* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Microsoft YaHei', Arial, sans-serif;
  background-color: #f5f7fa;
  color: #333;
}

.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* 头部样式 */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  height: 60px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.header-left .logo {
  font-size: 20px;
  font-weight: bold;
}

.header-center, .header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.month-input, .user-select {
  padding: 6px 12px;
  border: none;
  border-radius: 4px;
  background: rgba(255,255,255,0.9);
  font-size: 14px;
  cursor: pointer;
}

/* 主内容区 */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* 侧边栏 */
.sidebar {
  width: 200px;
  background: white;
  box-shadow: 2px 0 8px rgba(0,0,0,0.05);
  overflow-y: auto;
}

.menu {
  padding: 20px 0;
}

.menu-item {
  display: flex;
  align-items: center;
  padding: 15px 20px;
  cursor: pointer;
  transition: all 0.3s;
  border-left: 3px solid transparent;
}

.menu-item:hover {
  background: #f0f2f5;
}

.menu-item.active {
  background: #e6f7ff;
  border-left-color: #1890ff;
  color: #1890ff;
}

.menu-icon {
  font-size: 20px;
  margin-right: 12px;
}

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

/* 内容区 */
.content {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  background: #f5f7fa;
}

/* 通用卡片样式 */
.card {
  background: white;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.card-title {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 15px;
  color: #333;
  border-bottom: 2px solid #1890ff;
  padding-bottom: 10px;
}

/* 表格样式 */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

th, td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #e8e8e8;
}

th {
  background: #fafafa;
  font-weight: 600;
  color: #666;
}

tr:hover {
  background: #f5f5f5;
}

/* 按钮样式 */
.btn {
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
}

.btn-primary {
  background: #1890ff;
  color: white;
}

.btn-primary:hover {
  background: #40a9ff;
}

.btn-success {
  background: #52c41a;
  color: white;
}

.btn-success:hover {
  background: #73d13d;
}

.btn-danger {
  background: #ff4d4f;
  color: white;
}

.btn-danger:hover {
  background: #ff7875;
}

.btn-default {
  background: #f0f0f0;
  color: #333;
}

.btn-default:hover {
  background: #d9d9d9;
}

/* 表单样式 */
.form-group {
  margin-bottom: 15px;
}

.form-label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
  color: #666;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid #d9d9d9;
  border-radius: 4px;
  font-size: 14px;
  transition: border-color 0.3s;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: #1890ff;
}

/* 状态标签 */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 12px;
}

.tag-success {
  background: #f6ffed;
  color: #52c41a;
  border: 1px solid #b7eb8f;
}

.tag-warning {
  background: #fffbe6;
  color: #faad14;
  border: 1px solid #ffe58f;
}

.tag-info {
  background: #e6f7ff;
  color: #1890ff;
  border: 1px solid #91d5ff;
}

/* 排行榜 */
.rank-list {
  list-style: none;
}

.rank-item {
  display: flex;
  align-items: center;
  padding: 12px;
  border-bottom: 1px solid #f0f0f0;
  cursor: pointer;
}

.rank-item:hover {
  background: #f5f5f5;
}

.rank-number {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  margin-right: 15px;
}

.rank-number.top-1 {
  background: #ffd700;
  color: white;
}

.rank-number.top-2 {
  background: #c0c0c0;
  color: white;
}

.rank-number.top-3 {
  background: #cd7f32;
  color: white;
}

.rank-name {
  flex: 1;
  font-size: 15px;
}

.rank-score {
  font-size: 18px;
  font-weight: bold;
  color: #1890ff;
}

/* 图表容器 */
.chart-container {
  position: relative;
  height: 400px;
  margin: 20px 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .sidebar {
    width: 60px;
  }
  
  .menu-text {
    display: none;
  }
  
  .menu-item {
    justify-content: center;
  }
  
  .header-center {
    display: none;
  }
}