.reading-expansion {
  grid-column: 1/-1;
  clear: both;
  margin: 48px 0;
  color: var(--ink);
}
.reading-expansion .expansion-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 24px;
  border-top: 2px solid var(--accent);
  padding-top: 22px;
}
.reading-expansion .expansion-heading h2 {
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.35;
  margin: 8px 0;
}
.reading-expansion .expansion-heading p {
  color: var(--muted);
  max-width: 720px;
  margin: 0;
  line-height: 1.8;
}
.reading-expansion .expansion-kicker {
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.reading-expansion .expansion-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.reading-expansion .expansion-card {
  background: var(--paper);
  border: 1px solid var(--line);
  min-width: 0;
  overflow: hidden;
  border-radius: 10px;
}
.reading-expansion .expansion-card figure {
  margin: 0;
  height: 170px;
  background: var(--tint);
}
.reading-expansion .expansion-card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: right bottom;
}
.reading-expansion .expansion-copy {
  padding: 20px;
}
.reading-expansion .expansion-category {
  font-size: 12px;
  color: var(--accent);
  margin: 0 0 10px;
}
.reading-expansion .expansion-copy h3 {
  font-size: 18px;
  line-height: 1.6;
  margin: 0 0 12px;
}
.reading-expansion .expansion-copy p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
  margin: 0 0 16px;
}
.reading-expansion .expansion-points {
  padding-left: 18px;
  margin: 12px 0 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}
.reading-expansion .expansion-points li {
  margin: 6px 0;
}
.reading-expansion .expansion-link {
  font-size: 13px;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.reading-expansion.layout-1 .expansion-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.reading-expansion.layout-2 .expansion-card:first-child {
  grid-column: span 2;
}
.reading-expansion.layout-3 .expansion-card {
  border-radius: 0;
  border-top: 3px solid var(--accent);
}
.reading-expansion .route-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.reading-expansion .route-card {
  border-left: 3px solid var(--accent);
  background: var(--tint);
  padding: 23px;
  min-width: 0;
}
.reading-expansion .route-card h3 {
  font-size: 20px;
  margin: 8px 0 14px;
  line-height: 1.4;
}
.reading-expansion .route-card p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
}
.reading-expansion .route-card ul {
  padding-left: 18px;
  line-height: 1.9;
  font-size: 13px;
}
@media (max-width: 900px) {
  .reading-expansion .expansion-grid,
  .reading-expansion .route-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .reading-expansion.layout-2 .expansion-card:first-child {
    grid-column: span 1;
  }
}
@media (max-width: 600px) {
  .reading-expansion {
    margin: 34px 0;
  }
  .reading-expansion .expansion-heading {
    align-items: start;
    flex-direction: column;
    gap: 12px;
  }
  .reading-expansion .expansion-grid,
  .reading-expansion.layout-1 .expansion-grid,
  .reading-expansion .route-grid {
    grid-template-columns: 1fr;
  }
  .reading-expansion .expansion-card figure {
    height: 190px;
  }
}