:root {
  --detail-measure: 760px;
  --page-width: var(--max);
}
.detail-main {
  background: var(--canvas);
}
.context-bar {
  position: sticky;
  top: 68px;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 245, 240, .97);
  backdrop-filter: blur(12px);
}
.context-bar-inner {
  display: flex;
  width: min(var(--page-width), calc(100% - (var(--gutter) * 2)));
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto;
}
.context-bar ol { display: flex; flex-wrap: wrap; align-items: center; gap: 0; color: var(--muted); font-size: .78rem; }
.context-bar li + li::before { content: "/"; margin: 0 10px; color: var(--line); }
.context-bar li[aria-current="page"] { color: var(--ink); font-weight: 750; }
.context-bar a { text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 4px; }
.context-bar a:hover { text-decoration-color: currentColor; }
.context-bar p { color: var(--muted); font: 700 .68rem var(--mono); letter-spacing: .06em; white-space: nowrap; }
.context-bar p span { margin-right: 10px; color: var(--accent-dark); }
.context-bar .context-state-capability span { color: var(--navy); }
.detail-hero {
  padding: 64px 0 80px;
}
.detail-hero-inner,
.detail-section-inner,
.related-inner {
  width: min(var(--page-width), calc(100% - (var(--gutter) * 2)));
  margin: 0 auto;
}
.detail-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}
.detail-title {
  max-width: 900px;
  margin: 20px 0 24px;
  font-size: clamp(2.7rem, 5.4vw, 5.2rem);
  line-height: 1.05;
  letter-spacing: -0.055em;
}
.detail-summary {
  max-width: 680px;
  margin: 0;
  color: var(--text);
  font-size: clamp(1.02rem, 1.45vw, 1.2rem);
  line-height: 1.75;
}
.detail-contract {
  border-top: 3px solid var(--ink);
  background: var(--surface);
  padding: 28px;
}
.detail-contract.future-contract {
  border-top-color: var(--navy);
  border-right: 1px dashed var(--navy);
  border-bottom: 1px dashed var(--navy);
  border-left: 1px dashed var(--navy);
}
.detail-contract.capability-contract {
  border: 1px solid var(--navy);
  border-top: 4px solid var(--navy);
  background: #f7fafc;
}
.detail-contract h2 {
  margin: 0 0 18px;
  font-size: 1rem;
}
.detail-contract dl {
  display: grid;
  gap: 14px;
  margin: 0;
}
.detail-contract div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.detail-contract dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}
.detail-contract dd {
  margin: 0;
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.65;
}
.detail-section {
  padding: 88px 0;
  border-top: 1px solid var(--line);
}
.detail-section.is-white {
  background: var(--surface);
}
.detail-section.is-soft {
  background: var(--soft-fill);
}
.detail-section.is-dark {
  background: var(--ink);
  color: var(--surface);
}
.detail-section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(320px, .72fr);
  gap: clamp(40px, 5vw, 72px);
  align-items: start;
  margin-bottom: 48px;
}
.detail-section-head h2 {
  margin: 10px 0 0;
  max-width: 760px;
  font-size: clamp(2rem, 3.15vw, 3.1rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
}
.detail-section-head p {
  max-width: var(--detail-measure);
  margin: 0;
  padding-top: 46px;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.8;
}
.is-dark .detail-section-head p {
  color: #d8dde2;
}
.step-grid,
.info-grid {
  display: grid;
  grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.step-card,
.info-card {
  min-height: 220px;
  padding: 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.step-card strong,
.info-card strong {
  display: block;
  margin-bottom: 24px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}
.step-card h3,
.info-card h3,
.future-card h3 {
  margin: 0 0 14px;
  font-size: 1.18rem;
}
.step-card p,
.info-card p,
.future-card p {
  margin: 0;
  color: var(--text);
  font-size: 0.91rem;
  line-height: 1.75;
}
.human-gate {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 24px;
  align-items: center;
  margin: 22px 0;
  padding: 22px 26px;
  border: 2px solid var(--accent);
  background: #fff7f2;
}
.human-gate strong {
  color: var(--accent-dark);
  font-size: 0.84rem;
}
.human-gate p {
  margin: 0;
  color: var(--ink);
  line-height: 1.7;
}
.split-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
}
.split-panel > article {
  padding: clamp(28px, 5vw, 56px);
}
.split-panel > article + article {
  border-left: 1px solid var(--line);
}
.split-panel h3 {
  margin: 14px 0 18px;
  font-size: clamp(1.4rem, 2vw, 2rem);
}
.split-panel p,
.split-panel li {
  color: var(--text);
  line-height: 1.8;
}
.current-side {
  background: var(--surface);
  border-top: 4px solid var(--accent);
}
.future-side {
  background: #f7fafc;
  border-top: 4px solid var(--navy);
  outline: 1px dashed var(--navy);
  outline-offset: -10px;
}
.capability-side {
  background: #f7fafc;
  border-top: 4px solid var(--navy);
}
.sage-side {
  background: #f4f7f4;
  border-top: 4px solid var(--sage);
}
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}
.tag-list li {
  padding: 7px 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.77rem;
  font-weight: 700;
}
.future-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.future-card {
  min-height: 220px;
  padding: 24px;
  border: 1px dashed var(--navy);
  background: #f7fafc;
}
.future-card strong {
  display: block;
  margin-bottom: 26px;
  color: var(--navy);
  font-size: 0.78rem;
}
.journey-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
  list-style: none;
}
.journey-grid-six {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.journey-card {
  display: flex;
  min-height: 250px;
  flex-direction: column;
  padding: 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.journey-card strong,
.evidence-grid article > strong {
  display: block;
  color: var(--accent-dark);
  font: 700 0.74rem var(--mono);
  letter-spacing: 0.06em;
}
.journey-card h3 {
  margin: 30px 0 12px;
  font-size: 1.16rem;
}
.journey-card p {
  margin: 0;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.75;
}
.journey-card span {
  display: block;
  margin-top: auto;
  padding-top: 18px;
  color: var(--navy);
  border-top: 1px solid var(--line);
  font: 700 0.72rem var(--mono);
}
.evidence-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
}
.evidence-grid article {
  min-height: 224px;
  padding: 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.evidence-grid h3 {
  margin: 34px 0 12px;
  font-size: 1.14rem;
}
.evidence-grid p {
  margin: 0;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.75;
}
.contract-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 0;
  margin: 0;
  list-style: none;
}
.contract-list li {
  padding: 24px;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  color: var(--text);
  line-height: 1.75;
}
.contract-list strong {
  display: block;
  margin-bottom: 7px;
  color: var(--ink);
}
.related {
  border-top: 1px solid var(--line);
  background: var(--surface);
}
.related-inner {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  gap: 48px;
  padding-top: 64px;
  padding-bottom: 64px;
}
.related-inner h2 {
  margin: 0;
  font-size: 1.35rem;
}
.related-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.related-links a {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 20px;
  border: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
}
.related-links a:hover {
  border-color: var(--accent);
}
.system-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
  list-style: none;
}
.system-flow-eight { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.system-flow li { position: relative; min-height: 210px; padding: 22px 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); }
.system-flow li:not(:last-child)::after { content: "→"; position: absolute; top: 44px; right: -12px; z-index: 2; display: grid; width: 24px; height: 24px; place-items: center; color: var(--accent-dark); background: var(--surface); font-weight: 800; }
.system-flow span { color: var(--accent-dark); font-size: .72rem; font-weight: 800; letter-spacing: .08em; }
.system-flow strong { display: block; margin-top: 38px; color: var(--ink); font-size: 1rem; line-height: 1.45; }
.system-flow li:nth-child(4)::after { display: none; }
.system-flow p { margin: 14px 0 0; color: var(--text); font-size: .78rem; line-height: 1.65; }
.system-flow .is-current { border-top: 5px solid var(--accent); background: #fff7f2; }
.system-flow .is-proposal { border-top: 5px dashed var(--navy); background: #f7fafc; }
.system-flow .is-gate { border-top: 5px solid var(--sage); background: #f4f7f4; }
.system-flow .is-proposal span { color: var(--navy); }
.system-flow .is-gate span { color: var(--sage); }
.architecture-note { display: grid; grid-template-columns: 1fr 1fr; border-right: 1px solid var(--line); border-bottom: 1px solid var(--ink); border-left: 1px solid var(--line); background: var(--surface); }
.architecture-note p { margin: 0; padding: 22px 24px; color: var(--text); font-size: .86rem; line-height: 1.7; }
.architecture-note p + p { border-left: 1px solid var(--line); }
.architecture-note strong { display: block; margin-bottom: 6px; color: var(--ink); }
.data-contract-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--ink); }
.data-contract-grid article { min-height: 290px; padding: 28px; background: var(--surface); }
.data-contract-grid article + article { border-left: 1px solid var(--line); }
.data-contract-grid .data-contract-stays { border-top: 5px solid var(--ink); }
.data-contract-grid .data-contract-learning { border-top: 5px solid var(--sage); background: #f4f7f4; }
.data-contract-grid .data-contract-telemetry { border-top: 5px dashed var(--navy); background: #f7fafc; }
.data-contract-grid h3 { margin: 52px 0 16px; color: var(--ink); font-size: clamp(1.25rem, 2vw, 1.75rem); }
.data-contract-grid article > p:not(.status-label) { color: var(--text); font-size: .9rem; line-height: 1.75; }
.data-contract-grid article > strong { display: block; margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--ink); font-size: .78rem; }
.parallel-contract { display: grid; grid-template-columns: .9fr 1.1fr; border-right: 1px solid var(--ink); border-left: 1px solid var(--ink); background: var(--surface); }
.parallel-contract > div { padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.parallel-contract h3 { margin: 44px 0 14px; color: var(--ink); font-size: 1.55rem; }
.parallel-contract p:not(.status-label) { color: var(--text); line-height: 1.75; }
.parallel-contract dl { display: grid; margin: 0; }
.parallel-contract dl div { display: grid; grid-template-columns: 68px 1fr; align-items: center; padding: 18px 24px; border-bottom: 1px solid var(--line); }
.parallel-contract dt { color: var(--navy); font-weight: 800; }
.parallel-contract dd { margin: 0; color: var(--text); font-size: .86rem; line-height: 1.65; }
@media (max-width: 900px) {
  .detail-hero-grid,
  .detail-section-head,
  .related-inner {
    grid-template-columns: 1fr;
  }
  .detail-section-head > p {
    padding-top: 0;
  }
  .step-grid,
  .info-grid,
  .future-grid,
  .journey-grid,
  .journey-grid-six,
  .evidence-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .detail-contract {
    max-width: 560px;
  }
}
@media (max-width: 640px) {
  .context-bar { top: 64px; }
  .context-bar-inner { min-height: 44px; }
  .context-bar p { display: none; }
  .detail-hero {
    padding: 48px 0 72px;
  }
  .detail-title {
    font-size: 2.5rem;
    line-height: 1.08;
    letter-spacing: -0.045em;
  }
  .detail-section {
    padding: 72px 0;
  }
  .step-grid,
  .info-grid,
  .future-grid,
  .journey-grid,
  .journey-grid-six,
  .evidence-grid,
  .split-panel,
  .contract-list,
  .related-links {
    grid-template-columns: 1fr;
  }
  .split-panel > article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }
  .human-gate {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 900px) {
  .system-flow, .system-flow-eight { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .system-flow li:nth-child(even)::after { display: none; }
  .parallel-contract { grid-template-columns: 1fr; }
  .parallel-contract > div { border-right: 0; }
}
@media (max-width: 640px) {
  .system-flow, .system-flow-eight, .data-contract-grid, .architecture-note { grid-template-columns: 1fr; }
  .system-flow li { min-height: 180px; }
  .system-flow li:not(:last-child)::after, .system-flow li:nth-child(even)::after { content: "↓"; top: auto; right: 22px; bottom: -12px; display: grid; }
  .system-flow strong { margin-top: 28px; }
  .architecture-note p + p, .data-contract-grid article + article { border-top: 1px solid var(--line); border-left: 0; }
  .data-contract-grid article { min-height: 280px; }
  .data-contract-grid h3 { margin-top: 42px; }
}