/* ------------------------------------------------------------------ tokens */
:root {
  --paper: #F4F1E8;
  --paper-2: #FFFAEC;
  --ink: #1D2126;
  --ink-2: #33373D;
  --muted: #6E7278;
  --rule: #D9D4C6;
  --sand: #CDC9BA;
  --unobs: #D6D1C3;
  --green: #46C535;
  --green-ink: #237A17;
  --teal: #1F756A;
  --red: #9E2B38;
  --serif: 'Spectral', 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
  --gutter: clamp(20px, 5.5vw, 96px);
  --vh: 100vh;
}
@supports (height: 100svh) { :root { --vh: 100svh; } }

/* ------------------------------------------------------------------ base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 15px/1.6 var(--mono);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; }
h1, h2, p, ul, ol { margin: 0; }
canvas { display: block; }
:focus-visible { outline: 2px solid var(--green-ink); outline-offset: 3px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: fixed; left: var(--gutter); top: -4rem; z-index: 20;
  padding: .6rem .9rem; background: var(--ink); color: var(--paper);
  font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; text-decoration: none;
  transition: top .2s;
}
.skip:focus { top: 1rem; }

/* ------------------------------------------------------------------ type */
h1 {
  font: 300 clamp(2.5rem, 4.9vw + .5rem, 5.8rem) / 1.03 var(--serif);
  letter-spacing: -.015em;
  text-wrap: balance;
  margin-bottom: 1.4rem;
}
.statement {
  font: 300 clamp(1.9rem, 2.9vw + .6rem, 3.5rem) / 1.1 var(--serif);
  letter-spacing: -.012em;
  margin-bottom: 1rem;
  text-wrap: balance;
}
.statement--h2 { margin-bottom: 1.2rem; }
.statement-xl {
  font: 300 clamp(2.2rem, 4.4vw + .6rem, 5.4rem) / 1.06 var(--serif);
  letter-spacing: -.02em;
  max-width: 24ch;
  margin-bottom: 3rem;
}
.lede { font-size: 1rem; color: var(--ink-2); max-width: 30rem; margin-bottom: 2.2rem; }
.note, .label, .readout, .legend {
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.note { max-width: 26rem; }
.label { margin-bottom: 4rem; }

.actions { display: flex; flex-wrap: wrap; gap: 1.2rem 2rem; align-items: center; }
.button {
  display: inline-block; padding: .8em 1.2em; border: 1px solid var(--ink);
  font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; text-decoration: none;
  transition: background .2s, color .2s;
}
.button:hover { background: var(--ink); color: var(--paper); }
.link {
  font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; text-decoration: none;
  border-bottom: 1px solid var(--sand); padding-bottom: 3px;
  transition: color .2s, border-color .2s;
}
.link:hover { color: var(--green-ink); border-color: var(--green-ink); }

/* ------------------------------------------------------------------ nav */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px var(--gutter);
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  transition: background .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled { background: rgba(244, 241, 232, .86); }
.nav.is-scrolled { background: color-mix(in srgb, var(--paper) 86%, transparent); border-color: var(--rule); backdrop-filter: blur(6px); }
.nav a, .footer a { text-decoration: none; }
.nav nav { display: flex; gap: 2rem; }
.nav nav a:hover { color: var(--green-ink); }
.wordmark { display: inline-flex; align-items: center; gap: 10px; font-weight: 500; letter-spacing: .1em; }
.mark { flex: none; }

/* ------------------------------------------------------------------ story (scenes 01–03) */
.story { position: relative; height: calc(var(--vh) * 4.8); }
.story .anchor { position: absolute; top: 66%; left: 0; width: 1px; height: 1px; }
.story__stage { position: sticky; top: 0; height: var(--vh); overflow: hidden; }
.field { position: absolute; inset: 0; width: 100%; height: 100%; }
.wash {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(244,241,232,.9) 0%, rgba(244,241,232,.72) 26%, rgba(244,241,232,0) 56%);
}

.step {
  position: absolute; left: var(--gutter); top: 50%;
  transform: translateY(-50%);
  max-width: min(42rem, 46vw);
  opacity: 0; visibility: hidden;
  transition: opacity .55s ease, visibility 0s .55s;
}
.step.is-on { opacity: 1; visibility: visible; transition: opacity .55s ease .08s, visibility 0s; }
.step[data-step="1"], .step[data-step="2"], .step[data-step="3"] { max-width: min(30rem, 40vw); }

.story__stage .readout { position: absolute; left: var(--gutter); bottom: 26px; }
.legend {
  position: absolute; right: var(--gutter); bottom: 26px;
  display: flex; gap: 1.6rem; list-style: none; padding: 0;
}
.legend li { display: inline-flex; align-items: center; gap: .55rem; }
.sw { display: inline-block; width: 9px; height: 9px; background: var(--unobs); box-shadow: inset 0 0 0 1px var(--sand); }
.sw--meas { background: linear-gradient(90deg, var(--red) 50%, var(--teal) 50%); box-shadow: inset 0 0 0 2px var(--paper), inset 0 0 0 3px var(--ink); }
.sw--inf { background: var(--green); }

/* ------------------------------------------------------------------ evidence (scene 04) */
.evidence { padding: 20vh var(--gutter) 18vh; border-top: 1px solid var(--rule); }
.figures {
  display: grid; grid-template-columns: repeat(4, 1fr);
  list-style: none; padding: 0; border-top: 1px solid var(--rule);
}
.figures li { padding: 2.6rem 1.6rem 2.6rem 0; border-right: 1px solid var(--rule); }
.figures li + li { padding-left: 1.6rem; }
.figures li:last-child { border-right: 0; padding-right: 0; }
.figure {
  display: block; font: 300 clamp(3.2rem, 6vw, 7rem) / 1 var(--serif);
  letter-spacing: -.03em; margin-bottom: 1.1rem; font-variant-numeric: lining-nums;
}
.cap { display: block; font-size: .8rem; color: var(--ink-2); max-width: 15rem; line-height: 1.55; }
.evidence__note { max-width: 40rem; margin: 4.5rem 0 1.6rem; color: var(--ink-2); }

/* ------------------------------------------------------------------ domains (scene 05) */
.domains { position: relative; height: calc(var(--vh) * 4.6); border-top: 1px solid var(--rule); }
.domains__stage {
  position: sticky; top: 0; height: var(--vh);
  display: grid; grid-template-columns: minmax(17rem, 1fr) minmax(0, 1.45fr);
  gap: clamp(2rem, 5vw, 5rem); align-items: center;
  padding: 0 var(--gutter);
}
.plate {
  position: relative; margin: 0; width: 100%;
  height: min(calc(var(--vh) * .72), 58vw);
  border: 1px solid var(--rule); background: var(--paper);
}
.plate .field { inset: 0; }
.readout--plate { position: absolute; left: 0; right: 0; bottom: -2.1rem; }
.domains__list { list-style: none; padding: 0; margin-top: .4rem; display: grid; gap: .55rem; counter-reset: none; }
.domains__list li {
  display: grid; grid-template-columns: 8px 7.5rem 1fr; gap: 1rem; align-items: baseline;
  color: var(--muted); font-size: .85rem; transition: color .4s;
}
.domains__list li::before { content: ''; width: 8px; height: 8px; background: var(--unobs); transition: background .4s; align-self: center; }
.domains__list li.is-on { color: var(--ink); }
.domains__list li.is-on::before { background: var(--green); }
.domains__list .how { color: var(--muted); }

/* ------------------------------------------------------------------ thesis (scene 06) */
.thesis { padding: 24vh var(--gutter) 22vh; border-top: 1px solid var(--rule); }
.credits { margin-top: 5rem; font-size: .78rem; line-height: 1.9; color: var(--muted); max-width: 44rem; }

/* ------------------------------------------------------------------ footer */
.footer {
  border-top: 1px solid var(--rule); padding: 2.6rem var(--gutter) 3rem;
  font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
}
.footer__row { display: flex; flex-wrap: wrap; gap: 1.2rem 3rem; justify-content: space-between; align-items: center; }
.footer__row .wordmark { color: var(--ink); }
.footer nav { display: flex; gap: 2rem; }
.footer nav a:hover { color: var(--green-ink); }
.footer__end { margin-top: 5.5rem; display: flex; flex-direction: column; gap: 1.4rem; align-items: flex-start; }
.footer__line { font: italic 300 1.5rem / 1.3 var(--serif); letter-spacing: 0; text-transform: none; color: var(--ink); }

/* ------------------------------------------------------------------ text reconstruction */
.rc-vis .rc-w { white-space: nowrap; }
.rc-ready .rc { position: relative; color: transparent; }
.rc-ready .rc::before {
  content: ''; position: absolute; left: 50%; top: 50%;
  width: .34em; height: .34em; margin: -.2em 0 0 -.17em;
  background: var(--unobs);
}
.rc-on .rc { animation: rc-glyph .01s linear both; animation-delay: calc(var(--d) * 900ms + 120ms); }
.rc-on .rc::before { animation: rc-cell .01s linear both; animation-delay: calc(var(--d) * 900ms + 120ms); }
.rc-on .rc--held { animation-name: rc-glyph-held; animation-duration: 760ms; animation-delay: calc(var(--d) * 900ms + 520ms); }
.rc-on .rc--held::before { animation-name: rc-cell-held; animation-duration: 760ms; animation-delay: calc(var(--d) * 900ms + 520ms); }
@keyframes rc-glyph { to { color: currentcolor; } }
@keyframes rc-cell { to { opacity: 0; } }
@keyframes rc-glyph-held {
  0%, 44% { color: transparent; }
  45%, 84% { color: var(--green-ink); }
  100% { color: currentcolor; }
}
@keyframes rc-cell-held {
  0%, 44% { background: var(--green); opacity: 1; }
  45%, 100% { opacity: 0; }
}

/* ------------------------------------------------------------------ responsive */
@media (max-width: 719px) {
  body { font-size: 14px; }
  .nav { padding: 14px var(--gutter); }
  .nav nav { gap: 1.3rem; }
  .nav nav a[href="#idea"] { display: none; }
  .step { top: 12.5vh; top: 12.5svh; transform: none; right: var(--gutter); max-width: none; }
  .step[data-step="1"], .step[data-step="2"], .step[data-step="3"] { max-width: none; }
  h1 { margin-bottom: 1rem; }
  .lede { margin-bottom: 1.6rem; }
  .legend { display: none; }
  .wash { background: linear-gradient(180deg, rgba(244,241,232,.92) 0%, rgba(244,241,232,.78) 34%, rgba(244,241,232,0) 54%); }
  .story__stage .readout { bottom: 18px; }
  .figures { grid-template-columns: 1fr 1fr; }
  .figures li { padding: 1.8rem 1rem 1.8rem 0; }
  .figures li + li { padding-left: 1rem; }
  .figures li:nth-child(2n) { border-right: 0; padding-right: 0; }
  .figures li:nth-child(n + 3) { border-top: 1px solid var(--rule); }
  .figures li:nth-child(3) { padding-left: 0; }
  .evidence { padding: 14vh var(--gutter) 14vh; }
  .domains__stage { grid-template-columns: 1fr; align-content: start; gap: 1.4rem; padding-top: 11vh; padding-top: 11svh; }
  .plate { height: min(48vh, 48svh); }
  .domains__list { margin-top: .2rem; gap: .35rem; }
  .domains__list li { grid-template-columns: 8px 6.6rem 1fr; font-size: .78rem; }
  .thesis { padding: 16vh var(--gutter) 14vh; }
  .footer__end { margin-top: 3.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .step { transition: none; }
  .rc-ready .rc { color: inherit; }
  .rc-ready .rc::before { display: none; }
}