(239, 68, 68, 0.6) !important;
  animation: pulseRecordBtn 1s infinite alternate;
}

@keyframes pulseRecordBtn {
  from { transform: scale(1); }
  to { transform: scale(1.04); }
}

.btn-shadowing-sample {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

[data-theme="light"] .btn-shadowing-sample {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #1e293b;
}

.btn-shadowing-sample:hover {
  border-color: var(--border-focus);
}

.btn-shadowing-playback {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #3b82f6;
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.btn-shadowing-playback:hover {
  background: #2563eb;
}

.shadowing-result-box {
  margin-top: 14px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-sm);
  animation: fadeIn 0.3s ease-out;
}

[data-theme="light"] .shadowing-result-box {
  background: #ffffff;
  border-color: #94a3b8;
}

.shadowing-score-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.shadowing-score-badge {
  font-size: 14.5px;
  font-weight: 800;
  color: #10b981;
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.shadowing-score-comment {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.shadowing-comparison-display {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
  line-height: 1.8;
}

.shadow-token {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
}

.shadow-token.matched {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.shadow-token.near {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fde68a;
}

.shadow-token.missed {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
  text-decoration: line-through;
}

/* ============================================================== */
/* GRAMMAR HANDBOOK STYLING                                       */
/* ============================================================== */
.grammar-filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

.grammar-chip {
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

[data-theme="light"] .grammar-chip {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #475569;
}

.grammar-chip:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

.grammar-chip.active {
  background: #1e3a8a;
  border-color: #1e3a8a;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(30, 58, 138, 0.25);
}

.grammar-cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
  gap: 20px;
}

@media (max-width: 640px) {
  .grammar-cards-container {
    grid-template-columns: 1fr;
  }
}

.grammar-handbook-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
  position: relative;
}

[data-theme="light"] .grammar-handbook-card {
  background: #ffffff;
  border-color: #e2e8f0;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.04);
}

.grammar-handbook-card:hover {
  border-color: #3b82f6;
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.12);
  transform: translateY(-2px);
}

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

.grammar-rule-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.4;
}

.grammar-formula-box {
  background: #0f172a;
  color: #38bdf8;
  font-family: var(--font-mono, monospace);
  font-size: 13px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border-left: 3px solid #38bdf8;
  line-height: 1.4;
  word-break: break-word;
}

.grammar-desc-text {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.grammar-ielts-box {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-size: 12.5px;
  color: #b45309;
  margin-bottom: 14px;
  line-height: 1.5;
}

[data-theme="dark"] .grammar-ielts-box {
  color: #fbbf24;
}

.grammar-examples-section {
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
  margin-top: auto;
}

.grammar-example-row {
  margin-bottom: 8px;
  font-size: 13px;
}

.grammar-example-en {
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.grammar-example-vi {
  color: var(--text-muted);
  font-style: italic;
  font-size: 12.5px;
  margin-left: 22px;
  margin-top: 2px;
}

.grammar-in-video-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #fef08a;
  color: #854d0e;
  border: 1px solid #facc15;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11.5px;
  font-weight: 700;
  margin-top: 8px;
  cursor: pointer;
}

/* ============================================================== */
/* IELTS SPEAKING AI EXAMINER STYLING                             */
/* ============================================================== */
.speaking-setup-bar {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  margin-bottom: 20px;
}
[data-theme="light"] .speaking-setup-bar {
  background: #ffffff;
  border-color: #cbd5e1;
}

.speaking-setup-item {
  display: flex;
  align-items: center;
  gap: 10px;
}
.speaking-setup-item label {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-secondary);
}

.speaking-stage-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: start;
}
@media (max-width: 960px) {
  .speaking-stage-grid {
    grid-template-columns: 1fr;
  }
}

.speaking-chat-column, .speaking-eval-column {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.speaking-chat-card, .speaking-eval-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
[data-theme="light"] .speaking-chat-card,
[data-theme="light"] .speaking-eval-card {
  background: #ffffff;
  border-color: #e2e8f0;
}

.speaking-dialog-flow {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 280px;
  max-height: 440px;
  overflow-y: auto;
  padding: 8px 4px;
  margin-bottom: 16px;
}

.speaking-bubble {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  max-width: 92%;
  animation: fadeIn 0.3s ease;
}
.speaking-bubble.examiner {
  align-self: flex-start;
}
.speaking-bubble.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.speaking-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.speaking-bubble.examiner .speaking-avatar {
  background: #1e3a8a;
  color: #fff;
}
.speaking-bubble.user .speaking-avatar {
  background: #059669;
  color: #fff;
}

.speaking-text-box {
  background: var(--bg-input, #1e293b);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.55;
  position: relative;
}
[data-theme="light"] .speaking-bubble.examiner .speaking-text-box {
  background: #f1f5f9;
  color: #0f172a;
  border-color: #e2e8f0;
}
[data-theme="light"] .speaking-bubble.user .speaking-text-box {
  background: #ecfdf5;
  color: #064e3b;
  border-color: #a7f3d0;
}

.speaking-audio-replay-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
  margin-left: 6px;
  opacity: 0.75;
  transition: opacity 0.2s;
}
.speaking-audio-replay-btn:hover {
  opacity: 1;
}

/* Part 2 Cue Card */
.cuecard-box {
  background: #fffbeb;
  border: 2px dashed #f59e0b;
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 14px;
  color: #78350f;
}
[data-theme="dark"] .cuecard-box {
  background: #1f1b13;
  color: #fde68a;
}
.cuecard-title {
  font-size: 15px;
  font-weight: 800;
  margin-bottom: 8px;
  color: #b45309;
}
[data-theme="dark"] .cuecard-title {
  color: #fbbf24;
}
.cuecard-points {
  font-size: 13.5px;
  line-height: 1.6;
  margin: 0 0 10px 18px;
  padding: 0;
}
.cuecard-timer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: 10px;
  border-top: 1px solid rgba(245, 158, 11, 0.3);
}

.countdown-pill {
  font-family: var(--font-mono, monospace);
  font-size: 15px;
  font-weight: 800;
  background: #b45309;
  color: #fff;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.5px;
}

/* Microphone Orb Control */
.voice-mic-control-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  padding: 16px 0 6px;
  border-top: 1px solid var(--border-subtle);
}

.voice-mic-orb {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  border: 3px solid rgba(255,255,255,0.4);
  color: #ffffff;
  font-size: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}
.voice-mic-orb:hover {
  transform: scale(1.06);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.55);
}
.voice-mic-orb.recording {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  box-shadow: 0 0 0 8px rgba(239, 68, 68, 0.25), 0 6px 20px rgba(239, 68, 68, 0.4);
  animation: pulseMic 1.2s infinite;
}
@keyframes pulseMic {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6); }
  70% { transform: scale(1.08); box-shadow: 0 0 0 16px rgba(239, 68, 68, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.voice-status-text {
  font-size: 13.5px;
  color: var(--text-secondary);
  font-weight: 600;
}

/* Speaking Evaluation Cards */
.speaking-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}
.speaking-metric-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px;
}
[data-theme="light"] .speaking-metric-card {
  background: #f8fafc;
  border-color: #e2e8f0;
}
.speaking-metric-name {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}
.speaking-metric-score {
  font-size: 22px;
  font-weight: 800;
  color: #3b82f6;
  margin: 4px 0 6px;
}
.speaking-score-bar-track {
  height: 6px;
  background: #e2e8f0;
  border-radius: 999px;
  overflow: hidden;
}
[data-theme="dark"] .speaking-score-bar-track {
  background: #334155;
}
.speaking-score-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #10b981);
  border-radius: 999px;
  transition: width 0.5s ease;
}

.eval-section-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 14px;
}
[data-theme="light"] .eval-section-box {
  background: #f8fafc;
  border-color: #e2e8f0;
}
.eval-section-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

/* ============================================================== */
/* LEXIBOT IELTS WRITING ESSAY CHECKER STYLING                    */
/* ============================================================== */
.writing-config-bar {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  margin-bottom: 20px;
}
[data-theme="light"] .writing-config-bar {
  background: #ffffff;
  border-color: #cbd5e1;
}
.writing-config-item {
  display: flex;
  align-items: center;
  gap: 10px;
}
.writing-config-item label {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-secondary);
  white-space: nowrap;
}

.writing-prompt-card {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.08), rgba(59, 130, 246, 0.08));
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 20px;
}
.writing-prompt-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.6;
}

.writing-editor-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
[data-theme="light"] .writing-editor-card {
  background: #ffffff;
  border-color: #e2e8f0;
}

.writing-editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 10px;
}

.word-counter-badge {
  font-size: 13px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
  transition: all 0.3s;
}
.word-counter-badge.good {
  background: #d1fae5;
  color: #065f46;
  border-color: #a7f3d0;
}
.word-counter-badge.excess {
  background: #e0f2fe;
  color: #0369a1;
  border-color: #bae6fd;
}

.writing-textarea {
  width: 100%;
  height: 280px;
  background: var(--bg-input, #0f172a);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.65;
  resize: vertical;
  transition: border-color 0.2s;
}
[data-theme="light"] .writing-textarea {
  background: #f8fafc;
  color: #0f172a;
  border-color: #cbd5e1;
}
.writing-textarea:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.writing-actions-row {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 14px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.btn-action-green {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
  transition: all 0.25s ease;
}
.btn-action-green:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.5);
}

.btn-action-blue {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  transition: all 0.25s ease;
}
.btn-action-blue:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.5);
}

/* LexiBot Results Dashboard */
.writing-results-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
  animation: fadeIn 0.4s ease;
}
[data-theme="light"] .writing-results-card {
  background: #ffffff;
  border-color: #e2e8f0;
}

.writing-results-head {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.overall-band-circle {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  color: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 18px rgba(59, 130, 246, 0.4);
  flex-shrink: 0;
}
.overall-band-circle .band-number {
  font-size: 32px;
  font-weight: 900;
  line-height: 1;
}
.overall-band-circle .band-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 3px;
}

.four-criteria-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.criterion-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}
[data-theme="light"] .criterion-card {
  background: #f8fafc;
  border-color: #e2e8f0;
}
.criterion-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}
.criterion-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}
.criterion-score {
  font-size: 18px;
  font-weight: 800;
  color: #3b82f6;
}
.criterion-bar-track {
  height: 7px;
  background: #e2e8f0;
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 8px;
}
[data-theme="dark"] .criterion-bar-track {
  background: #334155;
}
.criterion-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #10b981);
  border-radius: 999px;
  transition: width 0.6s ease;
}
.criterion-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Redline Diff */
.redline-diff-card {
  margin-bottom: 26px;
}
.redline-item {
  background: rgba(255, 255, 255, 0.03);
  border-left: 4px solid #ef4444;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  margin-bottom: 12px;
  border-top: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
[data-theme="light"] .redline-item {
  background: #f8fafc;
}
.redline-orig {
  color: #dc2626;
  font-size: 13.5px;
  text-decoration: line-through;
  margin-bottom: 4px;
}
.redline-corr {
  color: #059669;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}
.redline-exp {
  font-size: 12.5px;
  color: var(--text-muted);
  font-style: italic;
}

/* Vocab Upgrades Table */
.vocab-upgrades-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
  margin-bottom: 24px;
}
.vocab-upgrades-table th {
  background: #1e3a8a;
  color: #ffffff;
  text-align: left;
  padding: 10px 14px;
  font-weight: 700;
}
.vocab-upgrades-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}
[data-theme="light"] .vocab-upgrades-table td {
  border-bottom-color: #e2e8f0;
}
.vocab-upgrades-table tr:hover {
  background: rgba(59, 130, 246, 0.05);
}

/* Model Essay Box */
.model-essay-box {
  background: rgba(16, 185, 129, 0.06);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-primary);
  white-space: pre-wrap;
}

/* ============================================================== */
/* CLIP REPORT PREVIEW MODAL & PRINT/PDF EXPORT STYLING           */
/* ============================================================== */
.preview-report-document-body {
  background: #ffffff;
  color: #0f172a;
  border-radius: var(--radius-md);
  padding: 24px 28px;
  font-family: Calibri, 'Segoe UI', Arial, sans-serif;
}
[data-theme="dark"] .preview-report-document-body {
  background: #0f172a;
  color: #f8fafc;
}

.preview-doc-title {
  font-size: 20px;
  font-weight: 800;
  color: #0070c0;
  margin: 0 0 4px 0;
}
[data-theme="dark"] .preview-doc-title {
  color: #38bdf8;
}

.preview-doc-sub {
  font-size: 13px;
  color: #64748b;
  font-style: italic;
  margin: 0 0 16px 0;
}

/* Preview Legend Bar */
.preview-legend-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  padding: 8px 12px;
  border-radius: 6px;
}
[data-theme="dark"] .preview-legend-row {
  background: #1e293b;
  border-color: #334155;
}

.preview-badge-legend {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
}
.badge-b2 {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #93c5fd;
}
.badge-c1 {
  background: #f3e8ff;
  color: #6b21a8;
  border: 1px solid #d8b4fe;
}
.badge-c2 {
  background: #ffe4e6;
  color: #9f1239;
  border: 1px solid #fecdd3;
}
.badge-a1b1 {
  background: #f1f5f9;
  color: #475569;
  border: 1px solid #cbd5e1;
}

/* Document Table in Preview */
.preview-doc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-bottom: 24px;
}
.preview-doc-table th {
  background: #0070c0;
  color: #ffffff;
  padding: 9px 12px;
  font-weight: 700;
  border: 1px solid #005a9e;
  text-align: center;
}
.preview-doc-table td {
  padding: 8px 12px;
  border: 1px solid #cbd5e1;
  vertical-align: middle;
}
[data-theme="dark"] .preview-doc-table td {
  border-color: #334155;
}

.preview-doc-table tr.row-b2 td {
  background-color: #dbeafe !important;
  color: #1e3a8a !important;
}
.preview-doc-table tr.row-c1 td {
  background-color: #f3e8ff !important;
  color: #581c87 !important;
}
.preview-doc-table tr.row-c2 td {
  background-color: #ffe4e6 !important;
  color: #881337 !important;
}
.preview-doc-table tr.row-a1b1 td {
  background-color: #f8fafc !important;
  color: #0f172a !important;
}

/* Print Media Query for PDF Generation */
@media print {
  body * {
    visibility: hidden !important;
  }
  #clip-report-preview-modal,
  #clip-report-preview-modal * {
    visibility: visible !important;
  }
  #clip-report-preview-modal {
    position: absolute !important;
    left: 0 !important;
    top: 0 !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    background: #ffffff !important;
    color: #000000 !important;
    display: block !important;
  }
  .modal-overlay {
    background: none !important;
    position: static !important;
    overflow: visible !important;
  }
  .modal-box {
    max-width: 100% !important;
    width: 100% !important;
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
  }
  .preview-modal-actions,
  .modal-close-btn {
    display: none !important;
  }
  * {
    -webkit-print-color-adjust: exact !important;
    print-color-adjust: exact !important;
  }
  .row-b2 td, .badge-b2 {
    background-color: #dbeafe !important;
    color: #1e3a8a !important;
  }
  .row-c1 td, .badge-c1 {
    background-color: #f3e8ff !important;
    color: #581c87 !important;
  }
  .row-c2 td, .badge-c2 {
    background-color: #ffe4e6 !important;
    color: #881337 !important;
  }
  .row-a1b1 td, .badge-a1b1 {
    background-color: #f8fafc !important;
    color: #0f172a !important;
  }
  th {
    background-color: #0070c0 !important;
    color: #ffffff !important;
  }
  tr {
    page-break-inside: avoid !important;
  }
} /* Close @media print properly */

/* ==========================================================================
   LIVE B2-C2 VOCABULARY BANNER (RUNNING PARALLEL ON THE RIGHT)
   Khung từ vựng trực quan, nổi bật, dễ nhìn chuẩn theo web Hán ngữ
   ========================================================================== */
.vocab-banner-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-fast);
}

.vocab-banner-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.vocab-status-dot {
  color: #10b981;
  font-size: 15px;
  line-height: 1;
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(1.2); }
}

.vocab-time-chip {
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 12px;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid #bfdbfe;
  font-family: monospace;
}

.btn-banner-report-sm {
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 5px 11px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all var(--transition-fast);
}
.btn-banner-report-sm:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(37, 99, 235, 0.35);
}

.vocab-banner-summary-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background: rgba(248, 250, 252, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 10px;
}

.vocab-pills-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.vocab-pill {
  font-size: 11.5px;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 9999px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.vocab-pill.pill-b2 {
  background: #dbeafe;
  color: #1e40af;
  border-color: #93c5fd;
}
.vocab-pill.pill-c1 {
  background: #f3e8ff;
  color: #6b21a8;
  border-color: #d8b4fe;
}
.vocab-pill.pill-c2 {
  background: #ffe4e6;
  color: #9f1239;
  border-color: #fecdd3;
}

.vocab-view-toggle {
  display: flex;
  background: #e2e8f0;
  border-radius: 8px;
  padding: 3px;
  gap: 3px;
}

.vocab-toggle-btn {
  border: none;
  background: transparent;
  color: #475569;
  font-size: 11.5px;
  font-weight: 700;
  padding: 4px 11px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.vocab-toggle-btn.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 5px rgba(79, 70, 229, 0.3);
}

.vocab-cards-scroll {
  max-height: 320px;
  overflow-y: auto;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scrollbar-width: thin;
}

/* KHUNG TỪ VỰNG DỄ NHÌN (CARD FRAME) */
.vocab-item-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-left-width: 5px;
  border-radius: 12px;
  transition: all 0.2s ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.vocab-item-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
}

.vocab-item-card.level-b2 {
  border-left-color: #2563eb;
  background: linear-gradient(to right, #eff6ff, #ffffff 35%);
}
.vocab-item-card.level-c1 {
  border-left-color: #9333ea;
  background: linear-gradient(to right, #faf5ff, #ffffff 35%);
}
.vocab-item-card.level-c2 {
  border-left-color: #e11d48;
  background: linear-gradient(to right, #fff1f2, #ffffff 35%);
}

.vocab-item-main {
  flex: 1;
  min-width: 0;
}

.vocab-item-top {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 5px;
}

.vocab-item-word {
  font-size: 18px;
  font-weight: 800;
  color: #0f172a;
  letter-spacing: -0.3px;
}

.vocab-item-badge {
  font-size: 11px;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: 5px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.vocab-item-badge.badge-b2 { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }
.vocab-item-badge.badge-c1 { background: #f3e8ff; color: #6b21a8; border: 1px solid #e9d5ff; }
.vocab-item-badge.badge-c2 { background: #ffe4e6; color: #9f1239; border: 1px solid #fecdd3; }

.vocab-item-ipa {
  font-size: 12.5px;
  color: #475569;
  font-family: 'Consolas', 'Courier New', monospace;
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid #e2e8f0;
}

.vocab-item-pos {
  font-size: 11px;
  color: #64748b;
  font-style: italic;
  font-weight: 700;
  text-transform: uppercase;
}

.vocab-item-vi {
  font-size: 13.5px;
  font-weight: 700;
  color: #1e293b;
  line-height: 1.4;
  margin-top: 3px;
}

.vocab-item-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 12px;
}

.vocab-item-action-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  font-size: 14px;
  cursor: pointer;
  color: #334155;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.vocab-item-action-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  transform: scale(1.12);
}

.vocab-item-action-btn.btn-saved {
  background: #fef3c7;
  border-color: #fde68a;
  color: #d97706;
}

.vocab-item-card.active-in-cue {
  border-left-width: 6px;
  border-color: #3b82f6;
  background: linear-gradient(to right, #eff6ff, #ffffff 40%);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.2);
  transform: translateX(4px);
}

.vocab-active-tag {
  background: #2563eb;
  color: #ffffff;
  font-size: 10px;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.3px;
  animation: pulseTag 1.5s infinite;
}

@keyframes pulseTag {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.75; transform: scale(1.08); }
}

.vocab-item-ex-preview {
  font-size: 12px;
  color: #475569;
  margin-top: 4px;
  line-height: 1.35;
  background: #f8fafc;
  padding: 4px 8px;
  border-radius: 5px;
  border-left: 2.5px solid #cbd5e1;
}

.nb-example-box {
  background: #f8fafc;
  border-left: 3px solid #3b82f6;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.4;
}

/* ============================================================== */
/* AUTHENTIC LEXIBOT DOCUMENT A4 MULTI-PAGE STYLING (EXACT REPLICA)*/
/* ============================================================== */
.lexibot-doc-wrapper {
  background: #525659;
  padding: 32px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  border-radius: var(--radius-md);
  margin-top: 20px;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
}

.lexibot-a4-page {
  background: #ffffff;
  color: #1e293b;
  width: 100%;
  max-width: 820px;
  min-height: 1120px;
  margin: 0 auto 32px auto;
  padding: 56px 64px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.25);
  border-radius: 2px;
  position: relative;
  font-family: Calibri, 'Segoe UI', Arial, sans-serif;
  font-size: 11.5pt;
  line-height: 1.6;
  box-sizing: border-box;
}

/* Corner crop marks like Microsoft Word print layout */
.corner-crop-mark {
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
}
.corner-crop-mark.top-left {
  top: 28px;
  left: 28px;
  border-top: 1px solid #94a3b8;
  border-left: 1px solid #94a3b8;
}
.corner-crop-mark.top-right {
  top: 28px;
  right: 28px;
  border-top: 1px solid #94a3b8;
  border-right: 1px solid #94a3b8;
}
.corner-crop-mark.bottom-left {
  bottom: 28px;
  left: 28px;
  border-bottom: 1px solid #94a3b8;
  border-left: 1px solid #94a3b8;
}
.corner-crop-mark.bottom-right {
  bottom: 28px;
  right: 28px;
  border-bottom: 1px solid #94a3b8;
  border-right: 1px solid #94a3b8;
}

/* Document typography matching authentic LexiBot Word files */
.doc-header-blue .doc-topic-date {
  font-size: 16pt;
  font-weight: bold;
  color: #0070c0;
  text-decoration: underline;
  margin: 0 0 12px 0;
}
.doc-prompt-box {
  font-size: 11.5pt;
  color: #1e293b;
  line-height: 1.55;
  margin-bottom: 24px;
}
.doc-h3-blue {
  font-size: 15pt;
  font-weight: bold;
  color: #1f4d78;
  margin: 20px 0 10px 0;
}
.doc-h2-black {
  font-size: 17pt;
  font-weight: bold;
  color: #0f172a;
  margin: 24px 0 10px 0;
}
.doc-h3-teal {
  font-size: 14.5pt;
  font-weight: bold;
  color: #007a7a;
  margin: 18px 0 6px 0;
}
.doc-h4-crimson {
  font-size: 12.5pt;
  font-weight: bold;
  color: #c00000;
  margin: 16px 0 4px 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.doc-h5-dark {
  font-size: 11.5pt;
  font-weight: bold;
  color: #334155;
  margin: 10px 0 4px 0;
}
.doc-badge-crimson {
  font-size: 11.5pt;
  font-weight: bold;
  color: #c00000;
  margin: 4px 0 8px 0;
}
.doc-body-text {
  font-size: 11.5pt;
  color: #1e293b;
  line-height: 1.6;
  margin-bottom: 10px;
}
.doc-essay-body p {
  font-size: 11.5pt;
  color: #1e293b;
  line-height: 1.65;
  margin-bottom: 12px;
  text-align: justify;
}
.doc-bullet-list {
  margin: 6px 0 14px 24px;
  padding: 0;
  list-style-type: disc;
}
.doc-bullet-list li {
  margin-bottom: 5px;
  font-size: 11pt;
  color: #334155;
  line-height: 1.5;
}

/* Improve Word Choice inline tags */
.doc-word-choice-body p {
  font-size: 11.5pt;
  line-height: 1.7;
  margin-bottom: 14px;
  text-align: justify;
}
.lexi-wc-pair {
  display: inline;
  margin: 0 1px;
}
.lexi-strike {
  color: #d32f2f;
  text-decoration: line-through;
  margin-right: 2px;
  font-weight: 500;
}
.lexi-upgrade {
  color: #b71c1c;
  font-weight: bold;
}

/* Tables matching Word export */
.doc-lexi-table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 20px 0;
  font-size: 10.5pt;
}
.doc-lexi-table th {
  border: 1px solid #cbd5e1;
  background: #f8fafc;
  color: #0f172a;
  padding: 9px 12px;
  font-weight: bold;
  text-align: left;
}
.doc-lexi-table td {
  border: 1px solid #cbd5e1;
  padding: 8px 12px;
  vertical-align: top;
  line-height: 1.45;
  color: #334155;
}

/* Quotes */
.doc-quote-student {
  margin: 8px 0 12px 0;
  padding: 8px 14px;
  background: #f8fafc;
  border-left: 3px solid #94a3b8;
  font-style: italic;
  color: #334155;
  font-size: 11pt;
  border-radius: 2px;
}
.doc-quote-rewrite {
  margin: 8px 0 14px 0;
  padding: 10px 16px;
  background: #f0fdf4;
  border-left: 3px solid #22c55e;
  font-style: italic;
  color: #166534;
  font-size: 11pt;
  font-weight: 500;
  border-radius: 2px;
  line-height: 1.6;
}

/* Print layout for PDF / Paper */
@media print {
  body * {
    visibility: hidden;
  }
  .lexibot-doc-wrapper, .lexibot-doc-wrapper * {
    visibility: visible;
  }
  .lexibot-doc-wrapper {
    position: absolute;
    left: 0;
    top: 0;
    background: none;
    padding: 0;
    margin: 0;
  }
  .lexibot-a4-page {
    box-shadow: none;
    margin: 0;
    page-break-after: always;
    padding: 40px;
    border: none;
  }
  .corner-crop-mark {
    display: none;
  }
}