:root {
  /* Morandi / Calming Palette setup */
  --bg-primary: #fdfbf7;
  --bg-secondary: #f4f1ea;
  --text-primary: #3d3b38;
  --text-secondary: #76736e;
  --accent-calm: #a3b1a6; /* Soft sage green */
  --accent-warm: #d4bda5; /* Soft earth tone */
  --card-shadow: 0 4px 12px rgba(61, 59, 56, 0.05);
  
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 20px;
  --spacing-lg: 32px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1c1a19;
    --bg-secondary: #2a2826;
    --text-primary: #eae5de;
    --text-secondary: #a39e98;
    --accent-calm: #7d8f80; /* Darker sage */
    --accent-warm: #a68d73; /* Darker earth */
    --card-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 80% 0%, rgba(163, 177, 166, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 20% 100%, rgba(212, 189, 165, 0.08) 0%, transparent 50%);
  color: var(--text-primary);
  line-height: 1.6;
  overscroll-behavior-y: none;
  transition: background-color 0.4s ease;
}

#app {
  max-width: 600px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

/* Header */
.app-header {
  padding: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: rgba(253, 251, 247, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Noto Serif TC', serif;
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--accent-calm);
}

.icon-btn {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: opacity 0.2s;
}

.icon-btn:hover {
  opacity: 0.7;
}

/* View Container */
.view-container {
  flex: 1;
  position: relative;
  overflow-y: auto;
  padding: 0 var(--spacing-md) var(--spacing-lg);
}

.view {
  display: none;
  animation: slideFadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.view.active {
  display: block;
}

@keyframes slideFadeIn {
  from { opacity: 0; transform: translateY(12px) scale(0.99); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Hero Section */
.hero-section {
  padding: var(--spacing-md) 0 var(--spacing-lg);
}

.hero-greeting {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.hero-sub {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Cards */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--card-shadow);
  cursor: pointer;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(61, 59, 56, 0.08);
}

.card:active {
  transform: scale(0.98);
}

.card-icon {
  font-size: 1.8rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: 50%;
}

.card-content {
  flex: 1;
}

.card-title {
  font-weight: 600;
  font-size: 1.1rem;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.card-action {
  font-size: 1.5rem;
  color: var(--accent-calm);
}

/* Add Quote View */
.view-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--spacing-md);
}

.back-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.view-title {
  font-size: 1.4rem;
  font-family: 'Noto Serif TC', serif;
  margin-bottom: 8px;
}

.view-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.modern-textarea {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
  color: var(--text-primary);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
  transition: border-color 0.3s;
}

.modern-textarea:focus {
  outline: none;
  border-color: var(--accent-calm);
}

.modern-input {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--bg-secondary);
  border-radius: 8px;
  padding: 12px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
}

.add-actions {
  margin-top: var(--spacing-md);
  display: flex;
  justify-content: flex-end;
}

.primary-btn {
  background: var(--accent-calm);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: opacity 0.2s, transform 0.2s;
}

.primary-btn:active {
  transform: scale(0.97);
}

.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Glass Panel for AI output */
.glass-panel {
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

@media (prefers-color-scheme: dark) {
  .glass-panel {
    background: rgba(42, 40, 38, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
  }
}

.chunk-title {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.chunk-instruction {
  font-size: 0.9rem;
  color: var(--accent-calm);
  margin-bottom: 12px;
  font-weight: 500;
}

.chunked-quote {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.chunk-line {
  display: block;
  margin-bottom: 8px;
  padding-left: 12px;
  border-left: 3px solid var(--accent-calm);
}

.tts-btn {
  background: var(--bg-secondary);
  border: none;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Reflection Prompt */
.scenario-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}

.scenario-chip {
  background: #ffffff;
  border: 2px solid var(--bg-secondary);
  padding: 12px 16px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: normal;
  word-break: break-word;
  line-height: 1.4;
  text-align: left;
}

.scenario-chip.selected {
  border-color: var(--accent-warm);
  background: #fdf8f4;
}

/* Settings Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.3);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn 0.2s ease;
}

.modal-content {
  background: var(--bg-primary);
  width: 90%;
  max-width: 400px;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
}

.help-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.sys-prompt-preview {
  background: var(--bg-secondary);
  padding: 12px;
  border-radius: 8px;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: white;
  padding: 12px 24px;
  border-radius: 30px;
  font-size: 0.9rem;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 2000;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Stats Overview */
.stats-overview {
  display: flex;
  gap: 16px;
}

.stat-item {
  flex: 1;
  background: #ffffff;
  padding: 16px;
  border-radius: 16px;
  text-align: center;
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--accent-calm);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Review Flow Specifics */
.wake-up-msg {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 20px;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: 12px;
}

.cloze-display {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.3rem;
  line-height: 1.8;
  margin-bottom: 30px;
  text-align: center;
}

/* Dynamic Resizer Hack */
.cloze-resizer {
  display: inline-grid;
  align-items: center;
  justify-items: center;
  margin: 0 4px;
}

.cloze-resizer::after,
.cloze-resizer .cloze-input {
  width: auto;
  min-width: 100%;
  grid-area: 1 / 1;
  font: inherit;
  padding: 0 4px;
  margin: 0;
  text-align: center;
}

.cloze-resizer::after {
  content: attr(data-value) " "; 
  visibility: hidden;
  white-space: pre-wrap;
  min-width: calc(var(--min-chars) * 1.5ch);
}

.cloze-input {
  border: none;
  border-bottom: 2px solid var(--accent-warm);
  background: transparent;
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s;
}

.cloze-input:focus {
  border-bottom: 2px solid var(--accent-calm);
  background: rgba(163, 177, 166, 0.1);
}

@keyframes popSuccess {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); color: #4CAF50; }
  100% { transform: scale(1); }
}

.cloze-input.correct {
  color: #5d7e67;
  border-bottom-color: #5d7e67;
  font-weight: 600;
  text-shadow: 0 0 8px rgba(93, 126, 103, 0.2);
  pointer-events: none;
  animation: popSuccess 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.cloze-input.revealed {
  color: var(--text-secondary);
  border-bottom-color: transparent;
}

.review-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
}

.tts-btn.large {
  padding: 12px 30px;
  font-size: 1.1rem;
  background: #ffffff;
  border: 2px solid var(--bg-secondary);
  border-radius: 30px;
}

.text-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  text-decoration: underline;
  cursor: pointer;
  padding: 8px;
}

.grade-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.grade-btn {
  border: none;
  padding: 16px;
  border-radius: 16px;
  font-size: 1.1rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform 0.2s, background 0.3s;
}

.grade-btn small {
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0.8;
  margin-top: 4px;
}

.grade-btn.forgot {
  background: #f5f5f5;
  color: #76736e;
}

.grade-btn.medium {
  background: #e8f0ea;
  color: #5d7e67;
}

.grade-btn.easy {
  background: #fdf8f4;
  color: #c49c76;
}

.grade-btn:active {
  transform: scale(0.98);
}

/* Chunking UI Styles (Blur effect) */
.chunking-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 40px;
}

.chunk-focus-area {
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 30px;
  padding: 24px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  width: 100%;
}

.chunk-text-display {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.6rem;
  line-height: 1.6;
  text-align: center;
  color: var(--text-primary);
  transition: all 0.5s ease;
}

/* Blur Effect for State 2 */
.chunk-text-display.text-blur {
  color: transparent !important;
  text-shadow: 0 0 18px rgba(61, 59, 56, 0.6);
  user-select: none;
}

.chunk-instruction-text {
  font-size: 0.95rem;
  color: var(--accent-calm);
  margin-bottom: 24px;
  text-align: center;
}

.chunk-controls {
  width: 100%;
  max-width: 300px;
}

.chunk-state-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* --- New Dashboard Sections --- */
.dashboard-section-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 24px 0 12px 4px;
}

/* Quick Access Pills */
.pills-container {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
  margin-bottom: var(--spacing-md);
  /* Hide scrollbar */
  scrollbar-width: none; 
}
.pills-container::-webkit-scrollbar {
  display: none; 
}
.pill-btn {
  background: var(--bg-secondary);
  border: 1px solid rgba(0,0,0,0.05);
  padding: 10px 16px;
  border-radius: 30px;
  font-size: 0.95rem;
  white-space: nowrap;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s;
}
.pill-btn:active {
  transform: scale(0.95);
  background: var(--accent-calm);
  color: white;
}

/* --- Library View --- */
.library-chips {
  display: flex;
  flex-wrap: wrap; /* Wrap instead of horizontal scroll */
  gap: 8px;
  padding-bottom: 12px;
  margin-bottom: var(--spacing-md);
}
.lib-chip {
  padding: 6px 14px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--bg-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  white-space: normal;
  word-break: break-word;
  max-width: 100%;
  line-height: 1.4;
  text-align: left;
}
.lib-chip.active {
  background: var(--accent-calm);
  color: white;
  border-color: var(--accent-calm);
}
.library-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.lib-card {
  background: #fff;
  padding: 16px;
  border-radius: 16px;
  box-shadow: var(--card-shadow);
}
.lib-card-quote {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.1rem;
  margin-bottom: 12px;
  line-height: 1.6;
}
.lib-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* --- Slideshow View --- */
#view-slideshow {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(40, 38, 36, 0.98); /* dark immersive */
  z-index: 2000;
  color: #fff;
  display: none; /* toggled by .active */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 40px;
}
#view-slideshow.active {
  display: flex;
  animation: fadeIn 0.5s ease forwards;
}
.slide-close {
  position: absolute;
  top: 40px;
  right: 20px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.6);
  font-size: 1.5rem;
  cursor: pointer;
}
.slide-content {
  text-align: center;
  max-width: 400px;
  width: 100%;
}
.slide-anchor-label {
  font-size: 0.85rem;
  color: var(--accent-calm);
  margin-bottom: 24px;
  letter-spacing: 2px;
}
.slide-quote {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.8rem;
  line-height: 1.6;
  margin-bottom: 40px;
  animation: floatUp 1s ease-out;
}
.slide-nav {
  display: flex;
  justify-content: center;
  gap: 40px;
  align-items: center;
}
.slide-nav-btn {
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.2s;
}
.slide-nav-btn:hover { opacity: 1; }

@keyframes floatUp {
  0% { opacity: 0; transform: translateY(20px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* --- Gacha View --- */
#view-gacha {
  text-align: center;
  padding-top: 40px;
}
.gacha-prompt {
  font-size: 1.2rem;
  margin-bottom: 24px;
  color: var(--text-secondary);
}
.gacha-options {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.gacha-result {
  margin-top: 60px;
  opacity: 0;
  transform: scale(0.95);
  transition: all 1.5s ease-out;
}
.gacha-result.reveal {
  opacity: 1;
  transform: scale(1);
}
.gacha-result .lib-card-quote {
  font-size: 1.6rem;
}

/* --- Omni Quiz --- */
.quiz-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 120px);
  padding-top: 10px;
}
.quiz-hint {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-align: center;
  font-weight: 500;
}
.quiz-prompt {
  font-size: 1.15rem;
  font-weight: 500;
  text-align: center;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1.7;
}
.quiz-cloze-blank {
  display: inline-block;
  min-width: 60px;
  border-bottom: 2px solid var(--text-primary);
  margin: 0 4px;
}
.quiz-cloze-blank.filled {
  color: var(--accent-calm);
  border-color: transparent;
  font-weight: 600;
}
.quiz-options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: auto;
  padding-bottom: 20px;
}
.quiz-btn {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  line-height: 1.5;
  box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}
.quiz-btn:active {
  transform: scale(0.98);
}
.quiz-btn.correct {
  background: var(--accent-calm) !important;
  color: #fff !important;
  border-color: var(--accent-calm) !important;
  transform: scale(1.02);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}
.quiz-btn.wrong {
  opacity: 0.5;
  animation: shake 0.4s;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

/* --- Global Ambient Player --- */
.ambient-widget {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.ambient-toggle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--bg-secondary);
  color: var(--text-primary);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.ambient-toggle:hover {
  transform: scale(1.05);
}

.ambient-toggle.playing {
  background: var(--accent-calm);
  color: #fff;
  border-color: var(--accent-calm);
  animation: pulse 2s infinite;
}

.ambient-panel {
  display: none; /* toggled by JS */
  flex-direction: column;
  width: 260px;
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.85); /* fallback for glass */
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.ambient-widget.open .ambient-panel {
  display: flex;
  animation: slideFadeUp 0.3s ease-out forwards;
}

.ambient-header {
  text-align: center;
  margin-bottom: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.ambient-tracks {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
  max-height: 45vh; /* Prevent overflowing the screen */
  overflow-y: auto;
  padding-right: 4px;
}

.ambient-tracks.hidden {
  display: none !important;
}

.ambient-dropdown-btn {
  background: var(--bg-secondary);
  border: 1px solid rgba(0,0,0,0.05);
  padding: 12px 16px;
  border-radius: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  color: var(--text-primary);
  font-size: 0.95rem;
  cursor: pointer;
  margin-bottom: 16px;
  transition: all 0.2s;
}
.ambient-dropdown-btn span {
  display: flex;
  align-items: center;
  gap: 8px;
}
.ambient-dropdown-btn:hover {
  background: var(--bg-primary);
}

/* Custom scrollbar for ambient tracks */
.ambient-tracks::-webkit-scrollbar {
  width: 4px;
}
.ambient-tracks::-webkit-scrollbar-thumb {
  background: var(--bg-secondary);
  border-radius: 4px;
}

.ambient-track-btn {
  background: var(--bg-secondary);
  border: none;
  padding: 10px 16px;
  border-radius: 12px;
  text-align: left;
  font-size: 0.95rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.ambient-track-btn.active {
  background: var(--accent-warm);
  color: #fff;
  font-weight: 500;
}

.ambient-volume {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.ambient-volume input[type="range"] {
  flex: 1;
  accent-color: var(--accent-calm);
}

.ambient-stop-btn {
  background: none;
  border: 1px solid rgba(0,0,0,0.1);
  padding: 8px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

.ambient-stop-btn:hover {
  background: var(--bg-secondary);
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(93,126,103, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(93,126,103, 0); }
  100% { box-shadow: 0 0 0 0 rgba(93,126,103, 0); }
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  text-align: center;
  color: var(--text-secondary);
}
.empty-state i {
  font-size: 3.5rem;
  margin-bottom: 16px;
  opacity: 0.6;
}
.empty-state p {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Dark Mode Overrides for Specific Components */
@media (prefers-color-scheme: dark) {
  .card, .modern-textarea, .modern-input, .lib-card, .stat-item, .scenario-chip, .lib-chip {
    background: var(--bg-secondary) !important;
    border-color: rgba(255,255,255,0.05) !important;
  }
  .app-header {
    background: rgba(28, 26, 25, 0.9);
  }
  .chunk-focus-area {
    background: var(--bg-secondary);
  }
  .primary-btn {
    color: #1a1a1a;
  }
  #chunk-state-hide .primary-btn {
    background: transparent !important;
    color: var(--text-primary) !important;
  }
  .card:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
  }
  .toast {
    background: #e0e0e0;
    color: #1a1a1a;
  }
  .pills-container .pill-btn {
    background: var(--bg-secondary);
    border-color: rgba(255,255,255,0.05);
  }
  .quiz-btn {
    background: var(--bg-secondary);
    border-color: rgba(255,255,255,0.05);
  }
  .ambient-panel {
    background: rgba(40, 38, 36, 0.85);
  }
}