:root { --ink: #20221f; --paper: #f2efe7; --line: rgba(32,34,31,.2); --acid: #d5ff32; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Arial, Helvetica, sans-serif; }
button, a { color: inherit; }
main { min-height: 100vh; padding: 0 34px 30px; overflow: hidden; }
.topbar { height: 76px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; border-bottom: 1px solid var(--line); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; }
.brand { width: fit-content; font-size: 20px; font-weight: 900; letter-spacing: -.04em; text-decoration: none; }
.topbar p { margin: 0; }
.edition { justify-self: end; }
.hero { min-height: calc(100vh - 218px); display: grid; grid-template-columns: minmax(230px,.82fr) minmax(420px,1.65fr) minmax(210px,.7fr); align-items: center; gap: 28px; }
.intro { z-index: 2; }
.eyebrow { margin: 0 0 22px; font-size: 10px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(48px,5vw,84px); line-height: .9; letter-spacing: -.075em; font-weight: 500; }
.lead { max-width: 340px; margin: 32px 0 0; font-size: 14px; line-height: 1.55; }
.stage { min-height: 620px; height: calc(100vh - 220px); max-height: 780px; position: relative; }
.stage::before { content: ""; position: absolute; width: min(37vw,530px); aspect-ratio: 1; left: 50%; top: 50%; transform: translate(-50%,-50%); border-radius: 50%; background: var(--acid); }
.canvas-host { position: absolute; inset: 0; z-index: 1; }
.canvas-host canvas { position: absolute; inset: 0; display: block; width: 100%; height: 100%; cursor: grab; }
.canvas-host canvas:active { cursor: grabbing; }
.loader { position: absolute; left: 50%; top: 50%; z-index: 3; transform: translate(-50%,-50%); display: flex; align-items: center; gap: 10px; font-size: 10px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.loader.hidden { display: none; }
.loader.error { color: #902a20; }
.loader span { width: 9px; height: 9px; border: 1px solid currentColor; border-top-color: transparent; border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.gesture-hint { position: absolute; bottom: 20px; left: 50%; z-index: 2; transform: translateX(-50%); white-space: nowrap; font-size: 9px; letter-spacing: .11em; text-transform: uppercase; pointer-events: none; }
.stage-number { position: absolute; top: 11%; right: 0; color: rgba(32,34,31,.13); font-size: 116px; font-weight: 700; letter-spacing: -.08em; }
.details { border-top: 1px solid var(--ink); padding-top: 17px; }
.details h2 { margin: 0; font-size: 34px; font-weight: 500; letter-spacing: -.045em; }
.dimensions { margin: 10px 0 0; font-size: 11px; letter-spacing: .08em; }
.description { margin: 28px 0; font-size: 13px; line-height: 1.55; }
.material-row { display: flex; align-items: center; gap: 10px; font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.swatch { width: 26px; height: 26px; border: 1px solid var(--line); border-radius: 50%; background: #f8f6ef; box-shadow: inset 0 0 0 5px white; }
.product-nav { display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.product-nav button { min-height: 98px; display: grid; grid-template-columns: 40px 1fr auto; align-items: center; gap: 12px; padding: 18px 20px; border: 0; border-right: 1px solid var(--line); background: transparent; text-align: left; font: inherit; font-size: 17px; cursor: pointer; transition: background 180ms ease; }
.product-nav button:last-child { border-right: 0; }
.product-nav button:hover { background: rgba(255,255,255,.5); }
.product-nav button.active { background: var(--ink); color: var(--paper); }
.product-nav button > span { font-size: 10px; opacity: .65; }
.product-nav small { font-size: 9px; font-weight: 400; letter-spacing: .06em; }
@media (max-width: 980px) {
  main { padding: 0 20px 24px; }
  .hero { grid-template-columns: 1fr 1.5fr; }
  .intro { padding-top: 42px; }
  .stage { min-height: 540px; height: 64vh; }
  .details { grid-column: 1/-1; display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; margin-bottom: 30px; }
  .details .eyebrow, .details h2, .details .dimensions { grid-column: 1; }
  .details .description, .details .material-row { grid-column: 2; }
  .details .description { grid-row: 1/span 2; margin: 0; }
}
@media (max-width: 680px) {
  .topbar { grid-template-columns: 1fr auto; }
  .topbar p { display: none; }
  .hero { display: block; }
  .intro { padding: 42px 0 10px; }
  h1 { font-size: 50px; }
  .lead { margin-top: 22px; }
  .stage { height: 58vh; min-height: 430px; }
  .stage::before { width: 78vw; }
  .stage-number { font-size: 78px; right: 5px; }
  .gesture-hint { font-size: 8px; }
  .details { display: block; }
  .details .description { margin: 22px 0; }
  .product-nav { grid-template-columns: 1fr; }
  .product-nav button { min-height: 68px; border-right: 0; border-bottom: 1px solid var(--line); }
  .product-nav button:last-child { border-bottom: 0; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { animation-duration: .01ms !important; } }