/* ========== 题库管理页面样式 ========== */

/* 标签切换 */
.qmg-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--border);
}

.qmg-tab {
  padding: 10px 24px;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

.qmg-tab:hover { color: var(--primary); }
.qmg-tab.active { color: var(--primary); border-bottom-color: var(--primary); }

/* 筛选栏 */
.qmg-filters {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

/* 题目表格 */
.qmg-table-wrap {
  overflow-x: auto;
  margin-bottom: 16px;
}

.qmg-table th,
.qmg-table td {
  white-space: nowrap;
}

.qmg-content-cell {
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap !important;
}

/* 分页 */
.qmg-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

/* 统计概览卡片 */
.qmg-stats-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 16px;
  margin-bottom: 0;
}

.qmg-stat-card {
  text-align: center;
  padding: 20px 16px;
  background: var(--bg);
  border-radius: var(--radius);
}

.qmg-stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}

.qmg-stat-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* 分析图表：分布条 */
.qmg-stat-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.qmg-stat-label {
  min-width: 60px;
  font-size: 0.85rem;
  font-weight: 500;
}

.qmg-stat-bar {
  flex: 1;
  height: 20px;
  background: var(--bg);
  border-radius: 10px;
  overflow: hidden;
}

.qmg-stat-fill {
  height: 100%;
  background: var(--success);
  border-radius: 10px;
  min-width: 2px;
  transition: width 0.4s ease;
}

.qmg-stat-value {
  min-width: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: right;
}

/* 分析双列布局 */
.qmg-analysis-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 768px) {
  .qmg-analysis-grid {
    grid-template-columns: 1fr;
  }
}

/* 科目×难度矩阵 */
.qmg-matrix th,
.qmg-matrix td {
  text-align: center;
  padding: 8px 12px;
}

.qmg-matrix th:first-child,
.qmg-matrix td:first-child {
  text-align: left;
}

/* 编辑弹窗表单 */
.qmg-edit-form {
  max-height: 60vh;
  overflow-y: auto;
  padding-right: 8px;
}

.qmg-option-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.qmg-option-letter {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
}

.qmg-option-row .form-input {
  flex: 1;
}

.qmg-option-del {
  flex-shrink: 0;
}

/* 知识点标签单元格 */
.qmg-kp-cell {
  max-width: 200px;
  min-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: normal !important;
  word-break: break-word;
  line-height: 1.6;
}

.qmg-kp-cell .question-tag {
  margin: 1px 2px;
  display: inline-block;
  font-size: 0.68rem;
  padding: 1px 6px;
}

/* 知识点展开按钮 */
.kp-expand-btn {
  display: inline-block;
  font-size: 0.65rem;
  color: #1a73e8;
  cursor: pointer;
  padding: 0 4px;
  margin-left: 2px;
  border: 1px dashed #c5d9f8;
  border-radius: 4px;
  background: #f0f7ff;
  line-height: 1.4;
}
.kp-expand-btn:hover {
  background: #d0e3fd;
}

/* 知识点折叠容器 */
.kp-tags-wrap {
  display: inline;
  line-height: 2;
}

/* 知识点标签专用样式 */
.kp-tag {
  white-space: nowrap;
}

/* 全选/行复选框 */
.qmg-table input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--primary);
}

#qmgSelectAll {
  margin: 0;
}

#btnBatchDelete {
  transition: opacity 0.2s;
}

/* 用户详情弹窗 */
.detail-item {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}
.detail-label {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}
.detail-value {
  font-size: 0.9rem;
  color: var(--text-primary);
}
.clickable-row:hover {
  background: var(--primary-light) !important;
}
/* ========== 暗色模式适配 ========== */
[data-theme="dark"] .modal-overlay {
  background: rgba(0,0,0,0.7);
}
[data-theme="dark"] .modal-content {
  background: var(--bg-card);
  color: var(--text);
}
[data-theme="dark"] .history-table {
  color: var(--text);
}
[data-theme="dark"] .history-table td {
  color: var(--text-secondary);
}
[data-theme="dark"] .history-table tr:hover {
  background: #2a2a40;
}
[data-theme="dark"] input, [data-theme="dark"] select {
  background: var(--bg-input);
  color: var(--text);
  border-color: var(--border);
}
[data-theme="dark"] ::placeholder {
  color: var(--text-muted);
}