.landing-page {
  background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.landing-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
  text-align: center;
}

.landing-header {
  margin-bottom: 48px;
}

.logo-large {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
}

.logo-large .logo-icon {
  width: 80px;
  height: 80px;
  object-fit: contain;
}

.logo-large h1 {
  font-size: 48px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-large .tagline {
  font-size: 18px;
  color: var(--text-secondary);
}

.landing-desc {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

.landing-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.action-card {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  transition: var(--transition);
}

.action-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.action-card h3 {
  font-size: 20px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.action-card p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.landing-features {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.feature {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}

.feature-icon {
  font-size: 20px;
}

.auth-page {
  background-color: var(--bg-secondary);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-container {
  background-color: var(--bg-color);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: 32px;
}

.auth-header h1 {
  font-size: 28px;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.auth-desc {
  color: var(--text-secondary);
  font-size: 14px;
}

.back-link {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 14px;
}

.back-link:hover {
  color: var(--primary-color);
}

.auth-form {
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 16px;
  background-color: var(--bg-color);
  color: var(--text-primary);
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(48, 129, 208, 0.1);
}

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

.form-group .hint {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}

.auth-footer {
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
}

.result-panel {
  text-align: center;
}

.result-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.result-panel h2 {
  font-size: 24px;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.account-display {
  background-color: var(--bg-secondary);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.account-display .label {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.account-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: 2px;
}

.warning {
  color: var(--warning-color);
  font-size: 14px;
  margin-bottom: 24px;
}

@media (max-width: 480px) {
  .auth-container {
    padding: 24px;
  }
  
  .auth-header h1 {
    font-size: 24px;
  }
  
  .account-number {
    font-size: 24px;
  }
}

.chat-container {
  display: flex;
  height: calc(100vh - 140px);
  max-width: 1200px;
  margin: 0 auto;
}

.chat-sidebar {
  width: 260px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-header h3 {
  font-size: 14px;
  color: var(--text-secondary);
}

.new-chat-btn {
  padding: 6px 12px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.new-chat-btn:hover {
  background-color: var(--primary-hover);
}

.conversation-list {
  flex: 1;
  overflow-y: auto;
}

.conversation-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

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

.conversation-title {
  font-size: 14px;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.delete-conversation {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 16px;
  opacity: 0;
  transition: var(--transition);
}

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

.delete-conversation:hover {
  color: var(--error-color);
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-color);
}

.chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.chat-body::-webkit-scrollbar {
  width: 6px;
}

.chat-body::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.welcome-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 60px 20px;
  max-width: 600px;
  margin: auto;
}

.welcome-icon {
  font-size: 64px;
  margin-bottom: 24px;
}

.welcome-title {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.welcome-text {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.quick-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 400px;
}

.quick-action {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
  font-size: 13px;
  color: var(--text-primary);
}

.quick-action:hover {
  background-color: var(--bg-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

.action-icon {
  font-size: 20px;
}

.action-text {
  flex: 1;
}

.message {
  max-width: 80%;
  padding: 14px 18px;
  border-radius: 12px;
  line-height: 1.6;
  position: relative;
}

.user-message {
  background-color: var(--primary-color);
  color: white;
  align-self: flex-end;
}

.ai-message {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  align-self: flex-start;
}

.message-content {
  white-space: pre-wrap;
  word-break: break-word;
}

.message-content code {
  background-color: rgba(0, 0, 0, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 13px;
}

.message-content pre {
  background-color: var(--bg-color);
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 8px 0;
}

.message-content pre code {
  background: none;
  padding: 0;
}

.timestamp {
  font-size: 11px;
  opacity: 0.7;
  margin-top: 6px;
  text-align: right;
}

.copy-button {
  padding: 6px 12px;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  margin-top: 8px;
  color: var(--text-secondary);
  transition: var(--transition);
  display: inline-block;
}

.copy-button:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

[data-theme="dark"] .copy-button {
  background-color: var(--bg-color);
  border-color: var(--border-color);
}

[data-theme="dark"] .copy-button:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.loading-message {
  display: flex;
  align-items: center;
  gap: 8px;
}

.loading-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.chat-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-color);
}

.chat-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.input-container {
  display: flex;
  gap: 12px;
  align-items: flex-end;
}

.input-wrapper {
  flex: 1;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  transition: var(--transition);
}

.input-wrapper:focus-within {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(48, 129, 208, 0.1);
}

.message-input {
  width: 100%;
  padding: 14px 16px;
  border: none;
  background: transparent;
  font-size: 15px;
  resize: none;
  min-height: 52px;
  max-height: 200px;
  outline: none;
  color: var(--text-primary);
  font-family: inherit;
}

.message-input::placeholder {
  color: var(--text-secondary);
}

.button-group {
  display: flex;
  gap: 8px;
}

.send-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 16px;
  height: 52px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
}

.send-button:hover:not(:disabled) {
  background-color: var(--primary-hover);
  transform: scale(1.02);
}

.send-button:disabled {
  background-color: var(--border-color);
  color: var(--text-secondary);
  cursor: not-allowed;
}

.work-button {
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.work-button:not(:disabled) {
  color: var(--text-primary);
}

.footer-hint {
  text-align: center;
}

.hint-text {
  font-size: 12px;
  color: var(--text-secondary);
  opacity: 0.8;
}

.tools-container {
  padding: 60px 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.tools-header {
  text-align: center;
  margin-bottom: 40px;
}

.tools-title {
  font-size: 36px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.tools-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  transition: var(--transition);
  text-decoration: none;
  color: var(--text-primary);
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.tool-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.tool-name {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.tool-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.tool-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tool-tag {
  padding: 4px 12px;
  background-color: var(--bg-secondary);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .chat-sidebar {
    display: none;
  }
  
  .chat-container {
    height: calc(100vh - 100px);
  }
  
  .chat-body {
    padding: 16px;
  }
  
  .welcome-container {
    padding: 40px 16px;
  }
  
  .welcome-icon {
    font-size: 48px;
  }
  
  .welcome-title {
    font-size: 24px;
  }
  
  .quick-actions {
    grid-template-columns: 1fr;
  }
  
  .message {
    max-width: 90%;
  }
  
  .chat-footer {
    padding: 12px 16px;
  }
  
  .send-button {
    height: 44px;
    padding: 0 12px;
    font-size: 13px;
  }
  
  .button-text {
    display: none;
  }
}