:root {
  --paper: #efeae0;
  --paper-2: #e6dfd1;
  --ink: #161513;
  --ink-soft: #3a3731;
  --muted: #7a7468;
  --line: rgba(22, 21, 19, 0.12);
  --trace: #3f5e56;
  --trace-2: #8b5a3c;
  --dark: #0e0e0c;
  --on-dark: #efeae0;
  --serif: "Instrument Serif", "Iowan Old Style", "Palatino Linotype", serif;
  --sans: "Instrument Sans", "Gill Sans", "Trebuchet MS", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --top: 4.5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.125rem;
  line-height: 1.65;
  letter-spacing: -0.011em;
  font-weight: 400;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  transition: background 0.7s var(--ease), color 0.7s var(--ease);
}

body.is-break {
  background: var(--dark);
  color: var(--on-dark);
}

body.is-break .top .wordmark,
body.is-break .top .top-link {
  color: var(--on-dark);
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 0.8rem;
  z-index: 20;
}

.skip:focus {
  top: 1rem;
}

#engram {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.grain,
.vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.grain {
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

.vignette {
  background: radial-gradient(ellipse at center, transparent 45%, rgba(22, 21, 19, 0.08) 100%);
}

body.is-break .grain {
  mix-blend-mode: overlay;
  opacity: 0.12;
}

body.is-break .vignette {
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0, 0, 0, 0.45) 100%);
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 1px;
  width: 0;
  background: var(--trace);
  z-index: 12;
  pointer-events: none;
}

body.is-break .progress {
  background: var(--on-dark);
}

.top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.35rem 2rem;
  pointer-events: none;
}

.top a {
  pointer-events: auto;
  text-decoration: none;
  color: var(--ink);
  transition: color 0.5s var(--ease), opacity 0.5s var(--ease);
}

.wordmark {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.top-link {
  font-size: 0.85rem;
  font-weight: 500;
}

.top-link:hover,
.wordmark:hover {
  opacity: 0.55;
}

main {
  position: relative;
  z-index: 2;
}

.scene {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18vh 8vw 16vh;
}

.scene-ask {
  min-height: 100vh;
}

.scene-forget,
.scene-idea,
.scene-begin,
.scene-unlock {
  min-height: 100vh;
}

.scene-fragments {
  min-height: 130vh;
}

.scene-think {
  display: block;
  min-height: 260vh;
  align-items: stretch;
  padding: 0;
}

.scene-cancer {
  min-height: 160vh;
}

.hero-inner,
.copy-center,
.close-inner,
.break-inner {
  text-align: center;
  max-width: 52rem;
}

.copy {
  max-width: 36rem;
}

.copy-narrow {
  max-width: 34rem;
}

.copy-center-text {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.kicker {
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--muted);
  margin: 0 0 1.4rem;
}

h1,
h2 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0;
}

h1 {
  font-size: clamp(2.7rem, 7.4vw, 5.6rem);
}

h2 {
  font-size: clamp(2rem, 4.6vw, 3.35rem);
}

.huge {
  font-size: clamp(3.1rem, 9vw, 7.4rem);
  line-height: 0.98;
  text-align: center;
}

.lede,
.subtitle {
  margin: 1.6rem 0 0;
  color: var(--ink-soft);
  font-size: 1.15rem;
}

.scroll-hint {
  margin-top: 4.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
}

.scroll-arrow {
  display: block;
  animation: bob 2.4s var(--ease) infinite;
}

@keyframes bob {
  0%,
  100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  50% {
    transform: translateY(8px);
    opacity: 1;
  }
}

.statement {
  font-family: var(--serif);
  font-size: clamp(1.7rem, 3.4vw, 2.55rem);
  line-height: 1.22;
  letter-spacing: -0.03em;
  margin: 0 0 1.8rem;
}

p {
  margin: 0 0 1.15rem;
  color: var(--ink-soft);
}

.copy h2 + p {
  margin-top: 1.6rem;
}

.quiet-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
}

.quiet-list li {
  margin: 0 0 0.7rem;
  color: var(--ink);
}

.emphasis {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  margin-top: 1.8rem;
}

.fragments {
  position: absolute;
  inset: 12vh 6vw;
  pointer-events: none;
}

.fragments span {
  position: absolute;
  font-size: 0.88rem;
  letter-spacing: 0.03em;
  color: var(--ink);
  opacity: 0.18;
  white-space: nowrap;
  transition: opacity 0.6s var(--ease), transform 0.8s var(--ease);
}

.scene-fragments.is-on .fragments span {
  opacity: 0.92;
}

.scene-fragments.is-linked .fragments span {
  opacity: 1;
}

.fragments-caption {
  position: relative;
  z-index: 2;
  margin-top: 55vh;
  text-align: center;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.begin-title {
  margin: 0 0 1.8rem;
  font-size: clamp(2.1rem, 5vw, 3.4rem);
}

.bridge {
  font-size: 1.05rem;
  color: rgba(239, 234, 224, 0.62);
  margin-bottom: 2.4rem;
}

.bridge-in {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 1.8rem;
}

.think-layout {
  position: sticky;
  top: 0;
  height: 100vh;
  width: min(1120px, 92vw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 6vw;
  align-items: center;
  padding: 0 0;
  box-sizing: border-box;
}

.hub {
  position: relative;
  height: min(58vh, 460px);
  width: 100%;
}

.hub-axes {
  position: absolute;
  inset: 8%;
  width: 84%;
  height: 84%;
  overflow: visible;
}

.hub-axes line {
  stroke: var(--ink);
  stroke-width: 0.8;
  opacity: 0.22;
  transition: opacity 0.8s var(--ease);
}

.hub.is-absorb .hub-axes line {
  opacity: 0.08;
}

.hub-core,
.hub-node {
  position: absolute;
  left: 50%;
  top: 50%;
}

.hub-core {
  transform: translate(-50%, -50%);
  width: 7.2rem;
  height: 7.2rem;
  border-radius: 50%;
  border: 1px solid var(--ink);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 1.35rem;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  letter-spacing: -0.03em;
  z-index: 2;
}

.hub-node {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
  padding: 0.15em 0.5em;
  background: var(--paper);
  z-index: 1;
  transition: transform 1s var(--ease), opacity 0.8s var(--ease);
}

.hub-cells {
  transform: translate(-50%, calc(-50% - 198px));
}

.hub-treat {
  transform: translate(-50%, calc(-50% + 198px));
}

.hub-studies {
  transform: translate(calc(-50% - 214px), -50%);
}

.hub-disease {
  transform: translate(calc(-50% + 214px), -50%);
}

.hub.is-absorb .hub-cells {
  transform: translate(-50%, calc(-50% - 148px));
  opacity: 0.55;
}

.hub.is-absorb .hub-treat {
  transform: translate(-50%, calc(-50% + 148px));
  opacity: 0.55;
}

.hub.is-absorb .hub-studies {
  transform: translate(calc(-50% - 164px), -50%);
  opacity: 0.55;
}

.hub.is-absorb .hub-disease {
  transform: translate(calc(-50% + 164px), -50%);
  opacity: 0.55;
}

.think-copy {
  position: relative;
  min-height: 12rem;
}

.verb-chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.55rem;
  margin: 0 0 1.8rem;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
}

.verb-chain span[data-verb] {
  color: var(--muted);
  opacity: 0.38;
  transition: opacity 0.5s var(--ease), color 0.5s var(--ease);
}

.verb-chain span.is-on {
  color: var(--ink);
  opacity: 1;
}

.verb-arrow {
  color: var(--muted);
  opacity: 0.35;
  font-size: 0.72rem;
  letter-spacing: 0;
}

.think-step {
  position: absolute;
  left: 0;
  right: 0;
  top: 4.2rem;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
  pointer-events: none;
}

.think-step.is-on {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.think-step h2 {
  font-size: clamp(1.55rem, 2.8vw, 2.2rem);
  line-height: 1.2;
}

.break-inner .huge {
  color: var(--on-dark);
  margin-bottom: 3.2vh;
}

.break-body p {
  color: rgba(239, 234, 224, 0.72);
}

.break-body .emphasis {
  color: var(--on-dark);
}

.cancer-layout {
  width: min(640px, 90vw);
  margin-right: auto;
  margin-left: 8vw;
}

.cancer-connect {
  opacity: 0.35;
  transition: opacity 0.8s var(--ease);
}

.scene-cancer.is-connect .cancer-connect {
  opacity: 1;
}

.close-inner h2 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  margin-bottom: 3.2rem;
}

.wordmark-lg {
  font-size: 0.82rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink);
  margin: 0 0 2.4rem;
}

.mail {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 500;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 0.15rem;
}

.mail:hover {
  opacity: 0.55;
}

.mail-address {
  display: block;
  margin-top: 1.1rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.mail-address:hover {
  color: var(--ink);
}

@media (max-width: 860px) {
  .top {
    padding: 1.1rem 1.2rem;
  }

  .scene {
    padding: 16vh 7vw 12vh;
  }

  .think-layout {
    grid-template-columns: 1fr;
    height: 100vh;
    padding: 8vh 0 6vh;
  }

  .scene-think {
    min-height: 260vh;
    padding: 0;
  }

  .hub {
    height: 320px;
    margin-bottom: 2rem;
  }

  .hub-cells {
    transform: translate(-50%, calc(-50% - 136px));
  }

  .hub-treat {
    transform: translate(-50%, calc(-50% + 136px));
  }

  .hub-studies {
    transform: translate(calc(-50% - 142px), -50%);
  }

  .hub-disease {
    transform: translate(calc(-50% + 142px), -50%);
  }

  .hub.is-absorb .hub-cells {
    transform: translate(-50%, calc(-50% - 118px));
  }

  .hub.is-absorb .hub-treat {
    transform: translate(-50%, calc(-50% + 118px));
  }

  .hub.is-absorb .hub-studies {
    transform: translate(calc(-50% - 124px), -50%);
  }

  .hub.is-absorb .hub-disease {
    transform: translate(calc(-50% + 124px), -50%);
  }

  .think-copy {
    min-height: 8rem;
  }

  .think-step {
    position: absolute;
    top: 4.2rem;
  }

  .cancer-layout {
    margin-left: 0;
  }

  .fragments span {
    font-size: 0.72rem;
  }
}

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

  .scroll-arrow,
  .fragments span,
  .hub-node,
  .think-step {
    animation: none;
    transition: none;
  }

  .think-step {
    position: relative;
    top: auto;
    opacity: 1;
    transform: none;
    margin-bottom: 1.2rem;
  }

  .verb-chain span.is-on,
  .scene-fragments .fragments span {
    opacity: 1;
    transform: none;
  }
}