/* random-quiz.css — 随机出题页面样式（套题随机出题 / 敏捷随机出题共用） */

.random-quiz-container {
  max-width: 820px;
  margin: 24px auto;
  padding: 0 16px;
}

/* ---- 页头 ---- */
.rq-header {
  text-align: center;
  margin-bottom: 18px;
}

.rq-title {
  font-size: 26px;
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--text, #111827);
}

.rq-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted, #6b7280);
  margin: 0;
}

.rq-warn {
  margin: 14px 0 4px;
  padding: 14px 18px;
  font-size: 20px;
  font-weight: 900;
  color: #fff;
  text-align: center;
  line-height: 1.6;
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  border: 3px solid #7f1d1d;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(220, 38, 38, 0.4);
}

/* ---- 抽题范围筛选 chips ---- */
.rq-filter-bar {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding: 14px 16px;
  background: var(--card-bg, #fff);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 14px;
}

.rq-filter-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted, #6b7280);
  padding: 6px 0;
  flex-shrink: 0;
}

.rq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.rq-chip {
  border: 1.5px solid var(--border-color, #e5e7eb);
  background: transparent;
  color: var(--text, #374151);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.rq-chip:hover {
  border-color: #2563eb;
  color: #2563eb;
}

.rq-chip.active {
  background: #2563eb;
  border-color: #2563eb;
  color: #fff;
}

.rq-chip.active .rq-chip-count {
  background: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.rq-chip-count {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
  border-radius: 999px;
  padding: 1px 7px;
  margin-left: 2px;
}

.rq-card {
  background: var(--card-bg, #fff);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

.rq-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.rq-meta {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted, #6b7280);
}

.rq-source {
  background: rgba(124, 58, 237, 0.1);
  color: #7c3aed;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}

.rq-count {
  font-variant-numeric: tabular-nums;
}

.rq-tag {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  background: #2563eb;
  color: #fff;
}

/* 每题倒计时：仅作提示，不锁定作答 */
.rq-timer {
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.1);
  color: #2563eb;
  border: 1px solid rgba(37, 99, 235, 0.25);
  white-space: nowrap;
}

.rq-timer.urgent {
  background: rgba(245, 158, 11, 0.15);
  color: #d97706;
  border-color: rgba(245, 158, 11, 0.4);
}

.rq-timer.timeout {
  background: rgba(220, 38, 38, 0.12);
  color: #dc2626;
  border-color: rgba(220, 38, 38, 0.4);
}

.rq-stem {
  font-size: 17px;
  line-height: 1.7;
  font-weight: 600;
  color: var(--text, #111827);
  margin-bottom: 20px;
}

.rq-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rq-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 1.5px solid var(--border-color, #e5e7eb);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.rq-option:hover {
  border-color: #2563eb;
  background: rgba(37, 99, 235, 0.04);
}

.rq-option.selected {
  border-color: #2563eb;
  background: rgba(37, 99, 235, 0.08);
}

.rq-option input {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  accent-color: #2563eb;
  flex-shrink: 0;
}

.rq-option-key {
  font-weight: 700;
  color: #2563eb;
  flex-shrink: 0;
}

.rq-option-text {
  line-height: 1.6;
}

.rq-option.is-correct {
  border-color: #16a34a;
  background: rgba(22, 163, 74, 0.1);
}

.rq-option.is-wrong {
  border-color: #dc2626;
  background: rgba(220, 38, 38, 0.1);
}

.rq-actions {
  display: flex;
  gap: 12px;
  margin-top: 22px;
}

.rq-actions .btn {
  padding: 11px 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: #2563eb;
  color: #fff;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-outline {
  background: transparent;
  border: 1.5px solid #2563eb !important;
  color: #2563eb;
}

.rq-result-wrap {
  margin-top: 22px;
}

.rq-result {
  border-radius: 14px;
  padding: 18px 20px;
  border: 1px solid var(--border-color, #e5e7eb);
}

.rq-result.correct {
  background: rgba(22, 163, 74, 0.06);
  border-color: rgba(22, 163, 74, 0.3);
}

.rq-result.wrong {
  background: rgba(220, 38, 38, 0.05);
  border-color: rgba(220, 38, 38, 0.3);
}

.rq-result-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.rq-badge {
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 14px;
}

.rq-badge.ok { background: #16a34a; color: #fff; }
.rq-badge.no { background: #dc2626; color: #fff; }

.rq-your {
  font-size: 13px;
  color: var(--muted, #6b7280);
}

.rq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.rq-cell {
  background: var(--card-bg, #fff);
  border: 1px solid var(--border-color, #e5e7eb);
  border-radius: 10px;
  padding: 12px 14px;
}

.rq-cell-answer {
  grid-column: 1 / -1;
}

.rq-cell-label {
  font-size: 12px;
  color: var(--muted, #6b7280);
  margin-bottom: 6px;
  font-weight: 600;
}

.rq-cell-value {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}

.rq-block {
  margin-top: 14px;
  border-radius: 10px;
  padding: 14px 16px;
}

.rq-confusion {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.rq-solution {
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.rq-block-title {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 10px;
  color: var(--text, #111827);
}

.rq-confusion-list {
  margin: 0;
  padding-left: 20px;
}

.rq-confusion-fallback {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text, #111827);
}

.rq-confusion-fallback b {
  color: #dc2626;
  background: rgba(220, 38, 38, 0.08);
  padding: 1px 6px;
  border-radius: 4px;
}

.rq-confusion-list li {
  line-height: 1.8;
  margin-bottom: 4px;
}

.rq-solution-text {
  line-height: 1.8;
  margin: 0;
  color: var(--text, #111827);
}

.rq-muted {
  color: var(--muted, #9ca3af);
  font-size: 14px;
}

.rq-empty {
  text-align: center;
  color: var(--muted, #6b7280);
  padding: 40px;
}

@media (max-width: 600px) {
  .rq-grid { grid-template-columns: 1fr; }
  .rq-stem { font-size: 16px; }
  .rq-card { padding: 18px; }
}