/* INYAMBO - Neumorphic Kinyarwanda Learning App Styles */

/* Design System Variables */
:root {
  /* Colors - Neumorphic palette */
  --primary-bg: #f0f0f3;
  --secondary-bg: #e8e8eb;
  --accent-orange: #ff6b35;
  --accent-blue: #4a90e2;
  --accent-green: #7ed321;
  --text-primary: #2c3e50;
  --text-secondary: #7f8c8d;
  --text-light: #bdc3c7;
  --shadow-light: #ffffff;
  --shadow-dark: #d1d1d4;
  --shadow-inset-light: #ffffff;
  --shadow-inset-dark: #c8c8cb;
  
  /* Neumorphic shadows */
  --neomorphic-shadow: 8px 8px 16px var(--shadow-dark), -8px -8px 16px var(--shadow-light);
  --neomorphic-inset: inset 6px 6px 12px var(--shadow-inset-dark), inset -6px -6px 12px var(--shadow-inset-light);
  --neomorphic-hover: 12px 12px 24px var(--shadow-dark), -12px -12px 24px var(--shadow-light);
  --neomorphic-pressed: inset 4px 4px 8px var(--shadow-inset-dark), inset -4px -4px 8px var(--shadow-inset-light);
  
  /* Typography */
  --font-primary: 'Inter', sans-serif;
  --font-display: 'Poppins', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Transitions */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

body {
  font-family: var(--font-primary);
  background: var(--primary-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Neumorphic Components */
.neomorphic-card {
  background: var(--primary-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--neomorphic-shadow);
  transition: var(--transition-smooth);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.neomorphic-btn {
  background: var(--primary-bg);
  border: none;
  border-radius: var(--radius-md);
  box-shadow: var(--neomorphic-shadow);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9rem;
}

.neomorphic-btn:hover {
  box-shadow: var(--neomorphic-hover);
  transform: translateY(-1px);
}

.neomorphic-btn:active {
  box-shadow: var(--neomorphic-pressed);
  transform: translateY(1px);
}

.neomorphic-inset {
  background: var(--secondary-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--neomorphic-inset);
  padding: var(--spacing-sm);
}

/* App Layout */
#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--primary-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(209, 209, 212, 0.3);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.logo h1 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-orange);
  margin-bottom: -4px;
}

.logo .tagline {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.donate-btn {
  background: linear-gradient(135deg, var(--accent-orange), #ff8c5a);
  color: white;
  font-weight: 600;
  padding: var(--spacing-sm) var(--spacing-md);
}

.donate-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.3);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding-bottom: 100px; /* Space for bottom nav */
}

.content-section {
  display: none;
}

.content-section.active {
  display: block;
  animation: fadeInUp 0.5s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Learn Section */
.lessons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.lesson-card {
  padding: var(--spacing-md);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.lesson-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-blue));
  opacity: 0;
  transition: var(--transition-smooth);
}

.lesson-card:hover::before {
  opacity: 1;
}

.lesson-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-blue), #6bb3ff);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  box-shadow: var(--neomorphic-shadow);
}

.lesson-icon i {
  font-size: 1.3rem;
  color: white;
}

.lesson-content h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.lesson-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-size: 0.85rem;
  line-height: 1.4;
}

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--secondary-bg);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: var(--spacing-xs);
  box-shadow: var(--neomorphic-inset);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-green), #a4ed4e);
  border-radius: 2px;
  transition: width 0.8s ease;
}

.difficulty {
  display: inline-block;
  padding: 2px 8px;
  background: var(--secondary-bg);
  border-radius: 10px;
  font-size: 0.7rem;
  color: var(--text-secondary);
  font-weight: 500;
  box-shadow: var(--neomorphic-inset);
}

/* AI Tutor Section */
.tutor-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  justify-content: center;
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--secondary-bg);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.tab-btn.active {
  background: var(--primary-bg);
  color: var(--accent-blue);
  box-shadow: var(--neomorphic-shadow);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.chat-container {
  max-width: 800px;
  margin: 0 auto;
  height: 500px;
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

.vocabulary-container {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

.vocabulary-container h3 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  font-family: var(--font-display);
}

.word-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.word-card {
  padding: var(--spacing-md);
  text-align: center;
  position: relative;
}

.word-kinyarwanda {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin-bottom: var(--spacing-xs);
}

.word-english {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.play-word-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  padding: 0;
  background: linear-gradient(135deg, var(--accent-green), #a4ed4e);
  color: white;
}

.conversation-practice {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

.conversation-practice h3 {
  text-align: center;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.scenario-selector {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.scenario-btn {
  padding: var(--spacing-sm);
  font-size: 0.85rem;
}

.scenario-btn.active {
  background: linear-gradient(135deg, var(--accent-orange), #ff8c5a);
  color: white;
}

.conversation-area {
  text-align: center;
}

.conversation-script {
  background: var(--secondary-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--neomorphic-inset);
}

.script-line {
  margin-bottom: var(--spacing-sm);
  text-align: left;
}

.speaker {
  font-weight: 600;
  color: var(--accent-blue);
}

.practice-conversation-btn {
  background: linear-gradient(135deg, var(--accent-green), #a4ed4e);
  color: white;
  font-weight: 600;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.message {
  display: flex;
  gap: var(--spacing-sm);
  max-width: 80%;
}

.ai-message {
  align-self: flex-start;
}

.user-message {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), #6bb3ff);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: var(--neomorphic-shadow);
  flex-shrink: 0;
}

.user-message .message-avatar {
  background: linear-gradient(135deg, var(--accent-orange), #ff8c5a);
}

.message-content {
  background: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.message-content p {
  margin: 0;
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.5;
}

.chat-input-container {
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(209, 209, 212, 0.3);
}

.input-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.input-group input {
  flex: 1;
  border: none;
  background: transparent;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-primary);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
}

.input-group input::placeholder {
  color: var(--text-light);
}

.voice-btn, .send-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.voice-btn {
  background: linear-gradient(135deg, var(--accent-green), #a4ed4e);
  color: white;
}

.send-btn {
  background: linear-gradient(135deg, var(--accent-blue), #6bb3ff);
  color: white;
}

/* Audiobooks Section */
.audiobook-viewer {
  max-width: 900px;
  margin: 0 auto;
}

.story-selector {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.story-tab {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--secondary-bg);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.story-tab.active {
  background: var(--primary-bg);
  color: var(--accent-orange);
  box-shadow: var(--neomorphic-shadow);
}

.story-content {
  padding: var(--spacing-xl);
  margin-bottom: 80px; /* Space for bottom player */
}

.story-text {
  line-height: 1.8;
  font-size: 1rem;
}

.story-text h3 {
  color: var(--accent-blue);
  margin-bottom: var(--spacing-lg);
  font-family: var(--font-display);
  text-align: center;
}

.story-text p {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.story-moral {
  background: var(--secondary-bg);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-lg);
  border-left: 4px solid var(--accent-green);
}

.story-moral strong {
  color: var(--accent-green);
}

/* Bottom Audio Player */
.bottom-audio-player {
  position: fixed;
  bottom: 80px; /* Above bottom nav */
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 500px;
  padding: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  z-index: 50;
  background: var(--primary-bg);
}

.audio-info {
  flex: 1;
  min-width: 0;
}

.story-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.narrator {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.audio-controls-mini {
  display: flex;
  gap: var(--spacing-xs);
}

.mini-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-pause-btn {
  background: linear-gradient(135deg, var(--accent-green), #a4ed4e);
  color: white;
  width: 44px;
  height: 44px;
}

.audio-progress-mini {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  min-width: 120px;
}

.progress-track-mini {
  flex: 1;
  height: 3px;
  background: var(--secondary-bg);
  border-radius: 2px;
  position: relative;
  cursor: pointer;
}

.progress-fill-mini {
  height: 100%;
  background: var(--accent-green);
  border-radius: 2px;
  width: 30%;
  transition: var(--transition-smooth);
}

.time-mini {
  font-size: 0.7rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.audiobooks-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  max-width: 800px;
  margin: 0 auto;
}

.audiobook-item {
  padding: var(--spacing-lg);
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.book-cover {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-orange), #ff8c5a);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  box-shadow: var(--neomorphic-shadow);
  flex-shrink: 0;
}

.book-content {
  flex: 1;
}

.book-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

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

.audio-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.control-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: linear-gradient(135deg, var(--accent-green), #a4ed4e);
  color: white;
}

.audio-progress {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.progress-track {
  flex: 1;
  height: 6px;
  background: var(--secondary-bg);
  border-radius: 3px;
  position: relative;
  box-shadow: var(--neomorphic-inset);
  cursor: pointer;
}

.progress-thumb {
  width: 16px;
  height: 16px;
  background: var(--accent-green);
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 0%;
  transform: translate(-50%, -50%);
  box-shadow: 0 2px 8px rgba(126, 211, 33, 0.4);
  transition: var(--transition-smooth);
}

.time-display {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  min-width: 80px;
}

/* Classroom Section */
.classroom-container {
  max-width: 1000px;
  margin: 0 auto;
  height: 600px;
  display: flex;
  overflow: hidden;
}

.chat-list {
  width: 300px;
  border-right: 1px solid rgba(209, 209, 212, 0.3);
  overflow-y: auto;
  background: var(--secondary-bg);
}

.chat-item {
  padding: var(--spacing-md);
  display: flex;
  gap: var(--spacing-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
  border-bottom: 1px solid rgba(209, 209, 212, 0.2);
}

.chat-item:hover {
  background: var(--primary-bg);
}

.chat-item.active {
  background: var(--primary-bg);
  box-shadow: inset 4px 0 0 var(--accent-blue);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), #6bb3ff);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.chat-preview h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.chat-preview p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-preview .time {
  font-size: 0.75rem;
  color: var(--text-light);
}

.chat-room {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.room-header {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid rgba(209, 209, 212, 0.3);
  background: var(--primary-bg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.room-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.room-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.online-count {
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--secondary-bg);
  padding: 4px 8px;
  border-radius: 12px;
  box-shadow: var(--neomorphic-inset);
}

.room-settings-btn {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 50%;
}

.room-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.room-messages .message {
  max-width: 100%;
  align-self: flex-start;
}

.voice-message {
  align-self: flex-start;
}

.voice-note {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--secondary-bg);
  border-radius: var(--radius-lg);
  min-width: 200px;
}

.voice-play-btn {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), #6bb3ff);
  color: white;
}

.voice-waveform {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.wave-bar {
  width: 3px;
  background: var(--accent-blue);
  border-radius: 2px;
  animation: wave 1.5s ease-in-out infinite;
}

.wave-bar:nth-child(1) { height: 12px; animation-delay: 0s; }
.wave-bar:nth-child(2) { height: 20px; animation-delay: 0.2s; }
.wave-bar:nth-child(3) { height: 16px; animation-delay: 0.4s; }
.wave-bar:nth-child(4) { height: 18px; animation-delay: 0.6s; }
.wave-bar:nth-child(5) { height: 14px; animation-delay: 0.8s; }

@keyframes wave {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

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

.message-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: 4px;
}

.username {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-blue);
}

.timestamp {
  font-size: 0.75rem;
  color: var(--text-light);
}

.message-text {
  background: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.8);
  color: var(--text-primary);
  font-size: 0.9rem;
  line-height: 1.5;
}

.room-input {
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(209, 209, 212, 0.3);
  position: relative;
}

.emoji-btn, .voice-note-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.emoji-btn {
  background: linear-gradient(135deg, var(--accent-orange), #ff8c5a);
  color: white;
}

.voice-note-btn {
  background: linear-gradient(135deg, var(--accent-green), #a4ed4e);
  color: white;
}

.voice-note-btn.recording {
  background: linear-gradient(135deg, #e74c3c, #c0392b);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.emoji-picker {
  position: absolute;
  bottom: 100%;
  left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--primary-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--neomorphic-shadow);
  z-index: 10;
}

.emoji-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: var(--spacing-xs);
}

.emoji-item {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 4px;
  transition: var(--transition-smooth);
  font-size: 1.2rem;
}

.emoji-item:hover {
  background: var(--secondary-bg);
  transform: scale(1.2);
}

/* Profile Section */
.profile-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  padding: var(--spacing-md);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-orange), #ff8c5a);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.3rem;
  box-shadow: var(--neomorphic-shadow);
}

.stat-content h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.stat-content p {
  color: var(--text-secondary);
  margin: 0;
  font-weight: 500;
  font-size: 0.9rem;
}

.achievements {
  padding: var(--spacing-lg);
  max-width: 600px;
  margin: 0 auto;
}

.achievements h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  text-align: center;
}

.achievement-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.achievement {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--secondary-bg);
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
  opacity: 0.5;
}

.achievement.earned {
  opacity: 1;
  background: var(--primary-bg);
  box-shadow: var(--neomorphic-shadow);
}

.achievement i {
  font-size: 1.2rem;
  color: var(--accent-orange);
}

.achievement span {
  font-weight: 500;
  color: var(--text-primary);
}

/* Settings specific styles */
.settings-groups {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  max-width: 600px;
  margin: 0 auto;
}

.setting-group {
  padding: var(--spacing-lg);
}

.setting-group h3 {
  font-family: var(--font-display);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  font-size: 1.2rem;
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid rgba(209, 209, 212, 0.2);
}

.setting-item:last-child {
  border-bottom: none;
}

.setting-label {
  font-weight: 500;
  color: var(--text-primary);
}

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

.setting-toggle {
  width: 50px;
  height: 26px;
  background: var(--secondary-bg);
  border-radius: 13px;
  position: relative;
  cursor: pointer;
  transition: var(--transition-smooth);
  box-shadow: var(--neomorphic-inset);
}

.setting-toggle.active {
  background: var(--accent-green);
  box-shadow: var(--neomorphic-shadow);
}

.toggle-thumb {
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 3px;
  left: 3px;
  transition: var(--transition-smooth);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.setting-toggle.active .toggle-thumb {
  left: 27px;
}

/* Lesson Detail View */
.lesson-view {
  max-width: 800px;
  margin: 0 auto;
}

.lesson-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.back-btn {
  font-size: 0.9rem;
  font-weight: 500;
}

.lesson-header h2 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text-primary);
}

.lesson-content-area {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.lesson-text {
  padding: var(--spacing-xl);
  background: white;
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.lesson-text h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.lesson-text p {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  line-height: 1.7;
}

.lesson-text .example {
  background: var(--secondary-bg);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
  border-left: 4px solid var(--accent-blue);
}

.lesson-text .pronunciation {
  font-style: italic;
  color: var(--accent-blue);
  font-weight: 500;
}

.lesson-actions {
  display: flex;
  justify-content: center;
}

.continue-btn {
  background: linear-gradient(135deg, var(--accent-green), #a4ed4e);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
}

.continue-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(126, 211, 33, 0.3);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
}

.modal.active {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--primary-bg);
  max-width: 500px;
  width: 90%;
  margin: var(--spacing-lg);
  transform: scale(0.8);
  transition: var(--transition-bounce);
}

.modal.active .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-lg) 0;
}

.modal-header h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: 50%;
  transition: var(--transition-smooth);
}

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

.modal-body {
  padding: var(--spacing-lg);
}

.modal-body p {
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  line-height: 1.6;
}

.donation-amounts {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  justify-content: center;
}

.amount-btn {
  min-width: 80px;
  font-weight: 600;
}

.amount-btn.selected {
  background: linear-gradient(135deg, var(--accent-blue), #6bb3ff);
  color: white;
}

.modal-actions {
  display: flex;
  justify-content: center;
}

.donate-now-btn {
  background: linear-gradient(135deg, var(--accent-orange), #ff8c5a);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  padding: var(--spacing-md) var(--spacing-xl);
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--primary-bg);
  border-top: 1px solid rgba(209, 209, 212, 0.3);
  display: flex;
  padding: var(--spacing-sm) 0;
  z-index: 100;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
}

.nav-btn {
  flex: 1;
  background: none;
  border: none;
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: var(--transition-smooth);
  color: var(--text-secondary);
  font-family: var(--font-primary);
}

.nav-btn i {
  font-size: 1.2rem;
  transition: var(--transition-smooth);
}

.nav-btn span {
  font-size: 0.7rem;
  font-weight: 500;
}

.nav-btn.active {
  color: var(--accent-blue);
}

.nav-btn.active i {
  transform: scale(1.1);
}

.nav-btn:hover {
  color: var(--accent-blue);
  transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 1rem;
    --spacing-xl: 2rem;
  }
  
  .main-content {
    padding: var(--spacing-md);
  }
  
  .lessons-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .lesson-card {
    padding: var(--spacing-md);
  }
  
  .section-header h2 {
    font-size: 1.6rem;
  }
  
  .classroom-container {
    height: 500px;
  }
  
  .chat-list {
    width: 250px;
  }
  
  .audiobook-item {
    flex-direction: column;
    text-align: center;
  }
  
  .book-content {
    width: 100%;
  }
  
  .audio-controls {
    justify-content: center;
  }
  
  .profile-stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .header-content {
    padding: 0 var(--spacing-sm);
  }
  
  .logo h1 {
    font-size: 1.5rem;
  }
  
  .classroom-container {
    flex-direction: column;
    height: auto;
  }
  
  .chat-list {
    width: 100%;
    height: 200px;
  }
  
  .chat-room {
    height: 400px;
  }
  
  .donation-amounts {
    flex-direction: column;
    align-items: center;
  }
  
  .amount-btn {
    width: 200px;
  }
}

/* Loading and Animation States */
.loading {
  opacity: 0.7;
  pointer-events: none;
}

.bounce-in {
  animation: bounceIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes bounceIn {
  0% {
    transform: scale(0.3);
    opacity: 0;
  }
  50% {
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.pulse {
  animation: pulse 2s infinite;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--secondary-bg);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--shadow-dark);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Focus States for Accessibility */
.neomorphic-btn:focus,
.nav-btn:focus,
input:focus {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .bottom-nav,
  .app-header,
  .modal {
    display: none !important;
  }
  
  .main-content {
    padding-bottom: 0;
  }
}