:root{color-scheme:dark;--bg:#091522;--panel:#102231;--panel-soft:#122735;--line:#2a4352;--text:#edf5f5;--muted:#adc3cc;--teal:#66e0ca;--amber:#ffcc80;--error:#ffb4a9;font-family:Inter,"Noto Sans JP","Yu Gothic",Meiryo,system-ui,sans-serif;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 8% 0%,#153641 0,transparent 45%),var(--bg);color:var(--text);line-height:1.65;font-size:15px}button,input,select,textarea{font:inherit}button,input,select,textarea,a{-webkit-tap-highlight-color:transparent}button{min-height:44px;border:1px solid var(--line);border-radius:10px;padding:9px 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#9d8050;background:#3d3323;color:#ffe0a7;border-radius:30px;padding:5px 10px;white-space:nowrap;font-size:11px;font-weight:700}.visual-intro{color:var(--muted);font-size:13px;padding:0 24px;max-width:640px;margin-bottom:12px}.scene-view{position:relative;isolation:isolate;height:clamp(350px,43vw,540px);min-width:0;overflow:hidden;background:#091522}.scene-view canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab}.scene-view canvas.dragging{cursor:grabbing}.scene-loading{position:absolute;inset:45% 15% auto;text-align:center;color:var(--muted);pointer-events:none}.scene-caption{position:absolute;bottom:12px;left:18px;right:18px;display:flex;justify-content:space-between;gap:12px;font-size:10px;letter-spacing:.06em;color:#bdd3d9;pointer-events:none}.dimension-marker{position:absolute;transform:translate(-50%,-50%);min-height:44px;max-width:140px;border-radius:9px;padding:7px 10px;background:#0b1d2beb;border:1px solid #7ea4ae;font-size:12px;box-shadow:0 5px 16px #0004;line-height:1.4;z-index:2}.dimension-marker:active:not(:disabled){transform:translate(-50%,-50%)}.dimension-marker.selected{border-color:var(--amber);color:#ffdfa8;background:#352c1eee}.dimension-marker.uncertain{border-style:dashed}.scene-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:15px 20px 10px;border-top:1px solid var(--line)}.scene-toolbar p{margin:0;font-size:12px;color:var(--teal);font-weight:700}.view-buttons{display:flex;gap:6px;flex-wrap:wrap}.view-buttons button{font-size:12px;padding:7px 10px}.small{font-size:12px;color:var(--muted);line-height:1.7;margin-bottom:12px;overflow-wrap:anywhere}.visual-panel> .small{margin-inline:22px}.boundary-note{border-top:1px solid #243c49;padding-top:12px}.display-options{display:flex;flex-wrap:wrap;gap:4px 20px;padding:0 22px 15px;color:var(--muted);font-size:12px}.display-options label{display:flex;gap:8px;align-items:center;min-height:44px;cursor:pointer}.display-options input{width:18px;height:18px;accent-color:var(--teal);flex:none}.input-panel{padding:24px;background:#112331}.section-heading{display:flex;justify-content:space-between;gap:12px;align-items:start}.section-heading button{flex-shrink:0;font-size:12px}.sample-note{border-left:3px solid var(--amber);padding:8px 12px;background:#ffcc8009;color:#e0d2b8;font-size:12px;margin:4px 0 12px}.quiet-button{width:100%;margin-bottom:18px;background:transparent;border-color:#527480;color:#d5edef}.unit-row{display:flex;justify-content:space-between;align-items:center;margin:4px 0 12px}.unit-row label{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:8px}select{min-height:44px;background:#091a27;color:var(--text);border:1px solid #41606d;border-radius:9px;padding:7px 24px 7px 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var(--line);overflow-wrap:anywhere}.missing-list{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0 0 15px;padding:0}.missing-list button{text-align:left;font-size:12px;color:#ffd4c9;background:#352b2b;border-color:#73504b;padding:8px 11px}.draft-panel textarea{display:block;width:100%;max-width:100%;resize:vertical;border:1px solid #324b58;border-radius:12px;background:#081923;color:#dbe9e9;font-family:inherit;line-height:1.85;font-size:13px;padding:16px;min-height:300px;overflow-wrap:anywhere}.draft-panel h2{font-size:18px}.draft-panel #copy-status{margin-top:10px;margin-bottom:0}footer{padding:0 30px 30px;color:var(--muted);font-size:11px}footer p{margin-bottom:8px}summary{cursor:pointer;min-height:30px;display:list-item}details p{max-width:760px;padding-top:6px}.fallback{position:absolute;inset:0;overflow:auto;background:#0b1d2b;padding:24px 20px 45px}.fallback h3{font-size:18px;color:var(--teal);margin-bottom:10px}.fallback p{font-size:12px;color:var(--muted)}.fallback-diagrams{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.fallback figure{margin:0;min-width:0;background:#102a37;border:1px solid #355565;border-radius:12px;padding:8px}.fallback svg{width:100%;height:auto;display:block;max-height:180px}.fallback rect{fill:#1b6c65;stroke:#83e8d2;stroke-width:2;vector-effect:non-scaling-stroke}.fallback figcaption{text-align:center;font-size:12px;color:#d1e7e8}.fallback #fallback-dimensions{color:var(--amber);margin-top:16px}.noscript{padding:20px;background:#402c24;color:#ffe3ce}@media(min-width:1700px){.scene-view{height:570px}}@media(max-width:1050px){.workspace{grid-template-columns:minmax(0,1fr) minmax(320px,.85fr);gap:16px}.input-panel{padding:18px}.visual-heading{padding-inline:18px;flex-wrap:wrap;gap:2px}.visual-intro{padding-inline:18px}.visual-heading .badge{margin-bottom:12px}.dimension-fields{gap:7px}.results{gap:16px}.scene-toolbar{padding-inline:15px}.scene-view{height:410px}}@media(max-width:820px){.page-header{padding:22px 18px;align-items:start;flex-wrap:wrap;gap:15px}.sound-controls{max-width:none;justify-items:start}.sound-controls span{text-align:left}main{padding-inline:16px}.workspace,.results{grid-template-columns:minmax(0,1fr)}.visual-panel{position:relative;top:auto}.visual-heading{padding-top:22px;flex-wrap:nowrap}.visual-heading h2{font-size:25px}.scene-view{height:440px}.input-panel,.check-panel,.draft-panel{padding:22px}.results{margin-top:16px}footer{padding-inline:20px}.input-panel h2{font-size:22px}}@media(max-width:460px){body{font-size:14px}.page-header{padding:20px 14px 16px}h1{font-size:24px}main{padding-inline:10px}.visual-panel,.input-panel,.check-panel,.draft-panel{border-radius:17px}.visual-heading{padding:18px 15px 0;flex-wrap:wrap}.visual-heading h2{font-size:25px}.visual-heading .badge{margin-bottom:10px}.visual-intro{padding-inline:15px;font-size:12px}.scene-view{height:390px}.scene-caption{left:12px;right:12px;font-size:9px}.scene-toolbar{gap:8px}.view-buttons{width:100%}.view-buttons button{flex:1;padding-inline:7px}.visual-panel>.small{margin-inline:15px}.display-options{padding-inline:15px;gap:0 12px}.input-panel,.check-panel,.draft-panel{padding:18px 15px}.dimension-fields{gap:7px}.dimension-fields input{font-size:16px;padding-inline:8px}.axis-tag{margin-left:1px}.two-fields{grid-template-columns:minmax(0,.65fr) minmax(0,1.35fr);gap:9px}.section-heading{flex-wrap:wrap}.draft-panel .section-heading{margin-bottom:10px}.fallback{padding-inline:14px}.fallback-diagrams{gap:8px}.dimension-marker{font-size:11px;max-width:124px;padding:7px}.eyebrow{letter-spacing:.09em}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}button:active:not(:disabled){transform:none}.dimension-marker:active:not(:disabled){transform:translate(-50%,-50%)}}

.quick-action{padding:0 24px 14px}.quick-action .primary-button{margin:0;max-width:380px}@media(max-width:700px){.page-header{padding:14px 16px;gap:10px}.page-header h1{font-size:22px}.visual-heading{padding-top:16px}.visual-intro{margin-bottom:8px}.quick-action{padding-bottom:10px}.scene-view{height:340px}}