@font-face {
  font-family: "Imbue";
  src: url("fonts/imbue-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Hanken";
  src: url("fonts/hanken-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Hanken";
  src: url("fonts/hanken-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #f7f6f1;
  --ink: #111110;
  --muted: #6e6d67;
  --line: rgba(17, 17, 16, 0.17);
  --display: "Imbue", Georgia, serif;
  --body: "Hanken", Arial, sans-serif;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --header: 0rem;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

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

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

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.proof-intro {
  position: relative;
  z-index: 2;
  min-height: 100svh;
  overflow: clip;
}

.intro-frame {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 100svh;
  padding: calc(var(--header) + 4rem) var(--gutter) 4rem;
  overflow: hidden;
}

.hero-dna-field {
  position: absolute;
  z-index: 0;
  inset: var(--header) 0 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-dna-carrier {
  position: absolute;
  aspect-ratio: 3 / 2;
  color: var(--ink);
  pointer-events: none;
  transform-origin: center;
  will-change: transform;
}

.hero-dna-detail,
.hero-dna-motion {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transform-origin: center;
  will-change: opacity, transform;
}

.hero-dna-detail {
  opacity: 0.14;
  mix-blend-mode: multiply;
  animation: hero-projector-gate 1.65s steps(1, end) infinite;
}

.hero-dna-motion {
  opacity: 0;
  mix-blend-mode: multiply;
}

.hero-video-ready .hero-dna-detail {
  opacity: 0;
  animation: none;
}

.hero-video-ready .hero-dna-motion {
  animation: hero-projector-gate 1.65s steps(1, end) infinite;
}

@keyframes hero-projector-gate {
  0%, 100% {
    opacity: 0.14;
    transform: translate3d(0, 0, 0) scale(1);
  }
  7% {
    opacity: 0.132;
    transform: translate3d(0.45px, -0.35px, 0) scale(1);
  }
  8.5% {
    opacity: 0.155;
    transform: translate3d(-0.7px, 0.55px, 0) scale(1.001);
  }
  10%, 52% {
    opacity: 0.14;
    transform: translate3d(0, 0, 0) scale(1);
  }
  29% {
    opacity: 0.143;
    transform: translate3d(0.3px, -0.2px, 0) scale(1);
  }
  48% {
    opacity: 0.135;
    transform: translate3d(-0.4px, 0.3px, 0) scale(1);
  }
  49% {
    opacity: 0.151;
    transform: translate3d(0.55px, -0.45px, 0) scale(1.001);
  }
  76% {
    opacity: 0.145;
    transform: translate3d(-0.25px, 0.4px, 0) scale(1);
  }
  89% {
    opacity: 0.137;
    transform: translate3d(0.45px, -0.15px, 0) scale(1);
  }
}

.hero-dna-carrier {
  top: 50%;
  left: 50%;
  width: min(86vw, calc((100svh - var(--header) - 2rem) * 1.5), 68rem);
  transform: translate3d(-50%, -50%, 0);
}

.intro-rule {
  position: absolute;
  z-index: 1;
  top: var(--header);
  bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(transparent, var(--line) 24%, var(--line) 76%, transparent);
  transform-origin: center;
  will-change: opacity, transform;
}

.intro-copy {
  position: relative;
  z-index: 2;
  width: min(100%, 76rem);
  text-align: center;
  will-change: opacity, transform;
}

.eyebrow {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: clamp(0.7rem, 0.66rem + 0.15vw, 0.8rem);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
p {
  text-wrap: pretty;
}

h1,
h2 {
  font-family: var(--display);
  font-weight: 500;
}

h1 {
  margin: 0;
  font-size: clamp(4rem, 2rem + 7vw, 9rem);
  letter-spacing: -0.04em;
  line-height: 0.8;
}

h1 em {
  color: transparent;
  font-style: normal;
  -webkit-text-stroke: 1.5px var(--ink);
}

.hero-title-line {
  display: block;
}

.intro-copy > p:not(.eyebrow) {
  width: min(100%, 48rem);
  margin: clamp(2.4rem, 5vw, 4.5rem) auto 0;
  font-size: clamp(1rem, 0.92rem + 0.35vw, 1.25rem);
  line-height: 1.48;
}

.intro-copy strong {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 500;
}

.hero-body-detail {
  display: block;
}

.begin-link,
.proof-outro a {
  display: inline-flex;
  gap: 0.9rem;
  align-items: center;
  margin-top: 2rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid currentColor;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
}

.begin-link span,
.proof-outro a span {
  transition: transform 350ms var(--ease);
}

.begin-link:hover span {
  transform: translateY(0.25rem);
}

.proof-outro a:hover span {
  transform: translateY(-0.2rem);
}

.motion-film {
  position: relative;
  z-index: 1;
  height: 1280svh;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.motion-stage {
  --panel-pad: clamp(0.75rem, 2vw, 2rem);
  position: sticky;
  top: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  width: 100%;
  height: 100svh;
  padding: calc(var(--header) + 2rem) var(--gutter) 4rem;
  overflow: hidden;
  background:
    linear-gradient(90deg, transparent calc(50% - 0.5px), rgba(17, 17, 16, 0.09) 50%, transparent calc(50% + 0.5px)),
    var(--paper);
}

.copy-deck {
  position: relative;
  z-index: 3;
  grid-column: 1;
  grid-row: 1;
  align-self: center;
  width: 100%;
  min-height: 28rem;
  will-change: transform;
}

.chapter-copy {
  position: absolute;
  inset: 0 var(--panel-pad);
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 31rem;
  margin-inline: auto;
  opacity: 0;
  pointer-events: none;
  will-change: opacity;
}

.chapter-copy h2,
.proof-outro h2,
.static-story h2 {
  margin: 0;
  font-size: clamp(3rem, 2rem + 3.4vw, 6rem);
  letter-spacing: -0.035em;
  line-height: 0.86;
}

.text-motion-ready .chapter-copy h2 {
  --heading-lift: 18px;
  perspective: 700px;
  position: relative;
  color: transparent;
  transform: translateY(var(--heading-lift));
  transform-style: preserve-3d;
  will-change: transform, clip-path;
}

.text-motion-ready .replication-word {
  --word-template-opacity: 0;
  --word-template-rotate: 82deg;
  --word-template-y: 16px;
  --word-template-scale: 0.42;
  --word-solid-opacity: 0;
  --word-solid-rotate: -72deg;
  --word-solid-y: -12px;
  --word-solid-scale: 0.5;
  --word-solid-clip: 0%;
  --word-origin: left;
  position: relative;
  display: inline-block;
  color: transparent;
  transform-style: preserve-3d;
  vertical-align: top;
  white-space: nowrap;
}

.text-motion-ready .replication-word:not(:last-child) {
  margin-right: 0.18em;
}

.text-motion-ready .replication-word::before,
.text-motion-ready .replication-word::after {
  position: absolute;
  inset: 0;
  display: block;
  content: attr(data-word);
  color: var(--ink);
  font: inherit;
  letter-spacing: inherit;
  line-height: inherit;
  backface-visibility: hidden;
  pointer-events: none;
  transform-origin: var(--word-origin) center;
  will-change: opacity, transform;
}

.text-motion-ready .replication-word::before {
  color: transparent;
  opacity: var(--word-template-opacity);
  -webkit-text-stroke: 1px var(--ink);
  transform: translate3d(0, var(--word-template-y), 0) rotateY(var(--word-template-rotate)) scaleX(var(--word-template-scale));
}

.text-motion-ready .replication-word::after {
  opacity: var(--word-solid-opacity);
  clip-path: inset(0 0 var(--word-solid-clip) 0);
  transform: translate3d(0, var(--word-solid-y), 0) rotateY(var(--word-solid-rotate)) scaleX(var(--word-solid-scale));
}

.chapter-copy > p:last-child {
  --body-opacity: 1;
  --body-clip: 0%;
  --body-lift: 0px;
  width: min(100%, 27rem);
  margin: 2rem 0 0;
  font-size: clamp(0.98rem, 0.9rem + 0.25vw, 1.14rem);
  line-height: 1.55;
}

.text-motion-ready .chapter-copy > p:last-child {
  opacity: var(--body-opacity);
  clip-path: inset(0 0 var(--body-clip) 0);
  transform: translateY(var(--body-lift));
  will-change: opacity, transform, clip-path;
}

.dna-stage {
  position: relative;
  z-index: 2;
  display: grid;
  grid-column: 2;
  grid-row: 1;
  align-self: stretch;
  margin: 0;
  min-width: 0;
  padding-inline: var(--panel-pad);
  place-items: center;
  overflow: hidden;
  will-change: transform;
}

.dna-svg {
  display: block;
  width: min(100%, 52rem);
  height: min(100%, 52rem);
  overflow: hidden;
  transform-origin: center;
  will-change: transform;
}

.strand,
.strand-halo,
.base-bars line,
.copy-bars line,
.daughter-bars line,
.template-teeth line,
.new-strand-outer,
.new-strand-inner,
.leading-primer {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.strand-halo {
  stroke: var(--paper);
  stroke-width: 13px;
}

.strand {
  stroke: var(--ink);
  stroke-width: 6px;
}

.base-bars line,
.copy-bars line,
.daughter-bars line,
.template-teeth line {
  stroke: var(--ink);
  stroke-width: 2.6px;
}

.copy-bars line,
.daughter-bars line,
.template-teeth line {
  opacity: 0;
}

.pair-study {
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
  will-change: opacity, transform;
}

.pair-study path {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 4px;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.pair-study text {
  fill: var(--ink);
  font-family: var(--body);
  font-size: 50px;
  font-weight: 400;
  text-anchor: middle;
}

.new-strand-outer {
  stroke: var(--ink);
  stroke-width: 9px;
}

.new-strand-inner {
  stroke: var(--paper);
  stroke-width: 4.5px;
}

.new-dna > path,
.new-dna > g,
.leading-primer,
.lagging-primers ellipse {
  opacity: 0;
  will-change: opacity;
}

.leading-primer {
  stroke: var(--ink);
  stroke-width: 15px;
}

.lagging-primers ellipse {
  fill: var(--ink);
  transform-box: fill-box;
  transform-origin: center;
}

.helicase,
.holding-proteins > g,
.polymerase,
.ligase {
  fill: var(--ink);
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
  will-change: opacity, transform;
}

.helicase .enzyme-cut {
  fill: var(--paper);
}

.polymerase > path,
.ligase > path:first-child {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 5px;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.polymerase circle {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 4px;
  vector-effect: non-scaling-stroke;
}

.ligase > path:last-child {
  fill: none;
  stroke: var(--ink);
  stroke-width: 5px;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.dna-stage figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  max-width: 17rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.69rem;
  letter-spacing: 0.05em;
  line-height: 1.45;
  opacity: 0;
  text-align: right;
  text-transform: uppercase;
  transform: translateY(8px);
  will-change: opacity, transform;
}

.static-story {
  display: none;
}

.proof-outro {
  display: grid;
  place-content: center;
  min-height: 90svh;
  padding: 7rem var(--gutter);
  text-align: center;
}

.proof-outro h2 {
  font-size: clamp(4rem, 2.4rem + 6vw, 8rem);
}

.proof-outro > p:not(.eyebrow) {
  width: min(100%, 38rem);
  margin: 2rem auto 0;
  font-size: clamp(1rem, 0.94rem + 0.25vw, 1.18rem);
}

footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 6rem;
  padding: 1.5rem var(--gutter);
  border-top: 1px solid var(--line);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

footer p {
  margin: 0;
  font-weight: 500;
}

footer span {
  color: var(--muted);
}

.no-motion .motion-film {
  display: none;
}

.no-motion .hero-dna-detail {
  animation: none;
}

.no-motion .hero-dna-motion {
  display: none;
}

.no-motion .proof-intro {
  min-height: 100svh;
}

.no-motion .intro-frame {
  position: relative;
}

.no-motion .static-story {
  display: block;
  border-top: 1px solid var(--line);
}

.static-story article {
  display: grid;
  grid-template-columns: minmax(18rem, 0.8fr) minmax(18rem, 1.2fr);
  gap: clamp(2rem, 7vw, 8rem);
  align-items: center;
  min-height: 100svh;
  padding: calc(var(--header) + 4rem) var(--gutter) 4rem;
  border-bottom: 1px solid var(--line);
}

.static-story article > div {
  max-width: 32rem;
}

.static-story article > div > p:last-child {
  max-width: 28rem;
  margin: 2rem 0 0;
}

.static-story img {
  display: block;
  width: min(100%, 42rem);
  height: auto;
  justify-self: center;
  mix-blend-mode: multiply;
}

@media (max-width: 760px) {
  :root {
    --header: 0rem;
  }

  .intro-frame {
    padding-top: calc(var(--header) + 3.5rem);
  }

  .hero-dna-carrier {
    width: min(92vw, calc((100svh - var(--header) - 2rem) * 1.5), 34rem);
    transform: translate3d(-50%, -50%, 0);
  }

  h1 {
    font-size: clamp(3.9rem, 18vw, 6rem);
    line-height: 0.83;
  }

  .motion-film {
    height: 1180svh;
  }

  .motion-stage {
    --panel-pad: 0;
    grid-template-columns: 1fr;
    grid-template-rows: 46svh minmax(0, 1fr);
    padding: var(--header) var(--gutter) 3.7rem;
  }

  .motion-stage {
    background:
      linear-gradient(
        180deg,
        transparent calc(var(--header) + 46svh - 0.5px),
        rgba(17, 17, 16, 0.09) calc(var(--header) + 46svh),
        transparent calc(var(--header) + 46svh + 0.5px)
      ),
      var(--paper);
  }

  .dna-stage {
    grid-column: 1;
    grid-row: 1;
    padding-inline: 0;
  }

  .dna-svg {
    width: min(100%, 46svh);
    height: auto;
    max-width: 100%;
    max-height: 100%;
  }

  .dna-stage figcaption {
    display: none;
  }

  .copy-deck {
    grid-column: 1;
    grid-row: 2;
    align-self: stretch;
    min-height: 0;
  }

  .chapter-copy {
    inset-inline: 0;
    justify-content: center;
    max-width: none;
  }

  .chapter-copy h2 {
    max-width: 24rem;
    font-size: clamp(2.75rem, 13vw, 4.4rem);
  }

  .chapter-copy > p:last-child {
    max-width: 34rem;
    margin-top: 1.25rem;
    font-size: 0.95rem;
    line-height: 1.45;
  }

  .static-story article {
    grid-template-columns: 1fr;
    gap: 2rem;
    min-height: 0;
    padding-top: calc(var(--header) + 3rem);
    padding-bottom: 4rem;
  }

  .static-story article img {
    grid-row: 1;
  }

  .static-story h2 {
    font-size: clamp(3rem, 14vw, 4.8rem);
  }

  .proof-outro {
    min-height: 80svh;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 0.35rem;
  }
}

@media (max-height: 700px) and (min-width: 761px) {
  .motion-stage {
    padding-top: calc(var(--header) + 1rem);
  }

  .chapter-copy h2 {
    font-size: clamp(2.8rem, 5.5vw, 4.6rem);
  }

  .chapter-copy > p:last-child {
    margin-top: 1.25rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .hero-dna-detail {
    animation: none;
  }

  .hero-dna-motion {
    display: none;
  }
}