:root {
  color-scheme: light;
  --ink: #0a0a0a;
  --paper: #ffffff;
  --line: #c9c9c9;
  --muted: #5e5e5e;
  --serif: Iowan Old Style, Baskerville, "Times New Roman", serif;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --page: min(100% - 48px, 1440px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--paper);
  font: 12px/1 var(--mono);
  transform: translateY(-150%);
}

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

.site-header,
main,
.site-footer {
  width: var(--page);
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  border-bottom: 1px solid var(--ink);
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: baseline;
  text-decoration: none;
  font: 600 15px/1 var(--mono);
  letter-spacing: -0.035em;
}

.brand-symbol {
  font-size: 21px;
  letter-spacing: -0.18em;
}

.site-header nav {
  display: flex;
  gap: clamp(18px, 3vw, 48px);
  font: 11px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header nav a,
.site-footer a,
.text-link {
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.34fr);
  min-height: min(780px, calc(100vh - 88px));
  padding: clamp(76px, 11vh, 150px) 0 42px;
  border-bottom: 1px solid var(--ink);
  overflow: hidden;
}

.hero-mark {
  position: absolute;
  top: clamp(32px, 8vh, 90px);
  right: 0;
  width: clamp(220px, 27vw, 430px);
  opacity: 0.075;
  pointer-events: none;
}

.hero-mark img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-copy {
  position: relative;
  z-index: 1;
  align-self: center;
  max-width: 1040px;
  padding-right: clamp(24px, 6vw, 96px);
}

.kicker,
.section-label,
.item-number,
.hero-index,
.field-grid span,
.principle-list span,
.site-footer {
  font-family: var(--mono);
}

.kicker {
  margin: 0 0 28px;
  font-size: 11px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 34px;
  font-family: var(--serif);
  font-size: clamp(64px, 9.2vw, 148px);
  font-weight: 400;
  letter-spacing: -0.065em;
  line-height: 0.84;
}

.lede {
  max-width: 780px;
  margin-bottom: 0;
  font-family: var(--serif);
  font-size: clamp(21px, 2vw, 31px);
  line-height: 1.24;
}

.hero-index {
  position: relative;
  z-index: 1;
  align-self: end;
  margin: 0;
  font-size: 10px;
  text-transform: uppercase;
}

.hero-index div {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}

.hero-index dt { color: var(--muted); }

.hero-index dd { margin: 0; }

.section {
  display: grid;
  grid-template-columns: minmax(150px, 0.22fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 108px);
  padding: clamp(84px, 11vw, 170px) 0;
  border-bottom: 1px solid var(--ink);
}

.section-label {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  font-size: 10px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.section-label span { color: var(--muted); }

.section-label p { margin: 0; }

.section-content { max-width: 1040px; }

h2 {
  max-width: 920px;
  margin-bottom: clamp(52px, 7vw, 104px);
  font-family: var(--serif);
  font-size: clamp(42px, 6.2vw, 94px);
  font-weight: 400;
  letter-spacing: -0.052em;
  line-height: 0.98;
}

.service-list { border-top: 1px solid var(--ink); }

.service-list article {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 20px;
  padding: 28px 0 34px;
  border-bottom: 1px solid var(--line);
}

.item-number {
  padding-top: 7px;
  color: var(--muted);
  font-size: 10px;
}

h3 {
  margin-bottom: 8px;
  font-family: var(--serif);
  font-size: clamp(25px, 2.5vw, 38px);
  font-weight: 400;
  letter-spacing: -0.025em;
}

.service-list p {
  max-width: 740px;
  margin-bottom: 0;
  color: #252525;
  font-size: 17px;
}

.section-intro,
.research-copy {
  max-width: 850px;
  font-family: var(--serif);
  font-size: clamp(21px, 2.4vw, 34px);
  line-height: 1.3;
}

.section-intro { margin-bottom: 64px; }

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0 0 24px;
  padding: 0;
  border-top: 1px solid var(--ink);
  list-style: none;
}

.field-grid li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 12px;
  padding: 22px 16px 24px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--serif);
  font-size: clamp(20px, 2vw, 29px);
}

.field-grid li:nth-child(odd) { border-right: 1px solid var(--line); }

.field-grid li:nth-child(even) { padding-left: 24px; }

.field-grid span {
  padding-top: 7px;
  color: var(--muted);
  font-size: 9px;
}

.scale-note {
  margin: 28px 0 0;
  font: 11px/1.5 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.research {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 0 0 0 100vmax var(--ink);
  clip-path: inset(0 -100vmax);
}

.research .section-label span { color: #a5a5a5; }

.research h2 { margin-bottom: 52px; }

.research-copy { margin-bottom: 54px; }

.research-copy p:last-child {
  margin-bottom: 0;
  color: #bdbdbd;
}

.text-link {
  display: inline-block;
  font: 11px/1.2 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.principles h2 { margin-bottom: 60px; }

.principle-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink);
  list-style: none;
}

.principle-list li {
  min-height: 210px;
  padding: 22px 22px 30px 0;
  border-bottom: 1px solid var(--line);
}

.principle-list li:nth-child(odd) { border-right: 1px solid var(--line); }

.principle-list li:nth-child(even) { padding-left: 24px; }

.principle-list span {
  color: var(--muted);
  font-size: 9px;
}

.principle-list p {
  max-width: 360px;
  margin: 60px 0 0;
  font-family: var(--serif);
  font-size: clamp(26px, 3vw, 46px);
  letter-spacing: -0.035em;
  line-height: 1.02;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 24px;
  align-items: end;
  padding: 34px 0 42px;
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-brand {
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.footer-brand span {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.18em;
}

.site-footer p { margin-bottom: 0; }

.not-found {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  padding: 48px 0;
}

.not-found h1 { max-width: 900px; }

@media (max-width: 840px) {
  :root { --page: min(100% - 32px, 1440px); }

  .site-header { min-height: 72px; }

  .site-header nav { gap: 16px; }

  .hero {
    grid-template-columns: 1fr;
    min-height: calc(100svh - 72px);
    padding-top: 96px;
  }

  .hero-copy {
    align-self: start;
    padding-right: 0;
  }

  .hero-index {
    width: min(100%, 420px);
    margin-top: 72px;
  }

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

  .section-label {
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line);
  }

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

  .site-footer > p { display: none; }
}

@media (max-width: 560px) {
  .site-header nav a:nth-child(2) { display: none; }

  h1 { font-size: clamp(55px, 17vw, 82px); }

  .lede { font-size: 20px; }

  .hero-mark {
    right: -80px;
    width: 280px;
  }

  .service-list article { grid-template-columns: 56px minmax(0, 1fr); }

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

  .field-grid li:nth-child(odd),
  .principle-list li:nth-child(odd) { border-right: 0; }

  .field-grid li:nth-child(even),
  .principle-list li:nth-child(even) { padding-left: 0; }

  .principle-list li { min-height: 170px; }

  .principle-list p { margin-top: 42px; }
}

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

@media print {
  .site-header nav,
  .skip-link,
  .site-footer a { display: none; }

  .hero { min-height: auto; }

  .section { break-inside: avoid; }
}