*{box-sizing:border-box}html,body{margin:0;overflow-x:clip}html{scroll-behavior:smooth}body{font:16px/1.6 var(--body);background:var(--bg);color:var(--ink)}h1,h2,h3,p,figure{margin:0}h1,h2{font-family:var(--display);font-weight:var(--weight,400);letter-spacing:-.03em;line-height:1.08;overflow-wrap:anywhere;min-width:0;text-wrap:balance}h1{font-size:clamp(44px,6vw,96px)}h2{font-size:clamp(32px,4vw,60px)}h3{font-size:22px;line-height:1.3}p{max-width:64ch}img{display:block;max-width:100%;height:auto}a{color:inherit;text-underline-offset:4px}button,input,select,textarea{font:inherit;color:inherit;caret-color:var(--ink)}::selection{background:var(--accent);color:var(--ink)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--ink);outline-offset:5px}.skip{position:absolute;left:12px;top:-100px;z-index:100;padding:12px;background:var(--bg)}.skip:focus{top:10px}.site-header{display:flex;justify-content:space-between;align-items:center;min-height:72px;padding:12px 4vw;gap:16px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;letter-spacing:-.03em;white-space:nowrap}.brand img{width:28px;height:28px}.site-header nav{display:flex;align-items:center;gap:24px}.site-header nav a{display:flex;align-items:center;min-height:44px;font-size:14px;text-decoration:none;white-space:nowrap}.site-header>*{min-width:0}.action{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:10px 22px;border:1px solid var(--ink);background:var(--ink);color:var(--bg);font-size:15px;text-decoration:none;white-space:nowrap;cursor:pointer}.action:hover{opacity:.85}.section{padding:90px 6vw;scroll-margin-top:24px}.copy{display:grid;gap:24px}.lead{font-size:22px;line-height:1.45}.small{font-size:13px}.pair{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:5vw;align-items:center}.pair>*{min-width:0}.wide{width:100%;height:auto}.scene{position:relative;aspect-ratio:1.4;min-width:0}.scene>img,.scene>svg{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.scene>img{pointer-events:none}.scene [data-layer],.scene [data-eyes]{transition:translate 240ms cubic-bezier(.16,1,.3,1)}.icon{width:32px;height:32px;flex-shrink:0}.icon-row{display:flex;align-items:center;gap:24px;padding:22px 0;border-bottom:1px solid var(--line)}.icon-row p{margin-left:auto;width:44%;font-size:15px}.field{display:grid;gap:8px}label{font-size:14px;font-weight:700}input,textarea,select{min-height:48px;min-width:0;width:100%;border:1px solid var(--line);background:var(--field,var(--bg));padding:14px;border-radius:var(--radius,0)}input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}textarea{resize:vertical;min-height:110px}.note-form fieldset{display:grid;gap:18px;margin:0;padding:0;border:0;min-width:0}.status,.field-error{font-size:14px;min-height:1.5em;overflow-wrap:anywhere}.field-error{color:var(--ink);font-weight:700}.password-field{display:flex;border:1px solid var(--line);background:var(--field,var(--bg));border-radius:var(--radius,0)}.password-field input{border:0;flex:1;min-width:0;background:transparent}.password-toggle{border:0;background:transparent;min-width:66px;min-height:48px;padding:8px 14px;cursor:pointer}.auth-copy{max-width:440px;width:100%}.auth-copy h1{font-size:clamp(36px,4vw,56px);margin-bottom:18px}.auth-copy>p{margin-bottom:24px}.auth-copy fieldset{display:grid;gap:12px;margin:0;padding:0;border:0;min-width:0}.auth-copy button[type=submit]{width:100%;margin-top:10px}.auth-help{margin-top:24px}.auth-shell{min-height:calc(100dvh - 160px);padding:48px 6vw;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:6vw;align-items:center}.auth-shell>*{min-width:0}details{border-top:1px solid var(--line)}summary{cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:62px;padding:14px 0;list-style:none}summary::-webkit-details-marker{display:none}summary svg{width:24px;height:24px;flex-shrink:0}details>p{padding:0 24px 24px 0;font-size:15px}.morph-fallback-minus{display:none}details[open]:not(.morph-enhanced) .morph-fallback-plus{display:none}details[open]:not(.morph-enhanced) .morph-fallback-minus{display:inline}.choices{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:6vw;align-items:center}.choice{display:grid;gap:18px}.choice img{width:100%;height:auto}.actions{display:flex;gap:16px;flex-wrap:wrap}.site-footer{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:24px 4vw;border-top:1px solid var(--line);font-size:13px}.site-footer a{display:flex;align-items:center;min-height:44px;white-space:nowrap}fieldset:disabled{opacity:.65}.assembly-stage{position:relative}.motion-ready .assembly-stage{height:180vh}.assembly-pin{padding:60px 6vw;min-height:80vh}.motion-ready .assembly-pin{position:sticky;top:24px}.assembly-parts{position:relative;aspect-ratio:1.4}.assembly-parts img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}.chapters{position:relative;isolation:isolate}.chapter{position:relative;min-height:85vh;padding:80px 6vw}.motion-ready .chapter{position:sticky;top:24px}.orbit-stage{position:relative}.orbit-field{position:relative;min-height:500px}.orbit-field svg{width:100%;height:100%;position:absolute;inset:0}.orbit-field img{position:absolute;left:calc(50% - 110px);top:calc(50% - 80px);width:220px;height:160px;object-fit:contain}.orbit-field [data-orbit]{transition:transform 100ms ease-out}.sheet-frame{padding:32px;border:1px solid var(--line)}@media(max-width:1199px),(max-height:799px){.pair,.choices,.auth-shell{grid-template-columns:minmax(0,1fr)}.motion-ready .chapter,.motion-ready .assembly-pin{position:relative}.motion-ready .assembly-stage{height:auto}.section{padding:64px 6vw}.auth-copy{max-width:560px;margin:auto}.auth-shell .scene{max-width:650px;width:100%;margin:auto}.chapter{min-height:auto}.auth-shell{padding:32px 6vw}}@media(max-width:600px){.optional{display:none!important}.site-header{padding:10px 5vw;gap:10px}.site-header nav{gap:18px}.brand{font-size:15px}.section{padding:48px 6vw}.lead{font-size:18px}.site-footer{align-items:start;flex-direction:column;gap:0}.icon-row{gap:16px;flex-wrap:wrap}.icon-row p{width:100%;margin:0;padding-left:48px}.auth .scene{max-height:260px}.auth-copy h1{font-size:36px}.sheet-frame{padding:18px}.orbit-field{min-height:380px}.chapter{padding:48px 6vw}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.scene [data-layer],.scene [data-eyes],.orbit-field [data-orbit]{transition:none}.motion-ready .chapter,.motion-ready .assembly-pin{position:relative}.motion-ready .assembly-stage{height:auto}}

.scene>img,.scene>svg{scale:1.3}.scene{overflow:clip}.assembly-parts img{scale:1.3}.orbit-field img{scale:1.3}@media(max-width:600px){.scene>img,.scene>svg{scale:1.2}.assembly-parts img{scale:1.15}}