.classic-case-page {
  --case-ink: #20352b;
  --case-muted: #53655b;
  --case-line: #cedbd3;
  --case-paper: #f4f7f4;
  --case-red: #842c28;
  --case-gold: #b58b45;
}

.classic-case-page .case-hero {
  background: #eef4f0;
  border-bottom: 1px solid var(--case-line);
}

.classic-case-page .case-hero .section-inner {
  padding: 64px 0 58px;
}

.classic-case-page .case-hero h1 {
  max-width: 14em;
  margin: 0 0 18px;
}

.classic-case-page .case-hero p {
  max-width: 860px;
}

.classic-case-page .case-mission {
  margin-top: 24px;
  padding-left: 18px;
  border-left: 3px solid var(--case-gold);
  color: #315547;
  font-weight: 600;
}

.case-hero-actions,
.case-study-footer,
.case-actions,
.case-anchor-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.case-hero-actions {
  margin-top: 24px;
}

.case-anchor-wrap {
  position: sticky;
  top: 72px;
  z-index: 5;
  border-bottom: 1px solid var(--case-line);
  background: rgba(255, 255, 255, .96);
}

.case-anchor-nav {
  padding: 12px 0;
}

.case-anchor-nav a,
.case-study-footer a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border: 1px solid #b7c9be;
  color: #315d4a;
  text-decoration: none;
  background: #fff;
}

.case-anchor-nav a:hover,
.case-study-footer a:hover {
  color: var(--case-red);
  border-color: #a47a50;
}

.case-section {
  border-bottom: 1px solid var(--case-line);
}

.case-section > .section-inner,
.case-studies-section > .section-inner {
  padding: 58px 0;
}

.case-section-heading {
  max-width: 880px;
  margin-bottom: 28px;
}

.case-section-heading h2 {
  margin-bottom: 12px;
}

.case-domain-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 30px;
  border-top: 1px solid var(--case-line);
}

.case-domain-card {
  min-width: 0;
  padding: 24px 0 28px;
  border-bottom: 1px solid var(--case-line);
}

.case-domain-card h3 {
  margin: 0 0 8px;
}

.case-domain-card p {
  margin: 10px 0;
}

.case-domain-card a {
  display: inline-block;
  margin-top: 6px;
  color: var(--case-red);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.case-status,
.synthetic-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 3px 9px;
  border: 1px solid #c6a66c;
  color: #6a4a1e;
  background: #fff8e8;
  font-size: 13px;
  line-height: 1.4;
}

.case-domain-card.is-ready .case-status {
  color: #315d4a;
  border-color: #9ab9a8;
  background: #eef7f0;
}

.case-needed {
  color: var(--case-muted);
  font-size: 14px;
}

.case-sources {
  background: #fbfcfb;
}

.table-scroll {
  overflow-x: auto;
  max-width: 100%;
}

.case-sources table,
.case-input-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
  background: #fff;
}

.case-sources th,
.case-sources td,
.case-input-table th,
.case-input-table td {
  padding: 13px 14px;
  border: 1px solid var(--case-line);
  vertical-align: top;
  text-align: left;
  line-height: 1.75;
}

.case-sources th,
.case-input-table th {
  background: #edf4ef;
  color: #315547;
  font-weight: 700;
}

.case-sources th {
  white-space: nowrap;
}

.case-template {
  background: #f3f6f4;
}

.case-template-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--case-line);
  border-left: 1px solid var(--case-line);
}

.case-template-grid li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  min-width: 0;
  padding: 20px;
  border-right: 1px solid var(--case-line);
  border-bottom: 1px solid var(--case-line);
  background: #fff;
}

.case-template-grid li > span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: #fff;
  background: var(--case-red);
  font-weight: 700;
}

.case-template-grid h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.case-template-grid p {
  margin: 0;
  color: var(--case-muted);
  font-size: 14px;
}

.case-note {
  margin: 24px 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--case-gold);
  background: #fffdf6;
}

.case-studies-section {
  background: #fff;
}

.case-study {
  margin-top: 42px;
  border: 1px solid #c7d5cc;
  background: #fff;
  scroll-margin-top: 136px;
}

.case-study-heading {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  border-bottom: 1px solid var(--case-line);
  background: #f8faf8;
}

.case-study-heading h2 {
  margin: 0 0 7px;
  max-width: 28em;
}

.case-study-heading p {
  margin: 0;
  color: var(--case-muted);
}

.case-actions {
  justify-content: flex-end;
  align-items: flex-start;
}

.case-actions button,
.case-chain-control {
  min-height: 40px;
  border: 1px solid #a9c0b1;
  padding: 7px 12px;
  color: #315d4a;
  background: #fff;
  cursor: pointer;
  font: inherit;
}

.case-actions button:hover,
.case-chain-control:hover {
  color: var(--case-red);
  border-color: #a47a50;
}

.case-local-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0 18px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--case-line);
  background: #fbfcfb;
}

.case-local-nav a {
  padding: 6px 0;
  color: #315d4a;
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.case-block {
  max-width: 980px;
  margin: 0 auto;
  padding: 30px 28px;
  border-bottom: 1px solid #e0e8e2;
}

.case-block h3 {
  margin: 0 0 14px;
  color: #254d3b;
}

.case-block p {
  margin: 0 0 12px;
}

.case-block ul {
  margin: 0;
  padding-left: 1.4em;
}

.case-block li {
  margin: 9px 0;
}

.case-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 26px;
  margin: 0;
}

.case-meta-grid > div {
  padding: 12px 0;
  border-top: 1px solid var(--case-line);
}

.case-meta-grid dt {
  color: #567060;
  font-size: 13px;
  font-weight: 700;
}

.case-meta-grid dd {
  margin: 4px 0 0;
  overflow-wrap: anywhere;
}

.case-source-block {
  background: #fffdf8;
}

.source-label,
.translation-label {
  display: inline-block;
  margin: 4px 0 10px;
  padding: 4px 8px;
  color: #fff;
  background: #7f3932;
  font-size: 13px;
  font-weight: 700;
}

.translation-label {
  background: #367061;
}

.case-warning {
  margin-top: 16px !important;
  padding: 13px 15px;
  color: #6a4a1e;
  background: #fff8e8;
  border: 1px solid #ead9ad;
}

.case-diagram {
  margin: 0;
  padding: 22px;
  border: 1px solid #b8cfc0;
  background: #eef5f0;
}

.case-diagram-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  align-items: stretch;
}

.case-diagram-track > i {
  display: grid;
  place-items: center;
  color: #927233;
  font-style: normal;
  font-size: 22px;
}

.case-diagram-step {
  min-width: 0;
  padding: 16px;
  border: 1px solid #b8cfc0;
  background: #fff;
  transition: border-color .25s ease, background-color .25s ease, transform .25s ease;
}

.case-diagram-step span {
  display: block;
  color: #8b322d;
  font-size: 13px;
  font-weight: 800;
}

.case-diagram-step strong {
  display: block;
  margin-top: 6px;
  color: #245442;
}

.case-diagram-step p {
  margin: 6px 0 0;
  color: var(--case-muted);
  font-size: 14px;
  line-height: 1.7;
}

.case-diagram-step.is-active {
  border-color: #8b322d;
  background: #fff7ed;
  transform: translateY(-3px);
}

.case-diagram figcaption {
  margin-top: 16px;
  color: var(--case-muted);
  font-size: 14px;
  line-height: 1.8;
}

.case-diagram figcaption span {
  margin-left: 10px;
}

.reasoning-grid,
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.reasoning-grid article,
.evidence-grid > div {
  min-width: 0;
  padding: 18px;
  border-top: 3px solid #4a7e68;
  background: #f4f8f5;
}

.reasoning-grid article > span {
  color: #8b322d;
  font-weight: 800;
}

.reasoning-grid h4 {
  margin: 7px 0;
  color: #254d3b;
}

.reasoning-grid p,
.evidence-grid p {
  margin: 0;
  color: var(--case-muted);
  font-size: 15px;
}

.evidence-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.evidence-grid > div:nth-child(1) {
  border-color: #367061;
}

.evidence-grid > div:nth-child(2) {
  border-color: #b58b45;
}

.evidence-grid > div:nth-child(3) {
  border-color: #8b322d;
}

.evidence-grid strong {
  color: #254d3b;
}

.case-boundary {
  background: #fff8e8;
}

.case-boundary h3 {
  color: #6a4a1e;
}

.exercise-block {
  background: #f5f7f5;
}

.exercise-block details {
  margin-top: 16px;
  border-top: 1px solid var(--case-line);
}

.exercise-block summary {
  padding: 14px 0;
  color: #315d4a;
  font-weight: 700;
  cursor: pointer;
}

.case-study-footer {
  padding: 22px 28px;
  background: #fbfcfb;
}

.case-next {
  background: #f3f6f4;
}

.case-next ol {
  padding-left: 1.4em;
}

.case-next a {
  display: inline-block;
  margin: 8px 22px 0 0;
  color: var(--case-red);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.pending-cases {
  background: #fbfcfb;
}

.pending-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0 24px;
  border-top: 1px solid var(--case-line);
}

.pending-list article {
  padding: 18px 0;
  border-bottom: 1px solid var(--case-line);
}

.pending-list strong {
  color: #315547;
}

.pending-list p {
  margin: 8px 0;
  color: var(--case-muted);
  font-size: 14px;
}

.pending-list span {
  color: #8a5f25;
  font-size: 13px;
}

@media (max-width: 980px) {
  .case-domain-grid,
  .case-template-grid,
  .pending-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-anchor-wrap {
    top: 0;
  }
}

@media (max-width: 680px) {
  .classic-case-page .case-hero .section-inner {
    padding: 38px 0 34px;
  }

  .case-anchor-wrap {
    position: static;
  }

  .case-anchor-nav {
    gap: 6px;
    overflow-x: auto;
    flex-wrap: nowrap;
  }

  .case-anchor-nav a {
    flex: 0 0 auto;
    min-height: 38px;
    font-size: 13px;
  }

  .case-domain-grid,
  .case-template-grid,
  .pending-list,
  .case-meta-grid,
  .reasoning-grid,
  .evidence-grid {
    grid-template-columns: 1fr;
  }

  .case-study-heading {
    display: block;
    padding: 22px 18px;
  }

  .case-actions {
    justify-content: flex-start;
    margin-top: 16px;
  }

  .case-local-nav {
    padding: 12px 18px;
  }

  .case-block {
    padding: 24px 18px;
  }

  .case-diagram {
    padding: 14px;
  }

  .case-diagram-track {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .case-diagram-track > i {
    height: 16px;
    transform: rotate(90deg);
  }

  .case-diagram-step {
    padding: 13px;
  }

  .case-diagram figcaption span {
    display: block;
    margin: 8px 0 0;
  }

  .case-study-footer {
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .case-diagram-step {
    transition: none;
  }
}