.course-quiz {
  border-top: 2px solid var(--border);
  margin-top: 3rem;
  padding-top: 1.5rem;
}

.course-quiz-header {
  align-items: flex-start;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
}

.course-quiz-header h2 {
  margin-top: 0;
}

.course-quiz-header p {
  color: var(--muted-text);
  margin: 0.25rem 0 0;
}

.course-quiz-reset {
  appearance: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  flex: 0 0 auto;
  font: inherit;
  padding: 0.45rem 0.7rem;
}

.course-quiz-reset:hover,
.course-quiz-reset:focus-visible {
  border-color: var(--link);
}

.course-quiz-reset:focus-visible,
.course-quiz-option:has(input:focus-visible) {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

.course-quiz-questions {
  display: grid;
  gap: 1rem;
  margin-top: 1.25rem;
}

.course-quiz-question {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 0;
  padding: 1rem;
}

.course-quiz-question legend {
  color: var(--text);
  font-weight: 600;
  padding: 0 0.25rem;
}

.course-quiz-number {
  color: var(--muted-text);
}

.course-quiz-options {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.75rem;
}

.course-quiz-option {
  align-items: flex-start;
  background: var(--page-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  gap: 0.65rem;
  padding: 0.7rem 0.8rem;
}

.course-quiz-option:hover {
  border-color: var(--link);
}

.course-quiz-option input {
  flex: 0 0 auto;
  margin-top: 0.2rem;
}

.course-quiz-option.selected {
  border-width: 2px;
  padding: calc(0.7rem - 1px) calc(0.8rem - 1px);
}

.course-quiz-option.correct {
  border-color: #1a7f37;
}

html[data-theme="dark"] .course-quiz-option.correct {
  border-color: #3fb950;
}

.course-quiz-option.incorrect {
  border-color: var(--danger);
}

.course-quiz-feedback {
  border-left: 3px solid transparent;
  color: var(--muted-text);
  margin-top: 0.75rem;
  min-height: 1.4em;
  padding-left: 0.75rem;
}

.course-quiz-feedback.correct {
  border-left-color: #1a7f37;
  color: var(--text);
}

html[data-theme="dark"] .course-quiz-feedback.correct {
  border-left-color: #3fb950;
}

.course-quiz-feedback.incorrect {
  border-left-color: var(--danger);
  color: var(--text);
}

@media screen and (max-width: 600px) {
  .course-quiz-header {
    align-items: stretch;
    flex-direction: column;
  }

  .course-quiz-reset {
    width: 100%;
  }

  .course-quiz-question {
    padding: 0.85rem;
  }
}