:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--ink:#141514;--muted:#626a67;--panel:#ffffffe8;--line:#14151421;--soft:#f5f6f2;--teal:#0b8f7f;--coral:#de5b43;--amber:#d5a038;--blue:#477fb3;--green:#4d965d;--shadow:0 24px 70px #181a1929;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px;line-height:1.5}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--soft);min-width:320px;color:var(--ink);margin:0}button,input{font:inherit}button{color:inherit}a{color:inherit;text-decoration:none}.topbar{z-index:20;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#f8f9f6cc;border-bottom:1px solid #14151414;justify-content:space-between;align-items:center;gap:24px;min-height:76px;padding:16px clamp(18px,5vw,58px);display:flex;position:fixed;top:0;left:0;right:0}.brand{align-items:center;gap:12px;min-width:0;display:inline-flex}.brand-mark{border:2px solid var(--ink);background:linear-gradient(90deg,#0000 45%,#14151438 45% 55%,#0000 55%),linear-gradient(#fff 0%,#cdece7 100%);border-radius:8px;flex:none;width:38px;height:38px;box-shadow:inset 0 -6px #0b8f7f29}.brand strong,.brand small{display:block}.brand strong{font-size:.97rem;line-height:1.1}.brand small{color:var(--muted);font-size:.78rem}.topnav{align-items:center;gap:8px;display:flex}.topnav a{color:#313633;text-align:center;border:1px solid #0000;border-radius:6px;min-width:74px;padding:9px 12px;font-size:.92rem}.topnav a:hover,.topnav a:focus-visible{border-color:var(--line);background:#fff;outline:none}.demo-shell{background:linear-gradient(135deg, #ffffffe6, #e4f1edcc), radial-gradient(circle at 18% 86%, #d5a0382e, transparent 32%), radial-gradient(circle at 80% 22%, #477fb324, transparent 30%), var(--soft);grid-template-columns:minmax(0,1fr) minmax(330px,420px);min-height:100svh;display:grid;position:relative;overflow:hidden}.scene-stage{min-height:100svh;position:relative}#scene{cursor:grab;width:100%;height:100%;min-height:100svh;display:block}#scene:active{cursor:grabbing}.scene-hud{pointer-events:none;flex-wrap:wrap;gap:8px;max-width:min(520px,100vw - 36px);display:flex;position:absolute;bottom:24px;left:clamp(18px,5vw,58px)}.scene-hud span,.eyebrow{color:#2f3633;letter-spacing:0;background:#ffffffc7;border:1px solid #1415141f;border-radius:6px;align-items:center;min-height:28px;padding:4px 8px;font-size:.78rem;font-weight:700;display:inline-flex}.control-panel{z-index:5;background:var(--panel);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);border:1px solid #1415141f;border-radius:8px;align-self:center;margin:96px clamp(18px,4vw,44px) 42px 0;padding:24px}.panel-heading{gap:12px;display:grid}.panel-heading h1{letter-spacing:0;max-width:10ch;margin:0;font-size:clamp(2rem,3.4vw,3.4rem);line-height:1.02}.panel-heading p:not(.eyebrow),.section-copy p,.build-panel p{color:var(--muted);margin:0;font-size:.98rem}.control-block{gap:10px;margin-top:22px;display:grid}.readout-row,.scale-row,.force-card>div:first-child{justify-content:space-between;align-items:baseline;gap:14px;display:flex}.readout-row span,.control-label,.force-card span{color:#454b48;font-size:.84rem;font-weight:700}.readout-row strong{color:var(--coral);font-size:1.4rem}#volume-slider{width:100%;accent-color:var(--coral)}.scale-row{color:#6d7470;font-size:.78rem}.segmented-control,.choice-grid,.action-grid,.material-grid,.build-steps{gap:8px;display:grid}.segmented-control{grid-template-columns:repeat(3,minmax(0,1fr))}.choice-grid,.action-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.segmented-control button,.choice-grid button,.action-grid button,.material-card{color:#2d3431;cursor:pointer;background:#fff;border:1px solid #14151424;border-radius:6px;min-height:42px;font-weight:750;transition:transform .16s,border-color .16s,background .16s,color .16s}.segmented-control button:hover,.choice-grid button:hover,.action-grid button:hover,.material-card:hover{transform:translateY(-1px)}.segmented-control button:focus-visible,.choice-grid button:focus-visible,.action-grid button:focus-visible,.material-card:focus-visible{outline-offset:2px;outline:3px solid #0b8f7f38}.segmented-control .is-active,.choice-grid .is-active,.action-grid [aria-pressed=true],.material-card.is-active{color:#075c52;background:#e9f7f4;border-color:#0b8f7f85}.force-card{background:#fff;border:1px solid #1415141f;border-radius:8px;gap:10px;margin-top:22px;padding:14px;display:grid}.force-card strong{color:#075c52}.force-bar{background:#e4e9e6;border-radius:5px;height:10px;overflow:hidden}.force-bar span{border-radius:inherit;background:linear-gradient(90deg, var(--teal), var(--green));width:92%;height:100%;transition:width .22s,background .22s;display:block}.material-band,.engineering-band{background:#fff;grid-template-columns:minmax(260px,.72fr) minmax(0,1fr);gap:clamp(22px,5vw,56px);padding:clamp(56px,8vw,92px) clamp(18px,6vw,76px);display:grid}.section-copy,.build-panel{align-content:start;gap:12px;display:grid}.section-copy h2,.build-panel h2{letter-spacing:0;max-width:15ch;margin:0;font-size:clamp(1.8rem,3.1vw,3.2rem);line-height:1.05}.material-grid{grid-template-columns:repeat(5,minmax(150px,1fr))}.material-card{text-align:left;align-content:start;gap:10px;min-height:180px;padding:16px;display:grid}.material-card strong{font-size:1rem;line-height:1.18}.material-card span:last-child{color:var(--muted);font-size:.88rem;font-weight:500}.swatch{border:1px solid #14151424;border-radius:8px;width:38px;height:38px}.swatch-tritan{background:linear-gradient(135deg,#fff,#bfece6)}.swatch-silicone{background:linear-gradient(135deg,#1f2422,#8fb2aa)}.swatch-abs{background:linear-gradient(135deg,#151817,#595f5b)}.swatch-pom{background:linear-gradient(135deg,#263b4b,#72a0c2)}.swatch-magnet{background:linear-gradient(135deg,#de5b43,#d5a038)}.engineering-band{background:linear-gradient(135deg,#f5f6f2eb,#ecf6f3eb),#f5f6f2;border-top:1px solid #1415141a}.build-steps{grid-template-columns:repeat(3,minmax(0,1fr))}.build-steps div{background:#fff;border:1px solid #1415141f;border-radius:8px;align-content:start;gap:18px;min-height:190px;padding:18px;display:grid}.build-steps strong{color:#075c52;border:1px solid #14151429;border-radius:8px;place-items:center;width:38px;height:38px;display:grid}.build-steps span{color:#3c4440}@media (width<=1120px){.demo-shell{grid-template-columns:1fr}.scene-stage,#scene{min-height:62svh}.control-panel{width:min(720px,100% - 32px);margin:-58px auto 28px}.panel-heading h1{max-width:12ch}.scene-hud{bottom:82px}.material-band,.engineering-band{grid-template-columns:1fr}.material-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=680px){.topbar{min-height:66px;padding:12px 14px}.brand small,.topnav{display:none}.brand-mark{width:34px;height:34px}.scene-stage,#scene{min-height:56svh}.scene-hud{bottom:76px;left:14px}.control-panel{width:calc(100% - 24px);margin-top:-42px;padding:18px}.panel-heading h1{max-width:14ch;font-size:2rem}.choice-grid,.action-grid,.material-grid,.build-steps{grid-template-columns:1fr}.material-band,.engineering-band{padding:46px 14px}.material-card,.build-steps div{min-height:auto}}