.case-hero {
  padding: clamp(2.6rem, 6vw, 5.2rem) 0 2.8rem;
  background: #eef5f4;
  border-bottom: 1px solid var(--color-border);
}

.case-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(17rem, 0.8fr);
  gap: 2rem;
  align-items: start;
}

.case-boundary {
  padding: 1.35rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.case-boundary h2,
.source-card h3,
.study-case h3 {
  margin-top: 0;
}

.case-main {
  display: grid;
  gap: 3rem;
  padding-top: 2.8rem;
  padding-bottom: 4rem;
}

.case-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.case-metrics article {
  padding: 1.2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.case-metrics strong {
  display: block;
  color: var(--color-primary);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
}

.case-metrics span {
  color: var(--color-muted);
}

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

.source-card,
.study-case {
  min-width: 0;
  max-width: 100%;
  padding: 1.35rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.source-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.source-card h3,
.source-card p,
.source-card dl,
.source-card details {
  margin-top: 0;
  margin-bottom: 0;
}

.source-card__citation {
  color: var(--color-muted);
  font-size: 0.94rem;
  line-height: 1.55;
}

.source-card__overview {
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  background: var(--color-surface-soft);
}

.source-card__overview h4 {
  margin: 0 0 0.75rem;
}

.source-card__overview dl {
  display: grid;
  gap: 0.8rem;
}

.source-card__overview dt {
  margin-bottom: 0.2rem;
  color: var(--color-primary);
  font-weight: 700;
}

.source-card__overview dd {
  margin: 0;
  line-height: 1.7;
}

.source-card__basis {
  margin-top: 0.8rem !important;
  color: var(--color-muted);
  font-size: 0.88rem;
}

.source-card__validation {
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.source-card__validation summary {
  color: var(--color-primary);
  cursor: pointer;
  font-weight: 700;
}

.source-card__validation[open] summary {
  margin-bottom: 0.75rem;
}

.source-card__validation p + p {
  margin-top: 0.65rem;
}

.source-card__actions {
  margin-top: auto;
}

.source-card code {
  overflow-wrap: anywhere;
  word-break: break-word;
  font-size: 0.82rem;
}

.case-filters {
  display: grid;
  grid-template-columns: minmax(15rem, 2fr) repeat(3, minmax(9rem, 1fr));
  gap: 0.9rem;
}

.case-filter-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin: 1rem 0;
}

.case-list {
  display: grid;
  min-width: 0;
  gap: 1rem;
}

.study-case__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.study-case__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  margin: 0.9rem 0;
  color: var(--color-muted);
}

.study-case__grid {
  display: grid;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.evidence-block {
  min-width: 0;
  padding: 1rem;
  border-radius: var(--radius-md);
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
}

.study-case p,
.study-case li,
.study-case code,
.evidence-block {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.evidence-block--source {
  border-left: 4px solid var(--color-primary);
}

.evidence-block--interpretation {
  border-left: 4px solid var(--color-accent);
}

.evidence-block h4 {
  margin: 0 0 0.5rem;
}

.incidence-wrap {
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  margin: 1rem 0;
}

.incidence-table {
  width: 100%;
  min-width: 36rem;
  border-collapse: collapse;
}

.incidence-table th,
.incidence-table td {
  padding: 0.65rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.study-case details {
  margin-top: 1rem;
}

.trace-list {
  margin-bottom: 0;
}

.image-gate {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  overflow-wrap: anywhere;
  word-break: break-word;
  border-radius: var(--radius-md);
  background: #fff8ee;
  border: 1px solid #e8d5ba;
}

.case-chain { min-width: 0; max-width: 100%; margin: 1.2rem 0; padding: 1rem; overflow: hidden; border: 1px solid var(--color-line); border-radius: var(--radius-lg); background: #fbfcfc; }
.case-chain__rail { display: grid; min-width: 0; max-width: 100%; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .45rem; margin-bottom: 1rem; }
.case-chain__rail span { padding: .55rem; border-radius: var(--radius-sm); background: var(--color-primary-soft); color: var(--color-primary-dark); text-align: center; font-weight: 800; }
.case-chain__rail span::after { float: right; content: "→"; }
.case-chain__rail span:last-child::after { content: ""; }
.case-chain__facts { padding: .9rem; border-left: 4px solid var(--color-primary); background: #fff; }
.case-chain__facts h4 { margin-top: 0; }
.case-chain__choices { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; margin: 1rem 0; }
.case-chain__choice { display: grid; min-width: 0; gap: .4rem; font-weight: 750; }
.case-chain__choice select, .case-chain__choice textarea { width: 100%; padding: .65rem; border: 1px solid var(--color-line-strong); border-radius: var(--radius-sm); background: #fff; color: var(--color-ink); }
.case-chain__choice:last-child { grid-column: 1 / -1; }
.case-chain__source { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--color-line); }
.case-chain__source-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
.case-chain__source-grid section { padding: .85rem; border: 1px solid var(--color-line); border-radius: var(--radius-md); background: #fff; }
.case-chain__source-grid h5 { margin: 0 0 .35rem; font-size: 1rem; }
.case-chain__status { color: var(--color-ink-soft); }

@media (max-width: 960px) {
  .case-hero__grid,
  .study-case__grid,
  .case-chain__source-grid {
    grid-template-columns: 1fr;
  }

  .case-metrics,
  .case-filters {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .case-metrics,
  .source-grid,
  .case-filters,
  .case-chain__choices {
    grid-template-columns: 1fr;
  }

  .case-chain__rail { grid-template-columns: repeat(2, minmax(0, 1fr)); overflow: visible; }
  .case-chain__rail span { min-width: 0; }

  .incidence-table {
    min-width: 0;
    table-layout: fixed;
    font-size: 0.8rem;
  }

  .incidence-table th,
  .incidence-table td {
    padding: 0.4rem 0.25rem;
    overflow-wrap: anywhere;
    word-break: break-word;
  }

  .study-case__header,
  .case-filter-meta {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .case-chain__rail { grid-template-columns: 1fr; }
}