.figure-image-wrap {
  padding: 16px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.summary-chip {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}

.summary-chip strong {
  display: block;
  margin-top: 6px;
  font-size: 1.08rem;
}

.mistake-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.figure-reading-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.related-topic-card {
  display: block;
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.related-topic-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.08);
}

@media (max-width: 980px) {
  .summary-grid,
  .mistake-grid,
  .figure-reading-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .summary-grid,
  .mistake-grid,
  .figure-reading-grid {
    grid-template-columns: 1fr;
  }
}

.section-intro-block {
  display: grid;
  gap: 8px;
}

.section-support-text {
  max-width: 72ch;
  color: var(--muted);
}

.alt-card,
.reference-card {
  height: auto;
}

.alt-grid > .alt-card,
.reference-grid > .reference-card {
  height: 100%;
}

.alt-card h3,
.reference-card h3 {
  margin-bottom: 8px;
}

.reference-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.reference-card {
  padding: 20px 22px;
}

.section-stack > .reference-card {
  align-self: start;
}

.reference-group-label {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  margin: 0 0 12px;
}

.reference-list {
  margin: 0;
  padding-left: 18px;
}

.reference-list li + li {
  margin-top: 0.7rem;
}

.reference-list a {
  text-decoration: underline;
  text-underline-offset: 0.18em;
  text-decoration-color: rgba(47, 103, 216, 0.28);
}

.reference-list a[target="_blank"]::after {
  content: " ↗";
  font-size: 0.92em;
}

.reference-note {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 980px) {
  .reference-grid {
    grid-template-columns: 1fr;
  }
}