.enriched-course,
.reading-passage {
  margin: 28px 0;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--academic-border);
  border-radius: var(--academic-radius);
  background: var(--academic-surface);
  box-shadow: var(--academic-shadow-small);
}

.enriched-section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.enriched-section-heading h2 {
  margin: 3px 0 0;
}

.enriched-section-heading > a,
.enriched-section-heading > span {
  flex: 0 0 auto;
  color: var(--academic-primary-dark);
  font-weight: 800;
}

.enriched-course-grid,
.reading-support-grid {
  display: grid;
  grid-template-columns:
    minmax(0, 1.7fr)
    minmax(250px, 0.8fr);
  gap: 24px;
}

.enriched-course-main > :first-child,
.enriched-course-summary > :first-child {
  margin-top: 0;
}

.enriched-course-summary {
  padding: 22px;
  border: 1px solid var(--academic-border);
  border-radius: var(--academic-radius-small);
  background: var(--academic-surface-soft);
}

.enriched-course-summary ul,
.lesson-checklist ul {
  margin-bottom: 0;
  padding-left: 21px;
}

.enriched-course-summary li,
.lesson-checklist li {
  margin: 9px 0;
  line-height: 1.55;
}

.enriched-note-grid,
.guided-example-grid,
.mistake-example-grid,
.reading-library-grid {
  display: grid;
  grid-template-columns:
    repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 20px 0 28px;
}

.enriched-note,
.guided-example,
.mistake-example,
.reading-library-card {
  padding: 19px;
  border: 1px solid var(--academic-border);
  border-radius: var(--academic-radius-small);
  background: var(--academic-surface-soft);
}

.enriched-note {
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: start;
  gap: 11px;
}

.enriched-note span {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--academic-primary-soft);
  color: var(--academic-primary-dark);
  font-weight: 900;
}

.enriched-note p,
.guided-example p,
.mistake-example p {
  margin: 0;
}

.guided-example {
  border-left: 4px solid var(--academic-primary);
}

.guided-example__sentence {
  margin-bottom: 9px !important;
  color: var(--academic-ink);
  font-size: 1.06rem;
  font-weight: 800;
}

.mistake-example__wrong {
  color: var(--academic-error);
}

.mistake-example__correct {
  margin: 8px 0 !important;
  color: var(--academic-success);
}

.lesson-takeaway,
.lesson-checklist {
  margin-top: 24px;
  padding: 20px 22px;
  border-radius: var(--academic-radius-small);
}

.lesson-takeaway {
  border-left: 5px solid var(--academic-primary);
  background: var(--academic-primary-soft);
}

.lesson-checklist {
  border: 1px solid var(--academic-border);
  background: #fffdf7;
}

.reading-audio-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding: 8px 18px;
  border: 2px solid var(--academic-primary);
  border-bottom: 4px solid var(--academic-primary-dark);
  border-radius: 999px;
  background: var(--academic-primary-soft);
  color: var(--academic-primary-dark);
  font: inherit;
  font-weight: 800;
  font-size: 0.9rem;
  cursor: pointer;
  transition: transform 90ms ease, border-bottom-width 90ms ease;
}

.reading-audio-button:hover {
  background: var(--academic-primary);
  color: white;
}

.reading-audio-button:active {
  transform: translateY(3px);
  border-bottom-width: 1px;
}

.reading-audio-button.is-playing {
  background: var(--academic-primary);
  color: white;
}

.reading-text {
  max-width: 78ch;
  margin: 0 auto 28px;
  padding: clamp(20px, 3vw, 34px);
  border-left: 5px solid var(--academic-primary);
  border-radius: 0 var(--academic-radius-small)
    var(--academic-radius-small) 0;
  background: var(--academic-surface-soft);
  color: var(--academic-ink);
  font-size: clamp(1.03rem, 1.3vw, 1.16rem);
  line-height: 1.82;
}

.reading-vocabulary,
.reading-observations,
.reading-questions,
.reading-key-point,
.reading-practice {
  padding: 21px;
  border: 1px solid var(--academic-border);
  border-radius: var(--academic-radius-small);
  background: white;
}

.reading-observations--full,
.reading-key-point,
.reading-practice {
  margin-top: 24px;
}

.reading-vocabulary dl {
  margin: 0;
}

.reading-vocabulary dl > div {
  display: grid;
  grid-template-columns: minmax(90px, 0.6fr) 1.4fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--academic-border);
}

.reading-vocabulary dl > div:last-child {
  border-bottom: 0;
}

.reading-vocabulary dt {
  color: var(--academic-primary-dark);
  font-weight: 850;
}

.reading-vocabulary dd {
  margin: 0;
}

.reading-vocabulary dd p {
  margin: 0 0 4px;
}

.reading-vocabulary small {
  color: var(--academic-ink-soft);
}

.reading-observations ol,
.reading-questions ol,
.reading-practice ol {
  padding-left: 22px;
}

.reading-observations li,
.reading-questions li,
.reading-practice li {
  margin-bottom: 18px;
}

.reading-observations blockquote {
  margin: 0 0 7px;
  padding: 10px 13px;
  border-left: 3px solid var(--academic-primary);
  background: var(--academic-primary-soft);
  font-weight: 700;
}

.reading-questions,
.reading-practice {
  margin-top: 24px;
}

.reading-questions details,
.reading-practice details {
  margin-top: 8px;
  padding: 10px 12px;
  border: 1px solid var(--academic-border);
  border-radius: 10px;
  background: var(--academic-surface-soft);
}

.reading-questions summary,
.reading-practice summary {
  color: var(--academic-primary-dark);
  font-weight: 800;
  cursor: pointer;
}

.reading-key-point {
  border-left: 5px solid var(--academic-primary);
  background: var(--academic-primary-soft);
}

.reading-filter {
  max-width: 420px;
  margin: 24px 0;
}

.reading-filter label {
  display: block;
  margin-bottom: 7px;
  font-weight: 800;
}

.reading-filter select {
  width: 100%;
  padding: 12px 13px;
  border: 1px solid var(--academic-border-strong);
  border-radius: 10px;
  background: white;
  color: var(--academic-ink);
}

.reading-library-card {
  display: flex;
  flex-direction: column;
}

.reading-library-card h2 {
  margin: 14px 0 6px;
}

.reading-library-card .button {
  align-self: flex-start;
  margin-top: auto;
}

.reading-library-card__meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--academic-primary-dark);
  font-size: 0.84rem;
  font-weight: 850;
}

@media (max-width: 760px) {
  .enriched-course-grid,
  .reading-support-grid {
    grid-template-columns: 1fr;
  }

  .enriched-section-heading {
    flex-direction: column;
  }

  .reading-vocabulary dl > div {
    grid-template-columns: 1fr;
  }
}