/* Design System - Color Palette */
:root {
  /* Primary Colors - Korean-inspired */
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;

  /* Secondary Colors - Traditional Korean */
  --secondary-50: #fef7ee;
  --secondary-100: #fdedd3;
  --secondary-200: #fbd6a5;
  --secondary-300: #f8b866;
  --secondary-400: #f59e0b;
  --secondary-500: #d97706;
  --secondary-600: #b45309;
  --secondary-700: #92400e;
  --secondary-800: #78350f;
  --secondary-900: #451a03;

  /* Neutral Colors */
  --neutral-50: #fafafa;
  --neutral-100: #f5f5f5;
  --neutral-200: #e5e5e5;
  --neutral-300: #d4d4d4;
  --neutral-400: #a3a3a3;
  --neutral-500: #737373;
  --neutral-600: #525252;
  --neutral-700: #404040;
  --neutral-800: #262626;
  --neutral-900: #171717;

  /* Semantic Colors */
  --success-50: #f0fdf4;
  --success-500: #22c55e;
  --success-600: #16a34a;
  
  --warning-50: #fffbeb;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  
  --error-50: #fef2f2;
  --error-500: #ef4444;
  --error-600: #dc2626;

  /* Typography */
  --font-korean: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-english: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', monospace;

  /* Spacing Scale (8px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

/* Reset and Base Styles */
html, body {
  font-family: var(--font-english);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  height: 100%;
  color: var(--neutral-800);
  background-color: var(--neutral-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Korean text styling */
[lang="ko"], .korean {
  font-family: var(--font-korean);
  font-weight: 400;
}

/* Typography Scale */
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Layout Utilities */
#main {
  padding-left: var(--space-3);
}

.container {
  padding-bottom: var(--space-20); /* Space for fixed bottom nav */
}

/* Highlight utility */
.highlight { 
  background: linear-gradient(120deg, var(--secondary-200) 0%, var(--secondary-300) 100%);
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-2);
}

/* Modern Navigation Styles */
.modern-bottom-nav {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--neutral-200);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) var(--space-4);
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
}

.modern-bottom-nav .tabs {
  margin-bottom: 0;
  border-bottom: none;
}

.modern-bottom-nav .tabs ul {
  border-bottom: none;
  display: flex;
  justify-content: space-around;
  align-items: center;
  margin: 0;
  padding: 0;
}

.modern-bottom-nav .tabs li {
  flex: 1;
  text-align: center;
  margin: 0;
}

.modern-bottom-nav .tabs li a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  color: var(--neutral-500);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 500;
  transition: all var(--transition-normal);
  border: none;
  background: none;
  min-height: 3.5rem;
  justify-content: center;
}

.modern-bottom-nav .tabs li a:hover {
  background-color: var(--primary-50);
  color: var(--primary-600);
  transform: translateY(-1px);
}

.modern-bottom-nav .tabs li.is-active a {
  background-color: var(--primary-100);
  color: var(--primary-700);
  font-weight: 600;
}

.modern-bottom-nav .nav-icon {
  width: 24px;
  height: 24px;
  stroke-width: 2;
  transition: all var(--transition-normal);
}

.modern-bottom-nav .tabs li.is-active .nav-icon {
  stroke-width: 2.5;
  transform: scale(1.1);
}

/* Card Enhancements */
.modern-card {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-200);
  overflow: hidden;
  transition: all var(--transition-normal);
}

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

.modern-card-header {
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
  padding: var(--space-6);
  border-bottom: 1px solid var(--primary-200);
}

.modern-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-800);
  margin-bottom: var(--space-2);
}

.modern-card-subtitle {
  font-size: 0.875rem;
  color: var(--primary-600);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.modern-card-content {
  padding: var(--space-6);
}

.modern-card-footer {
  background: var(--neutral-50);
  padding: var(--space-4);
  border-top: 1px solid var(--neutral-200);
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Modern Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
  color: white;
}

.btn-secondary {
  background: white;
  color: var(--neutral-700);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.btn-secondary:hover {
  background: var(--neutral-50);
  border-color: var(--neutral-400);
  transform: translateY(-1px);
  color: var(--neutral-700);
}

.btn-ghost {
  background: transparent;
  color: var(--neutral-600);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.btn-ghost:hover {
  background: var(--neutral-100);
  color: var(--neutral-700);
}

/* Search Input Enhancement */
.modern-search {
  position: relative;
  margin-bottom: var(--space-6);
}

.modern-search-input {
  width: 100%;
  padding: var(--space-4) var(--space-12) var(--space-4) var(--space-4);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-xl);
  font-size: 1rem;
  background: white;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.modern-search-input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.modern-search-icon {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--neutral-400);
  pointer-events: none;
}

/* Audio Button Enhancement */
.audio-btn {
  background: linear-gradient(135deg, var(--secondary-400) 0%, var(--secondary-500) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.audio-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, var(--secondary-500) 0%, var(--secondary-600) 100%);
}

/* Progress indicators */
.progress-ring {
  width: 24px;
  height: 24px;
  border: 2px solid var(--neutral-200);
  border-top: 2px solid var(--primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Learning stats */
.learning-stats {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.stat-card {
  flex: 1;
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
  border: 1px solid var(--neutral-200);
  box-shadow: var(--shadow-sm);
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-600);
  display: block;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--neutral-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

/* Micro-interactions and Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
  40%, 43% { transform: translate3d(0, -8px, 0); }
  70% { transform: translate3d(0, -4px, 0); }
  90% { transform: translate3d(0, -2px, 0); }
}

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

@keyframes shimmer {
  0% { background-position: -200px 0; }
  100% { background-position: calc(200px + 100%) 0; }
}

/* Apply animations */
.animate-fade-in {
  animation: fadeIn 0.5s ease-out;
}

.animate-slide-in {
  animation: slideIn 0.3s ease-out;
}

.animate-bounce {
  animation: bounce 1s;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Hover effects */
.hover-lift {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Loading states */
.loading-shimmer {
  background: linear-gradient(90deg, var(--neutral-200) 25%, var(--neutral-100) 50%, var(--neutral-200) 75%);
  background-size: 200px 100%;
  animation: shimmer 1.5s infinite;
}

/* Focus states */
.focus-ring:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.3);
}

/* Card entrance animation */
#card {
  animation: fadeIn 0.4s ease-out;
}

/* Button press feedback */
.btn-primary:active,
.btn-secondary:active,
.btn-ghost:active {
  transform: translateY(1px) scale(0.98);
}

/* Tab selection animation */
.modern-bottom-nav .tabs li a {
  position: relative;
  overflow: hidden;
}

.modern-bottom-nav .tabs li a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.modern-bottom-nav .tabs li a:hover::before {
  left: 100%;
}

/* Audio button feedback */
.audio-btn:active {
  animation: pulse 0.3s;
}

/* Success feedback */
.success-feedback {
  background: linear-gradient(135deg, var(--success-50) 0%, var(--success-100) 100%);
  border: 1px solid var(--success-200);
  color: var(--success-700);
  animation: bounce 0.6s ease-out;
}

/* Error feedback */
.error-feedback {
  background: linear-gradient(135deg, var(--error-50) 0%, var(--error-100) 100%);
  border: 1px solid var(--error-200);
  color: var(--error-700);
  animation: fadeIn 0.3s ease-out;
}

/* Content loading */
.content-loading {
  opacity: 0.7;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

/* Smooth page transitions */
#container {
  transition: opacity 0.2s ease-in-out;
}

.htmx-request #container {
  opacity: 0.8;
}

.htmx-request.htmx-indicator {
  opacity: 1;
}

/* Stagger animations for lists */
.list-item {
  animation: slideIn 0.4s ease-out;
}

.list-item:nth-child(1) { animation-delay: 0.05s; }
.list-item:nth-child(2) { animation-delay: 0.1s; }
.list-item:nth-child(3) { animation-delay: 0.15s; }
.list-item:nth-child(4) { animation-delay: 0.2s; }
.list-item:nth-child(5) { animation-delay: 0.25s; }

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    /* Dark mode color overrides */
    --neutral-50: #171717;
    --neutral-100: #262626;
    --neutral-200: #404040;
    --neutral-300: #525252;
    --neutral-400: #737373;
    --neutral-500: #a3a3a3;
    --neutral-600: #d4d4d4;
    --neutral-700: #e5e5e5;
    --neutral-800: #f5f5f5;
    --neutral-900: #fafafa;

    /* Adjust primary colors for dark mode */
    --primary-50: #0c1929;
    --primary-100: #162439;
    --primary-800: #7dd3fc;
    --primary-900: #bae6fd;

    /* Adjust secondary colors for dark mode */
    --secondary-50: #2c1810;
    --secondary-100: #3d2417;
    --secondary-800: #fbd6a5;
    --secondary-900: #fdedd3;

    /* Dark shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
  }

  /* Dark mode specific overrides */
  .modern-bottom-nav {
    background: rgba(23, 23, 23, 0.95);
    border-top: 1px solid var(--neutral-300);
  }

  .modern-card {
    background: var(--neutral-100);
    border: 1px solid var(--neutral-300);
  }

  .modern-card-header {
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    border-bottom: 1px solid var(--primary-300);
  }

  .modern-card-footer {
    background: var(--neutral-50);
    border-top: 1px solid var(--neutral-300);
  }

  .modern-search-input {
    background: var(--neutral-100);
    border: 1px solid var(--neutral-400);
    color: var(--neutral-800);
  }

  .modern-search-input:focus {
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
  }

  .btn-secondary {
    background: var(--neutral-100);
    color: var(--neutral-800);
    border: 1px solid var(--neutral-400);
  }

  .btn-secondary:hover {
    background: var(--neutral-200);
    border-color: var(--neutral-500);
    color: var(--neutral-800);
  }

  .stat-card {
    background: var(--neutral-100);
    border: 1px solid var(--neutral-300);
  }

  .highlight {
    background: linear-gradient(120deg, var(--secondary-300) 0%, var(--secondary-400) 100%);
    color: var(--neutral-900);
  }
}

/* Manual dark mode toggle */
[data-theme="dark"] {
  /* Same dark mode variables as above */
  --neutral-50: #171717;
  --neutral-100: #262626;
  --neutral-200: #404040;
  --neutral-300: #525252;
  --neutral-400: #737373;
  --neutral-500: #a3a3a3;
  --neutral-600: #d4d4d4;
  --neutral-700: #e5e5e5;
  --neutral-800: #f5f5f5;
  --neutral-900: #fafafa;

  --primary-50: #0c1929;
  --primary-100: #162439;
  --primary-800: #7dd3fc;
  --primary-900: #bae6fd;

  --secondary-50: #2c1810;
  --secondary-100: #3d2417;
  --secondary-800: #fbd6a5;
  --secondary-900: #fdedd3;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
}

[data-theme="dark"] .modern-bottom-nav {
  background: rgba(23, 23, 23, 0.95);
  border-top: 1px solid var(--neutral-300);
}

[data-theme="dark"] .modern-card {
  background: var(--neutral-100);
  border: 1px solid var(--neutral-300);
}

[data-theme="dark"] .modern-card-header {
  background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
  border-bottom: 1px solid var(--primary-300);
}

[data-theme="dark"] .modern-card-footer {
  background: var(--neutral-50);
  border-top: 1px solid var(--neutral-300);
}

[data-theme="dark"] .modern-search-input {
  background: var(--neutral-100);
  border: 1px solid var(--neutral-400);
  color: var(--neutral-800);
}

[data-theme="dark"] .modern-search-input:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.2);
}

[data-theme="dark"] .btn-secondary {
  background: var(--neutral-100);
  color: var(--neutral-800);
  border: 1px solid var(--neutral-400);
}

[data-theme="dark"] .btn-secondary:hover {
  background: var(--neutral-200);
  border-color: var(--neutral-500);
  color: var(--neutral-800);
}

[data-theme="dark"] .stat-card {
  background: var(--neutral-100);
  border: 1px solid var(--neutral-300);
}

[data-theme="dark"] .highlight {
  background: linear-gradient(120deg, var(--secondary-300) 0%, var(--secondary-400) 100%);
  color: var(--neutral-900);
}

/* Theme toggle button */
.theme-toggle {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  background: var(--neutral-100);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  cursor: pointer;
  transition: all var(--transition-normal);
  z-index: 60;
  box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
  background: var(--neutral-200);
  transform: scale(1.05);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  color: var(--neutral-600);
}

[data-theme="dark"] .theme-toggle svg {
  color: var(--neutral-400);
}

/* Mnemonic Panel Styles */
.mnemonic-panel {
  background: linear-gradient(135deg, var(--warning-50) 0%, var(--warning-100) 100%);
  border: 1px solid var(--warning-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.mnemonic-panel:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.mnemonic-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: linear-gradient(135deg, var(--warning-100) 0%, var(--warning-200) 100%);
  border-bottom: 1px solid var(--warning-300);
}

.mnemonic-icon {
  color: var(--warning-600);
  display: flex;
  align-items: center;
}

.mnemonic-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--warning-800);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.mnemonic-content {
  padding: var(--space-4);
}

.mnemonic-link {
  display: inline-block;
  background: white;
  color: var(--warning-700);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  border: 1px solid var(--warning-300);
  margin-right: var(--space-2);
  margin-bottom: var(--space-2);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.mnemonic-link:hover {
  background: var(--warning-50);
  border-color: var(--warning-400);
  color: var(--warning-800);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.mnemonic-link:active {
  transform: translateY(0) scale(0.98);
}

/* Example Panel Styles */
.example-panel {
  background: linear-gradient(135deg, var(--success-50) 0%, var(--success-100) 100%);
  border: 1px solid var(--success-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.example-panel:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.example-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: linear-gradient(135deg, var(--success-100) 0%, var(--success-200) 100%);
  border-bottom: 1px solid var(--success-300);
}

.example-icon {
  color: var(--success-600);
  display: flex;
  align-items: center;
}

.example-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--success-800);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.example-content {
  padding: var(--space-4);
}

.example-sentence {
  margin-bottom: var(--space-4);
}

.example-link {
  color: var(--success-800);
  text-decoration: none;
  padding: var(--space-2) 0;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  display: block;
  line-height: 1.6;
}

.example-link:hover {
  color: var(--success-900);
  background: rgba(34, 197, 94, 0.05);
  padding-left: var(--space-2);
  padding-right: var(--space-2);
}

.example-actions {
  display: flex;
  justify-content: flex-start;
}

.example-actions .audio-btn {
  background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
  font-size: 0.75rem;
  padding: var(--space-2) var(--space-3);
}

.example-actions .audio-btn:hover {
  background: linear-gradient(135deg, var(--success-600) 0%, var(--success-700) 100%);
}

/* Dark mode adjustments for panels */
@media (prefers-color-scheme: dark) {
  .mnemonic-panel {
    background: linear-gradient(135deg, var(--warning-800) 0%, var(--warning-900) 100%);
    border: 1px solid var(--warning-700);
  }

  .mnemonic-header {
    background: linear-gradient(135deg, var(--warning-900) 0%, var(--warning-800) 100%);
    border-bottom: 1px solid var(--warning-600);
  }

  .mnemonic-icon {
    color: var(--warning-400);
  }

  .mnemonic-title {
    color: var(--warning-200);
  }

  .mnemonic-link {
    background: var(--neutral-100);
    color: var(--warning-300);
    border: 1px solid var(--warning-600);
  }

  .mnemonic-link:hover {
    background: var(--warning-900);
    border-color: var(--warning-500);
    color: var(--warning-200);
  }

  .example-panel {
    background: linear-gradient(135deg, var(--success-800) 0%, var(--success-900) 100%);
    border: 1px solid var(--success-700);
  }

  .example-header {
    background: linear-gradient(135deg, var(--success-900) 0%, var(--success-800) 100%);
    border-bottom: 1px solid var(--success-600);
  }

  .example-icon {
    color: var(--success-400);
  }

  .example-title {
    color: var(--success-200);
  }

  .example-link {
    color: var(--success-200);
  }

  .example-link:hover {
    color: var(--success-100);
    background: rgba(34, 197, 94, 0.1);
  }

  .example-actions .audio-btn {
    background: linear-gradient(135deg, var(--success-600) 0%, var(--success-700) 100%);
  }

  .example-actions .audio-btn:hover {
    background: linear-gradient(135deg, var(--success-700) 0%, var(--success-800) 100%);
  }
}

/* Manual dark mode for panels */
[data-theme="dark"] .mnemonic-panel {
  background: linear-gradient(135deg, var(--warning-800) 0%, var(--warning-900) 100%);
  border: 1px solid var(--warning-700);
}

[data-theme="dark"] .mnemonic-header {
  background: linear-gradient(135deg, var(--warning-900) 0%, var(--warning-800) 100%);
  border-bottom: 1px solid var(--warning-600);
}

[data-theme="dark"] .mnemonic-icon {
  color: var(--warning-400);
}

[data-theme="dark"] .mnemonic-title {
  color: var(--warning-200);
}

[data-theme="dark"] .mnemonic-link {
  background: var(--neutral-100);
  color: var(--warning-300);
  border: 1px solid var(--warning-600);
}

[data-theme="dark"] .mnemonic-link:hover {
  background: var(--warning-900);
  border-color: var(--warning-500);
  color: var(--warning-200);
}

[data-theme="dark"] .example-panel {
  background: linear-gradient(135deg, var(--success-800) 0%, var(--success-900) 100%);
  border: 1px solid var(--success-700);
}

[data-theme="dark"] .example-header {
  background: linear-gradient(135deg, var(--success-900) 0%, var(--success-800) 100%);
  border-bottom: 1px solid var(--success-600);
}

[data-theme="dark"] .example-icon {
  color: var(--success-400);
}

[data-theme="dark"] .example-title {
  color: var(--success-200);
}

[data-theme="dark"] .example-link {
  color: var(--success-200);
}

[data-theme="dark"] .example-link:hover {
  color: var(--success-100);
  background: rgba(34, 197, 94, 0.1);
}

[data-theme="dark"] .example-actions .audio-btn {
  background: linear-gradient(135deg, var(--success-600) 0%, var(--success-700) 100%);
}

[data-theme="dark"] .example-actions .audio-btn:hover {
  background: linear-gradient(135deg, var(--success-700) 0%, var(--success-800) 100%);
}

/* Enhanced card integration */
#card-mnemonic:not(:empty) {
  animation: slideIn 0.4s ease-out;
}

#card-random-example:not(:empty) {
  animation: slideIn 0.4s ease-out 0.1s both;
}

/* Stagger the panels when both appear */
.mnemonic-panel + .example-panel {
  animation-delay: 0.15s;
}

/* Adjust panel spacing within card content */
.modern-card-footer + #card-mnemonic .mnemonic-panel {
  margin-top: 0;
}

.modern-card-footer + #card-random-example .example-panel {
  margin-top: 0;
}

#card-mnemonic:not(:empty) + #card-random-example .example-panel {
  margin-top: var(--space-4);
}

/* Proper integration of panels within card */
#card-answer #card-mnemonic .mnemonic-panel,
#card-answer #card-random-example .example-panel {
  margin-top: var(--space-4);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

#card-answer #card-mnemonic .mnemonic-panel:hover,
#card-answer #card-random-example .example-panel:hover {
  box-shadow: var(--shadow-md);
}

/* Ensure proper spacing in the card layout */
#card-answer.modern-card-content {
  padding: var(--space-6);
}

#card-answer .modern-card-footer {
  margin: var(--space-4) -var(--space-6) -var(--space-6);
  border-radius: 0;
}

/* Modern Overview & Detail Page Styles */
.page-header {
  margin-bottom: var(--space-8);
}

.page-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--neutral-800);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.page-title-icon {
  color: var(--primary-600);
}

.section-header {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--neutral-700);
  margin: var(--space-8) 0 var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--primary-200);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.section-header-icon {
  color: var(--primary-500);
}

/* Modern List Item Styles */
.modern-list-item {
  background: white;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.modern-list-item:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-300);
}

.modern-list-item.list-item {
  animation: slideIn 0.4s ease-out;
}

.list-item-content {
  flex: 1;
  min-width: 0; /* Allow text truncation */
}

.list-item-primary {
  font-size: 1rem;
  font-weight: 500;
  color: var(--neutral-800);
  text-decoration: none;
  margin-bottom: var(--space-1);
  display: block;
  transition: color var(--transition-normal);
}

.list-item-primary:hover {
  color: var(--primary-600);
}

.list-item-primary.korean {
  font-size: 1.125rem;
  font-weight: 600;
}

.list-item-secondary {
  font-size: 0.875rem;
  color: var(--neutral-500);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.list-item-actions {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.list-item-badge {
  background: var(--primary-100);
  color: var(--primary-700);
  font-size: 0.75rem;
  font-weight: 500;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.list-item-badge.warning {
  background: var(--warning-100);
  color: var(--warning-700);
}

.list-item-badge.success {
  background: var(--success-100);
  color: var(--success-700);
}

.list-item-badge.error {
  background: var(--error-100);
  color: var(--error-700);
}

/* Selectable Text and Type Indicators */
.selectable-text {
  user-select: text;
  cursor: text;
}

/* Visual type indicators via border accents */
.note-item {
  border-left: 4px solid var(--primary-400);
}

.ignored-item {
  border-left: 4px solid var(--warning-400);
  background: linear-gradient(90deg, var(--warning-50) 0%, white 8%);
}

.search-result-item {
  border-left: 4px solid var(--secondary-400);
  background: linear-gradient(90deg, var(--secondary-50) 0%, white 8%);
}

/* Hover states for type indicators */
.note-item:hover {
  border-left-color: var(--primary-500);
}

.ignored-item:hover {
  border-left-color: var(--warning-500);
}

.search-result-item:hover {
  border-left-color: var(--secondary-500);
}

/* Danger button styling */
.btn-danger {
  background: linear-gradient(135deg, var(--error-500) 0%, var(--error-600) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-4);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.btn-danger:hover {
  background: linear-gradient(135deg, var(--error-600) 0%, var(--error-700) 100%);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-danger:active {
  transform: translateY(0) scale(0.98);
}

/* Success button styling */
.btn-success {
  background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-4);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.btn-success:hover {
  background: linear-gradient(135deg, var(--success-600) 0%, var(--success-700) 100%);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-success:active {
  transform: translateY(0) scale(0.98);
}

/* Detail Page Card Styles */
.detail-card {
  background: white;
  border: 1px solid var(--neutral-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.detail-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--neutral-100);
}

.detail-row:last-child {
  border-bottom: none;
}

.detail-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--neutral-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-width: 120px;
  flex-shrink: 0;
}

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

.detail-content .korean {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--neutral-800);
}

.detail-actions {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  flex-shrink: 0;
}

/* Modern tag styling */
.modern-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--neutral-100);
  color: var(--neutral-700);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--neutral-300);
  margin-right: var(--space-2);
  margin-bottom: var(--space-2);
}

.modern-tag.is-primary {
  background: var(--primary-100);
  color: var(--primary-700);
  border-color: var(--primary-300);
}

.modern-tag.is-success {
  background: var(--success-100);
  color: var(--success-700);
  border-color: var(--success-300);
}

.modern-tag.is-warning {
  background: var(--warning-100);
  color: var(--warning-700);
  border-color: var(--warning-300);
}

.modern-tag.is-danger {
  background: var(--error-100);
  color: var(--error-700);
  border-color: var(--error-300);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-6) var(--space-10);
  color: var(--neutral-500);
  max-width: 400px;
  margin: 0 auto;
}

.empty-state-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-3);
  color: var(--neutral-400);
}

.empty-state-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--neutral-600);
  margin-bottom: var(--space-2);
}

.empty-state-description {
  font-size: 0.875rem;
  color: var(--neutral-500);
  line-height: 1.5;
}

/* Compact empty state for search results */
.empty-state.compact {
  padding: var(--space-3) var(--space-4);
  max-width: 280px;
  margin: var(--space-4) auto;
}

.empty-state.compact .empty-state-icon {
  width: 24px;
  height: 24px;
  margin-bottom: var(--space-1);
}

.empty-state.compact .empty-state-title {
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.empty-state.compact .empty-state-description {
  font-size: 0.75rem;
  line-height: 1.4;
}

/* Add note link styling */
.add-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--primary-600);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  border: 1px dashed var(--primary-300);
  background: var(--primary-50);
}

.add-link:hover {
  background: var(--primary-100);
  border-color: var(--primary-400);
  color: var(--primary-700);
  transform: translateY(-1px);
}