/* ========== 科目选择页样式 ========== */
.subject-count-select {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.subject-count-btn {
  flex: 1;
  min-width: 60px;
  padding: 10px 8px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
  font-size: 0.9rem;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.subject-count-btn:active {
  transform: scale(0.95);
}

.subject-count-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.subject-count-btn.selected {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(26,115,232,0.25);
  transform: scale(1.04);
}

.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
}

.subject-chip {
  padding: 14px 10px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
  font-weight: 500;
  user-select: none;
}

.subject-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.subject-chip.selected {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
}

.subject-chip.disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.subject-chip.disabled:hover {
  border-color: var(--border);
  color: var(--text);
}

.subject-hint {
  margin-top: 8px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  min-height: 20px;
}

/* ========== 配置页样式 ========== */
.config-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.config-row label {
  min-width: 80px;
  font-weight: 500;
}

.difficulty-select {
  display: flex;
  gap: 8px;
}

.difficulty-btn {
  padding: 8px 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.difficulty-btn:hover { border-color: var(--primary); }
.difficulty-btn.selected { border-color: var(--primary); background: var(--primary); color: #fff; }

.difficulty-btn[data-diff="easy"].selected { border-color: var(--success); background: var(--success); }
.difficulty-btn[data-diff="medium"].selected { border-color: var(--warning); background: var(--warning); color: #333; }
.difficulty-btn[data-diff="hard"].selected { border-color: var(--danger); background: var(--danger); }

.config-summary {
  background: var(--primary-light);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-top: 20px;
}

.config-summary h4 {
  margin-bottom: 8px;
}

.config-summary p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

/* ========== 年级选择器样式 ========== */
.grade-select {
  margin-bottom: 18px;
  padding: 12px 16px;
  background: var(--bg-gray, #f8f9fa);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.grade-select-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.grade-select-groups {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.grade-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.grade-group-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted, #999);
  margin-right: 2px;
  white-space: nowrap;
}

.grade-btn {
  padding: 4px 10px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}

.grade-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.grade-btn.selected {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

/* ========== 教材版本选择器 ========== */
.textbook-select {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.textbook-btn {
  padding: 6px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
}

.textbook-btn:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}

.textbook-btn.selected {
  border-color: var(--primary);
  background: #e8f0fe;
  color: var(--primary);
  font-weight: 600;
}

/* ========== 知识点选择器 ========== */
.kp-section {
  margin-bottom: 16px;
  padding: 12px 16px;
  background: var(--primary-light, #f0f7ff);
  border-radius: var(--radius);
  border: 1px solid rgba(26, 115, 232, 0.15);
}

.kp-section-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.kp-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.kp-chip {
  padding: 4px 12px;
  border: 1.5px solid var(--border);
  border-radius: 16px;
  background: #fff;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}

.kp-chip:hover {
  border-color: var(--primary);
  background: #f0f7ff;
}

.kp-chip.selected {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

/* 年级信息条（从主界面选择后展示） */
.grade-info-bar {
  background: #e8f5e9;
  color: #2e7d32;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.grade-info-bar strong {
  font-weight: 700;
}
.grade-info-bar small {
  font-size: 0.75rem;
  opacity: 0.7;
}
/* ========== 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);
}