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

:root {
  --primary-color: #4f46e5;
  --primary-hover: #4338ca;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --bg-primary: #ffffff;
  --bg-secondary: #f3f4f6;
  --border-color: #e5e7eb;
  --sidebar-width: 240px;
  --header-height: 60px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
}

/* 页面布局 */
.page {
  display: none;
  min-height: 100vh;
}

.page.active {
  display: flex;
}

/* 登录页 */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
  background: var(--bg-primary);
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  width: 100%;
  max-width: 400px;
}

.login-box h1 {
  text-align: center;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.login-box .subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.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;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.error-msg {
  color: var(--danger-color);
  text-align: center;
  margin-top: 15px;
  font-size: 14px;
}

/* 按钮样式 */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-block {
  width: 100%;
  padding: 12px;
  font-size: 16px;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

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

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

.btn-secondary:hover {
  background: var(--border-color);
}

.btn-success {
  background: var(--success-color);
  color: white;
}

.btn-success:hover {
  background: #059669;
}

.btn-danger {
  background: var(--danger-color);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* 主页面布局 */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  z-index: 100;
  transition: transform 0.3s;
}

.logo {
  padding: 20px;
  font-size: 18px;
  font-weight: bold;
  color: var(--primary-color);
  border-bottom: 1px solid var(--border-color);
}

.nav-menu {
  flex: 1;
  padding: 20px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s;
}

.nav-item:hover, .nav-item.active {
  background: var(--bg-secondary);
  color: var(--primary-color);
  border-left: 3px solid var(--primary-color);
}

.nav-item .icon {
  margin-right: 12px;
  font-size: 18px;
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid var(--border-color);
}

.user-info {
  margin-bottom: 15px;
  font-size: 14px;
}

.role-tag {
  background: var(--primary-color);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  margin-left: 8px;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 20px;
  min-height: 100vh;
}

.menu-toggle {
  display: none;
  position: fixed;
  top: 15px;
  left: 15px;
  z-index: 101;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}

/* 内容页 */
.content-page {
  display: none;
}

.content-page.active {
  display: block;
}

.content-page h2 {
  margin-bottom: 20px;
  color: var(--text-primary);
}

/* 统计卡片 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: var(--bg-primary);
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: bold;
  color: var(--primary-color);
}

.stat-card .stat-label {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 8px;
}

/* 图表容器 */
.chart-container, .dept-chart-container {
  background: var(--bg-primary);
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  margin-bottom: 20px;
}

.chart-container canvas, .dept-chart-container canvas {
  max-height: 300px;
}

/* 工具栏 */
.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.search-box {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-left: auto;
}

.search-box input, .search-box select {
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
}

/* 表格 */
.table-container {
  background: var(--bg-primary);
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th, .data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 13px;
}

.data-table tr:hover {
  background: var(--bg-secondary);
}

.data-table .loading {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
}

.data-table .actions {
  display: flex;
  gap: 8px;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.pagination button {
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  border-radius: 6px;
  cursor: pointer;
}

.pagination button.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* 弹窗 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-primary);
  padding: 30px;
  border-radius: 12px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-secondary);
}

.modal-close:hover {
  color: var(--text-primary);
}

/* 表单样式 */
.modal-form .form-group {
  margin-bottom: 20px;
}

.modal-form label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.modal-form input, .modal-form select, .modal-form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
}

.modal-form textarea {
  resize: vertical;
  min-height: 100px;
}

.modal-form .btn-group {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* 批量添加区域 */
.batch-area {
  margin-top: 20px;
}

.batch-area textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: monospace;
  font-size: 14px;
  min-height: 150px;
}

.batch-area .hint {
  margin-top: 10px;
  color: var(--text-secondary);
  font-size: 13px;
}

.batch-result {
  margin-top: 15px;
  padding: 15px;
  border-radius: 6px;
  background: var(--bg-secondary);
}

.batch-result.success {
  background: #d1fae5;
  color: #065f46;
}

.batch-result.error {
  background: #fee2e2;
  color: #991b1b;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.active {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
    padding-top: 70px;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .search-box {
    margin-left: 0;
    width: 100%;
  }
  
  .search-box input, .search-box select {
    flex: 1;
    min-width: 120px;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .toolbar {
    flex-direction: column;
  }
  
  .search-box {
    flex-direction: column;
  }
  
  .search-box input, .search-box select, .search-box button {
    width: 100%;
  }
}