/* LinguaDrill Combined CSS */

/* === src/styles/main.css === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #4F46E5;
  --primary-light: #EEF2FF;
  --primary-dark: #3730A3;
  --secondary-color: #10B981;
  --accent-color: #F59E0B;
  --bg-color: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --text-primary: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border-color: #E2E8F0;
  --success-color: #10B981;
  --warning-color: #F59E0B;
  --error-color: #EF4444;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  font-size: 1.5rem;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
}

.navbar-links {
  display: none;
  gap: 0.5rem;
}

.nav-btn {
  background: none;
  border: none;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.nav-btn:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.nav-btn.active {
  background-color: var(--primary-light);
  color: var(--primary-color);
}

.navbar-right {
  display: flex;
  align-items: center;
}

.lang-btn {
  background: none;
  border: 1px solid var(--border-color);
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.lang-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

main {
  margin-top: 5rem;
  min-height: calc(100vh - 5rem - 4rem);
}

.page {
  display: none;
  padding: 1.5rem;
}

.page.active {
  display: block;
}

.hero {
  text-align: center;
  padding: 3rem 1rem;
  background: linear-gradient(135deg, var(--primary-light) 0%, #F0FDFA 100%);
  border-radius: var(--radius-xl);
  margin-bottom: 2rem;
}

.hero-content {
  margin-bottom: 2rem;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.title-icon {
  font-size: 3rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.cta-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-md);
}

.cta-btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.hero-visual {
  display: none;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  text-align: center;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.philosophy-card {
  background: var(--bg-color);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.philosophy-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.philosophy-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.philosophy-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.feature-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.feature-card {
  background: var(--bg-color);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s ease;
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.stats-section {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  background: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.page-header {
  text-align: center;
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.page-header p {
  font-size: 1rem;
  color: var(--text-secondary);
}

.words-container,
.patterns-container,
.shadowing-container,
.progress-container {
  max-width: 480px;
  margin: 0 auto;
}

.words-toolbar,
.patterns-toolbar,
.shadowing-toolbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

input[type="range"] {
  flex: 1;
  min-width: 150px;
  height: 6px;
  background: var(--border-color);
  border-radius: 3px;
  outline: none;
  appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
}

.words-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.word-card {
  background: var(--bg-color);
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.word-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.word-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.word-phonetic {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
}

.word-audio-btn {
  background: var(--primary-light);
  border: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.word-audio-btn:hover {
  background: var(--primary-color);
  color: white;
}

.word-translation {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: 0.5rem;
}

.word-example {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-style: italic;
}

.word-example-cn {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.patterns-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.pattern-card {
  background: var(--bg-color);
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s ease;
}

.pattern-card:hover {
  box-shadow: var(--shadow-md);
}

.pattern-template {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.pattern-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.generated-sentence {
  background: linear-gradient(135deg, var(--primary-light) 0%, #F0FDFA 100%);
  padding: 2rem;
  border-radius: var(--radius-lg);
  text-align: center;
}

.generated-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.generated-audio-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.generated-audio-btn:hover {
  background: var(--primary-dark);
}

.shadowing-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.shadowing-card {
  background: var(--bg-color);
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s ease;
}

.shadowing-card:hover {
  box-shadow: var(--shadow-md);
}

.shadowing-sentence {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.shadowing-translation {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.shadowing-difficulty {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-top: 0.5rem;
}

.shadowing-difficulty.easy {
  background: #D1FAE5;
  color: #059669;
}

.shadowing-difficulty.medium {
  background: #FEF3C7;
  color: #D97706;
}

.shadowing-player {
  background: linear-gradient(135deg, #FEF3C7 0%, #FCE7F3 100%);
  padding: 2rem;
  border-radius: var(--radius-lg);
  text-align: center;
}

.player-sentence {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.player-translation {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.player-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.player-btn {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.player-btn:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.progress-overview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.progress-card {
  background: var(--bg-color);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  text-align: center;
}

.progress-icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.progress-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-color);
}

.progress-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.streak-card {
  background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
  padding: 2rem;
  border-radius: var(--radius-lg);
  text-align: center;
  margin-bottom: 1.5rem;
}

.streak-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.streak-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: #D97706;
}

.streak-label {
  font-size: 0.875rem;
  color: #B45309;
}

.learning-history {
  background: var(--bg-color);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.learning-history h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.history-date {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.history-stats {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer {
  background: var(--bg-secondary);
  padding: 1rem;
  text-align: center;
  margin-top: 2rem;
}

.footer-content p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

@media (min-width: 768px) {
  .navbar {
    padding: 0.75rem 2rem;
  }

  .navbar-links {
    display: flex;
  }

  .hero {
    padding: 4rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
  }

  .hero-content {
    flex: 1;
    margin-bottom: 0;
  }

  .hero-title {
    justify-content: flex-start;
    font-size: 3rem;
  }

  .hero-visual {
    display: flex;
    gap: 2rem;
  }

  .floating-card {
    width: 6rem;
    height: 6rem;
    background: var(--bg-color);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
  }

  .card-1 { animation-delay: 0s; }
  .card-2 { animation-delay: 0.5s; }
  .card-3 { animation-delay: 1s; }
  .card-4 { animation-delay: 1.5s; }

  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }

  .philosophy-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }

  .feature-cards {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }

  .words-container,
  .patterns-container,
  .shadowing-container,
  .progress-container {
    max-width: 800px;
  }

  .words-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .patterns-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .shadowing-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .words-container,
  .patterns-container,
  .shadowing-container,
  .progress-container {
    max-width: 1000px;
  }

  .words-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* === src/styles/navigation.css === */
/**
 * Navigation Styles
 * Sticky bottom navigation bar - mobile-first design
 */

/* Bottom Navigation Container */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-color);
  border-top: 1px solid var(--border-color);
  padding: 0.5rem 0;
  z-index: 1000;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Navigation List */
.nav-list {
  display: flex;
  justify-content: space-around;
  align-items: center;
  max-width: 600px;
  margin: 0 auto;
  padding: 0 0.5rem;
}

/* Navigation Item */
.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 60px;
  border-radius: var(--radius-md);
}

.nav-item:hover {
  background: var(--bg-secondary);
}

.nav-item.active {
  color: var(--primary-color);
}

.nav-item.active .nav-icon {
  transform: scale(1.1);
}

/* Navigation Icon */
.nav-icon {
  font-size: 1.5rem;
  transition: transform 0.2s ease;
}

/* Navigation Label */
.nav-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

.nav-item.active .nav-label {
  color: var(--primary-color);
  font-weight: 600;
}

/* Safe area for notched phones */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .bottom-nav {
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
  }
}

/* Add padding to main content to prevent overlap */
main {
  padding-bottom: 80px;
}

/* Tablet and Desktop */
@media (min-width: 768px) {
  .bottom-nav {
    padding: 0.75rem 0;
  }

  .nav-list {
    max-width: 800px;
  }

  .nav-item {
    min-width: 80px;
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }

  .nav-icon {
    font-size: 1.75rem;
  }

  .nav-label {
    font-size: 0.875rem;
  }

  main {
    padding-bottom: 100px;
  }
}

/* Hide bottom nav on very large screens, show side nav instead */
@media (min-width: 1024px) {
  .bottom-nav {
    display: none;
  }

  main {
    padding-bottom: 2rem;
  }

  /* Side navigation for desktop */
  .side-nav {
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 240px;
    background: var(--bg-color);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 1rem;
    z-index: 100;
  }

  .side-nav .nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
  }

  .side-nav .nav-brand-icon {
    font-size: 2rem;
  }

  .side-nav .nav-brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
  }

  .side-nav .nav-item {
    flex-direction: row;
    justify-content: flex-start;
    gap: 1rem;
    padding: 1rem;
    margin-bottom: 0.5rem;
    min-width: auto;
  }

  .side-nav .nav-icon {
    font-size: 1.5rem;
  }

  .side-nav .nav-label {
    font-size: 1rem;
  }

  /* Adjust main content for side nav */
  main {
    margin-left: 240px;
    padding: 2rem;
  }
}

/* === src/styles/words.css === */
/**
 * Vocabulary Training Module Styles
 * Mobile-first, large tap targets, clean spacing
 */

/* Words Page Container */
.words-page {
  padding-bottom: 6rem;
}

/* Toolbar */
.words-toolbar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

.speed-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.speed-control label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

#wordSpeedSlider {
  flex: 1;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  outline: none;
  -webkit-appearance: none;
}

#wordSpeedSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  background: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

#wordSpeedSlider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
}

#wordSpeedValue {
  font-weight: 600;
  color: var(--primary-color);
  min-width: 3rem;
  text-align: right;
}

/* Repeat Mode Button */
#repeatModeBtn {
  background: var(--bg-color);
  border: 2px solid var(--border-color);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

#repeatModeBtn:hover {
  border-color: var(--primary-color);
}

#repeatModeBtn.active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

/* Words List */
.words-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Word Card */
.word-card {
  background: var(--bg-color);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: all 0.2s ease;
}

.word-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.word-card.learned {
  border-color: var(--success-color);
  background: linear-gradient(135deg, #F0FDF4 0%, var(--bg-color) 100%);
}

/* Word Header */
.word-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.word-main {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.word-text {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.word-phonetic {
  font-size: 1rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Audio Button - Large tap target */
.word-audio-btn {
  background: var(--primary-light);
  border: none;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.word-audio-btn:hover {
  background: var(--primary-color);
  transform: scale(1.05);
}

.word-audio-btn:active {
  transform: scale(0.95);
}

/* Word Content */
.word-translation {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--secondary-color);
  margin-bottom: 0.75rem;
}

.word-example {
  font-size: 1rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 0.25rem;
  line-height: 1.5;
}

.word-example-cn {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Word Actions */
.word-actions {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.word-action-btn {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
}

.word-action-btn:hover {
  border-color: var(--success-color);
}

.word-action-btn.learned {
  background: var(--success-color);
  border-color: var(--success-color);
  color: white;
}

/* Progress Indicator */
.words-progress {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  background: var(--primary-light);
  border-radius: var(--radius-md);
}

.words-progress-text {
  font-size: 0.875rem;
  color: var(--primary-color);
  font-weight: 500;
}

/* Tablet and Desktop */
@media (min-width: 768px) {
  .words-toolbar {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .speed-control {
    flex: 1;
    max-width: 300px;
  }

  #repeatModeBtn {
    width: auto;
  }

  .words-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .word-card {
    padding: 1.5rem;
  }

  .word-text {
    font-size: 2rem;
  }
}

@media (min-width: 1024px) {
  .words-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* === src/styles/patterns.css === */
/**
 * Pattern Drill Module Styles
 * Clean, focused UI for sentence pattern practice
 */

/* Patterns Page */
.patterns-page {
  padding-bottom: 6rem;
}

/* Toolbar */
.patterns-toolbar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

.toolbar-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.toolbar-btn {
  flex: 1;
  min-width: 120px;
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.toolbar-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.toolbar-btn:active {
  transform: translateY(0);
}

.toolbar-btn.secondary {
  background: var(--bg-color);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.toolbar-btn.secondary:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.toolbar-btn.active {
  background: var(--success-color);
}

/* Speed Control */
.speed-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-color);
  border-radius: var(--radius-md);
}

.speed-control label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

#patternSpeedSlider {
  flex: 1;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  outline: none;
  -webkit-appearance: none;
}

#patternSpeedSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  background: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

#patternSpeedValue {
  font-weight: 600;
  color: var(--primary-color);
  min-width: 3rem;
  text-align: right;
}

/* Sentence Display Area */
.sentence-display-area {
  background: linear-gradient(135deg, var(--primary-light) 0%, #F0FDFA 100%);
  border-radius: var(--radius-xl);
  padding: 2rem 1.5rem;
  margin-bottom: 1.5rem;
  text-align: center;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1rem;
}

#sentenceDisplay {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  min-height: 3rem;
}

#sentenceDisplay.fade-in {
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#templateDisplay {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Pattern List */
.pattern-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.pattern-item {
  background: var(--bg-color);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pattern-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.pattern-item.active {
  border-color: var(--primary-color);
  background: var(--primary-light);
}

.pattern-template {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
  font-family: monospace;
}

.pattern-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Pattern Stats */
.pattern-stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Tablet and Desktop */
@media (min-width: 768px) {
  .patterns-toolbar {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .toolbar-row {
    flex: 1;
    justify-content: flex-start;
  }

  .speed-control {
    width: auto;
    min-width: 250px;
  }

  .toolbar-btn {
    flex: 0 1 auto;
    min-width: 140px;
  }

  #sentenceDisplay {
    font-size: 2rem;
  }

  .pattern-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

@media (min-width: 1024px) {
  .pattern-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .sentence-display-area {
    padding: 3rem 2rem;
  }

  #sentenceDisplay {
    font-size: 2.5rem;
  }
}

/* === src/styles/shadowing.css === */
/**
 * Shadowing Module Styles
 * Focused UI for shadowing practice with "Your Turn" indicator
 */

/* Shadowing Page */
.shadowing-page {
  padding-bottom: 6rem;
}

/* Toolbar */
.shadowing-toolbar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

.speed-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.speed-control label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

#shadowingSpeedSlider {
  flex: 1;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  outline: none;
  -webkit-appearance: none;
}

#shadowingSpeedSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  background: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

#shadowingSpeedValue {
  font-weight: 600;
  color: var(--primary-color);
  min-width: 3rem;
  text-align: right;
}

/* Main Player Area */
.shadowing-player {
  background: linear-gradient(135deg, #FEF3C7 0%, #FCE7F3 100%);
  border-radius: var(--radius-xl);
  padding: 2rem 1.5rem;
  margin-bottom: 1.5rem;
  text-align: center;
  min-height: 250px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1rem;
  position: relative;
}

/* Progress Indicator */
.shadowing-progress {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(255, 255, 255, 0.8);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Sentence Display */
.shadowing-sentence-display {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  min-height: 3rem;
}

.shadowing-translation-display {
  font-size: 1rem;
  color: var(--text-secondary);
  min-height: 1.5rem;
}

/* Your Turn Indicator */
.your-turn-indicator {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  background: var(--success-color);
  color: white;
  padding: 1rem 2rem;
  border-radius: var(--radius-lg);
  font-size: 1.125rem;
  font-weight: 600;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.9;
  }
}

.your-turn-indicator .icon {
  font-size: 1.5rem;
}

/* Control Buttons */
.shadowing-controls {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.control-btn {
  background: var(--bg-color);
  border: 2px solid var(--border-color);
  padding: 1rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 100px;
  justify-content: center;
}

.control-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-1px);
}

.control-btn:active {
  transform: translateY(0);
}

.control-btn.primary {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.control-btn.primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

/* Sentence List */
.shadowing-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.shadowing-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-color);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.shadowing-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.shadowing-item.active {
  border-color: var(--primary-color);
  background: var(--primary-light);
}

.shadowing-number {
  width: 32px;
  height: 32px;
  background: var(--bg-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.shadowing-item.active .shadowing-number {
  background: var(--primary-color);
  color: white;
}

.shadowing-content {
  flex: 1;
  min-width: 0;
}

.shadowing-sentence {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.shadowing-translation {
  font-size: 0.875rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.shadowing-difficulty {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  flex-shrink: 0;
}

.shadowing-difficulty.easy {
  background: #D1FAE5;
  color: #059669;
}

.shadowing-difficulty.medium {
  background: #FEF3C7;
  color: #D97706;
}

/* Tablet and Desktop */
@media (min-width: 768px) {
  .shadowing-toolbar {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .speed-control {
    width: auto;
    min-width: 250px;
  }

  .shadowing-player {
    padding: 3rem 2rem;
  }

  .shadowing-sentence-display {
    font-size: 2rem;
  }

  .shadowing-translation-display {
    font-size: 1.125rem;
  }

  .control-btn {
    padding: 1rem 2rem;
    font-size: 1rem;
  }

  .shadowing-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

@media (min-width: 1024px) {
  .shadowing-sentence-display {
    font-size: 2.5rem;
  }

  .shadowing-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* === src/styles/progress.css === */
/**
 * Progress Module Styles
 * Display learning progress, history, and achievements
 */

/* Progress Page */
.progress-page {
  padding-bottom: 6rem;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg-color);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
  transition: all 0.2s ease;
}

.stat-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.stat-card.streak {
  background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
  border-color: #F59E0B;
}

.stat-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-card.streak .stat-value {
  color: #D97706;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Progress Bars Section */
.progress-section {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.progress-section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.progress-item {
  margin-bottom: 1rem;
}

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

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.progress-name {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.progress-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-color);
}

.progress-bar-bg {
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  border-radius: 4px;
  transition: width 0.5s ease;
}

/* History Section */
.history-section {
  margin-bottom: 1.5rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.section-action {
  font-size: 0.875rem;
  color: var(--primary-color);
  cursor: pointer;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.history-day {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
}

.history-date {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  min-width: 60px;
}

.history-activities {
  flex: 1;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.activity-tag {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.activity-tag.words {
  background: #EEF2FF;
  color: var(--primary-color);
}

.activity-tag.patterns {
  background: #F0FDFA;
  color: var(--secondary-color);
}

.activity-tag.shadowing {
  background: #FEF3C7;
  color: #D97706;
}

.history-total {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 40px;
  text-align: right;
}

.empty-history {
  text-align: center;
  padding: 2rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.empty-history p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Achievements Section */
.achievements-section {
  margin-bottom: 1.5rem;
}

.achievements-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.achievement-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-color);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem;
  transition: all 0.2s ease;
}

.achievement-card.unlocked {
  border-color: var(--success-color);
  background: linear-gradient(135deg, #F0FDF4 0%, var(--bg-color) 100%);
}

.achievement-card.locked {
  opacity: 0.6;
}

.achievement-icon {
  font-size: 2rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.achievement-card.unlocked .achievement-icon {
  background: #D1FAE5;
}

.achievement-info {
  flex: 1;
}

.achievement-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.achievement-desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.achievement-status {
  font-size: 1.25rem;
}

/* Reset Button */
.reset-section {
  text-align: center;
  padding: 1rem;
}

.reset-btn {
  background: none;
  border: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.reset-btn:hover {
  border-color: var(--error-color);
  color: var(--error-color);
}

/* Tablet and Desktop */
@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .progress-section {
    padding: 1.5rem;
  }

  .history-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .achievements-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
}

@media (min-width: 1024px) {
  .history-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .achievements-list {
    grid-template-columns: repeat(3, 1fr);
  }
}