// ============================================
// 全局变量定义
// ============================================
@primary-color: #667eea;
@secondary-color: #764ba2;
@text-color: #333;
@text-secondary: #666;
@text-muted: #999;
@border-color: #ddd;
@background-light: #f5f5f5;
@white: #fff;

@gradient-primary: linear-gradient(135deg, @primary-color 0%, @secondary-color 100%);

// 边距
@spacing-xs: 5px;
@spacing-sm: 10px;
@spacing-md: 15px;
@spacing-lg: 20px;
@spacing-xl: 30px;

// 圆角
@radius-sm: 5px;
@radius-md: 8px;
@radius-lg: 10px;
@radius-xl: 12px;

// 阴影
@shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
@shadow-md: 0 4px 15px rgba(0, 0, 0, 0.1);
@shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.1);

// ============================================
// 基础样式重置
// ============================================
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Microsoft YaHei', sans-serif;
  background: @background-light;
  color: @text-color;
}

// ============================================
// 全局容器布局（主应用容器）
// ============================================
.container {
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: @spacing-sm;
  background: @gradient-primary;
  overflow: hidden;
}

.main-content {
  flex: 1;
  display: flex;
  gap: @spacing-sm;
  min-height: 0;
  overflow: hidden;
}

// ============================================
// 全局工具类
// ============================================
.mt10 {
  margin-top: @spacing-sm;
}

.mt60 {
  margin-top: @spacing-xl;
}

// ============================================
// 头部样式
// ============================================
.header {
  text-align: left;
  color: @white;
  margin-bottom: @spacing-sm;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;

  h1 {
    font-size: 20px;
    margin-bottom: 0;
    text-align: left;
  }
}

.header-left {
  display: flex;
  align-items: center;
  gap: @spacing-sm;
  flex: 1;
}

.header-right {
  display: flex;
  align-items: center;
  gap: @spacing-sm;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  font-size: 14px;
  white-space: nowrap;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ff4444;

  &.connected {
    background: #44ff44;
    animation: pulse 2s infinite;
  }
}

// ============================================
// 侧边栏样式
// ============================================
.sidebar {
  width: 200px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: @radius-lg;
  padding: @spacing-lg 0;
  box-shadow: @shadow-sm;
  flex-shrink: 0;
}

.sidebar-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.menu-item {
  padding: 15px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
  color: @text-color;

  &:hover {
    background: rgba(102, 126, 234, 0.1);
  }

  &.active {
    background: rgba(102, 126, 234, 0.15);
    border-left-color: @primary-color;
    color: @primary-color;
    font-weight: bold;

    .menu-icon {
      color: @primary-color;
    }
  }
}

.menu-icon {
  font-size: 18px;
  width: 20px;
  display: inline-block;
  text-align: center;
  color: @text-secondary;
  flex-shrink: 0;
}

.menu-text {
  font-size: 15px;
}

// ============================================
// 内容区域
// ============================================
.content-area {
  flex: 1;
  background: rgba(255, 255, 255, 0.95);
  border-radius: @radius-lg;
  padding: @spacing-xl;
  box-shadow: @shadow-sm;
  overflow-y: auto;
  min-width: 0;
  position: relative;

  &.full-width {
    padding: 0;
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
  }
}

.page-title {
  font-size: 24px;
  font-weight: bold;
  color: @text-color;
  margin-bottom: @spacing-xl;
  padding-bottom: 15px;
  border-bottom: 2px solid @primary-color;
}

.placeholder-content {
  text-align: center;
  padding: 40px 20px;
  color: @text-muted;
  font-size: 16px;
}

// ============================================
// 启动加载动画（全局，在 HTML 中使用）
// ============================================
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: @gradient-primary;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 1;
  transition: opacity 0.5s ease-out;

  &.hidden {
    opacity: 0;
    pointer-events: none;
  }
}

.loading-content {
  text-align: center;
  color: @white;
}

.loading-logo {
  margin-bottom: @spacing-xl;
}

.logo-circle {
  width: 80px;
  height: 80px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: @white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

.loading-text {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: @spacing-lg;
  animation: pulse 2s ease-in-out infinite;
}

.loading-progress {
  width: 200px;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  overflow: hidden;
  margin: 0 auto;
}

.progress-bar-animated {
  height: 100%;
  background: @white;
  border-radius: 2px;
  animation: progress 1.5s ease-in-out infinite;
}

// ============================================
// 全局动画
// ============================================
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideDown {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes progress {
  0% {
    width: 0%;
    transform: translateX(0);
  }
  50% {
    width: 70%;
    transform: translateX(0);
  }
  100% {
    width: 100%;
    transform: translateX(0);
  }
}