.engine-page {
  background:
    linear-gradient(rgba(16, 24, 32, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 24, 32, 0.025) 1px, transparent 1px),
    var(--paper);
  background-size: 72px 72px;
}

.engine-page .nav-links a[aria-current="page"] {
  background: rgba(130, 222, 217, 0.12);
  color: var(--cyan);
}

.engine-hero {
  position: relative;
  min-height: 88vh;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(420px, 0.96fr);
  gap: clamp(42px, 7vw, 100px);
  align-items: center;
  padding: 132px max(24px, calc((100vw - 1180px) / 2)) 72px;
  background:
    linear-gradient(rgba(130, 222, 217, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(130, 222, 217, 0.045) 1px, transparent 1px),
    radial-gradient(circle at 76% 18%, rgba(24, 167, 156, 0.24), transparent 32%),
    radial-gradient(circle at 18% 82%, rgba(215, 168, 74, 0.12), transparent 34%),
    var(--deep);
  background-size: 72px 72px, 72px 72px, auto, auto, auto;
  color: #fffaf0;
}

.engine-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 180px;
  background: linear-gradient(transparent, rgba(5, 13, 21, 0.68));
  pointer-events: none;
}

.engine-hero-copy,
.engine-core {
  position: relative;
  z-index: 1;
}

.engine-hero h1 {
  margin-bottom: 26px;
  font-size: clamp(3.2rem, 6.8vw, 6.8rem);
  line-height: 0.94;
}

.engine-hero h1 span {
  display: block;
  width: fit-content;
}

.engine-hero h1 small {
  display: block;
  margin-top: 20px;
  color: #fffaf0;
  font-size: clamp(1.55rem, 2.6vw, 2.75rem);
  line-height: 1.1;
}

.engine-slogan {
  margin-bottom: 22px;
  color: var(--gold-soft);
  font-size: clamp(1.35rem, 2.1vw, 1.85rem);
  font-weight: 850;
}

.engine-slogan em {
  display: block;
  margin-top: 6px;
  color: rgba(255, 250, 240, 0.5);
  font-size: 0.56em;
  font-style: normal;
  font-weight: 650;
  letter-spacing: 0.03em;
}

.engine-hero-lead {
  max-width: 720px;
  margin-bottom: 30px;
  color: rgba(255, 250, 240, 0.74);
  font-size: clamp(1rem, 1.55vw, 1.16rem);
  line-height: 1.84;
}

.engine-local-note {
  margin: 26px 0 0;
  color: var(--cyan);
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.engine-core {
  overflow: hidden;
  border: 1px solid rgba(130, 222, 217, 0.26);
  border-radius: 8px;
  background: rgba(5, 13, 21, 0.74);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.28),
    inset 0 0 70px rgba(24, 167, 156, 0.06);
}

.core-topbar,
.core-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 48px;
  padding: 0 18px;
  color: rgba(255, 250, 240, 0.48);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.core-topbar {
  border-bottom: 1px solid rgba(130, 222, 217, 0.14);
}

.core-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--cyan);
}

.core-status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 14px var(--cyan);
}

.core-body {
  display: grid;
  gap: 1px;
  padding: 18px;
}

.core-line {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  min-height: 72px;
  border-left: 2px solid rgba(130, 222, 217, 0.2);
  padding: 12px 16px;
  background: rgba(255, 250, 240, 0.035);
}

.core-line.active {
  border-left-color: var(--gold);
  background: linear-gradient(90deg, rgba(215, 168, 74, 0.12), rgba(255, 250, 240, 0.035));
}

.core-line small,
.core-line span {
  font-family: "SFMono-Regular", Consolas, monospace;
}

.core-line small {
  color: var(--teal);
  font-weight: 850;
}

.core-line strong {
  color: #fffaf0;
  font-size: 0.96rem;
}

.core-line span {
  color: rgba(255, 250, 240, 0.4);
  font-size: 0.63rem;
  text-align: right;
}

.core-route {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding: 0 20px;
  border-top: 1px solid rgba(130, 222, 217, 0.1);
  background:
    linear-gradient(90deg, transparent, rgba(130, 222, 217, 0.2), transparent) center / calc(100% - 68px) 1px no-repeat;
}

.core-route i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 18px rgba(24, 167, 156, 0.8);
}

.core-route i:nth-child(4) {
  width: 12px;
  height: 12px;
  background: var(--gold);
  box-shadow: 0 0 22px rgba(215, 168, 74, 0.8);
}

.core-footer {
  justify-content: flex-start;
  flex-wrap: wrap;
  border-top: 1px solid rgba(130, 222, 217, 0.12);
}

.core-footer span {
  border-left: 2px solid var(--teal);
  padding-left: 8px;
}

.engine-thesis {
  padding-top: 68px;
}

.engine-thesis-grid,
.engine-section-heading,
.evidence,
.local-model,
.boundaries,
.engine-contact {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(36px, 6vw, 92px);
  align-items: start;
}

.engine-thesis h2,
.engine-section-heading h2,
.evidence h2,
.local-model h2,
.boundaries h2,
.engine-contact h2 {
  margin-bottom: 0;
  font-size: clamp(2.05rem, 4vw, 4.35rem);
  line-height: 1.06;
}

.engine-thesis p,
.engine-section-heading p,
.evidence-copy > p,
.local-model-copy > p,
.boundaries-copy > p,
.engine-contact p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.82;
}

.engine-capabilities {
  width: 100%;
  max-width: none;
  padding: 88px max(24px, calc((100vw - 1180px) / 2));
  background: #fffaf0;
}

.engine-capabilities > .section-kicker,
.engine-capabilities > .engine-section-heading,
.capability-grid {
  width: min(1180px, 100%);
  margin-left: auto;
  margin-right: auto;
}

.engine-section-heading {
  margin-bottom: 36px;
}

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

.capability-grid article {
  min-height: 300px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: var(--surface);
  box-shadow: 0 14px 34px rgba(16, 24, 32, 0.055);
}

.capability-grid article > span {
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 900;
}

.capability-grid h3 {
  margin: 46px 0 16px;
  font-size: 1.28rem;
}

.capability-grid p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.76;
}

.engine-workflow {
  width: 100%;
  padding: 92px 24px;
  background:
    radial-gradient(circle at 20% 10%, rgba(24, 167, 156, 0.12), transparent 30%),
    var(--deep);
  color: #fffaf0;
}

.engine-workflow-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.engine-workflow .engine-section-heading p {
  color: rgba(255, 250, 240, 0.6);
}

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.workflow-grid li {
  min-height: 246px;
  border: 1px solid rgba(255, 250, 240, 0.11);
  border-radius: 8px;
  padding: 20px;
  background: rgba(255, 250, 240, 0.045);
}

.workflow-grid li > span {
  color: var(--cyan);
  font-size: 0.82rem;
  font-weight: 900;
}

.workflow-grid strong {
  display: block;
  margin: 50px 0 16px;
  font-size: 1.15rem;
}

.workflow-grid p {
  margin: 0;
  color: rgba(255, 250, 240, 0.56);
  line-height: 1.7;
}

.workflow-route {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 28px;
  border-top: 1px solid rgba(130, 222, 217, 0.18);
  padding-top: 22px;
  color: rgba(255, 250, 240, 0.68);
  font-size: 0.88rem;
  font-weight: 760;
}

.workflow-route i {
  color: var(--gold);
  font-style: normal;
}

.evidence {
  align-items: center;
}

.evidence-copy h2 {
  margin-bottom: 22px;
}

.evidence-note {
  border-left: 2px solid var(--gold);
  padding-left: 14px;
  font-size: 0.88rem !important;
}

.evidence-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.evidence-panel div {
  min-height: 176px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.7);
}

.evidence-panel small {
  color: var(--teal);
  font-weight: 850;
}

.evidence-panel strong {
  margin: auto 0 10px;
  font-size: 1.2rem;
}

.evidence-panel span {
  color: var(--muted);
  line-height: 1.55;
}

.local-model {
  align-items: center;
  border-top: 1px solid var(--line);
}

.local-model-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

.local-box {
  min-height: 238px;
  display: flex;
  flex-direction: column;
  border-radius: 8px;
  padding: 22px;
}

.local-box > span {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.local-box strong {
  margin: auto 0 16px;
  font-size: 1.18rem;
}

.local-box p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
}

.local-box.private {
  background: var(--deep-2);
  color: #fffaf0;
}

.local-box.private > span {
  color: var(--cyan);
}

.local-box.private p {
  color: rgba(255, 250, 240, 0.58);
}

.local-box.public {
  border: 1px solid var(--line);
  background: #fffaf0;
}

.local-box.public > span {
  color: var(--teal);
}

.local-box.public p {
  color: var(--muted);
}

.local-arrow {
  color: var(--gold);
  font-size: 1.5rem;
}

.boundaries {
  align-items: start;
  border: 1px solid rgba(255, 250, 240, 0.12);
  border-radius: 8px;
  padding: clamp(30px, 5vw, 52px);
  background: var(--deep-2);
  color: #fffaf0;
  box-shadow: var(--shadow);
}

.boundaries-copy p {
  color: rgba(255, 250, 240, 0.64);
}

.boundary-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.boundary-list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  border-top: 1px solid rgba(255, 250, 240, 0.12);
  padding: 18px 0;
}

.boundary-list li:last-child {
  border-bottom: 1px solid rgba(255, 250, 240, 0.12);
}

.boundary-list span {
  color: var(--gold);
  font-weight: 900;
}

.boundary-list p {
  margin: 0;
  color: rgba(255, 250, 240, 0.68);
  line-height: 1.7;
}

.engine-contact {
  align-items: center;
}

.engine-contact h2 {
  margin-bottom: 18px;
}

.engine-contact .primary-link {
  justify-self: end;
  min-width: 220px;
}

@media (max-width: 1040px) {
  .engine-hero {
    grid-template-columns: 1fr;
  }

  .engine-core {
    width: min(760px, 100%);
  }

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

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

@media (max-width: 780px) {
  .engine-hero {
    min-height: auto;
    padding: 112px 18px 56px;
  }

  .engine-hero h1 {
    font-size: clamp(2.8rem, 14vw, 4.4rem);
  }

  .engine-thesis-grid,
  .engine-section-heading,
  .evidence,
  .local-model,
  .boundaries,
  .engine-contact {
    grid-template-columns: 1fr;
  }

  .core-line {
    grid-template-columns: 64px minmax(0, 1fr);
  }

  .core-line span {
    display: none;
  }

  .engine-capabilities {
    padding: 64px 16px;
  }

  .capability-grid,
  .workflow-grid,
  .evidence-panel {
    grid-template-columns: 1fr;
  }

  .capability-grid article,
  .workflow-grid li {
    min-height: 220px;
  }

  .workflow-route {
    align-items: flex-start;
    flex-direction: column;
  }

  .workflow-route i {
    transform: rotate(90deg);
    margin-left: 18px;
  }

  .local-model-diagram {
    grid-template-columns: 1fr;
  }

  .local-arrow {
    transform: rotate(90deg);
    justify-self: center;
  }

  .engine-contact .primary-link {
    width: 100%;
    justify-self: stretch;
  }
}