:root {
  --color-page: #f7f9fa;
  --color-dark: #101b24;
  --color-structural: #17356b;
  --color-text: #1d252b;
  --color-secondary: #58646d;
  --color-border: #cdd6dd;
  --color-panel: #ffffff;
  --color-alt: #eef3f7;
  --color-accent: #2457d6;
  --color-accent-strong: #2457d6;
  --color-light-text: #ffffff;
  --color-light-secondary: #c8d2d9;

  --font-family-base: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-size-small: 0.92rem;
  --font-size-base: 1.05rem;
  --font-size-large: 1.2rem;
  --font-size-xl: 1.65rem;
  --font-size-2xl: 2.45rem;
  --font-size-3xl: 3.55rem;

  --max-width: 1180px;
  --gutter: 1.5rem;
  --section-padding: 5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-page);
  color: var(--color-text);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

p,
h1,
h2,
h3,
ul {
  margin-block-start: 0;
}

p {
  max-width: 680px;
  margin-block-end: 0;
  color: var(--color-secondary);
}

ul {
  margin: 0;
  padding-inline-start: 1.1rem;
}

li {
  color: var(--color-secondary);
}

h1,
h2,
h3 {
  margin-block-end: 0;
  color: var(--color-text);
  font-weight: 650;
  letter-spacing: 0;
}

h1 {
  max-width: 720px;
  font-size: var(--font-size-3xl);
  line-height: 1.04;
}

h2 {
  max-width: 740px;
  font-size: var(--font-size-2xl);
  line-height: 1.12;
}

h3 {
  font-size: var(--font-size-large);
  line-height: 1.2;
}

header {
  height: 68px;
  background: var(--color-panel);
  border-bottom: 1px solid var(--color-border);
}

nav,
.section-inner {
  width: min(100%, calc(var(--max-width) + (var(--gutter) * 2)));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

nav {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

nav > div:first-child {
  color: var(--color-text);
  font-size: 0.98rem;
  font-weight: 750;
  line-height: 1.1;
  white-space: nowrap;
}

nav > div:last-child {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.6rem;
  justify-content: flex-end;
}

nav a {
  color: var(--color-secondary);
  font-size: var(--font-size-small);
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  color: var(--color-accent-strong);
}

section {
  padding-block: var(--section-padding);
}

.section-heading {
  margin-block-end: 2.4rem;
  display: grid;
  gap: 0.85rem;
}

.section-intro,
.hero-summary {
  color: var(--color-secondary);
  font-size: var(--font-size-large);
  line-height: 1.5;
}

.eyebrow {
  color: var(--color-accent);
  font-size: var(--font-size-small);
  font-weight: 750;
}

#hero {
  min-height: 540px;
  padding-block: 0;
  display: flex;
  align-items: center;
  background: var(--color-dark);
  color: var(--color-light-text);
}

#hero .section-inner {
  padding-block: 4.6rem;
  display: grid;
  grid-template-columns: minmax(0, 0.6fr) minmax(280px, 0.4fr);
  gap: 4.5rem;
  align-items: center;
}

#hero h1,
#hero .eyebrow {
  color: var(--color-light-text);
}

#hero .hero-summary {
  max-width: 650px;
  color: var(--color-light-secondary);
}

.hero-copy {
  display: grid;
  gap: 1.35rem;
}

.primary-action {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  min-height: 2.8rem;
  padding: 0.72rem 1rem;
  border: 1px solid var(--color-accent);
  color: var(--color-light-text);
  background: var(--color-accent);
  font-size: var(--font-size-small);
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
}

.primary-action:hover,
.primary-action:focus-visible {
  border-color: var(--color-accent-strong);
  color: var(--color-light-text);
  background: var(--color-accent-strong);
}

.capability-index {
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.capability-index div {
  display: grid;
  grid-template-columns: 1fr;
  padding-block: 1.1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  color: var(--color-light-text);
  font-size: var(--font-size-large);
  line-height: 1.25;
}

.capability-index span {
  color: var(--color-light-secondary);
  font-size: var(--font-size-small);
}

#capabilities {
  background: var(--color-page);
}

.capabilities-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.capabilities-list article {
  padding: 1.8rem 1.45rem 1.8rem 0;
  display: grid;
  gap: 0.9rem;
  border-right: 1px solid var(--color-border);
}

.capabilities-list article + article {
  padding-left: 1.45rem;
}

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

.capabilities-list h3 {
  color: var(--color-accent);
}

.capabilities-list p,
.applications-list p {
  font-size: var(--font-size-small);
  line-height: 1.5;
}

.capabilities-list ul {
  display: grid;
  gap: 0.25rem;
}

.capabilities-list li {
  font-size: var(--font-size-small);
}

#approach {
  background: var(--color-alt);
  color: var(--color-text);
}

#approach h2 {
  color: var(--color-text);
}

#approach .section-intro,
#approach p {
  color: var(--color-secondary);
}

.approach-overview {
  display: grid;
  grid-template-columns: minmax(0, 0.47fr) minmax(0, 0.53fr);
  gap: 4rem;
  align-items: center;
}

.approach-overview .section-heading {
  margin-block-end: 0;
}

.approach-overview img {
  width: 100%;
  aspect-ratio: 3 / 2;
  display: block;
  object-fit: cover;
  object-position: center 58%;
}

.method-sequence {
  margin-block: 2.1rem 1.6rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
  font-size: var(--font-size-large);
  font-weight: 750;
}

.method-sequence span:not(:last-child)::after {
  content: "->";
  margin-inline-start: 0.65rem;
  color: var(--color-accent);
  font-weight: 600;
}

.approach-outcome {
  max-width: 780px;
  color: var(--color-secondary);
}

.applications-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.applications-list article {
  min-height: 150px;
  padding: 1.8rem 2rem 1.8rem 0;
  display: grid;
  align-content: start;
  gap: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.applications-list article:nth-child(odd) {
  border-right: 1px solid var(--color-border);
}

.applications-list article:nth-child(even) {
  padding-left: 2rem;
}

.applications-list article:nth-last-child(-n + 2) {
  border-bottom: 0;
}

#applications {
  background: var(--color-panel);
}

#ai {
  background: var(--color-alt);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.42fr) minmax(0, 0.58fr);
  gap: 4rem;
  align-items: start;
}

.split-section > div:first-child,
.section-copy {
  display: grid;
  gap: 1rem;
}

#contact {
  padding-block: 4.4rem;
  background: var(--color-structural);
  color: var(--color-light-text);
}

#contact h2 {
  color: var(--color-light-text);
}

#contact p {
  color: var(--color-light-secondary);
  overflow-wrap: anywhere;
}

.contact-section {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
}

.contact-section > div {
  display: grid;
  gap: 0.85rem;
}

@media (max-width: 920px) {
  :root {
    --font-size-3xl: 2.75rem;
    --font-size-2xl: 2rem;
    --section-padding: 4.25rem;
  }

  #hero {
    min-height: auto;
  }

  #hero .section-inner,
  .approach-overview,
  .split-section {
    grid-template-columns: 1fr;
    gap: 2.7rem;
  }

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

  .capabilities-list article:nth-child(2n) {
    border-right: 0;
  }

  .capabilities-list article:nth-child(n + 3) {
    border-top: 1px solid var(--color-border);
  }

  .capabilities-list article:nth-child(3) {
    padding-left: 0;
  }
}

@media (max-width: 680px) {
  :root {
    --gutter: 1.1rem;
    --font-size-3xl: 2.15rem;
    --font-size-2xl: 1.55rem;
    --font-size-large: 1.08rem;
    --section-padding: 3.5rem;
  }

  header {
    height: auto;
  }

  nav {
    padding-block: 1rem;
    align-items: flex-start;
    flex-direction: column;
    gap: 0.7rem;
  }

  nav > div:first-child {
    white-space: normal;
  }

  nav > div:last-child {
    justify-content: flex-start;
    gap: 0.35rem 1.05rem;
  }

  #hero .section-inner {
    padding-block: 3.6rem;
  }

  .capability-index div {
    font-size: var(--font-size-base);
  }

  .capabilities-list,
  .applications-list {
    grid-template-columns: 1fr;
  }

  .capabilities-list article,
  .capabilities-list article + article,
  .applications-list article,
  .applications-list article:nth-child(even) {
    padding-inline: 0;
    border-right: 0;
  }

  .capabilities-list article + article {
    border-top: 1px solid var(--color-border);
  }

  .applications-list article + article {
    border-top: 1px solid var(--color-border);
  }

  .applications-list article:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--color-border);
  }

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

  .method-sequence {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.45rem;
  }

  .method-sequence span:not(:last-child)::after {
    content: "";
    display: block;
    width: 1px;
    height: 0.85rem;
    margin: 0.45rem 0 0 0.42rem;
    background: var(--color-accent);
  }

  .contact-section {
    align-items: flex-start;
    flex-direction: column;
  }
}

/* Approach page: reuse the site palette, type, and spacing. */
.approach-page a:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 5px;
}

.approach-page nav [aria-current="page"] {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.35em;
}

.approach-skip {
  position: absolute;
  top: 0.5rem;
  left: var(--gutter);
  padding: 0.75rem 1rem;
  background: var(--color-panel);
  transform: translateY(-200%);
}

.approach-skip:focus {
  transform: translateY(0);
}

.approach-hero {
  padding-block: 3.5rem;
  background: var(--color-dark);
}

.approach-hero h1,
.approach-hero .eyebrow {
  color: var(--color-light-text);
}

.approach-hero .hero-summary {
  max-width: 850px;
  color: var(--color-light-secondary);
}

.approach-sequence {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.3rem;
  margin: 0 0 1.75rem;
  padding: 0;
  list-style: none;
  font-size: var(--font-size-large);
  font-weight: 650;
}

.approach-sequence li {
  display: flex;
  align-items: center;
  gap: 1.3rem;
  color: var(--color-text);
}

.approach-sequence a {
  text-decoration: none;
}

.approach-sequence a:hover,
.approach-sequence a:focus-visible {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

.approach-sequence span {
  color: var(--color-accent);
}

.approach-depth {
  scroll-margin-top: 1.5rem;
}

.approach-depth > h3 {
  margin-block-end: 1.25rem;
  color: var(--color-text);
  font-size: var(--font-size-large);
}

.depth-layers {
  margin: 0;
}

.depth-layers > div {
  padding: 0;
}


.depth-layers dt {
  margin-block-end: 0.25rem;
  font-size: var(--font-size-large);
  font-weight: 650;
  line-height: 1.2;
}

.depth-layers dd {
  max-width: 780px;
  margin: 0;
  color: var(--color-secondary);
  line-height: 1.45;
}

.approach-depth .depth-arrow {
  display: block;
  width: 1.5rem;
  text-align: center;
  margin: 0.6rem 0;
  color: var(--color-accent);
  font-size: calc(var(--font-size-large) * 1.2);
  font-weight: 750;
  line-height: 1;
}

.approach-evidence,
.approach-coherence {
  background: var(--color-alt);
}

.approach-evidence-layout,
.approach-state-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 4rem;
  align-items: center;
}

.approach-page figure {
  margin: 0;
  min-width: 0;
}

.approach-page figure img {
  display: block;
  width: 100%;
  height: auto;
}

.approach-page figcaption {
  margin-block-start: 0.75rem;
  color: var(--color-secondary);
  font-size: var(--font-size-small);
  line-height: 1.5;
}

.approach-state-layout {
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
}

.approach-state-list {
  margin: 0.5rem 0 0;
}

.approach-state-list div {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1rem;
  padding-block: 0.85rem;
  border-top: 1px solid var(--color-border);
}

.approach-state-list dt {
  font-weight: 650;
}

.approach-state-list dd {
  margin: 0;
  color: var(--color-secondary);
}

.approach-closing {
  background: var(--color-structural);
}

.approach-closing h2 {
  color: var(--color-light-text);
}

.approach-closing p {
  color: var(--color-light-secondary);
}

@media (max-width: 920px) {
  .approach-evidence-layout,
  .approach-state-layout {
    gap: 2rem;
  }
}

@media (max-width: 680px) {
  .approach-hero {
    padding-block: 2.75rem;
  }

  .approach-sequence {
    flex-direction: column;
    gap: 0.5rem;
  }

  .approach-sequence li {
    justify-content: space-between;
    max-width: 15rem;
  }

  .approach-sequence span {
    transform: rotate(90deg);
  }

  .approach-evidence-layout,
  .approach-state-layout {
    grid-template-columns: 1fr;
  }

  .approach-state-list div {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/* Capabilities page: scoped additions using the existing site system. */
.capabilities-page a:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 5px;
}

.capabilities-page nav [aria-current="page"] {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.35em;
}

.capabilities-skip {
  position: absolute;
  top: 0.5rem;
  left: var(--gutter);
  padding: 0.75rem 1rem;
  background: var(--color-panel);
  transform: translateY(-200%);
}

.capabilities-skip:focus {
  transform: translateY(0);
}

.capabilities-opening {
  padding-block: 3.5rem;
  background: var(--color-dark);
}

.capabilities-opening h1 {
  color: var(--color-light-text);
}

.capabilities-opening .hero-summary {
  max-width: 850px;
  color: var(--color-light-secondary);
}

.capability-detail {
  padding-block: calc(var(--section-padding) * 0.8);
}

.capability-continuity {
  background: var(--color-alt);
}

.capability-transition {
  background: var(--color-panel);
}

.capability-context-layout,
.capability-facilities-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 4rem;
  align-items: start;
}

.capability-scope {
  display: grid;
  gap: 0.5rem;
}

.capability-facilities-layout {
  align-items: center;
}

.capability-facilities-layout figure {
  margin: 0;
  min-width: 0;
}

.capability-facilities-layout img {
  display: block;
  width: 100%;
  height: auto;
}

.capability-facilities-layout figcaption {
  margin-block-start: 0.75rem;
  color: var(--color-secondary);
  font-size: var(--font-size-small);
  line-height: 1.5;
}

@media (max-width: 920px) {
  .capability-context-layout,
  .capability-facilities-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 680px) {
  .capabilities-opening {
    padding-block: 2.75rem;
  }
}

/* Operational AI evidence within Capabilities. */
.capability-ai-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: start;
}

.capability-ai-evidence {
  margin: 0;
  min-width: 0;
}

.capability-ai-evidence a,
.capability-ai-evidence img {
  display: block;
}

.capability-ai-evidence img {
  width: 100%;
  height: auto;
}

.capability-ai-evidence figcaption {
  margin-block-start: 0.75rem;
  color: var(--color-secondary);
  font-size: var(--font-size-small);
  line-height: 1.5;
}

@media (max-width: 920px) {
  .capability-ai-layout {
    grid-template-columns: 1fr;
  }
}