:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;color:#232c32;background:#f6f5f1;font-synthesis:none;line-height:1.65;font-weight:400;--muted:#687078;--line:#e4e5df;--orange:#e77532;--dark:#253a36}
*{box-sizing:border-box}body{margin:0}button,select,input{font:inherit}button,select,a,input{outline-offset:4px}button:focus-visible,select:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #e77532}button{border:1px solid var(--line);border-radius:9px;padding:10px 14px;background:#fff;color:inherit;cursor:pointer;font-size:14px;font-weight:600;transition:background .15s,transform .15s}button:hover:enabled{background:#f0f1eb}button:active:enabled{transform:translateY(1px)}button:disabled{opacity:.4;cursor:default}a{color:inherit;text-underline-offset:4px}.topbar{max-width:1480px;margin:auto;display:flex;align-items:center;gap:14px;padding:22px 40px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:22px;letter-spacing:.02em}.badge{background:#eaece6;color:#52635a;font-size:10px;letter-spacing:.12em;font-weight:700;padding:4px 8px;border-radius:5px}.app-link{margin-left:auto;text-decoration:none;font-size:13px;color:var(--muted)}.app-link span{margin-left:10px}main{max-width:1480px;margin:auto;padding:34px 40px 24px}.intro{margin-bottom:28px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:.12em;color:#66776d;margin:0 0 6px}.intro h1{font-size:clamp(24px,3vw,34px);line-height:1.45;letter-spacing:-.04em;margin:0 0 8px;font-weight:750}.intro>p:last-child{margin:0;font-size:14px;color:var(--muted)}.workspace{display:grid;grid-template-columns:302px minmax(0,1fr);gap:20px;align-items:start}.controls{display:grid;gap:16px}.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}.card h2{font-size:14px;font-weight:700;margin:0 0 18px;display:flex;align-items:center;gap:9px}.number{font-size:10px;color:#7f887e;letter-spacing:.05em}.card label{display:block;font-size:12px;font-weight:600;color:#626d70;margin:16px 0 6px}select{display:block;width:100%;min-width:0;background:#fafbf8;border:1px solid #dce0d9;border-radius:8px;padding:10px 26px 10px 10px;color:#303b3c;font-size:13px;text-overflow:ellipsis}.dimensions{display:flex;gap:5px;margin-top:16px;flex-wrap:wrap}.dimensions span{font-size:10px;padding:3px 6px;background:#f4f5f1;border-radius:4px;color:#56615d}.small{font-size:12px;color:var(--muted);margin:8px 0}.model-note{font-size:11px;color:#7a817c;line-height:1.8;border-top:1px solid #eceee7;padding-top:12px;margin:14px 0 0}.primary,.secondary{width:100%;min-height:45px}.primary{background:var(--dark);border-color:var(--dark);color:#fff}.primary:hover:enabled{background:#334e47}.primary span{font-size:11px;margin-right:8px}.secondary{margin-top:8px;background:transparent;color:#65716a}.steps{list-style:none;padding:0;margin:18px 0;counter-reset:step}.steps li{counter-increment:step;display:flex;align-items:center;gap:10px;font-size:12px;color:#81877f;min-height:30px}.steps li:before{content:counter(step);display:flex;align-items:center;justify-content:center;width:19px;height:19px;background:#f0f2eb;border-radius:50%;font-size:9px;font-weight:700}.steps li.active{color:#b85622;font-weight:700}.steps li.active:before{background:#fbe3d2;color:#ad4d1b}.steps li.done:before{background:#e4ebe2;color:#496846}.manual{border-top:1px solid #eceee7;padding-top:12px}.button-pair{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:8px}.button-pair button{padding:8px 6px;font-size:12px}.viewer-card{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;min-width:0}.viewer-top{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:17px 22px;border-bottom:1px solid #f0f1ec}.live-label{font-size:11px;color:#758078}.status-dot{display:inline-block;width:6px;height:6px;margin-right:7px;border-radius:50%;background:#8b9d86}.toggle{display:flex;align-items:center;gap:7px;font-size:12px;color:#52635a;cursor:pointer}.toggle input{accent-color:var(--dark);width:15px;height:15px}.viewport{height:570px;height:clamp(410px,52vw,620px);position:relative;background:#fff}.viewport canvas{width:100%;height:100%;display:block;cursor:grab}.viewport canvas:active{cursor:grabbing}.loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none;background:#fafbf8;font-size:13px;color:var(--muted);padding:32px;text-align:center}.loading[hidden]{display:none}.loading.failed{background:#fff3e9;color:#943c14}.stage{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);max-width:85%;width:max-content;padding:8px 17px;border:1px solid #e4e8df;border-radius:30px;font-size:12px;box-shadow:0 2px 12px #273b3510;background:#fffffff2;color:#5a685e;pointer-events:none}.stage.running{background:var(--dark);color:#fff;border-color:var(--dark)}.viewer-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 20px;border-top:1px solid #f0f1ec;font-size:10px;color:#7b847d}.viewer-bottom>div{display:flex;gap:6px}.text-button{background:transparent;border:0;padding:7px;font-size:11px;color:#506459}.demo-note{background:#f7f8f3;border-top:1px solid #eceee6;padding:16px 22px;display:flex;gap:18px;align-items:start}.note-tag{white-space:nowrap;font-size:10px;font-weight:700;color:#68765f;padding-top:2px}.demo-note p{margin:0;font-size:11px;line-height:1.9;color:#71796e}.details{margin:22px 0 0;border-top:1px solid #dfe3d9;padding-top:18px;color:#667267;font-size:12px}.details summary{cursor:pointer;width:fit-content;font-weight:600}.details-content{padding:6px 0 0 16px;max-width:1000px}.details-content p{margin:12px 0}.details-content ul{padding-left:20px}.details-content li{margin:5px 0}.source{font-size:10px;color:#7c857d;overflow-wrap:anywhere}footer{max-width:1480px;margin:0 auto;display:flex;justify-content:space-between;padding:18px 40px 30px;font-size:10px;color:#8a9388}footer span:first-child{font-weight:750;letter-spacing:.06em}.noscript{padding:30px;text-align:center;background:#fff0d9}
@media(min-width:1500px){.viewport{height:620px}}
@media(max-width:1000px){.workspace{grid-template-columns:270px minmax(0,1fr)}.card{padding:18px}.viewer-top{padding:16px}.viewer-bottom{flex-wrap:wrap}.demo-note{display:block;padding:14px 16px}.demo-note p{margin-top:4px}.viewport{height:510px}}
@media(max-width:720px){.topbar{padding:16px 20px;gap:9px}.brand{font-size:18px}.brand img{width:28px;height:28px}.app-link{font-size:11px}.badge{font-size:8px;padding:3px 5px}main{padding:26px 18px 20px}.intro{margin-bottom:20px}.intro h1{font-size:25px}.intro>p:last-child{font-size:12px}.workspace{display:flex;flex-direction:column;gap:14px}.controls{display:contents}.card:first-child{width:100%;padding:18px;order:0}.card:first-child h2{margin-bottom:10px}.viewer-card{width:100%;order:1}.card:nth-child(2){width:100%;order:2}.card label{margin-top:10px}.dimensions{margin-top:12px}.model-note{font-size:10px;padding-top:9px;margin-top:10px}.viewport{height:390px}.viewer-top{padding:12px 14px}.live-label{font-size:10px}.viewer-bottom{padding:8px 12px}.viewer-bottom>span{font-size:9px}.viewer-bottom>div{margin-left:auto}.text-button{font-size:10px}.demo-note{padding:12px 15px}.steps{display:grid;grid-template-columns:1fr 1fr;margin:14px 0;gap:3px}.steps li{font-size:11px}.details{margin-top:18px;font-size:11px}.details-content{padding-left:4px}footer{padding:14px 20px 24px;font-size:9px}}
@media(prefers-reduced-motion:reduce){button{transition:none}}