/**
 * Phrase Learning Pages Styles
 * One page for each phrase with all character animations inline
 */

:root {
  /* 轻松活泼的配色方案 - Light & Lively Color Scheme */
  --color-primary: #0ea5e9; /* Sky Blue - 天蓝色，清爽活泼 */
  --color-primary-dark: #0284c7; /* Darker Sky Blue */
  --color-primary-light: #38bdf8; /* Lighter Sky Blue */
  --color-secondary: #10b981; /* Emerald Green - 翡翠绿，充满活力 */
  --color-secondary-dark: #059669;
  --color-secondary-light: #34d399;
  --color-accent: #f59e0b; /* Amber - 琥珀色，温暖友好 */
  --color-accent-light: #fbbf24;
  --color-bg-light: #f8fafc;
  --color-bg-secondary: #e0f2fe; /* Light Blue Tint - 浅蓝背景 */
  --color-border: #e2e8f0;
  --color-text-dark: #0f172a;
  --color-text-muted: #64748b;
  --border-radius: 12px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  color: var(--color-text-dark);
  background: var(--color-bg-light);
  line-height: 1.6;
}

/* Header */
.site-header {
  background: white;
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-text-dark);
  font-weight: 700;
  font-size: 1.25rem;
}

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

.nav-menu {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
}

.nav-menu a {
  text-decoration: none;
  color: var(--color-text-dark);
  font-weight: 500;
  transition: color 0.2s;
}

.nav-menu a:hover {
  color: var(--color-primary);
}

/* Breadcrumb */
.breadcrumb {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
  max-width: 1200px;
  margin: 0 auto;
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* Main Container */
.phrase-page {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  padding-top: 0; /* Navigation bar will add spacing */
}

/* Phrase Header */
.phrase-header {
  text-align: center;
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--border-radius);
  color: white;
  margin-bottom: var(--spacing-xl);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.phrase-chinese {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: 8px;
}

.phrase-pinyin {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  opacity: 0.9;
  font-style: italic;
}

.phrase-english {
  font-size: 1.25rem;
  opacity: 0.95;
}

/* Usage Section */
.usage-section {
  margin-bottom: var(--spacing-xl);
}

.usage-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  border: 2px solid var(--color-border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.usage-card h2 {
  font-size: 1.75rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-md);
}

.usage-chinese {
  font-size: 1.125rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.usage-english {
  font-size: 1.063rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
}

.when-card,
.example-card,
.cultural-note-card {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-bg-light);
  border-radius: 8px;
  border-left: 4px solid var(--color-primary);
}

.cultural-note-card {
  border-left-color: var(--color-accent);
  background: #fffbeb;
}

.when-card strong,
.example-card strong,
.cultural-note-card strong {
  display: block;
  color: var(--color-primary);
  margin-bottom: 8px;
  font-size: 1.063rem;
}

.cultural-note-card strong {
  color: var(--color-accent);
}

.when-card p,
.example-card p,
.cultural-note-card p {
  color: var(--color-text-dark);
  line-height: 1.6;
}

/* Characters Section */
.characters-section {
  margin-bottom: var(--spacing-xl);
}

.characters-section h2 {
  font-size: 2rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.section-desc {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xl);
  font-size: 1.063rem;
}

/* Character Learning Card */
.character-learning-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  border: 2px solid var(--color-border);
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
  transition: all 0.3s;
}

.character-learning-card:hover {
  box-shadow: 0 8px 16px rgba(37, 99, 235, 0.15);
  border-color: var(--color-primary);
}

.char-header {
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-bg-light);
  padding-bottom: var(--spacing-md);
}

.char-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.char-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  font-size: 0.875rem;
  font-weight: 700;
}

.char-display {
  font-size: 3rem;
  font-weight: 500;
  color: var(--color-text-dark);
}

.char-pinyin-inline {
  font-size: 1.5rem;
  color: var(--color-primary);
  font-style: italic;
}

.char-meaning {
  color: var(--color-text-muted);
  font-size: 1.063rem;
  margin-left: 48px;
}

/* Character Content Layout */
.char-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

/* Animation Container */
.char-animation-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.char-animation {
  width: 200px;
  height: 200px;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  background: white;
  margin-bottom: var(--spacing-md);
}

.char-controls {
  display: flex;
  gap: var(--spacing-sm);
}

.btn-animate,
.btn-quiz {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.25s;
}

.btn-animate {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

.btn-animate:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
}

.btn-quiz {
  background: var(--color-secondary);
  color: white;
  box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
}

.btn-quiz:hover {
  background: var(--color-secondary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
}

/* Character Info */
.char-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.info-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-md);
  background: var(--color-bg-light);
  border-radius: 8px;
}

.info-label {
  font-weight: 600;
  color: var(--color-text-dark);
}

.info-value {
  color: var(--color-text-muted);
  font-family: 'Courier New', monospace;
}

/* Related Section */
.related-section {
  margin-bottom: var(--spacing-xl);
}

.related-section h2 {
  font-size: 1.75rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-md);
}

.related-card {
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  border: 2px solid var(--color-border);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.25s;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(16, 185, 129, 0.12);
  border-color: var(--color-secondary);
}

.related-chinese {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-sm);
}

.related-english {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* Tips Section */
.tips-section {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  border: 2px solid var(--color-border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.tips-section h2 {
  font-size: 1.75rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-lg);
}

.tips-list {
  list-style: none;
  padding: 0;
}

.tips-list li {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  background: var(--color-bg-light);
  border-radius: 8px;
  border-left: 4px solid var(--color-secondary);
  position: relative;
  padding-left: 48px;
}

.tips-list li::before {
  content: '✓';
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--color-secondary);
  font-weight: bold;
}

/* Phrases Index Page */
.phrases-index {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
}

.page-header {
  text-align: center;
  margin-bottom: 60px;
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--border-radius);
  color: white;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.subtitle {
  font-size: 1.25rem;
  opacity: 0.95;
  margin-bottom: var(--spacing-sm);
}

.hero-desc {
  font-size: 1.063rem;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto;
}

.scenario-group {
  margin-bottom: 60px;
}

.scenario-group h2 {
  font-size: 1.875rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 3px solid var(--color-primary);
}

.phrases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--spacing-md);
}

.phrase-card {
  background: white;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  border: 2px solid var(--color-border);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.25s;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

.phrase-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(37, 99, 235, 0.15);
  border-color: var(--color-primary);
}

.phrase-card .phrase-chinese {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-text-dark);
  margin-bottom: 8px;
}

.phrase-card .phrase-pinyin {
  font-size: 0.95rem;
  color: var(--color-primary);
  margin-bottom: 8px;
  font-style: italic;
}

.phrase-card .phrase-english {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* Footer */
footer {
  text-align: center;
  padding: var(--spacing-lg);
  background: white;
  border-top: 1px solid var(--color-border);
  margin-top: 60px;
}

footer a {
  color: var(--color-primary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* ===== NEW FEATURES STYLES ===== */

/* Character Navigation Bar */
.char-nav-bar {
  background: white;
  border-bottom: 2px solid var(--color-border);
  margin: 0 -24px var(--spacing-xl) -24px;
  padding: var(--spacing-md) var(--spacing-lg);
  transition: all 0.3s ease;
  position: relative;
  z-index: 90;
}

.char-nav-bar.sticky {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  margin: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  animation: slideDown 0.3s ease;
  z-index: 999;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

.char-nav-container {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.nav-label {
  font-weight: 600;
  color: var(--color-text-muted);
  margin-right: 8px;
  white-space: nowrap;
}

.char-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 12px;
  background: var(--color-bg-light);
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s;
  border: 2px solid transparent;
  min-width: 60px;
}

.char-nav-item:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.char-nav-item.practice-nav {
  background: var(--color-secondary);
  color: white;
}

.char-nav-item.practice-nav:hover {
  background: var(--color-secondary-dark);
}

.nav-char {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-dark);
}

.char-nav-item.practice-nav .nav-char {
  color: white;
}

.nav-pinyin {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.char-nav-item.practice-nav .nav-pinyin {
  color: rgba(255, 255, 255, 0.9);
}

/* Full Practice Section */
.full-practice-section {
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-xl);
  border: 3px solid var(--color-primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.full-practice-section h2 {
  font-size: 2rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.practice-desc {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  font-size: 1.063rem;
}

.full-practice-container {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.full-phrase-grid {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--color-bg-light);
  border-radius: var(--border-radius);
}

.full-char-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.full-char-writer {
  width: 120px;
  height: 120px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  background: white;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

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

.full-practice-controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-lg);
}

.btn-full-animate,
.btn-full-quiz,
.btn-full-reset {
  padding: 14px 28px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.25s;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  min-width: 150px;
}

.btn-full-animate {
  background: var(--color-primary);
  color: white;
}

.btn-full-animate:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
}

.btn-full-quiz {
  background: var(--color-secondary);
  color: white;
}

.btn-full-quiz:hover {
  background: var(--color-secondary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
}

.btn-full-reset {
  background: #6b7280;
  color: white;
}

.btn-full-reset:hover {
  background: #4b5563;
  transform: translateY(-2px);
}

.practice-progress {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--color-bg-light);
  border-radius: var(--border-radius);
}

.progress-bar {
  width: 100%;
  height: 24px;
  background: #e2e8f0;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  transition: width 0.5s ease;
  border-radius: 12px;
}

.progress-text {
  text-align: center;
  font-weight: 600;
  color: var(--color-text-dark);
  font-size: 1rem;
}

/* Stroke Order Visualization */
.stroke-order-viz {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--color-accent);
}

.stroke-order-viz h4 {
  font-size: 1.125rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-md);
}

.stroke-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stroke-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: white;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.875rem;
  transition: all 0.2s;
  cursor: help;
}

.stroke-step:hover {
  background: var(--color-primary);
  color: white;
  transform: scale(1.1);
}

/* Character Detail Link */
.char-detail-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.938rem;
  font-weight: 500;
  transition: all 0.2s;
}

.char-detail-link:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
  transform: translateX(4px);
}

/* More Links Section */
.more-links {
  margin-top: var(--spacing-lg);
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.link-btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--color-primary);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.25s;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

.link-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
}

/* Character Index Links */
.char-index-links {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-xl);
  background: var(--color-bg-light);
  border-radius: var(--border-radius);
  border-top: 3px solid var(--color-border);
}

.char-index-links h3 {
  font-size: 1.25rem;
  color: var(--color-text-dark);
  margin-bottom: var(--spacing-md);
}

.index-link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-sm);
}

.index-link {
  display: block;
  padding: var(--spacing-md);
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--color-text-dark);
  font-size: 0.938rem;
  transition: all 0.2s;
}

.index-link:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-secondary);
  transform: translateX(4px);
}

/* Enhanced Related Cards */
.related-card .related-pinyin {
  display: block;
  font-size: 0.875rem;
  color: var(--color-primary);
  margin-bottom: 4px;
  font-style: italic;
}

/* Responsive Design */
@media (max-width: 768px) {
  .phrase-chinese {
    font-size: 2.5rem;
    letter-spacing: 4px;
  }

  .phrase-pinyin {
    font-size: 1.25rem;
  }

  .char-content {
    grid-template-columns: 1fr;
  }

  .char-animation {
    width: 180px;
    height: 180px;
  }

  .char-display {
    font-size: 2rem;
  }

  .char-pinyin-inline {
    font-size: 1.25rem;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .nav-menu {
    display: none; /* Simple solution for mobile */
  }

  /* Mobile Navigation Bar */
  .char-nav-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
  }

  .char-nav-container::-webkit-scrollbar {
    height: 4px;
  }

  .char-nav-container::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 2px;
  }

  .nav-label {
    display: none; /* Hide label on mobile to save space */
  }

  .char-nav-item {
    min-width: 56px;
    padding: 6px 10px;
  }

  .nav-char {
    font-size: 1.25rem;
  }

  .nav-pinyin {
    font-size: 0.688rem;
  }

  /* Mobile Full Practice */
  .full-practice-section {
    padding: var(--spacing-lg);
  }

  .full-practice-section h2 {
    font-size: 1.5rem;
  }

  .full-phrase-grid {
    gap: 12px;
    padding: var(--spacing-md);
    flex-wrap: nowrap; /* Prevent wrapping on tablets */
  }

  .full-char-box {
    width: 100px; /* Fixed width to prevent expansion */
    flex-shrink: 0; /* Prevent shrinking */
  }

  .full-char-writer {
    width: 100px;
    height: 100px;
  }

  .full-practice-controls {
    gap: var(--spacing-sm);
  }

  .btn-full-animate,
  .btn-full-quiz,
  .btn-full-reset {
    min-width: 120px;
    padding: 12px 20px;
    font-size: 0.938rem;
  }

  /* Mobile Character Cards */
  .character-learning-card {
    padding: var(--spacing-lg);
  }

  .stroke-order-viz {
    padding: var(--spacing-md);
  }

  .stroke-steps {
    gap: 6px;
  }

  .stroke-step {
    width: 32px;
    height: 32px;
    font-size: 0.813rem;
  }

  /* Mobile Index Links */
  .index-link-grid {
    grid-template-columns: 1fr;
  }

  .char-index-links {
    padding: var(--spacing-lg);
  }
}

@media (max-width: 576px) {
  .phrase-page {
    padding: var(--spacing-md);
  }

  .phrase-chinese {
    font-size: 2rem;
    letter-spacing: 2px;
  }

  .phrase-pinyin {
    font-size: 1.125rem;
  }

  .char-animation {
    width: 150px;
    height: 150px;
  }

  .char-controls {
    flex-direction: column;
    width: 100%;
  }

  .btn-animate,
  .btn-quiz {
    width: 100%;
    min-height: 48px; /* Touch-friendly */
  }

  /* Very Small Screens - Full Practice */
  .full-char-writer {
    width: 80px;
    height: 80px;
  }

  .full-phrase-grid {
    gap: 8px;
    padding: var(--spacing-sm);
    flex-wrap: nowrap; /* Prevent wrapping on mobile */
  }

  .full-char-box {
    width: 80px; /* Fixed width to prevent expansion */
    flex-shrink: 0; /* Prevent shrinking */
  }

  .char-label {
    font-size: 0.75rem;
    width: 100%; /* Ensure label doesn't expand box */
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .btn-full-animate,
  .btn-full-quiz,
  .btn-full-reset {
    width: 100%;
    min-height: 48px;
  }

  .full-practice-controls {
    flex-direction: column;
    width: 100%;
  }

  /* Very Small Screens - Typography */
  .usage-card h2,
  .characters-section h2,
  .related-section h2,
  .tips-section h2 {
    font-size: 1.5rem;
  }

  .section-desc,
  .practice-desc {
    font-size: 0.938rem;
  }

  /* Compact Navigation Bar on Very Small Screens */
  .char-nav-item {
    min-width: 48px;
    padding: 4px 8px;
  }

  .nav-char {
    font-size: 1.125rem;
  }

  .nav-pinyin {
    font-size: 0.625rem;
  }

  /* More Links */
  .more-links {
    flex-direction: column;
  }

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

  /* Character Header */
  .char-header {
    padding-bottom: var(--spacing-sm);
  }

  .char-meaning {
    margin-left: 0;
    margin-top: 8px;
  }

  .char-number {
    width: 28px;
    height: 28px;
    font-size: 0.813rem;
  }

  .char-display {
    font-size: 1.75rem;
  }

  .char-pinyin-inline {
    font-size: 1.125rem;
  }
}

/* Print Styles */
@media print {
  .site-header,
  .breadcrumb,
  footer,
  .related-section,
  .char-controls {
    display: none;
  }

  .character-learning-card {
    break-inside: avoid;
    page-break-inside: avoid;
  }
}