.approach-hero {
  border-bottom: 1px solid var(--rule);
}

.approach-hero-grid,
.architecture-heading,
.principles-grid,
.powered-meaning-grid {
  display: grid;
  grid-template-columns: minmax(150px, 0.32fr) minmax(0, 1fr);
  gap: 64px;
}

.approach-hero-grid {
  padding-top: 82px;
  padding-bottom: 78px;
}

.approach-hero h1,
.architecture-heading h2,
.architecture-panel h3,
.system-principles h2,
.system-principles h3,
.powered-meaning h2 {
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 400;
  letter-spacing: 0;
}

.approach-hero h1 {
  max-width: 970px;
  font-size: 4.8rem;
  line-height: 0.98;
}

.approach-hero-grid > div > p {
  max-width: 760px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.72;
}

.approach-hero-grid > div > .approach-definition {
  max-width: 670px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  color: var(--ink);
  font-size: 0.84rem;
}

.approach-definition strong {
  color: var(--green);
  font-weight: 600;
}

.system-architecture {
  padding: 88px 0 0;
  color: #f7faf8;
  background: var(--deep);
}

.system-architecture .section-kicker,
.architecture-label {
  color: var(--gold-soft);
}

.architecture-heading {
  padding-bottom: 64px;
}

.architecture-heading h2,
.system-principles h2,
.powered-meaning h2 {
  max-width: 870px;
  font-size: 3.35rem;
  line-height: 1.04;
}

.architecture-heading > div > p {
  max-width: 710px;
  margin: 22px 0 0;
  color: #aebdb6;
  font-size: 0.92rem;
  line-height: 1.72;
}

.architecture-map {
  display: grid;
  grid-template-columns: minmax(250px, 0.92fr) minmax(340px, 1.2fr) minmax(240px, 0.88fr);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.architecture-panel {
  position: relative;
  min-height: 480px;
  padding: 34px 34px 38px;
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.architecture-panel:last-child {
  border-right: 0;
}

.architecture-panel:not(:last-child)::after {
  position: absolute;
  z-index: 3;
  top: 50%;
  right: -15px;
  width: 29px;
  height: 29px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(222, 196, 128, 0.6);
  color: var(--gold-soft);
  background: var(--deep);
  content: "→";
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
}

.architecture-label {
  margin: 0 0 19px;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.62rem;
  line-height: 1.5;
  text-transform: uppercase;
}

.architecture-panel h3 {
  max-width: 350px;
  font-size: 2.15rem;
  line-height: 1.08;
}

.architecture-panel > p:last-child {
  margin: 22px 0 0;
  color: #aebdb6;
  font-size: 0.72rem;
  line-height: 1.6;
}

.source-constellation {
  position: relative;
  height: 238px;
  margin-top: 28px;
}

.source-object {
  position: absolute;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 16px 18px rgba(0, 0, 0, 0.26));
}

.source-object-book {
  z-index: 3;
  left: 0;
  bottom: 0;
  width: 43%;
  height: 205px;
}

.source-object-paper {
  z-index: 1;
  top: 16px;
  right: 0;
  width: 63%;
  height: 178px;
  object-fit: cover;
  object-position: top;
  opacity: 0.78;
  transform: rotate(3deg);
}

.source-object-program {
  z-index: 2;
  right: 18px;
  bottom: 3px;
  width: 42%;
  height: 145px;
  transform: rotate(-2deg);
}

.architecture-core {
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    #0a2118;
  background-size: 28px 28px;
}

.core-capabilities {
  margin-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.core-capabilities > div {
  min-height: 90px;
  padding: 20px 0;
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
}

.core-capabilities strong {
  color: #fff;
  font-size: 0.82rem;
  font-weight: 500;
}

.core-capabilities span {
  color: #aebdb6;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.63rem;
  line-height: 1.7;
}

.architecture-outputs ul {
  margin: 36px 0 0;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  list-style: none;
}

.architecture-outputs li {
  position: relative;
  padding: 18px 24px 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
  color: #f4f7f5;
  font-size: 0.78rem;
  line-height: 1.45;
}

.architecture-outputs li::after {
  position: absolute;
  top: 18px;
  right: 0;
  color: var(--gold-soft);
  content: "↗";
}

.evidence-rail {
  min-height: 90px;
  padding: 22px 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
}

.evidence-rail strong {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.55rem;
  font-weight: 400;
}

.evidence-rail > span {
  color: #aebdb6;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.63rem;
  line-height: 1.6;
}

.system-principles {
  border-bottom: 1px solid var(--rule);
  background: #fff;
}

.principles-grid {
  padding-top: 92px;
  padding-bottom: 96px;
}

.principle-list {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--rule);
}

.principle-list article {
  min-height: 260px;
  padding: 24px 26px 24px 0;
  border-right: 1px solid var(--rule);
}

.principle-list article + article {
  padding-left: 26px;
}

.principle-list article:last-child {
  border-right: 0;
}

.principle-list article > span {
  color: var(--green);
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.62rem;
}

.principle-list h3 {
  margin-top: 42px;
  font-size: 1.65rem;
  line-height: 1.15;
}

.principle-list p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.65;
}

.principles-close {
  margin: 44px 0 0;
  color: var(--green);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.8rem;
  line-height: 1.3;
}

.powered-meaning {
  color: #fff;
  background: var(--forest);
}

.powered-meaning-grid {
  padding-top: 88px;
  padding-bottom: 94px;
}

.powered-meaning .section-kicker {
  color: var(--gold-soft);
}

.powered-meaning-grid > div > p {
  max-width: 760px;
  margin: 24px 0 0;
  color: #b7c7c0;
  font-size: 0.92rem;
  line-height: 1.72;
}

.powered-projects {
  max-width: 930px;
  margin-top: 42px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.powered-projects a {
  min-height: 94px;
  padding: 20px 0;
  display: grid;
  grid-template-columns: minmax(210px, 0.8fr) minmax(260px, 1fr) auto;
  gap: 28px;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff;
  text-decoration: none;
}

.powered-projects a > span {
  color: #aebdb6;
  font-size: 0.7rem;
  line-height: 1.5;
}

.powered-projects strong {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.45rem;
  font-weight: 400;
}

.powered-projects i {
  color: var(--gold-soft);
  font-style: normal;
}

.powered-meaning-grid .powered-close {
  margin-top: 44px;
  color: var(--gold-soft);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.65rem;
  line-height: 1.3;
}

@media (max-width: 980px) {
  .approach-hero h1 {
    font-size: 4rem;
  }

  .architecture-map {
    grid-template-columns: 1fr;
  }

  .architecture-panel {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  }

  .architecture-panel:not(:last-child)::after {
    top: auto;
    right: 34px;
    bottom: -15px;
    transform: rotate(90deg);
  }

  .architecture-sources {
    display: grid;
    grid-template-columns: minmax(230px, 0.7fr) minmax(320px, 1.3fr);
    column-gap: 38px;
  }

  .architecture-sources .architecture-label,
  .architecture-sources h3,
  .architecture-sources > p:last-child {
    grid-column: 1;
  }

  .source-constellation {
    grid-column: 2;
    grid-row: 1 / span 3;
    margin-top: 0;
  }
}

@media (max-width: 820px) {
  .approach-hero-grid,
  .architecture-heading,
  .principles-grid,
  .powered-meaning-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .approach-hero-grid {
    padding-top: 64px;
    padding-bottom: 62px;
  }

  .approach-hero h1 {
    font-size: 3.35rem;
  }

  .system-architecture {
    padding-top: 66px;
  }

  .architecture-heading {
    padding-bottom: 48px;
  }

  .architecture-heading h2,
  .system-principles h2,
  .powered-meaning h2 {
    font-size: 2.7rem;
  }

  .principles-grid,
  .powered-meaning-grid {
    padding-top: 68px;
    padding-bottom: 72px;
  }

  .principle-list {
    grid-template-columns: 1fr;
  }

  .principle-list article,
  .principle-list article + article {
    min-height: 0;
    padding: 24px 0 28px;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
  }

  .principle-list article:last-child {
    border-bottom: 0;
  }

  .principle-list h3 {
    margin-top: 24px;
  }
}

@media (max-width: 620px) {
  .approach-hero h1 {
    font-size: 2.7rem;
  }

  .approach-hero-grid > div > p {
    font-size: 0.92rem;
  }

  .architecture-heading h2,
  .system-principles h2,
  .powered-meaning h2 {
    font-size: 2.25rem;
  }

  .architecture-panel {
    padding: 28px 0 34px;
  }

  .architecture-panel:not(:last-child)::after {
    right: 0;
  }

  .architecture-sources {
    display: block;
  }

  .source-constellation {
    height: 220px;
    margin-top: 24px;
  }

  .architecture-panel h3 {
    font-size: 1.95rem;
  }

  .core-capabilities > div {
    grid-template-columns: 82px minmax(0, 1fr);
  }

  .evidence-rail {
    padding: 24px 0 28px;
    align-items: flex-start;
    flex-direction: column;
  }

  .evidence-rail strong {
    font-size: 1.35rem;
  }

  .powered-projects a {
    grid-template-columns: 1fr auto;
    gap: 10px 18px;
  }

  .powered-projects a > span {
    grid-column: 1 / -1;
  }

  .powered-projects strong {
    font-size: 1.25rem;
  }
}