/* Public architecture, specification, and security depth.
 * Loaded after the shared marketing system; intentionally editorial, not card-heavy.
 */

.depth-hero {
  border-bottom: 1px solid var(--edge);
  min-height: min(720px, calc(100svh - 88px));
  padding: clamp(7rem, 12vw, 10rem) 0 clamp(5rem, 9vw, 8rem);
  position: relative;
}

.depth-hero::after {
  background: linear-gradient(90deg, rgba(47, 134, 255, 0.28), transparent 62%);
  bottom: -1px;
  content: "";
  height: 1px;
  left: 0;
  position: absolute;
  width: min(44vw, 620px);
}

.depth-hero-grid {
  align-items: end;
  display: grid;
  gap: clamp(3rem, 8vw, 8rem);
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.5fr);
}

.depth-hero h1 {
  max-width: 920px;
}

.depth-hero h1 span,
.depth-section h2 span,
.pd-control-heading h2 span {
  color: var(--blue-bright);
}

.depth-hero-copy > p {
  font-size: var(--fs-lead);
  max-width: 66ch;
}

.depth-status {
  border-left: 1px solid var(--edge-strong);
  display: grid;
}

.depth-status div {
  border-bottom: 1px solid var(--edge);
  display: grid;
  gap: 0.38rem;
  padding: 1rem 0 1rem 1.2rem;
}

.depth-status span,
.depth-status small,
.depth-contract-meta,
.depth-map-label,
.depth-workspace small {
  color: var(--dim);
  font-family: var(--mono);
  font-size: var(--fs-micro);
  font-weight: 760;
  letter-spacing: 0.075em;
  line-height: 1.45;
  text-transform: uppercase;
}

.depth-status strong {
  color: var(--text);
  font-size: var(--fs-sm);
}

.depth-section {
  border-bottom: 1px solid var(--edge);
  padding: clamp(5rem, 9vw, 8rem) 0;
}

.depth-section-head {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: minmax(0, 0.75fr) minmax(300px, 0.55fr);
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.depth-section-head > p {
  align-self: end;
  margin: 0;
}

.depth-system-map {
  border: 1px solid var(--edge);
  display: grid;
  grid-template-columns: minmax(180px, 0.7fr) minmax(280px, 1.35fr) minmax(180px, 0.7fr);
  min-height: 390px;
}

.depth-map-side,
.depth-map-core {
  display: grid;
  gap: 0.75rem;
  padding: clamp(1.4rem, 3vw, 2.4rem);
}

.depth-map-side {
  align-content: center;
}

.depth-map-side:first-child {
  border-right: 1px solid var(--edge);
}

.depth-map-side:last-child {
  border-left: 1px solid var(--edge);
}

.depth-map-side span:not(.depth-map-label) {
  border-bottom: 1px solid var(--edge-soft);
  color: #dce4ef;
  font-size: var(--fs-sm);
  padding: 0.82rem 0;
}

.depth-map-core {
  align-content: center;
  background:
    radial-gradient(circle at center, rgba(47, 134, 255, 0.1), transparent 42%),
    #020305;
  justify-items: center;
  position: relative;
  text-align: center;
}

.depth-map-core::before,
.depth-map-core::after {
  background: linear-gradient(90deg, transparent, var(--blue), transparent);
  content: "";
  height: 1px;
  left: 9%;
  opacity: 0.65;
  position: absolute;
  right: 9%;
}

.depth-map-core::before { top: 18%; }
.depth-map-core::after { bottom: 18%; }

.depth-map-core strong {
  color: #fff;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  letter-spacing: -0.035em;
  max-width: 500px;
}

.depth-map-core p {
  font-size: var(--fs-sm);
  margin: 0;
  max-width: 46ch;
}

.depth-principles,
.depth-authority-grid {
  border-top: 1px solid var(--edge);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.depth-principle,
.depth-authority {
  border-bottom: 1px solid var(--edge);
  border-right: 1px solid var(--edge);
  display: grid;
  gap: 0.8rem;
  min-height: 240px;
  padding: clamp(1.3rem, 2.5vw, 2rem);
}

.depth-principle:last-child,
.depth-authority:last-child {
  border-right: 0;
}

.depth-principle > span,
.depth-authority > span {
  color: var(--blue-bright);
  font-family: var(--mono);
  font-size: var(--fs-micro);
  font-weight: 780;
  letter-spacing: 0.08em;
}

.depth-principle h3,
.depth-authority h3 {
  margin: 0;
}

.depth-principle p,
.depth-authority p {
  font-size: var(--fs-sm);
  margin: 0;
}

.depth-contracts {
  border-top: 1px solid var(--edge);
}

.depth-contract {
  border-bottom: 1px solid var(--edge);
}

.depth-contract summary {
  align-items: center;
  cursor: pointer;
  display: grid;
  gap: 1.2rem;
  grid-template-columns: 76px minmax(0, 0.65fr) minmax(260px, 1fr) 32px;
  list-style: none;
  min-height: 100px;
  padding: 1rem 0;
}

.depth-contract summary::-webkit-details-marker { display: none; }

.depth-contract summary::after {
  color: var(--blue-bright);
  content: "+";
  font-size: 1.5rem;
  justify-self: end;
}

.depth-contract[open] summary::after { content: "−"; }

.depth-contract summary strong {
  color: #f3f6fb;
  font-size: clamp(1.1rem, 2vw, 1.45rem);
}

.depth-contract summary p {
  font-size: var(--fs-sm);
  margin: 0;
}

.depth-contract-body {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 0.62fr) minmax(0, 1fr);
  padding: 0 32px clamp(2rem, 4vw, 3.5rem) 76px;
}

.depth-contract-body p,
.depth-contract-body li {
  font-size: var(--fs-sm);
}

.depth-contract-body ul {
  color: var(--muted);
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding-left: 1.2rem;
}

.depth-lifecycle {
  counter-reset: lifecycle;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.depth-lifecycle article {
  border-bottom: 1px solid var(--edge);
  border-right: 1px solid var(--edge);
  counter-increment: lifecycle;
  min-height: 220px;
  padding: clamp(1.3rem, 3vw, 2.2rem);
}

.depth-lifecycle article:nth-child(3n) { border-right: 0; }

.depth-lifecycle article::before {
  color: var(--blue-bright);
  content: "0" counter(lifecycle);
  display: block;
  font-family: var(--mono);
  font-size: var(--fs-micro);
  font-weight: 800;
  letter-spacing: 0.09em;
  margin-bottom: 2.2rem;
}

.depth-lifecycle p { font-size: var(--fs-sm); }

.depth-workspaces {
  border: 1px solid var(--edge);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.depth-workspace {
  display: grid;
  gap: 0.75rem;
  min-height: 270px;
  padding: clamp(1.5rem, 3vw, 2.4rem);
}

.depth-workspace + .depth-workspace { border-left: 1px solid var(--edge); }

.depth-workspace strong {
  color: #f5f7fb;
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  letter-spacing: -0.035em;
}

.depth-workspace p { font-size: var(--fs-sm); }

.depth-limit {
  align-items: start;
  background: #030507;
  border: 1px solid var(--edge);
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(180px, 0.45fr) minmax(0, 1fr);
  padding: clamp(1.5rem, 4vw, 3rem);
}

.depth-limit p { margin: 0; }

.pd-control-system {
  border-bottom: 1px solid var(--edge);
  padding: clamp(5.5rem, 9vw, 8rem) 0;
}

.pd-control-heading {
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.55fr);
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.pd-control-heading p { align-self: end; margin: 0; }

.pd-control-rail {
  border-bottom: 1px solid var(--edge);
  border-top: 1px solid var(--edge);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.pd-control-rail article {
  min-height: 250px;
  padding: clamp(1.4rem, 3vw, 2.4rem);
}

.pd-control-rail article + article { border-left: 1px solid var(--edge); }

.pd-control-rail span {
  color: var(--blue-bright);
  font-family: var(--mono);
  font-size: var(--fs-micro);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.pd-control-rail h3 { margin-top: 2.1rem; }
.pd-control-rail p { font-size: var(--fs-sm); }

.pd-depth-links {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  justify-content: space-between;
  padding-top: 2rem;
}

.pd-depth-links > span {
  color: var(--dim);
  font-size: var(--fs-sm);
}

.pd-depth-link-row { display: flex; flex-wrap: wrap; gap: 1.5rem; }

@media (max-width: 900px) {
  .depth-hero-grid,
  .depth-section-head,
  .pd-control-heading,
  .depth-limit {
    grid-template-columns: 1fr;
  }

  .depth-system-map,
  .depth-principles,
  .depth-authority-grid,
  .depth-workspaces,
  .pd-control-rail {
    grid-template-columns: 1fr;
  }

  .depth-map-side:first-child,
  .depth-map-side:last-child,
  .depth-workspace + .depth-workspace,
  .pd-control-rail article + article {
    border-left: 0;
    border-right: 0;
    border-top: 1px solid var(--edge);
  }

  .depth-map-side:first-child { border-top: 0; }

  .depth-principle,
  .depth-authority {
    border-right: 0;
    min-height: auto;
  }

  .depth-lifecycle { grid-template-columns: 1fr 1fr; }
  .depth-lifecycle article:nth-child(3n) { border-right: 1px solid var(--edge); }
  .depth-lifecycle article:nth-child(2n) { border-right: 0; }

  .depth-contract summary {
    gap: 0.65rem;
    grid-template-columns: 54px minmax(0, 1fr) 28px;
    padding: 1.2rem 0;
  }

  .depth-contract summary p { grid-column: 2 / -1; }
  .depth-contract-body { grid-template-columns: 1fr; padding-left: 54px; }
}

@media (max-width: 600px) {
  .depth-hero { min-height: auto; }
  .depth-lifecycle { grid-template-columns: 1fr; }
  .depth-lifecycle article,
  .depth-lifecycle article:nth-child(3n) { border-right: 0; }
  .depth-contract summary { grid-template-columns: 42px minmax(0, 1fr) 24px; }
  .depth-contract summary p { display: none; }
  .depth-contract-body { padding-left: 42px; padding-right: 0; }
  .pd-depth-links { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  .depth-contract summary { scroll-behavior: auto; }
}