.quiz-suggestion-group {
  padding: 0;
  overflow: hidden;
}

.quiz-suggestion-group > summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.quiz-suggestion-group > summary::-webkit-details-marker { display: none; }
.quiz-suggestion-group > summary::before {
  content: "+";
  display: inline-grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--accent);
  font-weight: 700;
}
.quiz-suggestion-group[open] > summary::before { content: "−"; }
.quiz-suggestion-title { flex: 1 1 240px; font-weight: 700; }
.quiz-suggestion-meta { flex: 1 1 220px; color: var(--muted2); font-size: 12px; }
.quiz-suggestion-toggle { color: var(--accent); font-size: 12px; font-weight: 700; }
.quiz-collapse-label, .quiz-suggestion-group[open] .quiz-expand-label { display: none; }
.quiz-suggestion-group[open] .quiz-collapse-label { display: inline; }
.quiz-suggestion-content { padding: 0 18px 18px; }
.quiz-suggestion-content .ac-problem-list { margin: 0; }