/* CSS Variables for Theming */
:root {
  --bg-primary: #f9fafb;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f3f4f6;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #ffffff;
  --border-color: #e5e7eb;
  --accent-color: #3b82f6;
    --accent-colors:#ffffff;
  --accent-hover: #2563eb;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --gradient-primary: linear-gradient(135deg, #3b82f6, #8b5cf6);
  --gradient-secondary: linear-gradient(135deg, #06b6d4, #3b82f6);
  --border-radius-sm: 0.375rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 0.75rem;
  --transition-ease: all 0.2s ease-in-out;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-tertiary: #ffffff;
  --border-color: #475569;
  --accent-color: #3b82f6;
  --accent-hover: #60a5fa;
  --success-color: #22c55e;
  --warning-color: #fbbf24;
  --error-color: #f87171;
}

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

  .fa-file-text {
    color: #3b82f6 !important;
  }
/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  transition: var(--transition-ease);
}

.app {
  display: flex;
  min-height: 100vh;
  overflow: hidden;
}

/* Sidebar Styles */
.sidebar {
  width: 320px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.sidebar-title-row h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.close-sidebar-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-ease);
}

.close-sidebar-btn:hover {
  background-color: var(--bg-tertiary);
}

.new-chat-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition-ease);
}


.btn-upgrade {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  font-weight: 500;
  font-size: 0.875rem;
  transition: var(--transition-ease);
}

.new-chat-btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.conversations-list {
  flex: 1;
  max-height: 67vh;
  overflow-y: auto;
  padding: 1rem;
  scroll-behavior: smooth;
}

.empty-conversations {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-secondary);
}

.empty-conversations i {
  font-size: 3rem;
  color: var(--text-tertiary);
  margin-bottom: 1rem;
}

.conversation-item {
  padding: 0.75rem;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  margin-bottom: 0.5rem;
  border: 1px solid transparent;
  transition: var(--transition-ease);
  position: relative;
}

.conversation-item:hover {
  background-color: var(--bg-tertiary);
  transform: translateX(4px);
}

.conversation-item.active {
  background-color: var(--bg-tertiary);
  border-color: var(--accent-color);
}

.conversation-title {
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  white-space: nowrap;
  max-width: 250px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conversation-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.delete-conversation {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: none;
  border: none;
  color: var(--error-color);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--border-radius-sm);
  opacity: 0;
  transition: var(--transition-ease);
}

.conversation-item:hover .delete-conversation {
  opacity: 1;
}

.delete-conversation:hover {
  background-color: var(--bg-tertiary);
}

.sidebar-footer {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  height: auto;
}

.controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.control-btn {
  font-size: small;
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  width: 35px;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-ease);
}

.control-btn-off {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-ease);
}

.control-btn:hover,
.control-btn-off:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.language-select {
  flex: 1;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: var(--border-radius-sm);
  font-size: 0.875rem;
  transition: var(--transition-ease);
}

.footer-text {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.footer-text-image {
  text-align: left;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Chat Area Styles */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.chat-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius-sm);
  transition: var(--transition-ease);
}

.menu-btn:hover {
  background-color: var(--bg-tertiary);
}

.header-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.bot-avatar {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.header-text h1 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

.user-info {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
}

.user-info span {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.user-info .control-btn-off {
  color: var(--text-secondary);
  font-size: small;
}

.user-info .control-btn-off:hover {
  color: var(--text-primary);
}

.messages-container {
  flex: 1;
  max-height: 77vh;
  overflow-y: auto;
  padding: 1rem;
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
}

.messages-container::-webkit-scrollbar {
  width: 6px;
}

.messages-container::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}

.messages-container::-webkit-scrollbar-thumb {
  background: var(--text-tertiary);
  border-radius: 3px;
}

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

.welcome-section {
  max-width: 48rem;
  margin: 0 auto;
  text-align: center;
}

.welcome-icon {
  width: 4rem;
  height: 4rem;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: white;
  font-size: 2rem;
}

.welcome-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.welcome-section>p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}

.suggested-questions {
  max-width: 48rem;
  margin: 0 auto;
}

.suggested-questions h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.questions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.question-btn {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1rem;
  text-align: left;
  cursor: pointer;
  transition: var(--transition-ease);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
}

.question-btn:hover {
  border-color: var(--accent-color);
  background-color: var(--bg-tertiary);
  transform: translateY(-2px);
}

.question-btn i {
  color: var(--accent-color);
  margin-top: 0.125rem;
  flex-shrink: 0;
}

.question-btn span {
  font-size: 0.875rem;
  color: var(--text-primary);
  line-height: 1.4;
}

.messages {
  max-width: 48rem;
  margin: 0 auto;
  padding: 1rem 0;
}

.message {
  display: flex;
  margin-bottom: 1.5rem;
}

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

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

.message-content {
  max-width: 48rem;
  width: 100%;
}

.message.user .message-content {
  margin-left: 3rem;
}

.message.assistant .message-content {
  margin-right: 3rem;
}

.message-wrapper {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.message.user .message-wrapper {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 2rem;
  height: 2rem;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: white;
  font-size: 0.875rem;
}

.message.user .message-avatar {
  background-color: var(--accent-color);
}

.message.assistant .message-avatar {
  background: var(--gradient-primary);
}

.message-bubble {
  border-radius: var(--border-radius-lg);
  padding: 1rem;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.message.user .message-bubble {
  background-color: var(--accent-color);
  margin-left: auto;
}

.message.assistant .message-bubble {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.message-text {
  font-size: 0.875rem;
  line-height: 1.5;
  white-space: pre-wrap;
    color: var(--text-primary);
}
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem; /* Đồng bộ với padding của .message-bubble */
}

.typing-dots {
  display: flex;
  gap: 0.25rem;
}

.typing-dot {
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--text-secondary); /* Sử dụng màu accent để nổi bật hơn */
  border-radius: 50%;
  animation: typing 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(-10px);
  }
}

.typing-indicator span {
  color: var(--text-primary); /* Sử dụng text-primary để tương phản tốt hơn */
  font-size: 0.875rem;
  font-weight: 500;
}

.message-sources {
  margin-top: 0.75rem;
}

.sources-title {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.source-item {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: var(--transition-ease);
}

.source-item:hover {
  background-color: var(--bg-secondary);
  transform: translateY(-2px);
}

.source-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.source-info {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
}

.source-info i {
  color: var(--text-tertiary);
  margin-top: 0.125rem;
  flex-shrink: 0;
}

.source-details {
  min-width: 0;
  flex: 1;
}

.source-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.source-excerpt {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.message-timestamp {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.message-timestamp i {
  font-size: 0.625rem;
}

.input-area {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 1.5rem;
}

.input-form {
  max-width: 48rem;
  margin: 0 auto;
}

.input-wrapper {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
}

#messageInput {
  flex: 1;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  line-height: 1.5;
  resize: none;
  min-height: 2.75rem;
  max-height: 7.5rem;
  color: var(--text-primary);
  transition: var(--transition-ease);
}

#messageInput:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

#messageInput::placeholder {
  color: var(--text-tertiary);
}

#sendBtn {
  background-color: var(--accent-color);
  color: white;
  border: none;
  border-radius: var(--border-radius-lg);
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: var(--transition-ease);
  flex-shrink: 0;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

#sendBtn:hover:not(:disabled) {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
}

#sendBtn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.input-hint {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 40;
}

.related-questions {
  margin-top: 1rem;
}

.related-questions .questions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.related-questions .question-btn {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 1rem;
  text-align: left;
  cursor: pointer;
  transition: var(--transition-ease);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
}

.related-questions .question-btn:hover {
  border-color: var(--accent-color);
  background-color: var(--bg-tertiary);
  transform: translateY(-2px);
}


.message .message.assistant .message-text{
  color: var(--text-tertiary);
}
.message-timestamp{
  color: var(--text-tertiary);
}

.related-questions .question-btn i {
  color: var(--accent-color);
  margin-top: 0.125rem;
  flex-shrink: 0;
}

.related-questions .question-btn span {
  font-size: 0.875rem;
  color: var(--text-primary);
  line-height: 1.4;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 50;
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .mobile-overlay.show {
    display: block;
  }

  .close-sidebar-btn {
    display: block;
  }

  .menu-btn {
    display: block;
  }

  .chat-area {
    width: 100%;
  }

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

  .message.user .message-content {
    margin-left: 1rem;
  }


  .message.assistant .message-content {
    margin-right: 1rem;
  }
}

@media (max-width: 640px) {
  .sidebar {
    width: 100vw;
  }

  .header-info {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .user-info {
    margin-left: 0;
    gap: 0.5rem;
    flex-wrap: nowrap;
  }

  .bot-avatar {
    width: 2rem;
    height: 2rem;
    font-size: 1rem;
  }

  .header-text h1 {
    font-size: 1rem;
  }

  .header-text p {
    font-size: 0.75rem;
  }

  .welcome-section {
    padding: 1rem;
  }

  .welcome-section h2 {
    font-size: 1.25rem;
  }

  .messages {
    padding: 0.5rem 0;
  }

  .message-content {
    max-width: 100%;
  }

  .message.user .message-content,
  .message.assistant .message-content {
    margin-left: 0.5rem;
    margin-right: 0.5rem;
  }

  .message-bubble {
    width: 85%;
  }

  .input-wrapper {
    gap: 0.5rem;
  }

  #sendBtn {
    padding: 0.75rem;
    width: 2.75rem;
  }

  .header-text {
    display: none;
  }

  .conversation-title {
    max-width: 325px;
  }

  .suggested-questions h3 {
    font-size: 1rem;
  }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-tertiary);
  border-radius: 3px;
}

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

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.3s ease-in-out;
}

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

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

#query-count-display {
    font-size: 14px;
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 5px;
    transition: color 0.3s ease;
}

#query-count-display.red {
    color: red;
}

#query-count-display.orange {
    color: orange;
}

#query-count-display.blue {
    color: #3b82f6;
}