/* Additions below the original Ark scene. The zero, veil, logo and poster
   composition continue to use their original resolvers and tokens. */
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
.skip { position: fixed; top: -100px; left: 20px; z-index: 100; padding: 14px 20px; background: #fff; color: #000; font: 14px "Albert Sans", sans-serif; }
.skip:focus { top: 16px; }
.expansion {
  --text: hsl(var(--text-strong));
  --muted: hsl(var(--text-muted));
  --accent: hsl(var(--primary));
  --line: hsl(var(--border-subtle));
  background: transparent;
  color: var(--text);
  font-family: "Albert Sans", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.expansion *, .expansion *::before, .expansion *::after { box-sizing: border-box; }
.expansion a { color: inherit; text-decoration: none; }
.expansion button, .expansion input { font: inherit; color: inherit; }
.expansion button { cursor: pointer; }
.expansion a:focus-visible, .expansion button:focus-visible, .expansion input:focus-visible { outline: none; color: hsl(var(--text-strong)); background-color: hsl(var(--raised)); }
.expansion .section { padding: 100px 7%; }
.expansion .eyebrow { font-size: 10px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin: 0 0 26px; }
.expansion :is(h1,h2) { font-size: clamp(34px, 3.5vw, 54px); line-height: 1.12; letter-spacing: -.035em; font-weight: 400; margin: 0; }
.expansion em { font-style: normal; font-weight: 400; color: var(--accent); }
.expansion .section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; margin-bottom: 38px; }
.expansion .section-heading > p { color: var(--muted); font-size: 14px; line-height: 1.7; margin: 0 0 4px; }
.expansion .section-heading .model-status { display: inline-block; margin: 14px 0 0; padding: 7px 10px; border: 1px solid hsl(var(--border-default)); border-radius: 999px; color: hsl(var(--text-strong)); font-size: 10px; line-height: 1.2; letter-spacing: .08em; text-transform: uppercase; }
.expansion .experiments { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.expansion .lab { border: 1px solid hsl(var(--border-default)); border-radius: 6px; overflow: hidden; background: hsl(var(--surface)); }
.expansion .lab-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 0 26px; border-bottom: 1px solid var(--line); }
.expansion .study-tabs { display: flex; gap: 28px; }
.expansion .study-tabs button { background: none; border: 0;  padding: 22px 0; font-size: 10px; color: var(--muted); }
.expansion .study-tabs button span { margin-left: 10px; font-size: 13px; }
.expansion .study-tabs button[aria-pressed="true"] { color: hsl(var(--text-strong)); background: hsl(var(--nested)); }
.expansion .live-label { display: flex; gap: 8px; align-items: center; font-size: 8px; letter-spacing: .1em; color: var(--muted); }
.expansion .status-dot { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.expansion .experiment-stage { height: 350px; position: relative; overflow: hidden; display: grid; place-items: center; background: hsl(var(--surface) / .5); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.expansion .experiment-grid { display: none; }
.expansion .stage-corner, .expansion .stage-footnote, .expansion .stage-axis { position: absolute; font-size: 9px; font-weight: 500; letter-spacing: .1em; color: var(--muted); }
.expansion .stage-corner { top: 26px; left: 26px; }
.expansion .stage-footnote { bottom: 24px; left: 26px; font-size: 8px; }
.expansion .stage-axis { bottom: 24px; right: 26px; }
.expansion .specimen { display: flex; align-items: center; justify-content: center; position: relative; width: 80%; height: 190px; --distance: 39px; --depth: 50; }
.expansion .dot-group { display: grid; grid-template-columns: repeat(2,14px); gap: 12px; margin: 0 calc(var(--distance)/2); transition: margin .12s; flex-shrink: 0; }
.expansion .dot-group i { width: 14px; height: 14px; border-radius: 50%; background: var(--accent); }
.expansion .rhythm-bar { width: 12px; margin: 0 clamp(3px, 1vw, 10px); height: calc(35px + var(--amplitude)*1px); background: var(--accent); border-radius: 2px; transition: height .15s; opacity: var(--opacity); }
.expansion .depth-plane { position: absolute; width: 150px; height: 150px; border: 1px solid var(--accent); background: hsl(var(--surface) / .4); transform: translate(calc(var(--layer)*var(--depth)*.7px),calc(var(--layer)*var(--depth)*-.35px)) rotate(-25deg) skew(10deg,10deg); opacity: calc(.75 - var(--layer)*.15); transition: transform .15s; }
.expansion .lab-bottom { border-top: 1px solid var(--line); padding: 28px 30px; display: grid; grid-template-columns: 1fr 310px; gap: 55px; }
.expansion .study-description h3 { font-size: 17px; font-weight: 500; letter-spacing: -.02em; margin: 0 0 9px; }
.expansion .study-description p { font-size: 13px; line-height: 1.7; color: var(--muted); max-width: 500px; margin: 0; }
.expansion .control { align-self: center; }
.expansion .control-label, .expansion .control-ends { display: flex; justify-content: space-between; gap: 10px; font-size: 11px; }
.expansion .control-label output { color: var(--accent); font-variant-numeric: tabular-nums; }
.expansion .control-ends { color: var(--muted); font-size: 10px; }
.expansion .control input { width: 100%; accent-color: var(--accent); margin: 15px 0; cursor: pointer; min-height: 20px; }
.expansion button:disabled, .expansion input:disabled { cursor: default; opacity: .65; }
.expansion .lab-note { color: var(--muted); font-size: 12px; margin: 18px 0 0; }
.expansion .lab-note span { color: var(--accent); margin-right: 10px; }
.expansion .lab-note a { color: hsl(var(--text-strong)); border-bottom: 1px solid hsl(var(--border-default)); }
.expansion .no-script { margin: 20px; color: var(--accent); font-size: 13px; }
.is-ready .expansion .no-script { display: none; }
.expansion .approach { display: grid; grid-template-columns: 1fr 1.05fr; gap: 12%; border-bottom: 1px solid var(--line); }
.expansion .approach-intro > p:not(.eyebrow) { color: var(--muted); font-size: 14px; line-height: 1.8; max-width: 390px; }
.expansion .approach h2 { margin-bottom: 28px; }
.expansion .text-link { display: inline-flex; gap: 22px; font-size: 12px; padding: 13px 0; border-bottom: 1px solid hsl(var(--border-default)); margin-top: 12px; }
.expansion .principles { padding-top: 32px; }
.expansion .principles article { display: grid; grid-template-columns: 20px 1fr 25px; gap: 18px; padding: 29px 0; border-top: 1px solid var(--line); }
.expansion .principles article > span:first-child { color: var(--muted); font-size: 10px; padding-top: 5px; }
.expansion .principles h3 { font-size: 19px; font-weight: 400; letter-spacing: -.02em; margin: 0 0 12px; }
.expansion .principles p { color: var(--muted); font-size: 13px; line-height: 1.8; margin: 0; max-width: 340px; }
.expansion .principle-symbol { color: var(--accent); font-size: 27px; }
@media(max-width:600px) {
  .expansion .section { padding: 65px 5%; }
  .expansion .section-heading { display: block; margin-bottom: 30px; }
  .expansion .section-heading > p { margin-top: 22px; font-size: 13px; }
  .expansion .lab-toolbar { padding: 0 16px; }
  .expansion .study-tabs { width: 100%; justify-content: space-between; gap: 14px; }
  .expansion .study-tabs button { padding: 19px 0; }
  .expansion .study-tabs button span { font-size: 12px; margin-left: 6px; }
  .expansion .live-label { display: none; }
  .expansion .experiment-stage { height: 280px; }
  .expansion .stage-corner, .expansion .stage-footnote { left: 17px; }
  .expansion .stage-footnote { font-size: 6px; letter-spacing: .08em; max-width: 80%; }
  .expansion .dot-group { grid-template-columns: repeat(2,10px); gap: 8px; margin: 0 calc(var(--distance)*.32); }
  .expansion .dot-group i { width: 10px; height: 10px; }
  .expansion .lab-bottom { padding: 22px 18px; grid-template-columns: 1fr; gap: 26px; }
  .expansion .study-description h3 { font-size: 16px; }
  .expansion .study-description p { font-size: 12px; }
  .expansion .depth-plane { width: 100px; height: 100px; }
  .expansion .approach { grid-template-columns: 1fr; gap: 25px; }
  .expansion .principles { padding-top: 12px; }
  .expansion .principles article { padding: 24px 0; }
}
@media(prefers-reduced-motion:reduce) { html { scroll-behavior: auto; } .expansion *, .expansion *::before, .expansion *::after { transition: none !important; animation: none !important; } }
.expansion .text-link:hover { color: var(--accent); }
@media (min-width: 1700px) {
  .expansion .section { padding-left: max(7%, calc((100% - 1500px)/2)); padding-right: max(7%, calc((100% - 1500px)/2)); }
}
@media (min-width: 601px) and (max-width: 900px) {
  .expansion .lab-bottom { grid-template-columns: 1fr 250px; gap: 25px; }
  .expansion .approach { gap: 7%; }
}