/* ═══════════════════════════════════════════════════════
   views/mistakeBook.css — 错题本视图样式
   奶白马卡龙 · 液态玻璃风格
   ═══════════════════════════════════════════════════════ */

.mb-page {
  padding: 0 16px 16px;
  width: 100%;
}

/* ── 顶部标题栏 ── */
.mb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0 12px;
}
.mb-title-wrap { display: flex; align-items: center; gap: 8px; }
.mb-title { font-size: 18px; font-weight: 700; color: #2D1B69; margin: 0; }
.mb-unreviewed-badge {
  font-size: 12px; font-weight: 700;
  background: #EF4444; color: #fff;
  padding: 2px 9px; border-radius: 20px;
}

/* ── 筛选栏 ── */
.mb-filter-bar {
  padding: 12px 14px; margin-bottom: 10px;
  background: rgba(255,255,255,0.70);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-radius: 16px; border: 1px solid rgba(255,255,255,0.88);
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.mb-filter-row { display: flex; align-items: center; gap: 10px; }
.mb-filter-select-wrap { flex: 1; min-width: 0; }
.mb-filter-select {
  width: 100%; padding: 7px 10px;
  border-radius: 12px; border: 1px solid rgba(167,139,250,0.20);
  background: rgba(255,255,255,0.85);
  font-size: 13px; color: #374151; font-family: inherit; outline: none;
}
.mb-status-tabs { display: flex; gap: 4px; flex-shrink: 0; }
.mb-status-tab {
  padding: 6px 10px; border-radius: 12px; border: none;
  background: rgba(255,255,255,0.55); font-size: 12px; color: #9CA3AF;
  cursor: pointer; font-family: inherit; font-weight: 600;
  transition: all 0.15s ease; border: 1px solid rgba(255,255,255,0.70);
}
.mb-status-tab.active { background: linear-gradient(135deg, #FFB7C5, #FF8FAE); color: #fff; border-color: transparent; }

/* ── 统计行 ── */
.mb-stats-row {
  display: flex; align-items: center; justify-content: space-between;
  margin: 0 2px 10px;
}
.mb-stats-text { font-size: 13px; color: #9CA3AF; }
.mb-stats-text b { color: #4B3B8C; }
.mb-clear-all-btn {
  font-size: 12px; color: #EA580C;
  border: none; background: none;
  cursor: pointer; font-family: inherit; font-weight: 600; padding: 4px 0;
}

/* ── 错题卡片 ── */
.mb-list { display: flex; flex-direction: column; gap: 10px; }
.mb-card {
  padding: 14px 14px 12px; margin-bottom: 0;
  background: rgba(255,255,255,0.70);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-radius: 20px; border: 1px solid rgba(255,255,255,0.88);
  box-shadow: 0 4px 20px rgba(0,0,0,0.05), inset 0 1px 0 rgba(255,255,255,0.95);
  animation: mbSlideIn 0.3s ease both;
}
@keyframes mbSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.mb-card-header {
  display: flex; align-items: flex-start;
  justify-content: space-between; margin-bottom: 8px;
}
.mb-card-meta { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.mb-lesson-tag {
  font-size: 11px; font-weight: 600;
  background: rgba(167,139,250,0.12); color: #6B7280;
  padding: 2px 8px; border-radius: 20px;
}
.mb-diff-tag { font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 20px; }
.mb-reviewed-tag {
  font-size: 11px; font-weight: 600;
  background: rgba(34,197,94,0.12); color: #16A34A;
  padding: 2px 8px; border-radius: 20px;
}
.mb-time { font-size: 11px; color: #C4B5E8; flex-shrink: 0; }
.mb-question-text { font-size: 14px; font-weight: 600; color: #1F1040; line-height: 1.5; margin-bottom: 10px; }

/* ── 答案对比 ── */
.mb-answers { display: flex; flex-direction: column; gap: 4px; margin: 8px 0; }
.mb-answer {
  display: flex; align-items: baseline; gap: 6px; padding: 4px 10px; border-radius: 8px;
}
.mb-answer.wrong   { background: rgba(239,68,68,0.06); }
.mb-answer.correct { background: rgba(34,197,94,0.06); }
.mb-answer-label { font-size: 11px; color: #9CA3AF; font-weight: 600; white-space: nowrap; }
.mb-answer-value { font-size: 13px; font-weight: 600; line-height: 1.5; }
.mb-answer.wrong .mb-answer-value   { color: #DC2626; }
.mb-answer.correct .mb-answer-value { color: #16A34A; }

/* ── 完整选项展示 ── */
.mb-options-review { display: flex; flex-direction: column; gap: 4px; margin: 8px 0; }
.mb-opt {
  display: flex; align-items: baseline; gap: 8px; padding: 6px 10px;
  border-radius: 8px; background: rgba(0,0,0,0.02); font-size: 13px; line-height: 1.5;
}
.mb-opt-letter { font-weight: 700; color: #6B7280; min-width: 16px; }
.mb-opt-text { color: #374151; }
.mb-opt-correct { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.25); }
.mb-opt-correct .mb-opt-letter { color: #16A34A; }
.mb-opt-correct .mb-opt-text { color: #15803D; font-weight: 600; }
.mb-opt-wrong { background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.2); }
.mb-opt-wrong .mb-opt-letter { color: #DC2626; }
.mb-opt-wrong .mb-opt-text { color: #B91C1C; text-decoration: line-through; }

/* ── 冷却按钮 ── */
.mb-btn-cooldown {
  width: 100%; padding: 10px 16px; border-radius: 12px; border: none;
  background: rgba(156,163,175,0.15); color: #9CA3AF;
  font-size: 13px; font-weight: 600; cursor: not-allowed; font-family: inherit;
}

/* ── 操作按钮 ── */
.mb-actions { display: flex; gap: 8px; }
.mb-btn {
  padding: 8px 14px; border-radius: 12px; border: none;
  cursor: pointer; font-size: 13px; font-weight: 600;
  font-family: inherit; transition: all 0.15s ease;
}
.mb-btn:active { transform: scale(0.95); }
.mb-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.mb-btn-redo   { flex: 1; background: linear-gradient(140deg, rgba(196,184,255,0.55), rgba(167,139,250,0.45)); color: #5B21B6; border: 1px solid rgba(255,255,255,0.75); }
.mb-btn-remove { background: rgba(255,255,255,0.55); border: 1px solid rgba(255,255,255,0.80); color: #9CA3AF; }
.mb-btn-submit { flex: 1; background: linear-gradient(140deg, rgba(255,183,197,0.65), rgba(255,143,174,0.55)); color: #BE185D; border: 1px solid rgba(255,255,255,0.75); }
.mb-btn-cancel { background: rgba(255,255,255,0.55); border: 1px solid rgba(255,255,255,0.80); color: #9CA3AF; }
.mb-btn-close  { background: rgba(255,255,255,0.55); border: 1px solid rgba(255,255,255,0.80); color: #6B7280; }

/* ── 重做区域 ── */
.mb-redo-area { border-top: 1px solid rgba(167,139,250,0.12); padding-top: 12px; }
.mb-redo-title { font-size: 13px; font-weight: 700; color: #6B7280; margin-bottom: 10px; }
.mb-redo-options { display: flex; flex-direction: column; gap: 7px; margin-bottom: 10px; }
.mb-redo-option {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 12px;
  border: 1.5px solid rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.60);
  cursor: pointer; text-align: left; width: 100%;
  font-family: inherit; transition: all 0.15s ease;
}
.mb-redo-option:not(:disabled):hover { border-color: rgba(139,92,246,0.40); background: rgba(139,92,246,0.06); }
.mb-redo-option.selected  { border-color: rgba(139,92,246,0.45); background: rgba(139,92,246,0.08); }
.mb-redo-option.correct   { border-color: rgba(34,197,94,0.45); background: rgba(34,197,94,0.08); }
.mb-redo-option.wrong     { border-color: rgba(239,68,68,0.45); background: rgba(239,68,68,0.08); }
.mb-redo-option.disabled  { opacity: 0.5; }
.mb-redo-letter {
  width: 24px; height: 24px; border-radius: 8px;
  background: rgba(167,139,250,0.12);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800; color: #7C3AED; flex-shrink: 0;
  line-height: 24px; text-align: center;
}
.mb-redo-text { font-size: 13px; color: #374151; font-weight: 500; text-align: left; }
.mb-redo-feedback {
  padding: 10px 12px; border-radius: 12px;
  font-size: 13px; font-weight: 600; margin-bottom: 10px; line-height: 1.5;
}
.mb-redo-feedback.correct { background: rgba(34,197,94,0.10); border: 1px solid rgba(34,197,94,0.25); color: #16A34A; }
.mb-redo-feedback.wrong   { background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.20); color: #DC2626; }
.mb-redo-hint  { font-size: 12px; font-weight: 400; margin-top: 4px; opacity: 0.8; }
.mb-redo-actions   { display: flex; gap: 8px; }
.mb-redo-close-row { display: flex; gap: 8px; }

/* ── 空状态 ── */
.mb-empty {
  display: flex; flex-direction: column; align-items: center;
  padding: 60px 20px; text-align: center;
}
.mb-empty-icon  { margin-bottom: 16px; display: flex; justify-content: center; }
.mb-empty-title { font-size: 18px; font-weight: 700; color: #2D1B69; margin-bottom: 8px; }
.mb-empty-sub   { font-size: 14px; color: #9CA3AF; margin-bottom: 24px; }
.mb-empty-btn {
  padding: 12px 32px; border-radius: 20px; border: none;
  background: linear-gradient(140deg, #FFB7C5, #FF8FAE);
  color: #fff; font-size: 15px; font-weight: 700;
  cursor: pointer; font-family: inherit;
  box-shadow: 0 6px 20px rgba(255,143,171,0.30);
}

/* ── 已通过状态（灰色） ── */
.mb-card-cleared {
  opacity: 0.55;
  filter: grayscale(0.3);
}
.mb-card-cleared .mb-question-text { color: #9CA3AF; }

/* ── 连对进度标签 ── */
.mb-streak-tag {
  font-size: 11px; font-weight: 600; color: #7C3AED;
  background: rgba(124,58,237,0.08); border-radius: 8px; padding: 2px 8px;
}

/* ── 复测区域 ── */
.mb-review-area {
  margin-top: 12px; padding: 14px; border-radius: 14px;
  background: rgba(255,255,255,0.6); border: 1px solid rgba(124,58,237,0.12);
}
.mb-review-explain-title {
  font-size: 14px; font-weight: 700; color: #4B5563; margin-bottom: 8px;
}
.mb-review-explain-text {
  font-size: 13px; color: #6B7280; line-height: 1.7; margin-bottom: 10px;
  padding: 8px 10px; background: rgba(99,102,241,0.05); border-radius: 10px;
  border-left: 3px solid rgba(99,102,241,0.4);
}
.mb-review-explain-subtitle { font-size: 12px; font-weight: 600; color: #7C3AED; margin: 8px 0 4px; }
.mb-review-explain-points ul { margin: 0; padding-left: 18px; font-size: 12.5px; color: #4B5563; line-height: 1.8; }
.mb-review-quiz-header {
  font-size: 13px; font-weight: 700; color: #7C3AED; margin-bottom: 10px;
}

/* ── 错题解析文字 ── */
.mb-explain-text {
  font-size: 12.5px; color: #4B5563; line-height: 1.65; margin: 10px 0 0;
  padding: 8px 10px; background: rgba(99,102,241,0.05); border-radius: 10px;
  border-left: 3px solid rgba(99,102,241,0.4);
}

/* ── 复测独立页 ── */
.mb-review-page-body { padding: 16px 0; }
.mb-review-progress { font-size: 13px; font-weight: 600; color: #7C3AED; margin-bottom: 12px; }
.mb-review-empty { text-align: center; padding: 40px 0; color: #9CA3AF; }