/* Modern Conversation Chat Interface Styles */

/* Emoji rendering improvements */
.category-icon,
.contact-avatar {
  font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
  font-variant-emoji: emoji;
}

:root {
  --chat-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --chat-bg-alt: #f8fafc;
  --chat-header-bg: rgba(255, 255, 255, 0.95);
  --message-bg-incoming: #ffffff;
  --message-bg-outgoing: #007bff;
  --message-text: #2d3748;
  --message-text-outgoing: #ffffff;
  --message-time: #718096;
  --typing-bg: #e2e8f0;
  --online-status: #48bb78;
  --border-radius-message: 20px;
  --shadow-message: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-message-hover: 0 8px 25px rgba(0,0,0,0.2);
  --chat-border: rgba(255, 255, 255, 0.2);
  --glass-backdrop: rgba(255, 255, 255, 0.1);
  
  /* Offline dialogue styles */
  --dialogue-bg: #ffffff;
  --dialogue-speaker-customer: #2563eb;
  --dialogue-speaker-waiter: #059669;
  --dialogue-text: #374151;
  --dialogue-border: #e5e7eb;
  --dialogue-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* Dark theme colors - Modern dark mode */
body.dark-theme {
  --chat-bg: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
  --chat-bg-alt: #1a202c;
  --chat-header-bg: rgba(26, 32, 44, 0.95);
  --message-bg-incoming: #2d3748;
  --message-bg-outgoing: #3182ce;
  --message-text: #e2e8f0;
  --message-text-outgoing: #ffffff;
  --message-time: #a0aec0;
  --typing-bg: #4a5568;
  --shadow-message: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-message-hover: 0 8px 25px rgba(0,0,0,0.4);
  --chat-border: rgba(255, 255, 255, 0.1);
  --glass-backdrop: rgba(0, 0, 0, 0.2);
  
  /* Dark theme offline dialogue */
  --dialogue-bg: #1f2937;
  --dialogue-speaker-customer: #60a5fa;
  --dialogue-speaker-waiter: #34d399;
  --dialogue-text: #e5e7eb;
  --dialogue-border: #374151;
  --dialogue-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.conversation-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  background: var(--chat-bg-alt);
  min-height: calc(100vh - 200px);
}

.conversation-header {
  text-align: center;
  margin-bottom: 30px;
  padding: 30px;
  background: var(--glass-backdrop);
  backdrop-filter: blur(20px);
  border: 1px solid var(--chat-border);
  border-radius: 24px;
  box-shadow: var(--shadow-message);
}

.conversation-header h1 {
  color: var(--primary-color);
  margin-bottom: 15px;
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

.conversation-header .category-icon {
  font-size: 3rem;
  background: none;
  -webkit-text-fill-color: initial;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
  margin-right: 0;
}

.conversation-header p {
  color: var(--text-color);
  font-size: 1.1rem;
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Chat Container */
.chat-container {
  background: var(--glass-backdrop);
  backdrop-filter: blur(20px);
  border: 1px solid var(--chat-border);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-message);
  margin-bottom: 30px;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.chat-container:hover {
  box-shadow: var(--shadow-message-hover);
  transform: translateY(-2px);
}

/* Chat Header */
.chat-header {
  background: var(--chat-header-bg);
  backdrop-filter: blur(20px);
  padding: 20px 25px;
  border-bottom: 1px solid var(--chat-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chat-info {
  display: flex;
  align-items: center;
  gap: 15px;
}

.contact-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.contact-details h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-color);
}

.status {
  font-size: 0.85rem;
  opacity: 0.9;
  color: var(--online-status);
}

.chat-actions {
  display: flex;
  gap: 10px;
}

.action-btn {
  background: var(--glass-backdrop);
  border: 1px solid var(--chat-border);
  border-radius: 12px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 1.1rem;
  color: var(--text-color);
  backdrop-filter: blur(10px);
}

.action-btn:hover {
  background: var(--chat-border);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Chat Messages */
.chat-messages {
  background: var(--chat-bg);
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
  min-height: 500px;
  max-height: 600px;
  overflow-y: auto;
  padding: 25px;
  position: relative;
  scroll-behavior: smooth;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Custom scrollbar for chat messages */
.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--chat-border);
  border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--message-time);
}

/* Message Styles */
.message {
  display: flex;
  margin-bottom: 18px;
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  animation: messageSlideIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  transition: all 0.3s ease;
}

@keyframes messageSlideIn {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.message.incoming {
  justify-content: flex-start;
}

.message.outgoing {
  justify-content: flex-end;
}

.message-content {
  max-width: 80%;
  background: var(--message-bg-incoming);
  padding: 14px 18px 10px 18px;
  border-radius: var(--border-radius-message);
  box-shadow: var(--shadow-message);
  position: relative;
  word-wrap: break-word;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.message.outgoing .message-content {
  background: var(--message-bg-outgoing);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.message-text {
  color: var(--message-text);
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 8px;
  font-weight: 400;
}

.message.outgoing .message-text {
  color: var(--message-text-outgoing);
}

.message-time {
  font-size: 0.75rem;
  color: var(--message-time);
  text-align: right;
  margin-top: 4px;
  opacity: 0.8;
  font-weight: 500;
}

.message.outgoing .message-time {
  color: rgba(255, 255, 255, 0.8);
}

/* Message Tails - Modern subtle approach */
.message-content::before {
  content: '';
  position: absolute;
  width: 0;
  height: 0;
  top: 18px;
}

.message.incoming .message-content::before {
  left: -6px;
  border: 6px solid transparent;
  border-right-color: var(--message-bg-incoming);
  filter: drop-shadow(-2px 0 2px rgba(0,0,0,0.1));
}

.message.outgoing .message-content::before {
  right: -6px;
  border: 6px solid transparent;
  border-left-color: var(--message-bg-outgoing);
  filter: drop-shadow(2px 0 2px rgba(0,0,0,0.1));
}

/* Modern Typing Indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--typing-bg);
  backdrop-filter: blur(10px);
  padding: 16px 20px;
  border-radius: var(--border-radius-message);
  margin-bottom: 18px;
  max-width: 140px;
  animation: messageSlideIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-message);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.typing-dots {
  display: flex;
  gap: 5px;
}

.typing-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  animation: modernTypingBounce 1.6s ease-in-out infinite;
}

.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.3s; }
.typing-dot:nth-child(3) { animation-delay: 0.6s; }

@keyframes modernTypingBounce {
  0%, 60%, 100% {
    transform: translateY(0) scale(1);
    opacity: 0.7;
  }
  30% {
    transform: translateY(-12px) scale(1.1);
    opacity: 1;
  }
}


.conversation-container[data-conversation-type="face_to_face"] .message,
.conversation-container[data-conversation-type="phone_call"] .message {
  justify-content: flex-start;
  margin-bottom: 16px;
}

.conversation-container[data-conversation-type="face_to_face"] .message-content,
.conversation-container[data-conversation-type="phone_call"] .message-content {
  max-width: 100%;
  background: var(--dialogue-bg);
  border: 1px solid var(--dialogue-border);
  border-radius: 8px;
  box-shadow: var(--dialogue-shadow);
  padding: 16px 20px;
  position: relative;
  backdrop-filter: none;
  transition: all 0.2s ease;
}

.conversation-container[data-conversation-type="face_to_face"] .message-content:hover,
.conversation-container[data-conversation-type="phone_call"] .message-content:hover {
  transform: none;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* Remove chat tails for offline dialogue */
.conversation-container[data-conversation-type="face_to_face"] .message-content::before,
.conversation-container[data-conversation-type="phone_call"] .message-content::before {
  display: none;
}

/* Speaker name styling */
.conversation-container[data-conversation-type="face_to_face"] .message-content::after,
.conversation-container[data-conversation-type="phone_call"] .message-content::after {
  content: attr(data-speaker);
  position: absolute;
  top: -8px;
  left: 20px;
  background: var(--dialogue-bg);
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  border: 1px solid var(--dialogue-border);
}

/* Customer/Patient styling */
.conversation-container[data-conversation-type="face_to_face"] .message.outgoing .message-content::after,
.conversation-container[data-conversation-type="phone_call"] .message.outgoing .message-content::after {
  color: var(--dialogue-speaker-customer);
  border-color: var(--dialogue-speaker-customer);
}

/* Waiter/Receptionist styling */
.conversation-container[data-conversation-type="face_to_face"] .message.incoming .message-content::after,
.conversation-container[data-conversation-type="phone_call"] .message.incoming .message-content::after {
  color: var(--dialogue-speaker-waiter);
  border-color: var(--dialogue-speaker-waiter);
}

/* Text styling for offline dialogue */
.conversation-container[data-conversation-type="face_to_face"] .message-text,
.conversation-container[data-conversation-type="phone_call"] .message-text {
  color: var(--dialogue-text);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 8px;
  font-weight: 400;
}

/* Time styling for offline dialogue */
.conversation-container[data-conversation-type="face_to_face"] .message-time,
.conversation-container[data-conversation-type="phone_call"] .message-time {
  font-size: 0.8rem;
  color: var(--message-time);
  text-align: right;
  margin-top: 8px;
  opacity: 0.7;
  font-weight: 500;
}

/* Remove different styling for outgoing messages in offline mode */
.conversation-container[data-conversation-type="face_to_face"] .message.outgoing .message-text,
.conversation-container[data-conversation-type="phone_call"] .message.outgoing .message-text {
  color: var(--dialogue-text);
}

.conversation-container[data-conversation-type="face_to_face"] .message.outgoing .message-time,
.conversation-container[data-conversation-type="phone_call"] .message.outgoing .message-time {
  color: var(--message-time);
}

/* Adjust typing indicator for offline dialogue */
.conversation-container[data-conversation-type="face_to_face"] .typing-indicator,
.conversation-container[data-conversation-type="phone_call"] .typing-indicator {
  background: var(--dialogue-bg);
  border: 1px solid var(--dialogue-border);
  border-radius: 8px;
  backdrop-filter: none;
  box-shadow: var(--dialogue-shadow);
}

/* Hide chat header status for offline conversations */
.conversation-container[data-conversation-type="face_to_face"] .chat-header .status,
.conversation-container[data-conversation-type="phone_call"] .chat-header .status {
  display: none;
}

/* Modern Chat Controls */
.chat-controls {
  background: var(--glass-backdrop);
  backdrop-filter: blur(20px);
  padding: 20px 25px;
  border-top: 1px solid var(--chat-border);
  border-radius: 0 0 24px 24px;
}

.progress-container {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 15px;
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--chat-border);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  border-radius: 10px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Control Buttons */
.control-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 20px;
}

.control-btn {
  background: var(--glass-backdrop);
  backdrop-filter: blur(10px);
  border: 1px solid var(--chat-border);
  border-radius: 16px;
  padding: 12px 20px;
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 0.95rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 100px;
  justify-content: center;
}

.control-btn:hover {
  background: var(--chat-border);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.control-btn.primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
}

.control-btn.primary:hover {
  background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
  transform: translateY(-2px) scale(1.02);
}

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

.control-btn.playing {
  background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
  color: white;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

/* Speed indicator badge */
.speed-indicator {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  padding: 2px 8px;
  font-size: 0.8rem;
  font-weight: 600;
}

.progress-text {
  font-size: 0.9rem;
  color: var(--text-color);
  white-space: nowrap;
  min-width: 120px;
  text-align: right;
  font-weight: 500;
}

/* Vocabulary and Phrases Sections */
.vocabulary-section,
.phrases-section {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 25px;
  margin-bottom: 20px;
  box-shadow: var(--box-shadow);
}

.vocabulary-section h2,
.phrases-section h2 {
  color: var(--primary-color);
  margin-bottom: 20px;
  font-size: 1.5rem;
  font-weight: 600;
}

.vocabulary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 15px;
}

.vocabulary-item {
  background: var(--hover-bg);
  padding: 15px;
  border-radius: 12px;
  border-left: 4px solid var(--primary-color);
  transition: all 0.3s ease;
}

.vocabulary-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.vocab-word {
  font-weight: 600;
  color: var(--primary-color);
  font-size: 1.1rem;
  margin-bottom: 5px;
}

.vocab-meaning {
  color: var(--text-color);
  font-size: 0.95rem;
  margin-bottom: 8px;
  opacity: 0.9;
}

.vocab-example {
  color: var(--text-color);
  font-style: italic;
  font-size: 0.9rem;
  opacity: 0.8;
}

.phrases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px;
}

.phrase-item {
  background: var(--hover-bg);
  padding: 12px 16px;
  border-radius: 25px;
  text-align: center;
  color: var(--text-color);
  font-size: 0.95rem;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.phrase-item:hover {
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* Responsive Design for Modern Chat */
@media (max-width: 768px) {
  .conversation-container {
    padding: 15px;
  }
  
  .conversation-header {
    padding: 20px 15px;
    margin-bottom: 20px;
  }
  
  .conversation-header h1 {
    font-size: 2rem;
    flex-direction: column;
    gap: 10px;
  }
  
  .conversation-header .category-icon {
    font-size: 2.5rem;
  }
  
  .chat-container {
    border-radius: 20px;
    max-width: 100%;
  }
  
  .chat-header {
    padding: 16px 20px;
  }
  
  .contact-details h3 {
    font-size: 1rem;
  }
  
  .action-btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .chat-messages {
    padding: 20px;
    min-height: 400px;
    max-height: 500px;
  }
  
  .message-content {
    max-width: 90%;
    padding: 12px 16px 8px 16px;
  }

  .control-buttons {
    flex-wrap: wrap;
    gap: 10px;
  }

  .control-btn {
    min-width: 80px;
    padding: 10px 16px;
    font-size: 0.9rem;
  }
  
  .vocabulary-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .phrases-grid {
    grid-template-columns: 1fr;
  }
  
  .progress-container {
    flex-direction: column;
    gap: 10px;
  }
  
  .progress-text {
    text-align: center;
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .conversation-header h1 {
    font-size: 1.8rem;
    gap: 8px;
  }
  
  .conversation-header .category-icon {
    font-size: 2.2rem;
  }
  
  .chat-messages {
    min-height: 350px;
  }
  
  .message-content {
    max-width: 90%;
    padding: 8px 12px;
  }
  
  .message-text {
    font-size: 0.9rem;
  }
  
  .vocabulary-section,
  .phrases-section {
    padding: 20px;
  }
}