:root {
  --paper: #f0eee7;
  --ink: #11110f;
  --muted: #6d6b63;
  --line: rgba(17, 17, 15, 0.16);
  --line-strong: rgba(17, 17, 15, 0.42);
  --wash: rgba(255, 255, 255, 0.32);
  --warm: #d7d0bf;
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.45;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(17,17,15,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17,17,15,.025) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(to bottom, black, transparent 78vh);
  z-index: -2;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .12;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
  z-index: 20;
}

a { color: inherit; }
button, input { font: inherit; }
button { color: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(240, 238, 231, .86);
  backdrop-filter: blur(16px);
}

.wordmark {
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
}
.wordmark-dot { opacity: .35; margin: 0 .12em; }
.site-header nav { display: flex; gap: 22px; }
.site-header nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 13px;
}
.site-header nav a:hover { color: var(--ink); }

.section-shell {
  width: min(1500px, calc(100vw - 56px));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 69px);
  display: grid;
  grid-template-columns: minmax(320px, .82fr) minmax(520px, 1.18fr);
  grid-template-rows: 1fr auto;
  gap: 28px 48px;
  align-items: center;
  padding: 54px 0 28px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.hero h1,
.section-heading h2,
.about h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  letter-spacing: -.045em;
}
.hero h1 {
  max-width: 790px;
  font-size: clamp(54px, 6.4vw, 104px);
  line-height: .92;
}
.lede {
  max-width: 610px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 1.6vw, 25px);
  line-height: 1.28;
}

.hero-field {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.14);
}
.hero-field svg { display: block; width: 100%; height: auto; }
.plan-lines path,
.stage-grid path,
.room-outline,
.room-outline-line {
  fill: none;
  stroke: rgba(17,17,15,.42);
  stroke-width: 1.3;
  vector-effect: non-scaling-stroke;
}
.plan-lines .door { stroke-dasharray: 5 4; opacity: .5; }
.furniture rect,
.furniture circle {
  fill: rgba(17,17,15,.04);
  stroke: rgba(17,17,15,.22);
  stroke-width: 1;
}
.movement-paths path {
  fill: none;
  stroke: rgba(17,17,15,.15);
  stroke-width: 1;
  stroke-dasharray: 4 6;
}
.person .aura {
  fill: rgba(17,17,15,.055);
  stroke: rgba(17,17,15,.16);
  stroke-width: 1;
}
.person .dot { fill: var(--ink); }
.svg-note {
  fill: rgba(17,17,15,.52);
  font: 9px ui-sans-serif, sans-serif;
  letter-spacing: .11em;
}

.person-a { animation: roamA 13s ease-in-out infinite alternate; }
.person-b { animation: roamB 15s ease-in-out infinite alternate; }
.person-c { animation: roamC 17s ease-in-out infinite alternate; }
@keyframes roamA {
  0% { transform: translate(104px,380px); }
  45% { transform: translate(360px,261px); }
  100% { transform: translate(648px,244px); }
}
@keyframes roamB {
  0% { transform: translate(128px,151px); }
  48% { transform: translate(374px,205px); }
  100% { transform: translate(626px,375px); }
}
@keyframes roamC {
  0% { transform: translate(382px,404px); }
  52% { transform: translate(395px,237px); }
  100% { transform: translate(432px,109px); }
}

.hero-index {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.hero-index span { padding-top: 14px; }

.experiments,
.principles,
.about { padding: 120px 0; }

.section-heading {
  display: grid;
  grid-template-columns: .5fr 1.5fr;
  gap: 28px;
  align-items: start;
  margin-bottom: 60px;
}
.section-heading h2 {
  max-width: 980px;
  font-size: clamp(42px, 5vw, 82px);
  line-height: .98;
}

.experiment-card {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  min-height: 620px;
  margin-top: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255,255,255,.12);
}
.experiment-card.reverse { grid-template-columns: 1.28fr .72fr; }
.experiment-card.reverse .experiment-copy { order: 2; border-right: 0; border-left: 1px solid var(--line); }
.experiment-card.reverse .experiment-stage { order: 1; }
.experiment-copy {
  display: flex;
  flex-direction: column;
  padding: 34px;
  border-right: 1px solid var(--line);
}
.experiment-number {
  margin: 0 0 auto;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .12em;
}
.experiment-copy h3 {
  margin: 64px 0 16px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(38px, 4vw, 68px);
  line-height: .98;
  font-weight: 400;
  letter-spacing: -.035em;
}
.experiment-copy > p:not(.experiment-number):not(.metric) {
  max-width: 520px;
  margin: 0 0 40px;
  color: var(--muted);
  font-size: 18px;
}
.experiment-copy label {
  display: flex;
  justify-content: space-between;
  margin-top: auto;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .04em;
}
input[type="range"] {
  width: 100%;
  accent-color: var(--ink);
}
.metric {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.metric span { font-weight: 700; }

.experiment-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  padding: 38px;
  background: rgba(255,255,255,.08);
}
.experiment-stage svg { width: 100%; height: auto; }

.proxemic-aura {
  fill: rgba(17,17,15,.045);
  stroke: rgba(17,17,15,.15);
  stroke-width: 1;
}
.proxemic-dot { fill: var(--ink); }
.proxemic-aura.hot {
  fill: rgba(17,17,15,.11);
  stroke: rgba(17,17,15,.42);
}
.stage-grid path { stroke: rgba(17,17,15,.14); }

.segmented {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: auto;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  overflow: hidden;
}
.segmented button {
  border: 0;
  border-right: 1px solid var(--line-strong);
  background: transparent;
  padding: 9px 11px;
  cursor: pointer;
  font-size: 12px;
}
.segmented button:last-child { border-right: 0; }
.segmented button.active { background: var(--ink); color: var(--paper); }

.cafe-wall { fill: none; stroke: rgba(17,17,15,.36); stroke-width: 1.2; }
.cafe-table { fill: rgba(17,17,15,.06); stroke: rgba(17,17,15,.25); stroke-width: 1; }
.cafe-chair { fill: var(--ink); opacity: .82; }
.cafe-social { fill: none; stroke: rgba(17,17,15,.16); stroke-width: 1; stroke-dasharray: 4 5; }

.room-people circle { fill: var(--ink); }
.translucent-wall { fill: rgba(17,17,15,.24); transition: opacity .25s ease; }
.sight-lines path { fill: none; stroke: rgba(17,17,15,.16); stroke-width: 1; stroke-dasharray: 3 5; }

.text-button {
  align-self: flex-start;
  margin-top: auto;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  padding: 10px 15px;
  cursor: pointer;
}
.text-button:hover { background: var(--ink); color: var(--paper); }
.object {
  fill: rgba(17,17,15,.08);
  stroke: rgba(17,17,15,.35);
  stroke-width: 1.2;
  transition: transform .7s cubic-bezier(.22,1,.36,1), fill .4s ease;
}
.stairs { fill: none; }
.wrong-person {
  fill: var(--ink);
  transition: transform .7s cubic-bezier(.22,1,.36,1);
}
.wrong-use-stage.appropriated .bench { transform: rotate(-9deg) translate(-10px, 18px); transform-origin: 186px 288px; fill: rgba(17,17,15,.16); }
.wrong-use-stage.appropriated .plinth { transform: translate(-120px, 38px); fill: rgba(17,17,15,.16); }
.wrong-use-stage.appropriated .stairs { transform: translate(38px,-10px) rotate(3deg); }
.wrong-use-stage.appropriated .p1 { transform: translate(190px,-11px); }
.wrong-use-stage.appropriated .p2 { transform: translate(-265px,72px); }
.wrong-use-stage.appropriated .p3 { transform: translate(115px,39px); }

.trajectory-card {
  display: block;
  min-height: 0;
  padding: 34px;
}
.trajectory-card .experiment-copy {
  display: grid;
  grid-template-columns: 80px .6fr 1.2fr;
  gap: 18px 32px;
  padding: 0 0 48px;
  border: 0;
}
.trajectory-card .experiment-number { margin: 0; }
.trajectory-card .experiment-copy h3 { margin: 0; }
.trajectory-card .experiment-copy > p:not(.experiment-number) { margin: 0; }
.trajectory-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}
.trajectory-step {
  position: relative;
  min-height: 150px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  padding: 18px;
  text-align: left;
  cursor: pointer;
}
.trajectory-step:last-child { border-right: 0; }
.trajectory-step span {
  display: block;
  margin-bottom: 60px;
  color: var(--muted);
  font-size: 10px;
}
.trajectory-step.active { background: var(--ink); color: var(--paper); }
.trajectory-step.active span { color: rgba(240,238,231,.55); }
.trajectory-note {
  min-height: 94px;
  padding: 24px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(24px, 2.8vw, 44px);
  letter-spacing: -.02em;
}

.principles { border-top: 1px solid var(--line); }
.principle-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-strong);
}
.principle-grid article {
  min-height: 360px;
  padding: 20px;
  border-right: 1px solid var(--line);
}
.principle-grid article:last-child { border-right: 0; }
.principle-grid span {
  color: var(--muted);
  font-size: 10px;
}
.principle-grid h3 {
  margin: 100px 0 16px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 28px;
  font-weight: 400;
  line-height: 1.05;
}
.principle-grid p { margin: 0; color: var(--muted); font-size: 14px; }

.about { border-top: 1px solid var(--line); }
.about-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 70px;
}
.about h2 {
  max-width: 900px;
  font-size: clamp(44px, 5vw, 80px);
  line-height: .98;
}
.about-grid > div { max-width: 560px; color: var(--muted); font-size: 18px; }
.about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
}
.about-links a { color: var(--ink); text-underline-offset: 3px; }

.site-footer {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  gap: 20px;
  padding: 24px 0 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .04em;
  text-transform: uppercase;
}

@media (max-width: 980px) {
  .site-header { padding: 0 18px; }
  .site-header nav { display: none; }
  .section-shell { width: min(100% - 36px, 1500px); }
  .hero {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    padding-top: 60px;
  }
  .hero-field { margin-top: 20px; }
  .hero-index { grid-template-columns: repeat(2, 1fr); gap: 10px 20px; }
  .section-heading { grid-template-columns: 1fr; }
  .experiment-card,
  .experiment-card.reverse { grid-template-columns: 1fr; }
  .experiment-card.reverse .experiment-copy { order: 1; border-left: 0; border-bottom: 1px solid var(--line); }
  .experiment-card.reverse .experiment-stage { order: 2; }
  .experiment-copy { min-height: 470px; border-right: 0; border-bottom: 1px solid var(--line); }
  .experiment-stage { min-height: 420px; }
  .trajectory-card .experiment-copy { grid-template-columns: 1fr; }
  .trajectory-strip { grid-template-columns: repeat(3, 1fr); }
  .trajectory-step { border-bottom: 1px solid var(--line); }
  .principle-grid { grid-template-columns: repeat(2, 1fr); }
  .principle-grid article:nth-child(2) { border-right: 0; }
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .hero h1 { font-size: clamp(50px, 16vw, 76px); }
  .hero { min-height: auto; padding-bottom: 70px; }
  .hero-field svg { min-width: 620px; transform: translateX(-10%); }
  .experiments, .principles, .about { padding: 84px 0; }
  .experiment-copy, .trajectory-card { padding: 24px; }
  .experiment-copy h3 { margin-top: 52px; }
  .experiment-stage { min-height: 330px; padding: 18px; }
  .segmented { grid-template-columns: 1fr; border-radius: 16px; }
  .segmented button { border-right: 0; border-bottom: 1px solid var(--line-strong); }
  .segmented button:last-child { border-bottom: 0; }
  .trajectory-strip { grid-template-columns: repeat(2, 1fr); }
  .principle-grid { grid-template-columns: 1fr; }
  .principle-grid article { border-right: 0; border-bottom: 1px solid var(--line); min-height: 300px; }
  .site-footer { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .person-a, .person-b, .person-c { animation: none; }
  .person-a { transform: translate(104px,380px); }
  .person-b { transform: translate(374px,205px); }
  .person-c { transform: translate(432px,109px); }
}