:root {
  --paper: #f3f0e8;
  --paper-warm: #ebe6da;
  --paper-deep: #ded8ca;
  --ink: #171713;
  --muted: #6d6b64;
  --line: rgba(23, 23, 19, .16);
  --bronze: #8b6547;
  --bronze-soft: #a88362;
  --river: #5f6d67;
  --river-light: #839087;
  --serif: "Newsreader", Georgia, serif;
  --sans: "Inter", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; }

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 100;
}

.progress span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--bronze);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 4vw;
  opacity: 0;
  pointer-events: none;
  transition: opacity 700ms ease;
}

.site-header.visible {
  opacity: 1;
  pointer-events: auto;
}

.wordmark,
nav a {
  text-decoration: none;
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.wordmark { font-weight: 600; }

nav {
  display: flex;
  gap: 26px;
}

nav a {
  color: var(--muted);
  letter-spacing: .06em;
  text-transform: none;
}

.river-layer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(15vw, 190px);
  height: 100vh;
  z-index: 12;
  pointer-events: none;
  opacity: .46;
  mix-blend-mode: multiply;
}

.river-layer svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.river-layer path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 3000;
  stroke-dashoffset: 3000;
}

#river-1 { stroke: var(--river); stroke-width: 1.6; }
#river-2 { stroke: var(--bronze-soft); stroke-width: 1.2; }
#river-3 { stroke: var(--river-light); stroke-width: 1.15; }
#river-4 { stroke: var(--bronze); stroke-width: 1.0; }

.room {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  padding: 18vh 8vw;
}

.room-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.prose-narrow {
  width: min(760px, 100%);
}

.room-arrival {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding-top: 10vh;
}

.arrival-inner {
  text-align: center;
  width: min(1100px, 100%);
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--bronze);
  font-size: .72rem;
  letter-spacing: .19em;
  text-transform: uppercase;
  font-weight: 600;
}

h1, h2, h3,
.display-question,
.arrival-line,
.axiom,
.return-line,
.last-words,
.emergence-statement {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -.035em;
}

h1 {
  margin: 0;
  font-size: clamp(5.5rem, 15vw, 12rem);
  line-height: .84;
}

.arrival-line {
  max-width: 760px;
  margin: 50px auto 0;
  font-size: clamp(2rem, 4.5vw, 4.5rem);
  line-height: 1.06;
}

.full-moment {
  min-height: 78vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.display-question {
  max-width: 1000px;
  margin: 0;
  font-size: clamp(3.5rem, 8vw, 8rem);
  line-height: .98;
}

.secondary-line {
  max-width: 760px;
  margin: 36px 0 0;
  color: var(--muted);
  font-family: var(--serif);
  font-size: clamp(1.55rem, 3vw, 2.7rem);
  line-height: 1.25;
}

.room-recognition {
  background: var(--paper);
}

.recognition-sequence {
  padding: 10vh 0;
}

.recognition-line {
  margin: 0 0 18vh;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.18;
}

.indent-one { transform: translateX(8vw); }
.indent-two { transform: translateX(4vw); }

.room-threshold {
  margin: 18vh auto 0;
  max-width: 850px;
  padding-top: 8vh;
  border-top: 1px solid var(--line);
}

.room-threshold p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.18;
}

.room-pattern {
  background: var(--paper-warm);
}

.axiom {
  min-height: 100vh;
  display: grid;
  place-items: center;
  max-width: 1120px;
  margin: 0 auto;
}

.axiom p {
  margin: 0;
  font-size: clamp(4rem, 8vw, 9rem);
  line-height: .99;
}

.pattern-notes {
  margin: 0 auto;
  padding: 12vh 0;
  font-size: 1.12rem;
  color: var(--muted);
}

.pattern-notes p { margin: 0 0 20px; }

.field-note {
  width: min(720px, 100%);
  margin: 16vh auto;
  padding: 40px 0 40px 28px;
  border-left: 2px solid var(--bronze);
}

.field-note span {
  display: block;
  margin-bottom: 16px;
  color: var(--bronze);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.field-note p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.22;
}

.room-confluence {
  background: var(--paper);
}

.confluence-title {
  min-height: 70vh;
  display: grid;
  align-content: center;
}

.confluence-title h2 {
  margin: 0;
  font-size: clamp(5rem, 13vw, 11rem);
  line-height: .85;
}

.confluence-title p {
  margin: 24px 0 0;
  color: var(--bronze);
  letter-spacing: .14em;
  text-transform: uppercase;
  font-size: .72rem;
}

.definition {
  max-width: 1000px;
  margin: 8vh 0 18vh;
}

.definition > p:first-child {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3rem, 6vw, 6.5rem);
  line-height: 1;
}

.definition-sub {
  max-width: 720px;
  margin: 42px 0 0;
  color: var(--muted);
  font-size: 1.1rem;
}

.three-movements {
  border-top: 1px solid var(--line);
}

.movement {
  min-height: 70vh;
  display: grid;
  align-content: center;
  border-bottom: 1px solid var(--line);
}

.movement span,
.practice-step span,
.commitments span {
  color: var(--bronze);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.movement h3 {
  max-width: 950px;
  margin: 24px 0 0;
  font-size: clamp(3rem, 7vw, 7.5rem);
  line-height: .98;
}

.room-practice {
  background: var(--paper-deep);
}

.practice-sequence {
  border-top: 1px solid var(--line);
}

.practice-step {
  min-height: 65vh;
  display: grid;
  align-content: center;
  grid-template-columns: 90px 1fr;
  grid-template-areas:
    "num title"
    ". text";
  column-gap: 30px;
  border-bottom: 1px solid var(--line);
}

.practice-step span { grid-area: num; }

.practice-step h3 {
  grid-area: title;
  margin: 0;
  font-size: clamp(4rem, 10vw, 10rem);
  line-height: .88;
}

.practice-step p {
  grid-area: text;
  max-width: 660px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.wide-note {
  width: min(900px, 100%);
}

.room-emergence {
  background: var(--river);
  color: var(--paper);
}

.room-emergence .secondary-line,
.room-emergence .room-threshold,
.room-emergence .fingerprints {
  color: rgba(243,240,232,.78);
}

.room-emergence .room-threshold {
  border-top-color: rgba(243,240,232,.2);
}

.emergence-words {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
  max-width: 980px;
  padding: 12vh 0 6vh;
}

.emergence-words span {
  font-family: var(--serif);
  font-size: clamp(2.5rem, 6vw, 6rem);
  opacity: .75;
}

.emergence-statement {
  min-height: 65vh;
  display: grid;
  align-items: center;
}

.emergence-statement p {
  margin: 0;
  font-size: clamp(5rem, 14vw, 13rem);
  line-height: .8;
}

.fingerprints {
  max-width: 760px;
  margin-left: auto;
  padding: 12vh 0;
}

.fingerprints p {
  margin: 0 0 30px;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.2vw, 3rem);
  line-height: 1.22;
}

.question-block {
  min-height: 80vh;
  display: grid;
  align-items: center;
}

.question-block p {
  max-width: 1000px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3.5rem, 8vw, 8rem);
  line-height: .98;
}

.room-commons {
  background: var(--paper-warm);
}

.commons-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.commons-grid p {
  margin: 0;
  min-height: 220px;
  display: grid;
  align-items: end;
  padding: 34px;
  background: var(--paper-warm);
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3.5vw, 3.4rem);
  line-height: 1.15;
}

.institute-reveal {
  max-width: 1050px;
  margin: 20vh 0 12vh;
}

.institute-reveal h2 {
  margin: 0;
  font-size: clamp(3.8rem, 8vw, 8rem);
  line-height: .96;
}

.institute-reveal > p:last-child {
  max-width: 720px;
  margin: 40px 0 0;
  color: var(--muted);
  font-size: 1.1rem;
}

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

.commitments article {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 20px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.commitments p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.2;
}

.room-continue {
  background: var(--paper);
  min-height: 180vh;
}

.return-line {
  min-height: 90vh;
  display: grid;
  place-items: center;
  text-align: center;
}

.return-line p {
  max-width: 1150px;
  margin: 0;
  font-size: clamp(4rem, 10vw, 10rem);
  line-height: .96;
}

.final-reflection {
  max-width: 760px;
  margin: 12vh auto 24vh;
}

.final-reflection p {
  margin: 0 0 38px;
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3.5vw, 3.4rem);
  line-height: 1.22;
}

.commons-paths {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.commons-paths a {
  min-height: 250px;
  padding: 34px;
  text-decoration: none;
  transition: background 300ms ease;
}

.commons-paths a + a {
  border-left: 1px solid var(--line);
}

.commons-paths a:hover {
  background: var(--paper-warm);
}

.commons-paths span {
  color: var(--bronze);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.commons-paths p {
  margin: 80px 0 0;
  font-family: var(--serif);
  font-size: 2rem;
  line-height: 1.15;
}

.last-words {
  min-height: 90vh;
  display: grid;
  place-items: center;
  text-align: center;
}

.last-words p {
  margin: 0;
  font-size: clamp(4rem, 11vw, 11rem);
  line-height: .9;
}

footer {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 4vw;
  border-top: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  font-size: .72rem;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 900ms ease, transform 900ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  body { font-size: 17px; }

  .site-header {
    padding: 20px 22px;
  }

  nav { display: none; }

  .river-layer {
    width: 48px;
    opacity: .26;
  }

  .room {
    padding: 15vh 24px;
  }

  .indent-one,
  .indent-two {
    transform: none;
  }

  .practice-step {
    grid-template-columns: 48px 1fr;
  }

  .commons-grid,
  .commons-paths {
    grid-template-columns: 1fr;
  }

  .commons-grid p {
    min-height: 150px;
  }

  .commons-paths a + a {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  footer {
    flex-direction: column;
    padding: 26px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}


.room-laboratory {
  background: var(--paper-deep);
}

.laboratory-intro {
  max-width: 980px;
  margin-bottom: 14vh;
}

.laboratory-intro h2 {
  margin: 0;
  font-size: clamp(3.8rem, 8vw, 8rem);
  line-height: .96;
}

.laboratory-intro > p:last-child {
  max-width: 720px;
  margin: 42px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.demonstration-link {
  display: grid;
  grid-template-columns: 180px 1fr auto;
  gap: 34px;
  align-items: center;
  padding: 42px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.demonstration-link h3 {
  margin: 0;
  font-size: clamp(2.2rem, 4.5vw, 4.8rem);
  line-height: 1;
}

.demonstration-link p {
  margin: 16px 0 0;
  color: var(--muted);
}

.demonstration-number {
  color: var(--bronze);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.demonstration-arrow {
  font-family: var(--serif);
  font-size: 2.2rem;
  transition: transform 240ms ease;
}

.demonstration-link:hover .demonstration-arrow {
  transform: translate(5px, -5px);
}

@media (max-width: 900px) {
  .demonstration-link {
    grid-template-columns: 1fr auto;
    gap: 20px;
  }

  .demonstration-number {
    grid-column: 1 / -1;
  }
}