// 全局样式变量
:root {
  // 主题色彩
  --primary-color: #667eea;
  --primary-light: #8fa4f3;
  --primary-dark: #4c63d2;
  --secondary-color: #764ba2;
  --accent-color: #f093fb;
  
  // 渐变色
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-warning: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
  
  // 文字颜色
  --text-primary: #2c3e50;
  --text-secondary: #7f8c8d;
  --text-light: #bdc3c7;
  --text-white: #ffffff;
  
  // 背景色
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-dark: #2c3e50;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  
  // 边框和阴影
  --border-color: #e9ecef;
  --border-radius: 12px;
  --border-radius-small: 8px;
  --border-radius-large: 16px;
  --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  --box-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.15);
  
  // 间距
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
}

// 重置样式
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

// 通用工具类
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-column {
  display: flex;
  flex-direction: column;
}

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

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

.overflow-hidden {
  overflow: hidden;
}

.overflow-auto {
  overflow: auto;
}

// 渐变文字
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
}

// 玻璃态效果
.glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius);
}

// 卡片样式
.card {
  background: var(--bg-primary);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
  
  &:hover {
    box-shadow: var(--box-shadow-hover);
    transform: translateY(-2px);
  }
}

// 按钮样式增强
.ant-btn {
  border-radius: var(--border-radius-small);
  font-weight: 500;
  transition: all 0.3s ease;
  
  &.gradient-btn {
    background: var(--gradient-primary);
    border: none;
    color: white;
    
    &:hover {
      background: var(--gradient-primary);
      opacity: 0.9;
      transform: translateY(-1px);
      box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    }
  }
}

// 输入框样式增强
.ant-input {
  border-radius: var(--border-radius-small);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  
  &:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
  }
}

// 消息气泡样式
.message-bubble {
  max-width: 70%;
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  word-wrap: break-word;
  
  &.user {
    background: var(--gradient-primary);
    color: white;
    margin-left: auto;
    border-bottom-right-radius: var(--spacing-xs);
  }
  
  &.assistant {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: var(--spacing-xs);
  }
}

// 响应式设计
@media (max-width: 768px) {
  .message-bubble {
    max-width: 85%;
  }
  
  .card {
    padding: var(--spacing-md);
  }
}

// 动画类
.bounce-in {
  animation: bounceIn 0.6s ease;
}

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

.fade-in-up {
  animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

// 加载动画
.loading-dots {
  display: inline-block;
  
  &::after {
    content: '';
    animation: dots 1.5s steps(5, end) infinite;
  }
}

@keyframes dots {
  0%, 20% {
    color: rgba(0, 0, 0, 0);
    text-shadow: 0.25em 0 0 rgba(0, 0, 0, 0), 0.5em 0 0 rgba(0, 0, 0, 0);
  }
  40% {
    color: black;
    text-shadow: 0.25em 0 0 rgba(0, 0, 0, 0), 0.5em 0 0 rgba(0, 0, 0, 0);
  }
  60% {
    text-shadow: 0.25em 0 0 black, 0.5em 0 0 rgba(0, 0, 0, 0);
  }
  80%, 100% {
    text-shadow: 0.25em 0 0 black, 0.5em 0 0 black;
  }
}