/* ============================================================
 * pc-education.css - AI智能教育助手公共样式
 * 教育相关的通用组件样式
 * ============================================================ */

/* ===== 通用表单控件 ===== */
.form-select,
.form-input {
  padding: 7px 28px 7px 12px;
  border: 1px solid var(--border, #d1d5db);
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-primary, #1e293b);
  background: var(--card, #fff);
  outline: none;
  transition: border-color 0.15s;
  cursor: pointer;
  appearance: auto;
}
.form-select:focus,
.form-input:focus {
  border-color: var(--primary, #3b82f6);
}
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-input {
  background: #1e293b;
  color: #e2e8f0;
  border-color: #334155;
}

/* ===== 学科卡片网格（首页概览）===== */
.edu-subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
}

.edu-subject-card {
  background: var(--card, #fff);
  border: 2px solid var(--border, #e5e7eb);
  border-radius: 12px;
  padding: 0;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
  overflow: hidden;
}
.edu-subject-card:hover {
  border-color: var(--primary, #3b82f6);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}
.edu-subject-icon { font-size: 32px; margin-bottom: 8px; }
.edu-subject-name { font-weight: 700; font-size: 14px; margin-bottom: 6px; }
.edu-subject-score { font-size: 22px; font-weight: 800; }
.edu-subject-label { font-size: 12px; margin-top: 2px; }

/* ===== 进度条 ===== */
.edu-progress-bar {
  height: 6px;
  background: var(--border, #e5e7eb);
  border-radius: 3px;
  overflow: hidden;
}
.edu-progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.4s ease;
}

/* ===== 会话列表条目 ===== */
.edu-session-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light, #f0f0f0);
  cursor: pointer;
  transition: background 0.15s;
  border-radius: 6px;
}
.edu-session-item:last-child { border-bottom: none; }
.edu-session-item:hover { background: var(--bg-hover, #f8fafc); padding-left: 8px; }

/* ===== 薄弱知识点条目 ===== */
.edu-weak-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light, #f0f0f0);
}
.edu-weak-item:last-child { border-bottom: none; }

/* ===== 掌握度徽章 ===== */
.edu-mastery-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

/* ===== 通用标签/badge ===== */
.edu-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
  background: var(--bg-secondary, #f1f5f9);
  color: var(--text-secondary, #64748b);
}

/* ===== 学科切换标签 ===== */
.edu-tabs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-wrap: nowrap;
  margin-top: 8px;
}
.edu-tab-btn {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border, #e5e7eb);
  background: var(--card, #fff);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text-secondary, #64748b);
}
.edu-tab-btn:hover {
  border-color: var(--primary, #3b82f6);
  color: var(--primary, #3b82f6);
}
.edu-tab-btn.active {
  background: var(--primary, #3b82f6);
  color: #fff;
  border-color: var(--primary, #3b82f6);
}
/* 学段 Tab 行（多学段模式） */
.edu-tabs .subj-level-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.edu-tabs .subj-level-tab {
  padding: 5px 16px;
  border-radius: 6px;
  border: 1.5px solid var(--border, #e5e7eb);
  background: var(--bg-secondary, #f1f5f9);
  color: var(--text-secondary, #64748b);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.15s;
}
.edu-tabs .subj-level-tab:hover {
  border-color: var(--primary, #3b82f6);
  color: var(--primary, #3b82f6);
}
.edu-tabs .subj-level-tab.active {
  background: var(--primary, #3b82f6);
  color: #fff;
  border-color: var(--primary, #3b82f6);
}
/* 学科按钮行 */
.edu-tabs .subj-level-btns {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 4px 0 2px;
  border-top: 1px solid var(--border, #e5e7eb);
}

/* ===== 热力图容器 ===== */
.edu-heatmap-container {
  overflow-y: auto;
  max-height: 500px;
}

.heatmap-chapter {
  margin-bottom: 20px;
}
.heatmap-chapter-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary, #1e293b);
  padding: 8px 0;
  border-bottom: 2px solid var(--primary, #3b82f6);
  margin-bottom: 12px;
}

.heatmap-section {
  margin-bottom: 14px;
  padding-left: 8px;
}
.heatmap-section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary, #64748b);
  margin-bottom: 8px;
}

.heatmap-nodes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.heatmap-node {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid;
  cursor: default;
  min-width: 90px;
  text-align: center;
  transition: transform 0.15s;
}
.heatmap-node:hover { transform: scale(1.05); }
.heatmap-node-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary, #1e293b);
  margin-bottom: 3px;
}
.heatmap-node-label {
  font-size: 11px;
  font-weight: 500;
}

/* ===== 错因分析 ===== */
.edu-error-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--border-light, #f0f0f0);
}
.edu-error-item:last-child { border-bottom: none; }

.edu-error-type-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.edu-error-question {
  font-size: 13px;
  color: var(--text-primary, #1e293b);
  line-height: 1.5;
}

.edu-error-detail {
  font-size: 13px;
  color: var(--text-secondary, #64748b);
  background: var(--bg-secondary, #f8fafc);
  border-radius: 6px;
  padding: 8px 10px;
  margin: 6px 0;
  line-height: 1.6;
}

.edu-error-suggestion {
  font-size: 13px;
  color: #10b981;
  background: rgba(16,185,129,0.06);
  border-radius: 6px;
  padding: 8px 10px;
  margin-top: 6px;
  line-height: 1.6;
}

/* ===== 首页学段切换 Tabs ===== */
.home-level-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.home-level-tab {
  padding: 6px 16px;
  border: 1.5px solid var(--border, #e5e7eb);
  border-radius: 20px;
  background: transparent;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
  color: var(--text-secondary, #64748b);
}
.home-level-tab:hover {
  border-color: var(--primary, #3b82f6);
  color: var(--primary, #3b82f6);
}
.home-level-tab.active {
  background: var(--primary, #3b82f6);
  color: #fff;
  border-color: var(--primary, #3b82f6);
}

/* ===== 首页学科卡片（带封面图）===== */
.edu-subject-card-body {
  padding: 8px 12px 12px;
  text-align: center;
}
.edu-subject-card-name {
  padding: 0 0 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary, #1e293b);
}
.edu-subject-cover {
  width: 100%;
  height: 130px;
  object-fit: cover;
  display: block;
}
.edu-subject-cover-emoji {
  width: 100%;
  height: 130px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 52px;
  background: var(--bg-secondary, #f8fafc);
}