:root {
  --ink: #102338;
  --ink-deep: #071728;
  --paper: #f5f3ee;
  --paper-bright: #fffefb;
  --blue: #145fb3;
  --blue-light: #dbe9f7;
  --copper: #b56d3c;
  --line: #cbd3d9;
  --muted: #536273;
  --shell: 76rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Avenir Next", Avenir, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--copper);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  background: var(--paper-bright);
  color: var(--ink-deep);
  transform: translateY(-200%);
}

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

.shell {
  width: min(calc(100% - 3rem), var(--shell));
  margin-inline: auto;
}

.site-header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid rgb(255 255 255 / 16%);
  background: var(--ink-deep);
  color: #fff;
}

.header-inner {
  min-height: 5.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand-mark {
  width: 2.6rem;
  height: 2.6rem;
  display: grid;
  place-items: center;
  border: 1px solid rgb(255 255 255 / 44%);
  color: #fff;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 700;
  letter-spacing: -0.08em;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.25rem);
}

nav a {
  padding-block: 0.35rem;
  color: #dce5ee;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

nav a:hover,
nav a:focus-visible {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 0.35rem;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(4.5rem, 9vw, 8.5rem) 0 clamp(5rem, 9vw, 8rem);
  background: var(--ink-deep);
  color: #fff;
}

.hero::before {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(110deg, transparent 58%, rgb(20 95 179 / 15%) 58%, transparent 82%),
    repeating-linear-gradient(90deg, transparent 0, transparent calc(25% - 1px), rgb(255 255 255 / 5%) 25%);
  content: "";
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(18rem, 0.72fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: end;
}

.eyebrow,
.status-kicker {
  margin: 0 0 1.5rem;
  color: #9bc3ef;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

h3 {
  margin-top: 0;
  line-height: 1.25;
}

h1 {
  max-width: 13ch;
  margin: 0;
  font-size: clamp(3.2rem, 7.2vw, 6.7rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.hero-lede {
  max-width: 49rem;
  margin: 2.25rem 0 0;
  color: #cfdbe6;
  font-size: clamp(1.06rem, 1.6vw, 1.28rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2.5rem;
}

.button {
  display: inline-flex;
  min-height: 3.1rem;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  border: 1px solid transparent;
  font-size: 0.83rem;
  font-weight: 800;
  letter-spacing: 0.035em;
  text-decoration: none;
}

.button-primary {
  background: #fff;
  color: var(--ink-deep);
}

.button-secondary {
  border-color: rgb(255 255 255 / 45%);
  color: #fff;
}

.button:hover,
.button:focus-visible {
  outline: 3px solid var(--copper);
  outline-offset: 3px;
}

.status-card {
  border-top: 3px solid var(--copper);
  padding: 2rem;
  background: rgb(255 255 255 / 7%);
  backdrop-filter: blur(8px);
}

.status-card h2 {
  margin: 0;
  font-size: clamp(2.25rem, 4vw, 3.4rem);
  line-height: 1.05;
}

.status-card > p:not(.status-kicker) {
  margin: 1rem 0 2rem;
  color: #cfdbe6;
}

.status-card dl {
  margin: 0;
  display: grid;
  grid-template-columns: 6rem 1fr;
  column-gap: 1rem;
}

.status-card dt,
.status-card dd {
  padding: 0.85rem 0;
  border-top: 1px solid rgb(255 255 255 / 18%);
}

.status-card dt {
  color: #8fa5b8;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status-card dd {
  margin: 0;
  font-size: 0.9rem;
}

.section {
  padding: clamp(5rem, 9vw, 8.5rem) 0;
  scroll-margin-top: 1rem;
}

.section-label {
  margin: 0 0 1.2rem;
  color: var(--blue);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-label-light {
  color: #9bc3ef;
}

.display-heading {
  max-width: 15ch;
  margin: 0;
  color: var(--ink-deep);
  font-size: clamp(2.7rem, 5.4vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  text-wrap: balance;
}

.lead {
  margin-top: 0;
  font-size: clamp(1.1rem, 1.75vw, 1.36rem);
  line-height: 1.55;
}

.opening-grid,
.lab-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(20rem, 1.1fr);
  gap: clamp(3rem, 8vw, 7.5rem);
}

.opening-copy {
  max-width: 43rem;
}

.opening-copy p:last-child,
.lab-grid p:last-child {
  color: var(--muted);
}

.mechanism-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(4rem, 7vw, 6.5rem);
  border-top: 3px solid var(--copper);
  background: var(--ink);
  color: #fff;
}

.mechanism-strip div {
  min-height: 14rem;
  padding: clamp(1.5rem, 3.5vw, 2.7rem);
  border-right: 1px solid rgb(255 255 255 / 16%);
}

.mechanism-strip div:last-child {
  border-right: 0;
}

.mechanism-strip span,
.pillar-number {
  display: block;
  margin-bottom: 2.5rem;
  color: #87a6c2;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.pillar-number {
  color: #4b6377;
}

.mechanism-strip strong {
  display: block;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.55rem;
  font-weight: 400;
}

.mechanism-strip p {
  margin-bottom: 0;
  color: #bfcdda;
  font-size: 0.9rem;
}

.pillars-section {
  border-top: 1px solid var(--line);
  background: var(--paper-bright);
}

.section-heading-row {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.55fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: end;
}

.section-heading-row > p {
  margin: 0 0 0.5rem;
  color: var(--muted);
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin: clamp(4rem, 7vw, 6.5rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  list-style: none;
}

.pillar-grid li {
  min-height: 21rem;
  padding: clamp(1.75rem, 4vw, 3.25rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.pillar-grid h3 {
  margin-bottom: 1.1rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 400;
}

.pillar-grid p {
  max-width: 34rem;
  color: var(--muted);
}

.research-section {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: #fff;
}

.research-section::after {
  position: absolute;
  top: -15rem;
  right: -14rem;
  width: 40rem;
  height: 40rem;
  border: 1px solid rgb(155 195 239 / 16%);
  border-radius: 50%;
  box-shadow: 0 0 0 5rem rgb(155 195 239 / 3%), 0 0 0 10rem rgb(155 195 239 / 2%);
  content: "";
  pointer-events: none;
}

.research-section .shell {
  position: relative;
  z-index: 1;
}

.research-section .display-heading,
.ai-section .display-heading,
.collaboration-section .display-heading {
  color: #fff;
}

.research-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(20rem, 1.2fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: end;
}

.research-intro .lead {
  margin-bottom: 0.4rem;
  color: #d7e3ed;
}

.research-proposition {
  max-width: 54rem;
  margin: clamp(3.5rem, 7vw, 6rem) 0 0 auto;
  padding-left: clamp(1.5rem, 4vw, 3rem);
  border-left: 3px solid var(--copper);
  color: #fff;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.65rem, 3.2vw, 2.8rem);
  line-height: 1.25;
}

.research-parts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: clamp(4rem, 8vw, 7rem);
  background: rgb(255 255 255 / 18%);
}

.research-card {
  min-height: 30rem;
  padding: clamp(2rem, 5vw, 4rem);
  background: #152b42;
}

.research-card-accent {
  background: #1a3652;
}

.card-status {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid rgb(255 255 255 / 20%);
  color: #9bc3ef;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.research-card h3 {
  max-width: 18ch;
  margin: clamp(3rem, 6vw, 5rem) 0 1.5rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.75rem, 3.1vw, 2.7rem);
  font-weight: 400;
}

.research-card p {
  color: #c6d5e1;
}

.evidence-section {
  background: #e9eef1;
}

.evidence-grid {
  display: grid;
  grid-template-columns: minmax(18rem, 0.75fr) minmax(24rem, 1.25fr);
  gap: clamp(3.5rem, 9vw, 8.5rem);
}

.evidence-heading {
  align-self: start;
}

.evidence-heading .lead {
  margin-top: 2rem;
  color: var(--muted);
}

.status-list {
  border-top: 1px solid #aebcc7;
}

.status-list article {
  display: grid;
  grid-template-columns: 2.8rem 1fr;
  gap: 1.4rem;
  padding: 2rem 0;
  border-bottom: 1px solid #aebcc7;
}

.status-symbol {
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  border: 1px solid #7a8d9e;
  color: var(--blue);
  font-size: 0.75rem;
  font-weight: 800;
}

.status-list h3 {
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

.status-list p {
  margin: 0;
  color: var(--muted);
}

.principles-section {
  background: var(--paper-bright);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: clamp(4rem, 7vw, 6.5rem);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.principle-grid article {
  min-height: 15.5rem;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.principle-grid h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.45rem;
  font-weight: 400;
}

.principle-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.ai-section {
  background: var(--blue);
  color: #fff;
}

.ai-section .section-label-light {
  color: #fff;
}

.ai-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(22rem, 1.15fr);
  gap: clamp(3.5rem, 9vw, 8.5rem);
}

.ai-grid > div:last-child > .lead {
  color: #eaf3fc;
}

.ai-boundaries {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 2.5rem;
  border-top: 1px solid rgb(255 255 255 / 45%);
  border-bottom: 1px solid rgb(255 255 255 / 45%);
}

.ai-boundaries article {
  padding: 2rem 2rem 2rem 0;
}

.ai-boundaries article + article {
  padding-left: 2rem;
  border-left: 1px solid rgb(255 255 255 / 45%);
}

.ai-boundaries h3 {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-boundaries p {
  margin-bottom: 0;
  color: #e1edf8;
}

.ai-note {
  margin: 2rem 0 0;
  color: #d6e6f5;
  font-size: 0.93rem;
}

.lab-section {
  background: var(--paper);
}

.collaboration-section {
  border-bottom: 1px solid rgb(255 255 255 / 15%);
  background: var(--ink-deep);
  color: #fff;
}

.collaboration-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(20rem, 0.9fr);
  gap: clamp(3rem, 9vw, 8rem);
  align-items: end;
}

.collaboration-copy p {
  margin-top: 0;
  color: #c7d4df;
  font-size: 1.1rem;
}

.text-link {
  display: inline-flex;
  gap: 1rem;
  align-items: center;
  padding: 0.85rem 0;
  border-bottom: 2px solid var(--copper);
  font-weight: 800;
  text-decoration: none;
}

.text-link:hover,
.text-link:focus-visible {
  border-bottom-color: #fff;
}

.site-footer {
  padding: 1.8rem 0;
  background: var(--ink-deep);
  color: #aebdca;
  font-size: 0.82rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 2rem;
  align-items: center;
}

.site-footer p,
.site-footer a {
  margin: 0;
}

.site-footer a {
  padding-block: 0.25rem;
  color: #fff;
  text-decoration: none;
}

@media (max-width: 52rem) {
  .header-inner {
    min-height: auto;
    padding: 1rem 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }

  nav {
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }

  .status-card {
    max-width: 34rem;
  }

  .opening-grid,
  .section-heading-row,
  .research-intro,
  .evidence-grid,
  .ai-grid,
  .lab-grid,
  .collaboration-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .mechanism-strip {
    grid-template-columns: 1fr;
  }

  .mechanism-strip div {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid rgb(255 255 255 / 16%);
  }

  .mechanism-strip span {
    margin-bottom: 1.25rem;
  }

  .pillar-grid,
  .research-parts,
  .principle-grid {
    grid-template-columns: 1fr;
  }

  .pillar-grid li,
  .research-card,
  .principle-grid article {
    min-height: auto;
  }

  .research-proposition {
    margin-left: 0;
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
  }

  .footer-inner p:nth-child(2) {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

@media (max-width: 35rem) {
  .shell {
    width: min(calc(100% - 2rem), var(--shell));
  }

  .brand-name {
    max-width: 15rem;
  }

  nav {
    gap: 0.75rem;
  }

  nav a {
    font-size: 0.7rem;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .status-card {
    padding: 1.4rem;
  }

  .section {
    padding: 4.5rem 0;
  }

  .display-heading {
    font-size: clamp(2.45rem, 13vw, 3.5rem);
  }

  .pillar-grid {
    border-left: 0;
  }

  .pillar-grid li {
    padding-inline: 0;
    border-right: 0;
  }

  .research-card {
    padding: 2rem 1.4rem;
  }

  .card-status {
    align-items: flex-start;
    flex-direction: column;
  }

  .research-card h3 {
    margin-top: 2.5rem;
  }

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

  .principle-grid {
    border-left: 0;
  }

  .principle-grid article {
    padding-inline: 0;
    border-right: 0;
  }

  .ai-boundaries {
    grid-template-columns: 1fr;
  }

  .ai-boundaries article,
  .ai-boundaries article + article {
    padding: 1.5rem 0;
    border-left: 0;
  }

  .ai-boundaries article + article {
    border-top: 1px solid rgb(255 255 255 / 45%);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }

  .footer-inner p:nth-child(2) {
    grid-column: auto;
    grid-row: auto;
  }
}

@media (max-width: 23.5rem) {
  nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.35rem 0.75rem;
    overflow-x: visible;
  }

  nav a {
    width: 100%;
  }

  nav a:nth-child(even) {
    text-align: right;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}