:root {
  --ink: #16221d;
  --ink-soft: #52615a;
  --paper: #f3f1e9;
  --paper-deep: #e7e3d7;
  --line: #c9c9be;
  --moss: #365b46;
  --moss-dark: #1c382c;
  --lichen: #b8c58f;
  --ochre: #c88a4a;
  --clay: #a8563a;
  --night: #17231e;
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Manrope", system-ui, sans-serif;
  --shell: min(1180px, calc(100% - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  transform: translateY(-180%);
  padding: 10px 14px;
  background: #fff;
  color: var(--ink);
}

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

.page-shell,
.nav-shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid rgba(243, 241, 233, 0.16);
  color: var(--paper);
  background: var(--night);
}

.nav-shell {
  min-height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand > span:last-child {
  display: grid;
  gap: 1px;
}

.brand strong {
  font-size: 18px;
  letter-spacing: -0.02em;
}

.brand small {
  color: #aeb9b1;
  font: 10px/1.3 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: block;
  flex: 0 0 auto;
  color: var(--lichen);
}

.dodecahedron-mark,
.analysis-hexagon-mark {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.dodecahedron-mark .outer-edge,
.dodecahedron-mark .inner-edge,
.dodecahedron-mark .rear-edge,
.analysis-hexagon-mark polygon,
.analysis-hexagon-mark path {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.dodecahedron-mark .outer-edge {
  stroke-width: 1.8;
}

.dodecahedron-mark .inner-edge {
  stroke-width: 1.35;
}

.dodecahedron-mark .rear-edge {
  opacity: 0.42;
  stroke-width: 1;
}

.dodecahedron-mark .dodecahedron-face {
  fill: currentColor;
  fill-opacity: 0.07;
  stroke: none;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font: 11px var(--mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.site-header nav a {
  position: relative;
  padding: 10px 0;
  color: #c8d0cb;
  text-decoration: none;
}

.site-header nav a:hover,
.site-header nav a:focus-visible,
.site-header nav a[aria-current="page"] {
  color: #fff;
}

.site-header nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 1px;
  background: var(--lichen);
}

.hero {
  overflow: hidden;
  color: var(--paper);
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    var(--night);
  background-size: 42px 42px;
}

.hero-grid {
  min-height: 620px;
  display: grid;
  grid-template-columns: minmax(0, 820px);
  align-items: center;
  padding-block: 86px 96px;
}

.eyebrow,
.section-label,
.card-number,
.system-topline,
.investigation-list article > div > p,
.footer-bottom {
  font: 10px/1.4 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 25px;
  color: var(--lichen);
}

.eyebrow span {
  width: 26px;
  height: 1px;
  background: currentColor;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 28px;
  font-size: clamp(48px, 5.2vw, 76px);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.055em;
}

h1 em {
  color: var(--lichen);
  font-style: normal;
}

.hero-lede {
  max-width: 680px;
  margin-bottom: 32px;
  color: #c0c9c3;
  font-size: 17px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 12px 19px;
  border: 1px solid;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
}

.button-primary {
  border-color: var(--lichen);
  color: var(--night);
  background: var(--lichen);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #cad4a6;
}

.button-secondary {
  border-color: #6d7b73;
  color: #f4f3ec;
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--paper);
  background: rgba(255, 255, 255, 0.05);
}

.text-link {
  display: inline-flex;
  gap: 9px;
  color: #c4ccc7;
  font-size: 12px;
  text-underline-offset: 5px;
}

.section-pad {
  padding-block: 106px;
}

.section-intro {
  max-width: 710px;
  margin-bottom: 52px;
}

.split-intro {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.7fr);
  align-items: end;
  gap: 100px;
}

.section-label {
  margin-bottom: 16px;
  color: var(--clay);
}

.section-label.light {
  color: var(--lichen);
}

.section-intro h2,
.principles-lede h2 {
  margin-bottom: 15px;
  font-size: clamp(36px, 4vw, 55px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.section-intro > p:last-child,
.split-intro > p,
.principles-lede > p {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.process-flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  padding: 0;
  border-block: 1px solid var(--line);
  list-style: none;
}

.process-flow::before {
  content: "";
  position: absolute;
  top: 86px;
  right: 11%;
  left: 11%;
  height: 1px;
  background: var(--moss);
}

.process-flow li {
  position: relative;
  min-height: 300px;
  padding: 24px 24px 28px;
  border-right: 1px solid var(--line);
}

.process-flow li:last-child {
  border: 0;
}

.process-index {
  color: #858d87;
  font: 9px var(--mono);
}

.process-symbol {
  position: relative;
  z-index: 1;
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  margin: 35px 0 27px;
  border: 1px solid var(--moss);
  border-radius: 50%;
  color: var(--moss);
  background: var(--paper);
  font: 22px var(--mono);
}

.process-flow h3 {
  margin-bottom: 10px;
  font-size: 20px;
  font-weight: 600;
}

.process-flow p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.65;
}

.systems-section {
  color: var(--paper);
  background: var(--night);
}

.systems-section .section-intro > p:last-child,
.investigations-section .section-intro > p:last-child {
  color: #9faea5;
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.system-card {
  min-height: 460px;
  display: flex;
  flex-direction: column;
  padding: 18px 22px 22px;
  border: 1px solid #44524a;
  background: #1d2c25;
  transition: transform 180ms ease, border-color 180ms ease;
}

.system-card:hover {
  transform: translateY(-4px);
  border-color: #718078;
}

.system-topline {
  display: flex;
  justify-content: space-between;
  color: #84938a;
  letter-spacing: 0.07em;
}

.status-light::before {
  content: "";
  width: 5px;
  height: 5px;
  display: inline-block;
  margin: 0 6px 1px 0;
  border-radius: 50%;
  background: var(--lichen);
}

.system-icon {
  position: relative;
  height: 146px;
  margin: 30px 0;
  overflow: hidden;
  border-block: 1px solid #3b4a42;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 18px 18px;
}

.analysis-icon {
  display: grid;
  place-items: center;
}

.analysis-hexagon-mark {
  width: 92px;
  height: 78px;
}

.analysis-hexagon-mark polygon {
  stroke-width: 1.4;
}

.analysis-hexagon-mark path {
  opacity: 0.55;
  stroke-width: 1;
}

.atlas-icon {
  display: grid;
  grid-template-columns: repeat(2, 54px);
  place-content: center;
  gap: 5px;
}

.atlas-icon span {
  height: 45px;
  border: 1px solid #809087;
  transform: skew(-8deg);
}

.atlas-icon span:nth-child(2),
.atlas-icon span:nth-child(3) {
  border-color: var(--ochre);
  background: rgba(200, 138, 74, 0.14);
}

.education-icon {
  display: flex;
  align-items: end;
  justify-content: center;
  gap: 12px;
  padding-bottom: 23px;
}

.education-icon span {
  width: 56px;
  height: 72px;
  border: 1px solid #708078;
  border-top: 5px solid var(--lichen);
}

.education-icon span:nth-child(2) {
  height: 100px;
  border-top-color: var(--ochre);
}

.card-number {
  margin-bottom: 10px;
  color: #819087;
}

.system-card h3 {
  margin-bottom: 12px;
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.025em;
}

.system-card div > p:last-child {
  color: #aeb9b2;
  font-size: 13px;
  line-height: 1.65;
}

.system-card > a {
  display: flex;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid #46534c;
  color: var(--lichen);
  font: 11px var(--mono);
  text-decoration: none;
  text-transform: uppercase;
}

.principles-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 110px;
}

.field-note {
  max-width: 335px;
  margin-top: 55px;
  padding: 24px;
  border: 1px solid #9eaa8d;
  border-left: 5px solid var(--lichen);
  background: #e9e8dc;
  box-shadow: 9px 9px 0 #d9d7ca;
  transform: rotate(-1deg);
}

.field-note span {
  display: block;
  margin-bottom: 25px;
  color: #717b74;
  font: 9px var(--mono);
}

.field-note strong {
  font-size: 23px;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.field-note p {
  margin: 17px 0 0;
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.6;
}

.principles-list {
  border-top: 1px solid var(--line);
}

.principles-list article {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 22px;
  padding: 27px 0;
  border-bottom: 1px solid var(--line);
}

.principles-list article > span,
.audience-grid article > span {
  color: var(--clay);
  font: 9px var(--mono);
}

.principles-list h3,
.audience-grid h3 {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 600;
}

.principles-list p,
.audience-grid p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.65;
}

.audience-section {
  border-top: 1px solid var(--line);
  background: #ebe9df;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-block: 1px solid var(--line);
}

.audience-grid article {
  min-height: 215px;
  padding: 22px 20px;
  border-right: 1px solid var(--line);
}

.audience-grid article:last-child {
  border: 0;
}

.audience-grid h3 {
  margin-top: 45px;
}

.investigations-section {
  color: var(--paper);
  background: #26372f;
}

.investigation-heading {
  max-width: 760px;
}

.investigation-list {
  border-top: 1px solid #617068;
}

.investigation-list article {
  display: grid;
  grid-template-columns: 55px minmax(230px, 1fr) minmax(280px, 0.9fr) 32px;
  align-items: center;
  gap: 26px;
  padding: 30px 0;
  border-bottom: 1px solid #617068;
}

.investigation-number,
.investigation-list article > div > p {
  color: var(--lichen);
  font: 9px var(--mono);
}

.investigation-list h3 {
  margin: 6px 0 0;
  font-size: 20px;
  font-weight: 500;
}

.investigation-list article > p {
  margin: 0;
  color: #b5c0ba;
  font-size: 13px;
  line-height: 1.6;
}

.investigation-mark {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid #718078;
  border-radius: 50%;
  color: var(--lichen);
}

footer {
  padding-block: 70px 24px;
  color: #dfe4df;
  background: #101a16;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 150px 1fr;
  gap: 90px;
  padding-bottom: 55px;
}

.footer-brand {
  margin-bottom: 20px;
}

.footer-grid > div > p,
.disclaimer {
  max-width: 410px;
  color: #89978f;
  font-size: 12px;
  line-height: 1.65;
}

.footer-grid nav {
  display: grid;
  align-content: start;
  gap: 12px;
  font-size: 12px;
}

.footer-grid nav span {
  margin-bottom: 4px;
  color: #718078;
  font: 9px var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-grid nav a {
  color: #c4cdc7;
  text-decoration: none;
}

.disclaimer {
  margin: 0;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid #304038;
  color: #65756c;
  font-size: 8px;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    padding-block: 70px 82px;
  }

  .process-flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-flow::before {
    display: none;
  }

  .process-flow li:nth-child(2) {
    border-right: 0;
  }

  .process-flow li:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

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

  .system-card {
    min-height: 420px;
  }

  .principles-grid {
    gap: 60px;
  }

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

  .audience-grid article {
    border-bottom: 1px solid var(--line);
  }

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

  .investigation-list article {
    grid-template-columns: 45px 1fr 32px;
  }

  .investigation-list article > p {
    grid-column: 2;
  }

  .investigation-mark {
    grid-column: 3;
    grid-row: 1 / 3;
  }
}

@media (max-width: 720px) {
  :root {
    --shell: min(100% - 28px, 1180px);
  }

  .nav-shell {
    min-height: 118px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
  }

  .site-header nav {
    width: 100%;
    gap: 18px;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 3px;
    scrollbar-width: thin;
  }

  .site-header nav a {
    font-size: 9px;
  }

  h1 {
    font-size: clamp(42px, 13vw, 58px);
  }

  .hero-grid {
    padding-block: 58px 70px;
  }

  .hero-lede {
    font-size: 15px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    justify-content: space-between;
  }

  .section-pad {
    padding-block: 75px;
  }

  .split-intro,
  .principles-grid,
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .process-flow {
    grid-template-columns: 1fr;
  }

  .process-flow li {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .process-flow li:nth-child(3) {
    border-bottom: 1px solid var(--line);
  }

  .process-symbol {
    margin-block: 25px 20px;
  }

  .principles-grid {
    gap: 60px;
  }

  .field-note {
    margin-top: 35px;
  }

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

  .audience-grid article,
  .audience-grid article:nth-child(2n) {
    min-height: 160px;
    border-right: 0;
  }

  .audience-grid h3 {
    margin-top: 24px;
  }

  .investigation-list article {
    grid-template-columns: 34px 1fr;
    gap: 15px;
  }

  .investigation-list article > p {
    grid-column: 2;
  }

  .investigation-mark {
    display: none;
  }

  .footer-grid {
    padding-bottom: 40px;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 9px;
  }
}

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

  .system-card {
    transition: none;
  }
}