/* ========================================
   AI聊天页面样式
   ======================================== */

.ai-chat-page {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  font-family: var(--font-sans, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
  overflow: hidden;
}

/* 返回主页按钮 */
.back-to-home {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1000;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: 12px;
  color: #374151;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.back-btn:hover {
  background: rgba(255, 255, 255, 1);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* AI聊天容器 */
.ai-chat-container {
  max-width: 800px;
  margin: 0 auto;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.1);
}

/* 头部 */
.chat-header {
  padding: 1.5rem 2rem;
  background: linear-gradient(135deg, #3b82f6, #1e40af);
  color: white;
  border-radius: 0;
}

.header-content {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.ai-avatar {
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.header-info h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.status {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  opacity: 0.9;
}

.status.connected {
  color: #10b981;
}

.status.connecting {
  color: #f59e0b;
}

.status.error {
  color: #ef4444;
}

/* 聊天消息区域 */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 2rem;
  background: #f8fafc;
}

/* 消息样式 */
.message {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.3s ease;
}

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ai-message .message-avatar {
  background: linear-gradient(135deg, #3b82f6, #1e40af);
  color: white;
}

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

.user-message .message-avatar {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
}

.message-content {
  flex: 1;
  background: white;
  padding: 1rem 1.25rem;
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.user-message .message-content {
  background: linear-gradient(135deg, #3b82f6, #1e40af);
  color: white;
}

.message-content p {
  margin: 0 0 0.75rem;
  line-height: 1.6;
}

.message-content p:last-child {
  margin-bottom: 0;
}

.message-content ul {
  margin: 0.75rem 0;
  padding-left: 1.5rem;
}

.message-content li {
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

/* 欢迎消息 */
.welcome-message {
  margin-bottom: 2rem;
}

/* 输入区域 */
.chat-input-area {
  padding: 1.5rem 2rem;
  background: white;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.input-container {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
}

#message-input {
  flex: 1;
  min-height: 44px;
  max-height: 120px;
  padding: 0.75rem 1rem;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  resize: none;
  transition: all 0.3s ease;
  background: #f9fafb;
}

#message-input:focus {
  outline: none;
  border-color: #3b82f6;
  background: white;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.send-btn {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, #3b82f6, #1e40af);
  border: none;
  border-radius: 12px;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.send-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.3);
}

.send-btn:disabled {
  background: #d1d5db;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
  font-size: 0.75rem;
  color: #6b7280;
}

/* 加载动画 */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
}

.loading-spinner {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #e5e7eb;
  border-top: 3px solid #3b82f6;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

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

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

/* 移动端适配 */
@media (max-width: 768px) {
  .ai-chat-container {
    height: 100vh;
    max-width: 100%;
  }
  
  .chat-header {
    padding: 1rem 1.5rem;
  }
  
  .header-info h1 {
    font-size: 1.25rem;
  }
  
  .chat-messages {
    padding: 1rem 1.5rem;
  }
  
  .chat-input-area {
    padding: 1rem 1.5rem;
  }
  
  .back-to-home {
    top: 0.5rem;
    left: 0.5rem;
  }
  
  .back-btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
  }
  
  .message-content {
    padding: 0.875rem 1rem;
  }
  
  .input-container {
    gap: 0.5rem;
  }
  
  #message-input {
    font-size: 16px; /* 防止iOS缩放 */
  }
}

/* 滚动条样式 */
.chat-messages::-webkit-scrollbar {
  width: 6px;
}

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

.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.3);
}