:root {
  --background: #0a0c10;
  --text: #f1f2f4;
  --muted: #a0a5af;
  --quiet: #6f7580;
  --rule: #282c34;
  --rule-strong: #3a3f48;
  color-scheme: dark;
  font-family: "Geist", "Helvetica Neue", Arial, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* { box-sizing: border-box; }

html {
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--background);
  color: var(--text);
}

body, a { font: inherit; }

a {
  color: inherit;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}

a:hover { color: #fff; }

a:focus-visible {
  border-radius: 2px;
  outline: 1px solid #fff;
  outline-offset: 5px;
}

::selection {
  background: #63718a;
  color: #fff;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 9px 13px;
  background: #fff;
  color: #080a0e;
  transform: translateY(-160%);
}

.skip-link:focus { transform: none; }

.shell {
  width: min(100%, 1328px);
  margin-inline: auto;
  padding-inline: 32px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: 24px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 92px;
  border-bottom: 1px solid var(--rule);
}

.identity {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  font-size: 14px;
  letter-spacing: -0.015em;
  text-decoration: none;
}

.identity img {
  display: block;
  width: 31px;
  height: auto;
}

.page-nav {
  display: flex;
  gap: 24px;
}

.page-nav a {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.page-nav a[aria-current="page"] { color: var(--text); }

.page-hero {
  padding-top: 128px;
  padding-bottom: 126px;
}

.page-label,
.section-label {
  grid-column: 1 / 3;
  margin: 10px 0 0;
  color: var(--quiet);
  font-size: 13px;
}

.page-intro {
  grid-column: 4 / 12;
}

.page-intro h1 {
  margin: 0;
  font-size: clamp(68px, 8vw, 112px);
  font-weight: 300;
  line-height: 0.94;
  letter-spacing: -0.068em;
}

.page-dek {
  max-width: 820px;
  margin: 46px 0 0;
  color: #d9dce2;
  font-size: clamp(25px, 3vw, 37px);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: -0.038em;
  text-wrap: balance;
}

.content-section {
  padding-top: 100px;
  padding-bottom: 110px;
  border-top: 1px solid var(--rule);
}

.section-body {
  grid-column: 4 / 10;
  max-width: 680px;
}

.section-body h2 {
  margin: 0 0 40px;
  font-size: clamp(38px, 4vw, 54px);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.section-body h3 {
  margin: 45px 0 12px;
  color: #e3e5e9;
  font-size: 18px;
  font-weight: 400;
  letter-spacing: -0.02em;
}

.section-body p {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.68;
  letter-spacing: -0.008em;
}

.section-body .lead {
  margin-bottom: 30px;
  color: #e6e8eb;
  font-size: 23px;
  font-weight: 300;
  line-height: 1.48;
  letter-spacing: -0.025em;
}

.wide-body {
  grid-column: 4 / 13;
  margin-top: 66px;
}

.people-list,
.research-list,
.contact-list {
  border-top: 1px solid var(--rule-strong);
}

.person-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr 0.8fr;
  gap: 32px;
  align-items: baseline;
  padding: 27px 0 30px;
  border-bottom: 1px solid var(--rule);
}

.person-row h3,
.person-row p { margin: 0; }

.person-row h3 {
  font-size: 19px;
  font-weight: 400;
  letter-spacing: -0.022em;
}

.person-row p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.person-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.person-links a,
.research-links a {
  color: #d6d9df;
  text-decoration-color: var(--rule-strong);
}

.contact-list {
  margin: 50px 0 0;
  padding: 0;
}

.contact-list div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 15px 0 16px;
  border-bottom: 1px solid var(--rule);
}

.contact-list dt,
.contact-list dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
}

.contact-list dt { color: var(--quiet); }
.contact-list dd { color: #dfe2e7; }

.research-list { grid-column: 4 / 13; }

.research-row {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr) 190px;
  gap: 44px;
  padding: 35px 0 40px;
  border-bottom: 1px solid var(--rule);
}

.research-date {
  margin: 3px 0 0;
  color: var(--quiet);
  font-size: 13px;
}

.research-copy h2,
.research-copy p { margin: 0; }

.research-copy h2 {
  font-size: 30px;
  font-weight: 300;
  letter-spacing: -0.04em;
}

.research-copy h2 a { text-decoration: none; }

.research-copy p {
  max-width: 620px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.research-links {
  display: flex;
  flex-direction: column;
  gap: 9px;
  align-items: flex-start;
  font-size: 13px;
}

.standards {
  padding-top: 80px;
  padding-bottom: 100px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 140px;
  border-top: 1px solid var(--rule);
  color: var(--quiet);
  font-size: 13px;
}

.site-footer nav {
  display: flex;
  gap: 28px;
}

.site-footer nav a { text-decoration-color: var(--rule-strong); }

.error-main {
  display: grid;
  min-height: calc(100vh - 233px);
  min-height: calc(100svh - 233px);
  place-items: center;
  padding-block: 80px;
}

.error-copy {
  width: min(100%, 680px);
}

.error-code {
  margin: 0 0 24px;
  color: var(--quiet);
  font-size: 13px;
}

.error-copy h1 {
  margin: 0;
  font-size: clamp(54px, 7vw, 92px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.06em;
}

.error-copy > p:not(.error-code) {
  max-width: 540px;
  margin: 36px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.6;
}

.error-links {
  display: flex;
  gap: 24px;
  margin-top: 38px;
  font-size: 14px;
}

@media (max-width: 900px) {
  .shell { padding-inline: 24px; }
  .grid { column-gap: 18px; }

  .page-label,
  .section-label { grid-column: 1 / 4; }

  .page-intro,
  .section-body,
  .wide-body,
  .research-list { grid-column: 4 / 13; }

  .research-row {
    grid-template-columns: 110px minmax(0, 1fr);
  }

  .research-links {
    grid-column: 2;
    flex-direction: row;
  }
}

@media (max-width: 680px) {
  .shell { padding-inline: 20px; }
  .grid { display: block; }
  .site-header { height: 74px; }

  .identity {
    gap: 10px;
    font-size: 13px;
  }

  .identity img { width: 27px; }
  .page-nav { gap: 15px; }
  .page-nav a { font-size: 13px; }

  .page-hero {
    padding-top: 74px;
    padding-bottom: 86px;
  }

  .page-label,
  .section-label { margin: 0 0 34px; }

  .page-intro h1 { font-size: clamp(56px, 17vw, 76px); }

  .page-dek {
    margin-top: 34px;
    font-size: 25px;
  }

  .content-section {
    padding-top: 76px;
    padding-bottom: 84px;
  }

  .section-body h2 {
    margin-bottom: 31px;
    font-size: 39px;
  }

  .section-body p {
    font-size: 16px;
    line-height: 1.65;
  }

  .section-body .lead {
    font-size: 21px;
    line-height: 1.45;
  }

  .wide-body { margin-top: 52px; }

  .person-row,
  .research-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .research-links {
    grid-column: auto;
    flex-direction: row;
  }

  .site-footer {
    gap: 20px;
    min-height: 120px;
  }

  .site-footer nav { gap: 18px; }
}

@media (max-width: 370px) {
  .shell { padding-inline: 16px; }
  .identity span { display: none; }
  .page-nav { gap: 12px; }
  .page-nav a { font-size: 12px; }

  .contact-list div {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}

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