:root {
  --bg-main: #0b0f19;
  --bg-card: #131b2e;
  --bg-elevated: #1b253d;
  --bg-input: #0e1525;
  --border-subtle: #283552;
  --border-focus: #38bdf8;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #8fa2bc;
  --accent-primary: #38bdf8;
  --accent-primary-hover: #0ea5e9;
  --accent-emerald: #10b981;
  --accent-emerald-bg: rgba(16, 185, 129, 0.16);
  --accent-rose: #f43f5e;
  --accent-rose-bg: rgba(244, 63, 94, 0.22);
  --accent-amber: #f59e0b;
  --accent-amber-bg: rgba(245, 158, 11, 0.16);
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.55);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, 'Courier New', monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(56, 189, 248, 0.28) rgba(14, 21, 37, 0.5);
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: rgba(14, 21, 37, 0.5);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb {
  background: rgba(56, 189, 248, 0.28);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(56, 189, 248, 0.5);
}

body {
  background: radial-gradient(circle at top right, #16213e 0%, var(--bg-main) 55%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.5;
}

.hidden {
  display: none !important;
}

.app-shell {
  max-width: 1380px;
  margin: 0 auto;
  padding: 18px 24px 36px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  background: rgba(19, 27, 46, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 12px 20px;
  box-shadow: var(--shadow-card);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1rem;
  color: #fff;
  letter-spacing: -0.5px;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-local {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.brand-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

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

.btn-primary {
  background: linear-gradient(135deg, #0ea5e9, #2563eb);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.12);
}

.btn-secondary {
  background: var(--bg-elevated);
  border-color: var(--border-subtle);
}

.btn-icon {
  background: var(--bg-elevated);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-icon:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent-primary);
}

.btn-warning {
  background: var(--accent-amber-bg);
  color: #fbbf24;
  border-color: rgba(245, 158, 11, 0.35);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border-subtle);
  color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

#btn-reset-progress {
  color: #fda4af;
  border-color: rgba(244, 63, 94, 0.28);
  background: rgba(244, 63, 94, 0.06);
}

#btn-reset-progress:hover:not(:disabled) {
  background: rgba(244, 63, 94, 0.16);
  border-color: rgba(244, 63, 94, 0.5);
  color: #ffffff;
}

.btn-pill {
  border-radius: 999px;
  border-color: var(--border-subtle);
  padding: 7px 15px;
}

.btn-pill.active {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--accent-emerald);
  color: #34d399;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.btn-pill.active .status-dot {
  background: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
}

/* Status Banner */
.status-banner {
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background: rgba(56, 189, 248, 0.14);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: #e0f2fe;
  font-size: 0.88rem;
}

.status-banner.error {
  background: rgba(244, 63, 94, 0.16);
  border-color: rgba(244, 63, 94, 0.45);
  color: #fecdd3;
}

/* YouTube + Local VTT Practice Bar */
.youtube-practice-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  box-shadow: var(--shadow-card);
}

.yt-bar-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.yt-url-group {
  flex: 1;
  min-width: 280px;
}

.yt-bar-label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.yt-url-input {
  flex: 1;
  min-width: 220px;
}

.vtt-upload-btn {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.sr-only-file {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}

.vtt-status-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.subtitle-empty-notice {
  color: #fbbf24;
  font-family: var(--font-sans);
  font-size: 0.98rem;
}

.youtube-practice-bar.drag-over,
.subtitle-display.drag-over {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.28);
  background: rgba(56, 189, 248, 0.08);
}

/* Phase 3: Collapsible Subtitle Paste & Direct URL Drawer */
.subtitle-drawer {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  box-shadow: var(--shadow-card);
}

.drawer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.drawer-column {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.drawer-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.drawer-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
}

.drawer-tip {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.subtitle-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 10px 12px;
  resize: vertical;
  min-height: 86px;
}

.subtitle-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
}

.drawer-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.drawer-note {
  font-size: 0.77rem;
  color: var(--text-muted);
  line-height: 1.45;
  background: rgba(14, 21, 37, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}

@media (max-width: 900px) {
  .drawer-grid {
    grid-template-columns: 1fr;
  }
}

/* Overall Lesson Progress */
.overall-progress-section {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 18px;
}

.overall-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.86rem;
  margin-bottom: 8px;
}

.lesson-title {
  font-weight: 600;
  color: var(--text-primary);
}

.overall-progress-text {
  color: var(--accent-primary);
  font-weight: 600;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: var(--bg-input);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #38bdf8, #10b981);
  border-radius: 999px;
  transition: width 0.3s ease;
}

/* Main Workspace Layout */
.workspace {
  display: grid;
  grid-template-columns: 1fr 370px;
  gap: 18px;
  align-items: start;
}

.stage-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.video-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 410px;
  background: #050811;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-element {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.youtube-container {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.youtube-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.player-loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(5, 8, 17, 0.82);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  z-index: 5;
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 600;
}

.player-loading-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid rgba(56, 189, 248, 0.25);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: vt-spin 0.8s linear infinite;
}

@keyframes vt-spin {
  to {
    transform: rotate(360deg);
  }
}

.video-overlay-Hud {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.hud-badge {
  background: rgba(11, 15, 25, 0.78);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: #e2e8f0;
}

.hud-time {
  font-family: var(--font-mono);
}

.transport-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(14, 21, 37, 0.9);
  border-top: 1px solid var(--border-subtle);
}

.transport-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.speed-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.speed-select {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

/* Typing Exercise Card */
.typing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.typing-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.cue-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.cue-pill {
  background: rgba(56, 189, 248, 0.14);
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 0.8rem;
  padding: 3px 10px;
  border-radius: 999px;
}

.cue-timestamp {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.cue-completed-badge {
  background: var(--accent-emerald-bg);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.35);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 999px;
}

.typing-card-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Subtitle Display with Character States */
.subtitle-display {
  min-height: 78px;
  padding: 18px 20px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 1.32rem;
  line-height: 1.65;
  letter-spacing: 0.01em;
  user-select: none;
  word-break: break-word;
}

.char-span {
  display: inline;
  padding: 1px 0;
  border-radius: 3px;
  transition: background-color 0.08s ease, color 0.08s ease;
}

.char-span.pending {
  color: var(--text-secondary);
}

.char-span.current {
  color: #ffffff;
  background: rgba(56, 189, 248, 0.25);
  border-bottom: 2px solid var(--accent-primary);
}

.char-span.correct {
  color: #34d399;
  background: rgba(16, 185, 129, 0.12);
}

.char-span.incorrect {
  color: #fda4af;
  background: var(--accent-rose-bg);
  border-bottom: 2px solid var(--accent-rose);
}

.char-span.extra {
  color: #fda4af;
  background: rgba(244, 63, 94, 0.35);
  text-decoration: line-through;
}

/* Listening mode masked character */
.char-span.masked {
  color: transparent;
  background: rgba(148, 163, 184, 0.22);
  border-radius: 4px;
  margin: 0 1px;
}

.char-span.masked.current {
  background: rgba(56, 189, 248, 0.35);
  border-bottom: 2px solid var(--accent-primary);
}

.listening-banner {
  font-size: 0.83rem;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #fde68a;
}

/* Typing Input */
.input-wrapper {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.typing-input {
  width: 100%;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 1.12rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.typing-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
}

.typing-input.input-error {
  border-color: var(--accent-rose);
  box-shadow: 0 0 0 3px rgba(244, 63, 94, 0.18);
}

.typing-input.input-complete {
  border-color: var(--accent-emerald);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.22);
}

.input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 12px;
  font-size: 0.82rem;
}

.typing-feedback {
  color: var(--text-secondary);
  flex: 1;
  min-width: 140px;
}

.typing-feedback.feedback-good {
  color: #34d399;
  font-weight: 600;
}

.typing-feedback.feedback-error {
  color: #fb7185;
  font-weight: 600;
}

.sentence-progress-pct {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  white-space: nowrap;
}

.shortcuts-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.76rem;
  color: var(--text-muted);
}

kbd {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--text-primary);
}

/* Sidebar Panels */
.library-panel,
.stats-panel,
.settings-panel,
.transcript-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-card);
}

.panel-heading {
  font-size: 0.92rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.stat-box {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 82px;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.stat-value {
  font-size: 1.35rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 4px 8px;
}

.stat-value:has(#stat-accuracy),
.stat-unit-group {
  gap: 0;
}

.stat-sub {
  font-size: 0.72rem;
  color: var(--accent-primary);
  font-weight: 600;
  white-space: nowrap;
}

/* Settings Panel */
.settings-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.setting-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-primary);
  cursor: pointer;
}

.setting-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent-primary);
  cursor: pointer;
}

/* Transcript Cue List */
.transcript-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.transcript-header .panel-heading {
  margin-bottom: 0;
}

.badge-count {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text-secondary);
}

.transcript-panel {
  display: flex;
  flex-direction: column;
}

.cue-list {
  list-style: none;
  max-height: 380px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-right: 4px;
}

.cue-item {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.14s ease;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cue-item:hover {
  border-color: var(--border-subtle);
  background: var(--bg-elevated);
}

.cue-item.active {
  border-color: var(--accent-primary);
  background: rgba(56, 189, 248, 0.12);
  box-shadow: inset 3px 0 0 var(--accent-primary);
}

.cue-item.completed {
  border-color: rgba(16, 185, 129, 0.22);
}

.cue-item.completed .cue-item-status {
  color: var(--accent-emerald);
  font-weight: 600;
}

.cue-item-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.cue-item-text {
  font-size: 0.86rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.cue-item.masked-cue .cue-item-text {
  color: var(--text-muted);
  font-style: italic;
}

.cue-list-empty {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px dashed var(--border-subtle);
  text-align: center;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 17, 0.78);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

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

.modal-header h2 {
  font-size: 1.05rem;
}

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

.source-block h3 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.source-block p {
  font-size: 0.83rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.modal-divider {
  border: none;
  border-top: 1px solid var(--border-subtle);
}

.file-inputs {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.file-label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.83rem;
  color: var(--text-primary);
}

.yt-input-row {
  display: flex;
  gap: 8px;
}

.text-input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}

/* Phase 4: Local Video Re-selection Notice Banner */
.local-reattach-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 16px;
  border-radius: var(--radius-md);
  background: rgba(245, 158, 11, 0.14);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fde68a;
  font-size: 0.85rem;
}

.local-reattach-content {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

.local-reattach-icon {
  font-size: 1.15rem;
}

.local-reattach-text {
  line-height: 1.45;
}

.local-reattach-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

/* Phase 4: Saved Lesson Library ("My Lessons") */
.save-lesson-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.saved-lessons-empty {
  font-size: 0.81rem;
  color: var(--text-muted);
  line-height: 1.45;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px dashed var(--border-subtle);
}

.saved-lessons-list {
  list-style: none;
  max-height: 300px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-right: 4px;
}

.saved-lesson-item {
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 7px;
  transition: border-color 0.14s ease, background-color 0.14s ease;
}

.saved-lesson-item.active-saved-lesson {
  border-color: var(--accent-primary);
  background: rgba(56, 189, 248, 0.08);
}

.saved-lesson-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.saved-lesson-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  word-break: break-word;
}

.saved-lesson-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.lesson-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.lesson-badge.badge-youtube {
  background: rgba(244, 63, 94, 0.14);
  color: #fda4af;
  border-color: rgba(244, 63, 94, 0.35);
}

.lesson-badge.badge-local {
  background: rgba(56, 189, 248, 0.14);
  color: #7dd3fc;
  border-color: rgba(56, 189, 248, 0.35);
}

.lesson-badge.badge-subs-ok {
  background: rgba(16, 185, 129, 0.12);
  color: #6ee7b7;
  border-color: rgba(16, 185, 129, 0.32);
}

.lesson-badge.badge-subs-missing {
  background: rgba(245, 158, 11, 0.14);
  color: #fde68a;
  border-color: rgba(245, 158, 11, 0.35);
}

.saved-lesson-progress-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.saved-lesson-progress-text {
  font-size: 0.76rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.saved-lesson-progress-track {
  height: 5px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
}

.saved-lesson-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-emerald));
  border-radius: 999px;
  transition: width 0.2s ease;
}

.saved-lesson-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 2px;
}

.btn-xs {
  padding: 4px 9px;
  font-size: 0.75rem;
  border-radius: 6px;
}

.btn-danger {
  background: rgba(244, 63, 94, 0.2);
  color: #fda4af;
  border: 1px solid rgba(244, 63, 94, 0.45);
}

.btn-danger:hover:not(:disabled) {
  background: rgba(244, 63, 94, 0.35);
  color: #ffffff;
}

.lesson-edit-row,
.lesson-delete-confirm-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  flex-wrap: wrap;
}

.confirm-delete-label {
  font-size: 0.78rem;
  color: #fda4af;
  font-weight: 600;
  flex: 1;
}

/* Phase 5: Targeted Weak Sentence Review Mode Banner */
.review-mode-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid rgba(168, 85, 247, 0.45);
  color: #e9d5ff;
  font-size: 0.85rem;
}

.review-mode-info {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.review-mode-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(168, 85, 247, 0.35);
  color: #f3e8ff;
  border: 1px solid rgba(168, 85, 247, 0.6);
  white-space: nowrap;
}

.review-mode-text {
  line-height: 1.4;
  color: #f3e8ff;
}

.review-mode-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* Phase 5: WPM & Accuracy Trend Box & Daily Activity */
.stats-trend-box {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stats-trend-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stats-trend-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.stats-trend-text {
  font-size: 0.82rem;
  color: var(--text-primary);
  line-height: 1.45;
}

.daily-activity-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 4px;
}

.daily-activity-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.76rem;
  padding: 4px 8px;
  border-radius: 4px;
  background: var(--bg-input);
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.daily-activity-item .activity-date,
.daily-activity-item .daily-activity-date {
  color: var(--text-primary);
  font-weight: 600;
}

/* Phase 5: Weak Sentence Review Panel */
.weak-sentences-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.weak-review-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.weak-sentences-list {
  list-style: none;
  max-height: 280px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-right: 4px;
}

.weak-sentence-item {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.14s ease;
}

.weak-sentence-item.reviewed-clean {
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.05);
}

.weak-sentence-meta,
.weak-sentence-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.weak-sentence-source {
  color: var(--accent-primary);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.weak-sentence-stats {
  color: #fda4af;
  font-weight: 600;
  white-space: nowrap;
}

.weak-sentence-text {
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.weak-sentence-actions,
.weak-sentence-footer {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
  padding-top: 2px;
}

.weak-tag-danger {
  color: #fda4af;
  font-weight: 600;
}

.weak-tag-success {
  color: #6ee7b7;
  font-weight: 600;
}

@media (max-width: 1024px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .app-shell {
    padding: 14px 14px 28px;
    gap: 14px;
  }

  .topbar {
    padding: 12px 14px;
    gap: 10px;
  }

  .overall-progress-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .typing-card {
    padding: 14px;
  }

  .subtitle-display {
    padding: 14px;
    font-size: 1.18rem;
  }

  .cue-list {
    max-height: 280px;
  }
}

@media (max-width: 480px) {
  .transport-bar {
    padding: 10px 12px;
    gap: 10px;
  }

  .transport-bar > .transport-group:first-child {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    gap: 8px;
  }

  .transport-bar > .transport-group:first-child .btn {
    width: 100%;
    padding: 8px 6px;
    font-size: 0.8rem;
  }

  .transport-right {
    width: 100%;
    justify-content: center;
  }

  .typing-card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .typing-card-tools {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .yt-url-group {
    min-width: 0;
    width: 100%;
  }

  .yt-url-input {
    min-width: 0;
    width: 100%;
  }

  .yt-vtt-group {
    width: 100%;
  }

  .vtt-upload-btn {
    width: 100%;
    text-align: center;
  }
}